Journal articles: 'Computed radiographic'

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Mattoon, J. S. "Digital radiography." Veterinary and Comparative Orthopaedics and Traumatology 19, no. 03 (2006): 123–32. http://dx.doi.org/10.1055/s-0038-1632988.

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SummaryDigital radiography has been used in human medical imaging since the 1980's with recent and rapid acceptance into the veterinary profession. Using advanced image capture and computer technology, radiographic images are viewed on a computer monitor. This is advantageous because radiographic images can be adjusted using dedicated computer software to maximize diagnostic image quality. Digital images can be accessed at computer workstations throughout the hospital, instantly retrieved from computer archives, and transmitted via the internet for consultation or case referral. Digital radiographic data can also be incorporated into a hospital information system, making record keeping an entirely paperless process. Digital image acquisition is faster when compared to conventional screen-film radiography, improving workflow and patient throughput. Digital radiography greatly reduces the need for “retake” radiographs because of wide latitude in exposure factors. Also eliminated are costs associated with radiographic film and x-ray film development. Computed radiography, charged coupled devices, and flat panel detectors are types of digital radiography systems currently available.

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Lee, H., J. Kim, Y. Cho, M. Kim, N. Kim, and K. Lee. "Three-dimensional computed tomographic volume rendering imaging as a teaching tool in veterinary radiology instruction." Veterinární Medicína 55, No. 12 (2010): 603–9. http://dx.doi.org/10.17221/2950-vetmed.

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The educational value of three-dimensional computed tomography (3D CT) volume rendering imaging was compared to conventional plain radiographic instruction in a veterinary radiology class. Veterinary radiology is an important subject in veterinary medicine and has been well-recognized as a primary diagnostic method. Many junior and senior students have difficulty interpreting two dimensional radiographs that depict three-dimensional organs. A total of 158 junior veterinary students with knowledge of anatomy, pathology, physiology, and other basic subjects were divided into two groups; Group 1 (n = 45) received conventional radiographic instruction using normal and representative abnormal canine thoracic and abdominal radiographs followed by repetition of the same one week later, while Group 2 (n = 113) received plain radiograph instruction as in Group 1 followed by volume-rendered 3D CT images from the same canine patient one week later. The evaluations were performed at the end of each instruction. In Group 1, the majority did not understand the radiographic signs and no significant improvement was observed. In Group 2, 13% and 20% of the students learned only from radiographs, and understood the thoracic and abdominal radiographic alterations, respectively. After studying the 3D CT images, more than 94% of the students deduced the reasons for the radiographic alterations on the radiographs (P &lt; 0.001). These results strongly suggest that 3D CT imaging is an effective tool for teaching radiographic anatomy to veterinary medical students.

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Nakano, Y., T. Hiraoka, K. Togashi, et al. "Direct radiographic magnification with computed radiography." American Journal of Roentgenology 148, no. 3 (1987): 569–73. http://dx.doi.org/10.2214/ajr.148.3.569.

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Decusară, Mioara, Cerasella-Dorina Şincar, Alexandru Nicolau, and Teodora Denisa Gheorghi. "The importance of 3D imaging for the orthodontic diagnosis and treatment." Romanian Journal of Stomatology 62, no. 4 (2016): 183–89. http://dx.doi.org/10.37897/rjs.2016.4.3.

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Within a century, dental radiology “suffered” transformation, beginning with periapical radiographs, cephalograms and panoramic radiography and continuing with digital imaging and cone beam computed tomography. In contemporary dental practice is importantant to choose the type of radiographic investigation in order to achieve a complete and accurate diagnosis, so necessary for determining the treatment plan for patients with dental-maxillary abnormalities. We conducted a comparative study between conventional radiographic investigation (periapical radiographs, panoramic radiography) and cone beam computed tomography in patients with malocclusions. The costs and radiation doses are low to the classic X-rays, but the diagnosis is given by the two-dimensional image of a three-dimensional dental-maxillary pathologies. Cone Beam CT scans were relatively high in cost and in radiation doses, but provided three-dimensional images and anatomic and radiological data of superior quality to the classics.

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Andrade, C. R., B. W. Minto, R. M. Dreibi, et al. "Comparison of radiographic and tomographic evaluations for measurement of the Canal Flare Index in dogs." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 73, no. 3 (2021): 571–82. http://dx.doi.org/10.1590/1678-4162-11987.

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ABSTRACT The outcome of total hip arthroplasty (THA) in dogs is directly related to surgical planning. Templating of radiographs prior to THA should help the surgeon anticipate prosthesis size and femoral shape allowing canal fill of the proximal metaphysis by the implant ensuring primary stable fixation. The canal flare index (CFI) obtained from radiograph has been used as a measure of risk of complications for the technique in human beings and dogs. However, standard radiographs only provide limited data for the selection of cementless prostheses and the assessment of their fit within the femoral canal, due to factors like radiographic magnification and femoral rotation. Therefore, three-dimensional evaluation based on computed tomography (CT) may be a better tool for CFI measurement. The aim of this study was to compare anatomical measurement with CFI values obtained from craniocaudal radiography and CT. Craniocaudal radiographs using a horizontal radiographic beam (CR), CT, and anatomical macroscopic measurements (A) were obtained from 45 femurs from 23 canine cadavers. The differences between the values of CFI obtained from radiograph (CFI-R), computed tomography on transverse (CFI- TT) and longitudinal axis (CFI-TL) compared to the CFI obtained from macroscopic measurements - gold standard - (CFI-A), and 95% limits of agreement (LOA) between the values, were evaluated by the Bland-Altman method. Dimensions obtained from CT techniques had a greatest mean difference from anatomical and CFI values were also different (P=0.032). Under the experimental conditions, the craniocaudal radiograph, provided the most accurate measurement of the CFI (mean difference: 0.087 ± 0.42).

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Abbeyquaye, D., S. Inkoom, N. B. Hammond, J. J. Fletcher, and B. O. Botwe. "PATIENT DOSE ASSESSMENT AND OPTIMISATION OF PELVIC RADIOGRAPHY WITH COMPUTED RADIOGRAPHY SYSTEMS." Radiation Protection Dosimetry 195, no. 1 (2021): 41–49. http://dx.doi.org/10.1093/rpd/ncab111.

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Abstract Digital radiography systems can reduce radiation dose, this capability was harnessed to explore dose and image quality (IQ) optimisation strategies. Entrance surface dose (ESD), effective dose (ED) and organ doses were determined by the indirect method for patients undergoing pelvic anteroposterior X-ray examinations with computed radiography systems. The IQ of patients’ radiographs was assessed in terms of signal-to-noise ratio (SNR). An anthropomorphic phantom was exposed with varying tube potential (kVp), tube current-time product (mAs), and focus-to-detector distance (FDD) to determine phantom-entrance dose for the optimisation studies. SNR of each phantom radiograph was determined. Patients’ mean ESD of 2.38 ± 0.60 mGy, ED of 0.25 ± 0.07 mSv and SNR of 8.5 ± 2.2 were obtained. After optimisation, entrance dose was reduced by 29.2% with 5 cm increment in FDD, and 5 kVp reduction in tube potential. kVp and/or mAs reduction with an increment in FDD reduced entrance dose without adversely compromising radiographic-IQ.

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Merritt, Christopher R. B., Roger H. Tutton, Kenneth A. Bell, et al. "Clinical application of digital radiography: Computed radiographic imaging." RadioGraphics 5, no. 3 (1985): 397–414. http://dx.doi.org/10.1148/radiographics.5.3.397.

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Biasibetti, Martina, Annette Schumacher, Michelle Fabiani, and Gian Rovesti. "The use of the computed tomography in the diagnostic protocol of the elbow in the dog: 24 joints." Veterinary and Comparative Orthopaedics and Traumatology 15, no. 01 (2002): 35–43. http://dx.doi.org/10.1055/s-0038-1632711.

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SummaryThe evaluation of the elbow joint is difficult based on clinical and radiographic examinations. The anatomical structures of its articular components are superimposed with standard radiography, often leading to presumptive diagnoses. When the radiographic findings become more suggestive, usually the early phase of the disease has passed and chronic disease has developed. Because computer-generated slices are not hindered by this superimposition, the use of computed tomography may be beneficial in investigating the joint. The purpose of this study was to evaluate if computed tomography could change or better define the diagnosis previously made on the basis of a radiographic examination in 12 client- owned dogs presented for elbow lameness. As a positive control, 12 out of the 24 imaged joints were surgically or arthroscopically explored. The diagnosis based on computed tomography was different or more precisely defined, compared to the radiographic examination, in 46% of the examined joints. Earlier and more complete definition of elbow joint disease may change the therapeutic options and, potentially, the clinical outcome.

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Wahyuddin, Wahyuddin, AR Rakhmansyah Iskandar, and Nurul Adilah Z. "Analisa Artefak Pada Hasil Radiograf Yang Timbul Akibat Pengolahan Computed Radiography." Lontara 2, no. 1 (2021): 31–34. http://dx.doi.org/10.53861/lontarariset.v2i1.186.

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Artefacts are structures or appearances that are not normally present on radiographs, errors in radiographic processing may be due to technical errors or film processing errors. This research was conducted using Descriptive methods, with the type of literature study that aims to examine the causes of artifacts that can occur as a result of improper handling of film processing errors.The results of the analysis concluded that the frequent occurrence of artifacts in the processing of Computed Radiography is caused by two factors, that is the use of imaging plates and grids lisolm. His advice should be in the processing using Computed Radigraphy the officer must be more careful and pay attention to the components in Computed Radiography.

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Lacava, Giuseppe, Eric Zini, Federica Marchesotti, et al. "Computed tomography, radiology and echocardiography in cats naturally infected with Aelurostrongylus abstrusus." Journal of Feline Medicine and Surgery 19, no. 4 (2016): 446–53. http://dx.doi.org/10.1177/1098612x16636419.

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Objectives The aims of the study were to describe the radiographic and computed tomographic features in cats naturally infected with Aelurostrongylus abstrusus, and to identify signs of pulmonary hypertension with echocardiography. Methods Fourteen cats positive on Baermann test for A abstrusus were included in the study. All cats underwent thoracic radiography, CT and echocardiography. Results The most common clinical signs were coughing (10/14) and dyspnoea (5/14). Radiographic findings included a generalised unstructured interstitial pulmonary pattern (8/14), mixed bronchointerstitioalveolar pattern (3/14) and bronchointerstitial pattern with bronchial wall thickening (3/14). Sternal lymphadenopathy was detected on thoracic radiographs in six cats. On CT, features were mixed bronchointerstitioalveolar pattern with ground-glass appearance in six cats, interstitioalveolar with multiple pulmonary nodules in five, interstitial ground-glass infiltrates in three, regional lymph node enlargement in 11 (10 sternal, three cranial mediastinal and three tracheobronchial lymph nodes) and subpleural thickening in four. None of the thoracic radiographs revealed subpleural thickening. In all cases, pulmonary vessels were normal in terms of size, shape and attenuation on both radiography and CT. Pulmonary hypertension and cardiac abnormalities were not observed in any cat during echocardiography. Conclusions and relevance CT provided a more thorough characterisation of pulmonary and mediastinal lesions compared with thoracic radiographs in cats naturally infected with A abstrusus. Although feline aelurostrongylosis has been previously associated with histopathological lesions in lung arteries, in this cohort clinical evidence of pulmonary hypertension was not documented.

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Verma, Abhishek, Stuti Verma, Anushikha Dhankhar, Nitin Kumar Moral, Nidhi Nagar, and Ajeet Singh Bhadoria. "Predicting the Risk of Inferior Alveolar Nerve Injury in Impacted Lower Third Molars Using Panoramic Radiography and Cone Beam Computed Tomography." Journal of Evolution of Medical and Dental Sciences 10, no. 34 (2021): 2910–14. http://dx.doi.org/10.14260/jemds/2021/593.

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BACKGROUND A serious complication of surgical removal of impacted lower third molars is inferior alveolar nerve (IAN) injury. Evaluation of radiographic factors to predict IAN injury using CT and panoramic radiography includes root morphology assessment, follicular sac size, mandibular bone density, inferior alveolar nerve and vessels, condition of the overlying tissues, relation of the impacted tooth with the body and ramus of the mandible and the adjacent teeth. This study was done to evaluate the radiological features of the impacted lower mandibular teeth and their relationship with IAN through panoramic radiography and CT and to assess the most predictable radiological criteria for inferior alveolar nerve injury in impacted third molar surgery. METHODS All the patients indicated for lower third molar extraction were included in the study and pre-operative conventional panoramic radiographs (Planmeca Proline PM 2002 CC, Helsinki, Finland) and CBCT (Kodak CBCT) were taken. Any post-operative nerve injuries detected were followed up after 15 days or 1 month. Fisher’s exact test was done to find the association between the outcome variable and explanatory variables. RESULTS Only 11.4 % (N = 4) of all participants had IAN injury following surgical disimpaction. All the participants with IAN injury showed narrowing of the canal on their preoperative panoramic radiographs and presence of nerve approximation with the tooth in cone beam computed tomography (CBCT) reports (P < 0.05). CONCLUSIONS A statistically significant association exists between IAN injury and nerve exposure, radiographic signs of nerve involvement for panoramic radiograph, level of third molar impaction, and nerve approximation in CBCT. KEY WORDS Inferior Alveolar Nerve Injury, Lower Third Molar Impaction, Panoramic Radiography, CBCT

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Nakano, Y., K. Togashi, K. Nishimura, et al. "Stomach and duodenum: radiographic magnification using computed radiography (CR)." Radiology 160, no. 2 (1986): 383–87. http://dx.doi.org/10.1148/radiology.160.2.3726117.

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Murphy, Micheal, Richard Hodgson, Peter L. Harris, Richard G. McWilliams, David E. Hartley, and Michael M. D. Lawrence-Brown. "Plain Radiographic Surveillance of Abdominal Aortic Stent-Grafts: The Liverpool/Perth Protocol." Journal of Endovascular Therapy 10, no. 5 (2003): 911–12. http://dx.doi.org/10.1177/152660280301000510.

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Purpose: To present a protocol for plain radiographic surveillance of abdominal aortic stent-grafts that addresses the main variables in need of standardization: (1) patient position, (2) radiographic centering point, and (3) focus-to-film distance. Technique: Our policy is to perform baseline anteroposterior and lateral films following endoluminal grafting and repeat the studies annually. These are the most important films to assess migration and component separation; supplementary right and left posterior oblique radiographs may help identify wireform fractures. It is best to perform radiography before computed tomography if both tests are scheduled for the same day, as excretion of intravenous contrast opacifies the renal collecting systems and interferes with radiographic analysis. Conclusions: Evaluation of the radiographs depends on the design of the stent-graft, so it is important to understand graft construction and the position of the radiopaque markers to best assess changes on follow-up films.

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Kang, Sumi, Se-Won Ha, Ukseong Kim, Sunil Kim, and Euiseong Kim. "A One-Year Radiographic Healing Assessment after Endodontic Microsurgery Using Cone-Beam Computed Tomographic Scans." Journal of Clinical Medicine 9, no. 11 (2020): 3714. http://dx.doi.org/10.3390/jcm9113714.

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This study aimed to evaluate one-year radiographic healing after endodontic microsurgery using CBCT with modified PENN 3D criteria and to compare the outcome with results evaluated using Molven’s criteria. A total of 107 teeth from 96 patients were evaluated one year after endodontic microsurgery by using CBCT scans with modified PENN 3D criteria and periapical radiographs with Molven’s criteria. Both preoperative and postoperative lesion volumes were calculated using ITK-SNAP (free software). Radiographic healing assessment using periapical radiographs and CBCT images, and preoperative and postoperative lesion volume measurements were performed independently by two examiners. The assessment using Molven’s criteria resulted in 75 complete healings, 18 incomplete healings, eight uncertain healings, and six unsatisfactory healings. Based on modified PENN 3D criteria, 64 teeth were categorized as complete healing, 29 teeth as limited healing, six teeth as uncertain healing, and eight teeth as unsatisfactory healing. With the one-year follow-up, CBCT scans showed a lower healing tendency than did periapical radiography. The volumes of apical radiolucency after the surgery were reduced by 77.7% on average at one-year follow up.

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Innes, J. F., F. McConnell, M. J. Guilliard, et al. "Observer variation in the evaluation and classification of severe central tarsal bone fractures in racing Greyhounds." Veterinary and Comparative Orthopaedics and Traumatology 24, no. 03 (2011): 215–22. http://dx.doi.org/10.3415/vcot-10-06-0085.

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SummaryObjectives: To determine observer agreement on radiographic evaluation of central tarsal bone (CTB) fractures and compare this with evaluation of the same fractures using computed tomography (CT).Methods: Radiographs and CT scans were obtained of the right tarsi from limbs of Greyhounds euthanatized after sustaining severe CTB fracture during racing. Four observers described and classified each fracture. Inter- and intra-observer agreements were calculated.Results: Inter-observer agreement was higher for assessment of fractures using CT. Several fractures assessed by radiography were mis-classified as a less severe type. Intra-observer agreement for assessment and classification of CTB fractures via radiography versus CT was variable. Overall agreement among all four observers was higher for CT than radiography. Additionally, when identifying fractures of the adjacent tarsal bones, observer agreement was higher for CT than radiography.Clinical significance: Computed tomography improved observer ability to correctly evaluate CTB fracture and detect the degree of displacement and extent of any comminution. Identification of fractures of adjacent tarsal bones was also improved when tarsi were assessed using CT. These data suggest that treatment decisions based solely on radiographic assessment of CTB fractures may not produce the expected outcome.

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Beltrán, Jorge A., Roberto A. León-Manco, and Maria Eugenia Guerrero. "Comparison of the diagnostic accuracy of cone beam computed tomography and three intraoral radiographic systems in the diagnosis of carious lesions in vitro." Journal of Oral Research 9, no. 6 (2020): 466–73. http://dx.doi.org/10.17126/joralres.2020.091.

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Objective: The objective of the study was to compare the diagnostic accuracy of cone beam computed tomography and three intraoral radiographic systems in the detection of in vitro caries lesions. Material and Methods: One hundred teeth (46 molars and 54 premolars) were evaluated, including 176 proximal surfaces and 90 occlusal surfaces, with or without dental caries lesions. Digital images of all teeth were obtained using specific intraoral radiographs, VistaScan DürrDental®phosphor-plate radiography, XIOS XG Sirona® digital sensor radiography, and CBCT I-CATTM. Observers evaluated the images for the detection of caries lesions. The teeth were clinically sectioned and stereomicroscopy served as a validation tool. The relationship of sensitivity and specificity between all systems was determined through the ROC curve using Az values. Results: The values of the area under the curve (Az) selected for the CBCT I-CATTM system were 0.89 (0.84-0.93), for conventional radiography 0.71 (0.66-0.76), digital sensor radiography 0.74 (0.70-0.78) and digital radiography with phosphor-plates 0.73 (0.69-0.77). Statistically significant differences were found between the CBCT I-CATTM system and intraoral radiographic systems (p<0.01). The sensitivity and specificity values for the CBCT I-CATTM were 0.84 and 0.93 respectively. Conclusion: CBCT has a high sensitivity and specificity compared to intraoral radiographic systems for the diagnosis of dental caries lesions in vitro.

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Kogutt, MS. "Computed radiographic imaging: use in low-dose leg length radiography." American Journal of Roentgenology 148, no. 6 (1987): 1205–6. http://dx.doi.org/10.2214/ajr.148.6.1205.

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Tohnak, S., A. J. H. Mehnert, M. Mahoney, and S. Crozier. "Synthesizing Dental Radiographs for Human Identification." Journal of Dental Research 86, no. 11 (2007): 1057–62. http://dx.doi.org/10.1177/154405910708601107.

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The task of identifying human remains based on dental comparisons of post mortem (PM) and ante mortem (AM) radiographs is labor-intensive, subjective, and has several drawbacks, including: inherently poor image quality, difficulty matching the viewing angles in PM radiographs to those taken AM, and the fact that the state of the dental remains may entirely preclude the possibility of obtaining certain types of radiographs PM. The aim of the present study was to investigate the feasibility of using radiograph-like images reconstructed from PM x-ray computed tomography (CT) data to overcome the shortcomings of conventional radiographic comparison. Algorithms for computer synthesis of panoramic, periapical, and bitewing images are presented. The algorithms were evaluated with data from clinical examinations of two persons. The results demonstrate the efficacy of the CT-based approach and that, in comparison with conventional radiographs, the synthesized images exhibit minimal geometric distortion, reduced blurring, and reduced superimposition of oral structures.

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Bagaev, K. A., D. I. Galkin, A. V. Puzanov, and A. O. Ustinov. "THE DIGITAL RADIOGRAPHY APPLICATION EXPERIENCE AT WORLDSKILLS KAZAN 2019 CHAMPIONSHIP." Kontrol'. Diagnostika, no. 258 (December 2019): 36–43. http://dx.doi.org/10.14489/td.2019.12.pp.036-043.

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The 45 World championship WORLDSKILLS KAZAN 2019 took place this summer in Kazan. The competition of welders was a part of the championship. The quality of welded joints produced by participants was inspected using digital and computed radiography. These technologies deeply reduced time of radiographic inspection. The quality of radiographs corresponded to improved techniques – class B according to ISO 17636-2 standard. Test arrangements used, resulted images and the role of digital radiography software were described inside the article. Several ways to improve productivity of testing were proposed. It was concluded that digital radiography is applicable for wide range of tasks; the preferred method is dependent on task and testing object.

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Peck, Jeffrey, Armando Villamil, Kara Fiore, Cheryl Tano, and Jessica Leasure. "Inter- and intra-observer variability of radiography and computed tomography for evaluation of Zurich cementless acetabular cup placement ex vivo." Veterinary and Comparative Orthopaedics and Traumatology 29, no. 06 (2016): 507–14. http://dx.doi.org/10.3415/vcot-16-05-0068.

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SummaryObjective: To evaluate the inter- and intra-observer variability in measurement of the angle of lateral opening (ALO) and version angle measurement using digital radiography and computed tomography (CT).Methods: Each hemipelvis was implanted with a cementless acetabular cup. Ventrodorsal and mediolateral radiographs were made of each pelvis, followed by CT imaging. After removal of the first cup, the pelves were implanted with an acetabular cup in the contra-lateral acetabulum and imaging was repeated. Three surgeons measured the ALO and version angles three times for each cup from the mediolateral radiographic projection. The same measurements were made using three-dimensional multiplanar reconstructions from CT images. Two anatomical axes were used to measure pelvic inclination in the sagittal plane, resulting in six measurements per cup. Two-way repeated measures analysis of variance evaluated inter- and intra-observer repeatability for radiographic and CT-based measurements.Results: Version angle based on radio-graphic measurement did not differ within surgeons (p = 0.433), but differed between surgeons (p <0.001). Radiographic measurement of ALO differed within surgeons (p = 0.006) but not between surgeons (p = 0.989). The ALO and version angle measured on CT images did not differ with or between surgeons.Clinical significance: Assessment of inter-and intra-observer measurement of ALO and version angle was more reproducible using CT images than conventional mediolateral radiography for a Zurich cementless acetabular cup.

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Gilley, Emily, Sameer Puri, Krystle Hearns, Andrew Weiland, and Michelle Carlson. "Importance of Computed Tomography in Determining Displacement in Scaphoid Fractures." Journal of Wrist Surgery 07, no. 01 (2017): 038–42. http://dx.doi.org/10.1055/s-0037-1604136.

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Background Displaced scaphoid fractures have a relatively high rate of nonunion. Detection of displacement is vital in limiting the risk of nonunion when treating scaphoid fractures. Questions/Purpose We evaluated the ability to diagnose displacement on radiographs and computed tomography (CT), hypothesizing that displacement is underestimated in assessing scaphoid fracture by radiograph compared with CT. Materials and Methods Thirty-five preoperative radiographs and CT scans of acute scaphoid fractures were evaluated by two blinded observers. Displacement and angular deformity were measured, and the fracture was judged as displaced or nondisplaced. Scapholunate, radiolunate, and intrascaphoid angles were measured. Radiograph and CT measurements between nondisplaced and displaced fractures were compared. Intraobserver reliability was measured. Results Reader 1 identified 12 fractures as nondisplaced on radiograph, but displaced on CT (34%). Reader 2 identified 9 fractures as nondisplaced on radiograph, but displaced on CT (26%). For displaced fractures, the mean intrascaphoid angle was over three times greater when measured on CT than on radiograph (56 vs. 16 degrees). Scapholunate angle >65 degrees and radiolunate angle >16 degrees were significantly associated with displacement on CT. Interobserver reliability for diagnosing displacement was perfect on CT but less reliable on radiograph. Conclusion Scaphoid fracture displacement on CT was identified in 26 to 34% of fractures that were nondisplaced on radiograph, confirming that radiographic evaluation alone underestimates displacement. These results underscore the importance of CT scan in determining displacement and angular deformity when evaluating scaphoid fractures, as it may alter the decision on treatment and surgical approach to the fracture. We recommend considering CT scan to evaluate all scaphoid fractures. Level of Evidence Level III.

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Ishida, Etsuko, Kenichirou Yasui, Akiyoshi Otsuka, et al. "Evaluation of X-ray Spectra and Radiographic Contrast in Computed Radiography." Japanese Journal of Radiological Technology 54, no. 1 (1998): 85. http://dx.doi.org/10.6009/jjrt.kj00001351755.

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Wennemuth, Jan, Bernd Tellhelm, Nele Eley, and Kerstin von Pückler. "Computed Tomography Enhances Diagnostic Accuracy in Challenging Medial Coronoid Disease Cases: An Imaging Study in Dog Breeding Appeal Cases." Veterinary and Comparative Orthopaedics and Traumatology 33, no. 05 (2020): 356–62. http://dx.doi.org/10.1055/s-0040-1714299.

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Abstract Objectives The aim of this study was to determine the radiographic sensitivity in detecting medial coronoid disease (MCD), using computed tomography (CT) as reference in dogs presented for an official second opinion, and to compare the medial coronoid process (MCP) in fragmented and fissured MCP as well as those unaffected by MCD. Materials and Methods The data of dogs, presented for official second opinion radiographs and CT, were reviewed by three board-certified observers and in accordance with the International Elbow Working Group guidelines regarding MCD. Radiographic delineation, radiopacity and Hounsfield Units (HU) of the MCP were recorded additionally and the correlation between radiography and CT was investigated. Results Sensitivity and specificity of radiography compared with CT yielded values of 83.6% for the former and 83.5% for the latter. False-negative grading in radiography correlated significantly (p = 0.0001) with a present fissure line in CT. The mean delineation (p = 0.03) and mean HU of fragmented MCP (p = 0.0045) were significantly reduced compared with fissured MCP and no significant differences in measured HU for fissured MCP were detected in comparison to elbows unaffected by MCD. Conclusion The results of the present study show substantial agreement between radiography and CT in second opinion cases. However, sensitivity is reduced compared with not preselected cases. A present fissure line in CT was significantly associated with a false-negative grading in radiography. Therefore, CT imaging of the elbows is strongly recommended in cases of appeal.

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Pham, Khoa Van. "A Comparison of Cone Beam Computed Tomography and Periapical Digital Radiography for Evaluation of Root Canal Preparation." Applied Sciences 11, no. 14 (2021): 6599. http://dx.doi.org/10.3390/app11146599.

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The aim of the present study is to compare cone beam computed tomography and periapical digital radiography for the evaluation of root canal preparation. Nine extracted human molars were used in this study. Following access cavity preparation, mesio-buccal roots of maxillary and mesial roots of mandibular molars were prepared and the remaining roots were cut off. Three amalgam cavities were prepared on the coronal part of the teeth and were filled with amalgam to be used as landmarks. Specimens were scanned using cone-beam computed tomography and periapical digital radiograph images were obtained before and after root canal preparation. WaveOne Gold Primary was used for root canal preparation to full working length. Specimens were then scanned using CBCT and a periapical radiograph for the after-instrumentation images. The transportation and centering ratio were measured and calculated on the CBCT and periapical radiographic images. The Bland–Altman method was used for detecting the bias in the evaluation of agreement between the two methods’ measurements. There was agreement between the two methods’ measurements using CBCT scans and periapical digital radiographic images in the evaluation of transportation and centering ratio parameters. The two methods could be used interchangeably in measurements of transportation and calculating the centering ratio.

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Kurniawati, Dartini, Ary. "Differences of Radiographic Quality and Exposure Index on Computed Radiography Using Imaging Plate with Different Reading Time Period." Journal of Medical Science And clinical Research 05, no. 06 (2017): 23664–69. http://dx.doi.org/10.18535/jmscr/v5i6.143.

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Cho, Min-Jeong, Loa L. Borchert, and Alex A. Kane. "Diagnostic Yield of Routine Skull Radiographs in Infants with Deformational Plagiocephaly." Cleft Palate-Craniofacial Journal 54, no. 5 (2017): 497–501. http://dx.doi.org/10.1597/15-277.

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Objective Differentiating synostotic and nonsynostotic plagiocephaly can be challenging, and many providers routinely obtain screening skull radiographs when evaluating an infant with plagiocephaly. However, the diagnostic yield of radiographs has not been studied in this clinical setting. Design This study was a retrospective chart review. Setting The study took place in a tertiary care center. Patients We retrospectively reviewed the records of all patients referred to Children's Medical Center (Dallas, TX) between the years 2010 to 2012 with a diagnosis of plagiocephaly. After an initial evaluation, skull radiographs were obtained to rule out craniosynostosis. We reviewed clinical and demographic data and radiographic findings to determine the diagnostic yield of routine screening radiographs in infants presenting with plagiocephaly. Results There were 1219 patients in total, and 1213 of these patients received screening four-view conventional skull radiographs. Six had computed tomography without prior radiographs. Of the patients in the skull radiograph group, 24% (289 of 1213) had abnormal radiographic findings, and 7.6% of this group (22 of 289) had findings that were indicative of craniosynostosis. Of these 22 patients, 12 obtained follow-up studies, and only three patients (0.2% of skull group) had true craniosynostosis. In comparison, 50% (three of six) in the group of patients who underwent computed tomography without prior conventional screening radiographs had true craniosynostosis. Conclusions Routine screening skull radiographs have a low diagnostic yield in differentiating between synostotic and nonsynostotic plagiocephaly in patients presenting to a tertiary care deformational plagiocephaly clinic. Considering the costs and radiation exposure, the benefit of the routine use of skull radiographs in patients with deformational plagiocephaly is questionable.

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Ebraheim, Nabil A., Ashok Biyani, Thomas Padanilam, and Kevin Paley. "A Pitfall of Coronal Computed Tomographic Imaging in Evaluation of Calcaneal Fractures." Foot & Ankle International 17, no. 8 (1996): 503–5. http://dx.doi.org/10.1177/107110079601700813.

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Computed tomographic (CT) coronal images of the posterior talocalcaneal joint were compared with lateral radiographic views and intraoperative findings in 35 patients with 36 intra-articular calcaneal fractures. The severity of articular incongruity and rotational displacement of the posterior facet fragment were not well appreciated in coronal CT images of nine patients, although Bohler and Gissane angles were significantly decreased in lateral radiographs. This disparity between the radiographic and coronal CT scans can be explained by the intraoperative finding of rotation of the fractured central or lateral portion of the convex posterior calcaneal facet along a horizontal axis in the coronal plane.

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Murakami, M., H. Watanabe, and H. Nakata. "Phantom Gastric Mucosa for Evaluating Computed Radiography in Double-Contrast Upper Gastrointestinal Examinations." Acta Radiologica 37, no. 1P1 (1996): 204–7. http://dx.doi.org/10.1177/02841851960371p142.

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Purpose: To test the clinical usefulness of computed radiography (CR) with a storage phosphor plate in upper gastrointestinal radiographic examinations, a newly devised phantom gastric mucosa was used. Material and Methods: Simulated small elevated and depressed lesions were created on a phantom gastric mucosa made from a styrofoam “plate”. Twenty-four sets of each CR and screen-film radiographs (SR) were obtained using phototimed exposures. Receiver operating characteristic (ROC) study and visual ranking using these images were performed. Results: There was no significant difference between the ROC curves of CR and SR. By visual ranking, CR was equal to or better than SR in most cases. In no case was SR definitely superior to CR. Conclusion: CR can be safely applied in upper gastrointestinal roentgenologic examinations.

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Akhbari, Bardiya, Kalpit N. Shah, Amy M. Morton, et al. "Total Wrist Arthroplasty Alignment and Its Potential Association with Clinical Outcomes." Journal of Wrist Surgery 10, no. 04 (2021): 308–15. http://dx.doi.org/10.1055/s-0041-1725172.

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Abstract Purpose There is a lack of quantitative research that describes the alignment and, more importantly, the effects of malalignment on total wrist arthroplasty (TWA). The main goal of this pilot study was to assess the alignment of TWA components in radiographic images and compare them with measures computed by three-dimensional analysis. Using these measures, we then determined if malalignment is associated with range of motion (ROM) or clinical outcomes (PRWHE, PROMIS, QuickDash, and grip strength). Methods Six osteoarthritic patients with a single type of TWA were recruited. Radiographic images, computed tomography images, and clinical outcomes of the wrists were recorded. Using posteroanterior and lateral radiographs, alignment measurements were defined for the radial and carpal components. Radiographic measurements were validated with models reconstructed from computed tomography images using Bland–Altman analysis. Biplanar videoradiography (<1mm and <1 degree accuracy) was used to capture and compute ROM of the TWA components. Linear regression assessed the associations between alignment and outcomes. Results Radiographic measures had a 95% limit-of-agreement (mean difference ± 1.96 × SD) of 3 degrees and 3mm with three-dimensional values, except for the measures of the carpal component in the lateral view. In our small cohort, wrist flexion–extension and radial–ulnar deviation were correlated with volar–dorsal tilt and volar–dorsal offset of the radial component and demonstrated a ROM increase of 3.7 and 1.6 degrees per degree increase in volar tilt, and 10.8 and 4.2 degrees per every millimeter increase in volar offset. The carpal component's higher volar tilt was also associated with improvements in patient-reported pain. Conclusions We determined metrics describing the alignment of TWA, and found the volar tilt and volar offset of the radial component could potentially influence the replaced wrist's ROM. Clinical Relevance TWA component alignment can be measured reliably in radiographs, and may be associated with clinical outcomes. Future studies must evaluate its role in a larger cohort.

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Moore, C. S., G. Avery, S. Balcam, et al. "Use of a digitally reconstructed radiograph-based computer simulation for the optimisation of chest radiographic techniques for computed radiography imaging systems." British Journal of Radiology 85, no. 1017 (2012): e630-e639. http://dx.doi.org/10.1259/bjr/47377285.

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Reddy, Michael S., and I.-Chung Wang. "Radiographic Determinants of Implant Performance." Advances in Dental Research 13, no. 1 (1999): 136–45. http://dx.doi.org/10.1177/08959374990130010301.

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This paper reviews and compares the strengths and weaknesses of radiographic techniques including periapical, occlusal, panoramic, direct digital, motion tomography, and computed tomography. Practical considerations for each method, including availability and accessibility, are discussed. To date, digital subtraction radiography is the most versatile and sensitive method for measuring boss loss. It can detect both bone height and bone mass changes on root-form or blade-form dental implants. Criteria for implant success have changed substantially over the past two decades. In clinical trials of dental implants, the outcomes require certain radiographic analyses to address the hypothesis or clinical question adequately. Radiographic methods best suited to the objective assessment of implant performance and hypothesis were reviewed.

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Bougatef, Hana, Eya Moussaoui, Ines Kallel, Mahmoud Smaoui, Lamia Oualha, and Nabiha Douki. "Periostitis Ossificans: Report of Two Cases Resolved with Endodontic Treatment." Case Reports in Dentistry 2020 (November 24, 2020): 1–9. http://dx.doi.org/10.1155/2020/8876268.

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Periostitis ossificans is a chronic disease characterized by an ossifying periostitis, occurring in children and young adults, commonly as a reaction to a mild infection or irritation. It is also characterized by the presence of lamellae of newly formed periosteal bone outside the cortex, giving the characteristic radiographic appearance of “onion skin.” Aim. The aim of this paper was to present the clinical and radiographic findings, as well as the postoperative follow-up of two cases diagnosed with periostitis ossificans of dental origin, and to discuss the differential diagnosis and treatment modalities. Case Reports. In the first case, a 16-year-old adolescent was referred for a persistent mandibular swelling. Intraoral examination showed two sinus tracts in relation to the carious necrotic left mandibular first molar. The periapical radiograph showed a periapical lesion in relation to the two root canals of the left mandibular first molar. Occlusal radiographs revealed the “onion skin” bone formation aspect. In the second case, a 10-year-old girl presented to our department with a slightly painful mandibular swelling. The periapical radiograph showed a periapical lesion in relation to both the mesial and distal roots of the carious necrotic right mandibular first molar. Cone beam computed tomography (CBCT) showed a subperiosteal bone formation with an “onion skin” aspect. Diagnosis of periostitis ossificans in the two cases was confirmed and the lesion was resolved by simply an endodontic treatment. Conclusion. Specific attention should be given to clinical and radiographic exploration in case of children with mandibular swelling. As osteosarcoma can be misdiagnosed, additional examinations, such as computed tomography, can be useful in differential diagnosis and in searching malignancy signs.

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Sinitsyna, Anastasiya V., Pavel V. Gavrilov, Alexandr V. Sinitsyn, Svetlana V. Michailova, Ksenia V. Pribitok, and Elena V. Sinelnikova. "Evaluation of efficiency of different methods of radiation diagnosis in the detection of tuberculosis in children." Pediatrician (St. Petersburg) 8, no. 3 (2017): 94–100. http://dx.doi.org/10.17816/ped8394-100.

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An evaluation of the effectiveness of the method of computer tomography in 77 children with suspicion of tuberculosis of the intrathoracic lymph nodes and positive test with recombinant tuberculosis allergen (Diaskintest). Ultrasound diagnosis is conducted with 60 children with a negative test with recombinant tuberculosis allergen (Diaskintest), with indirect signs of increase of intrathoracic lymph nodes, left tracheobronchial region according to traditional radiographic studies (plain radiography, linear tomography). In the first group of the frequency change detection by computed tomography in a group of patients, where it was revealed the changes on the survey radiograph, was almost 2 times more than in the group of patients with normal radiograph. There is a high rate of detection of changes at computed tomography in children with normal x-ray picture according to the classical methods. These changes were regarded as possibly associated with an active tuberculous process and required additional evaluation of clinical and laboratory data physician TB. In 32% of cases, the changes revealed by traditional x-ray, computed tomography has not been confirmed. When conducting sonography in the second group in the left tracheobronchial region was visualized left lobe of the thymus in 100%. Specific changes in the lymph nodes and the pleura was not determined by ultrasound. Thus the thymus simulated increase in intrathoracic lymph nodes. In the evaluation of clinical and laboratory data physician TB specialist, diagnosis of tuberculosis in this group, was not confirmed.

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Wilkie, Joel R., Maryellen L. Giger, Michael R. Chinander, et al. "Comparison of radiographic texture analysis from computed radiography and bone densitometry systems." Medical Physics 31, no. 4 (2004): 882–91. http://dx.doi.org/10.1118/1.1650529.

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Kawahara, Emiko, and Takashi Sakurai. "Spatial frequency components of normal radiographic anatomical features on intraoral computed radiography." Oral Radiology 11, no. 2 (1995): 37–46. http://dx.doi.org/10.1007/bf02347978.

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Hwang, TS, YM Yoon, SA Noh, DI Jung, SC Yeon, and HC Lee. "Pneumatosis coli in a dog – a serial radiographic study: a case report." Veterinární Medicína 61, No. 7 (2016): 404–8. http://dx.doi.org/10.17221/255/2015-vetmed.

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A 12-year-old intact female poodle was presented with a history of an acute episode of tenesmus and passage of ribbon-shaped stools. Anaemia, leucocytosis, hypoalbuminaemia, hyperglycaemia, and elevated ALP were found. Faecal floatation and wet mount preparation were negative for parasites. Anaerobic faecal culture resulted in a heavy growth of Clostridium. Survey abdominal radiographs revealed extensive intramural emphysema of colon and rectum. Ultrasonography of the abdomen revealed bright echoes within the layers of the colon wall, confirming the accumulation of intramural gas. Abdominal computed tomography revealed extraluminal gas tracking along the colon and the rectum. Based on the radiographic, ultrasonographic, and computed tomographic findings, the present case was diagnosed as pneumatosis coli with an underlying cause of bacterial overgrowth. The patient was treated with antibiotics for seventeen days. Clinical signs were resolved after three days of treatment. Decreased intramural gas accumulation was evident during radiography of the abdomen performed at fourteen days after the initial evaluation. Therefore, pneumatosis coli should be considered when a dog is presented with clinical signs of colitis.

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Choi, Jun Young, and Jin Soo Suh. "Ten-Year Retrospective Study of Symptomatic Naviculo-Medial Cuneiform Coalition in 18 Young Adults: Hidden Features Observed on Computed Tomography." Foot & Ankle Orthopaedics 4, no. 4 (2019): 2473011419S0014. http://dx.doi.org/10.1177/2473011419s00144.

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Category: Midfoot/Forefoot Introduction/Purpose: To the best of our knowledge, there are no previous reports comparing the radiographic findings to CT findings for symptomatic naviculo-medial cuneiform (NC) coalition. The purpose of this study was to demonstrate and compare the features of symptomatic naviculo-medial cuneiform coalition between radiography and computed tomography (CT). Methods: We retrospectively reviewed the radiographic and CT findings of 25 symptomatic naviculo-medial cuneiform coalition cases in 18 patients. The existence of a large pit (depth >3 mm), irregular articular surface, joint space narrowing, dorsal bony spur, subchondral sclerosis, multiple subchondral bony cysts, and intra-articular loose bodies were evaluated on radiograph or CT. The size of the largest subchondral bony cyst was also measured using CT. Results: The proportion of large pit observed on radiograph (52.0%) was significantly different (P = .001) from that on CT (72.0%). Similarly, intra-articular loose bodies were observed more frequently on CT (P = .001). The mean size of the largest subchondral bony cyst on CT was 4.25 mm. Conclusion: While evaluating CT in patients with naviculo-medial cuneiform coalition, physicians should focus on detecting a large pit and intra-articular loose bodies since differences in these features were frequently observed between radiograph and CT, with these findings being more evident on CT. We believe that a large subchondral bony cyst could also be related to the symptoms of naviculo-medial cuneiform coalition.

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Balasundaram, Ashok, Punit Shah, Michael M. Hoen, et al. "Comparison of Cone-Beam Computed Tomography and Periapical Radiography in Predicting Treatment Decision for Periapical Lesions: A Clinical Study." International Journal of Dentistry 2012 (2012): 1–8. http://dx.doi.org/10.1155/2012/920815.

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Objectives. To compare the ability of endodontists to determine the size of apical pathological lesions and select the most appropriate choice of treatment based on lesions’ projected image characteristics using 2 D and 3 D images.Study Design. Twenty-four subjects were selected. Radiographic examination of symptomatic study teeth with an intraoral periapical radiograph revealed periapical lesions equal to or greater than 3 mm in the greatest diameter. Cone-beam Computed tomography (CBCT) images were made of the involved teeth after the intraoral periapical radiograph confirmed the size of lesion to be equal to greater than 3 mm. Six observers (endodontists) viewed both the periapical and CBCT images. Upon viewing each of the images from the two imaging modalities, observers (1) measured lesion size and (2) made decisions on treatment based on each radiograph. Chi-square test was used to look for differences in the choice of treatment among observers.Results. No significant difference was noted in the treatment plan selected by observers using the two modalities (χ2(3)=.036,P>0.05).Conclusion. Lesion size and choice of treatment of periapical lesions based on CBCT radiographs do not change significantly from those made on the basis of 2 D radiographs.

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SABHARWAL, SANJEEV, CAIXIA ZHAO, JOHN J. MCKEON, EMILY MCCLEMENS, MICHELE EDGAR, and FRED BEHRENS. "COMPUTED RADIOGRAPHIC MEASUREMENT OF LIMB-LENGTH DISCREPANCY." Journal of Bone and Joint Surgery-American Volume 88, no. 10 (2006): 2243–51. http://dx.doi.org/10.2106/00004623-200610000-00018.

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NEWELL, JOHN D., GEORGE SEELEY, ROBERTA M. HAGAMAN, et al. "Computed Radiographic Evaluation of Simulated Pulmonary Nodules." Investigative Radiology 23, no. 4 (1988): 267–70. http://dx.doi.org/10.1097/00004424-198804000-00005.

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Dos Santos Barroco, Rui, Bruno Rodrigues de Miranda, Leticia Zaccaria Prates de Oliveira, Mahmoud Beerens Abdul Ghani Abdul Ghani, Antonio Candido de Paula Neto, and Douglas Hideki Ikeuti. "PO 18271 - New method for the radiographic evaluation of metatarsal rotation in hallux valgus." Scientific Journal of the Foot & Ankle 13, Supl 1 (2019): 60S. http://dx.doi.org/10.30795/scijfootankle.2019.v13.1055.

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Introduction: Hallux valgus involves, in addition to I/II intermetatarsal angle deviation, a rotational deformity of the first metatarsal bone and its sesamoids in relation to the ground. The correction of the rotation is the objective of new and recently developed surgical techniques. Objective: To describe a radiographic method that can help predict changes resulting from metatarsal rotational correction and facilitate surgical planning. Methods: We acquired radiographs in a weight-bearing anteroposterior position in patients with flexible hallux valgus while asking the patient to actively extend the toes. We compared the weight-bearing radiographs with and without the toe extension maneuver. In addition to radiography, we performed computed tomography (CT) of the nonweight-bearing active toe extension maneuver using a support platform. To measure the changes, we used the classification of Coughlin and Smith et al. Results: We observed clinical and radiographic correction, both angular and rotational, by measuring the intermetatarsal angle and sesamoid position. The changes were confirmed by CT, which showed improvement in the intermetatarsal angle, sesamoid position and metatarsophalangeal range. Discussion: The toe extension maneuver was described as a peroneus longus tendon activation test by Klemola et al., who used it to demonstrate rotational clinical correction of hallux valgus. Here, we described a radiographic method based on this principle to observe the correction power of and factors involved in metatarsal derotation using a preoperative radiographic technique. Conclusion: The method clearly demonstrated the capacity for the correction of preoperative hallux derotation in various planes, thus helping to predict the clinical, angular and rotational outcomes of surgical treatment.

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Lu, Jike, Nabil A. Ebraheim, Martin Skie, Brian Porshinsky, and Richard A. Yeasting. "Radiographic and Computed Tomographic Evaluation of Lisfranc Dislocation: A Cadaver Study." Foot & Ankle International 18, no. 6 (1997): 351–55. http://dx.doi.org/10.1177/107110079701800608.

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Six cadaver feet were used for radiological and computed tomographic (CT) evaluation. The tarsometatarsal joints of each specimen were displaced dorsolaterally in successive 1-mm increments. None of the 1-mm and two thirds of the 2-mm dorsolateral Lisfranc dislocations could be visualized on routine radiographs; they could all be noted on CT scans. There was good assessment on CT scan for the extent of the minor lesions that are normally obscured by overlapping projection in routine radiographs. A Lisfranc injury that appears undisplaced on radiographs or acceptable after closed reduction may still have an unpredictable outcome because of the presence of an occult joint subluxation. CT scanning is more sensitive than radiography for detecting the minor amounts of Lisfranc displacement. If there is any doubt on the radiographs, a CT scan should be performed. The early diagnosis and treatment of Lisfranc injuries may minimize development of post-traumatic degenerative arthritis.

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Lorenzoni, Diego Coelho, Ana Carolina Cuzzuol Fracalossi, Viviane Carlin, Daniel Araki Ribeiro, and Eduardo Franzotti Sant'Anna. "Mutagenicity and cytotoxicity in patients submitted to ionizing radiation." Angle Orthodontist 83, no. 1 (2012): 104–9. http://dx.doi.org/10.2319/013112-88.1.

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Abstract Objectives: To evaluate and compare mutagenicity (micronucleus) and cytotoxicity (karyorrhexis, pyknosis, and karyolysis) in exfoliated buccal mucosa cells of children following cone beam computed tomography (CBCT) or conventional radiograph exposure necessary for orthodontic planning. Materials and Methods: A total of 49 healthy children were submitted to CBCT or a conventional orthodontic radiographic protocol; they were divided into two groups based on exam: CBCT (n = 24) and Radiographic Set (n = 25) groups. The micronucleus test in the exfoliated buccal mucosa cells was applied. Results: There was not a statistically significant difference (P &gt; .05) found between the number of micronucleated buccal mucosa cells (MNC) before and after exposure to radiation in either group, showing that neither group experienced a mutagenic effect. However, radiation did cause other nuclear alterations closely related to cytotoxicity, including karyorrhexis, pyknosis, and karyolysis, in both groups (P &lt; .05). The CBCT group presented a greater increase in cell death than was noted in the Radiographic Set group (P &lt; .044). Conclusion: According to the micronucleus test, mutagenicity was not induced by the CBCT or the conventional radiographs, but cytotoxicity was verified after these exams, especially after CBCT. That might have happened once the CBCT group received a greater radiation dose than the Radiographic Set group as a result of the protocols used in orthodontic planning for this study.

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Higashida, Yoshiharu, Nobuyuki Moribe, Yukinori Hirata, et al. "Computed radiography utilizing laser-stimulated luminescence: Detectability of simulated low-contrast radiographic objects." Computerized Medical Imaging and Graphics 12, no. 3 (1988): 137–45. http://dx.doi.org/10.1016/0895-6111(88)90025-0.

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Nilsson, U., U. Nyman, and M. Nilsson. "Teletransmission of Radiographic Images." Acta Radiologica. Diagnosis 27, no. 3 (1986): 357–60. http://dx.doi.org/10.1177/028418518602700318.

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A digital system for transmission of images over telephone lines using a 256×256×6 bits matrix provided for communication between a county hospital and a university hospital is presented. During a three-month period radiologic diagnostic problems encountered in 62 patients (computed tomography in 46 and conventional radiography in 16) were referred by transmitting selected images from each examination. Transmission of computed tomograms was performed without significant degradation of image quality and there was no loss of diagnostic information. Deterioration of image quality was noticed when conventional films especially those of the chest, were digitized and transmitted, though in no instance were they non-diagnostic. The consultations gave valuable information to the transmitting radiologist in approximately 50 per cent of the cases. Review by the consulted radiologists of all original films in each of the examinations 6 months later did not improve the diagnostic results. Thus, a few carefully selected images, digitized and transmitted over telephone lines, may be sufficient for adequate consultation. References

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Stoica, Alexandra Mihaela, Monica Monea, Ramona Vlad, Dragos Dan Sita, and Mircea Buruian. "Cone Beam Computed Tomography Used in the Assessment of the Alveolar Bone in Periodontitis." European Scientific Journal, ESJ 12, no. 27 (2016): 47. http://dx.doi.org/10.19044/esj.2016.v12n27p47.

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Objectives: The aim of our study was to highlight the advantages of using Cone Beam Computed Tomography in the study of the extent of the alveolar bone loss, compared to the conventional intraoral radiography and to prove the boon of the CBCT scans for establishing the correct periodontal diagnosis. Material and methods: A total of 16 patients with age between 35-55 years old, and a minimum of 8 teeth per dental arcade, presenting peridontal clinical symptomatology were selected. We used a custom periodontal chart that included the measuring of the gingival recession and the pocket depth in 6 points for 16 teeth, 8 maxillary teeth and 8 mandibulary teeth in all cases. For the radiographic evaluation we used CBCT imaging and intraoral radiography. Results: CBCT scans offers the possibilities of measuring with accuracy the alveolar bone loss on mesial, distal vestibular and oral sides. It provides images with the exact position of the bone and also the expediency to assess the correct diagnosis. Retroalveolar radiography offers just a hint of the possible position of the alveaolar bone in all cases the anatomical details were offered by CBCT. Conclusions: A correct periodontal diagnosis using conventional radiography is not possible because of the superimposition of the anatomical structures. The importance of CBCT imaging is no longer disputed, at the present time it is the best radiographic investigation available.

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Liao, Che-Wei, Chia-Jui Hsieh, Heng-Li Huang, et al. "PROTOTYPE OF A 2.5D PERIAPICAL RADIOGRAPHY SYSTEM USING AN INTRAORAL COMPUTED TOMOSYNTHESIS APPROACH." Biomedical Engineering: Applications, Basis and Communications 30, no. 01 (2018): 1850004. http://dx.doi.org/10.4015/s1016237218500047.

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Digital periapical radiography is widely used in clinical dentistry because the technique is relatively simple and inexpensive. However, the main drawback of periapical radiography is that it represents a three-dimensional object in a two-dimensional film due to its inherent projection technique. The objective of this study was to develop a prototype intraoral computed tomosynthesis system, which can provide quasi-three-dimensional (so-called 2.5D) images. We developed a prototype intraoral computed tomosynthesis machine. Regular digital periapical radiography, computed tomosynthesis scanning, and computed tomography scanning of a human central incisor were performed. Then, reconstruction images obtained using computed tomosynthesis and computed tomography approaches were quantitatively evaluated using the signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR). From the experimental results, compared with periapical radiographic images, reconstruction images obtained using the computed tomosynthesis approach revealed detailed microstructures in different depth sections. In addition, the SNR and CNR of reconstruction images obtained using the computed tomography approach was better than those of the images obtained using the computed tomosynthesis approach. However, the differences could not be clearly identified by the naked eye. The preliminary experimental results indicate that an intraoral computed tomosynthesis system may be useful for clinical dental diagnosis.

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Shekhar, Vijay, and K. Shashikala. "Cone Beam Computed Tomography Evaluation of the Periapical Status of Nonvital Tooth with Open Apex Obturated with Mineral Trioxide Aggregate: A Case Report." Case Reports in Dentistry 2013 (2013): 1–6. http://dx.doi.org/10.1155/2013/714585.

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Management of a tooth with open apex is a challenge to the dental practitioners. Evaluation of the periapical healing is required in such cases by radiographic techniques. The objective of this paper was to assess the healing of a periapical lesion in a non-vital tooth with open apex treated with mineral trioxide aggregate (MTA) obturation using cone beam computed tomography (CBCT). The endodontic treatment of a fractured non-vital discolored maxillary left lateral incisor with an open apex was done with MTA obturation. The clinical and radiographic followup done regularly showed that the tooth was clinically asymptomatic and that the size of the periapical lesion observed by intraoral periapical (IOPA) radiographs and CBCT was decreased remarkably after two years. CBCT and IOPA radiographs were found to be useful radiographic tools to assess the healing of a large periapical lesion in a non-vital tooth with open apex managed by MTA obturation.

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Griffen, Margaret M., Eric R. Frykberg, Andrew J. Kerwin, et al. "Radiographic Clearance of Blunt Cervical Spine Injury: Plain Radiograph or Computed Tomography Scan?" Journal of Trauma: Injury, Infection, and Critical Care 55, no. 2 (2003): 222–27. http://dx.doi.org/10.1097/01.ta.0000083332.93868.e2.

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Alhamdu, Moi, Ukeme Pius, and Joseph Dlama. "Assessment of the rationale behind the concurrent practice of conventional and computed radiography in two federal hospitals in Maiduguri, Borno state." Journal of applied health sciences 5, no. 1 (2019): 121–28. http://dx.doi.org/10.24141/1/5/1/12.

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Objectives: To determine the rationale behind the concurrent practice of conventional and computed radiography systems in two federal hospitals and to determine the advantages and disadvantages Methodology: Fifty-one questionnaires comprising 22 items and divided into four sections were distributed to radiologists, radiographers and intern radiographers. Analysis was carried out using the Statistical package for Social Sciences (SPSS) version 19.0. Chi-square was used to test the hypothesis with the significance level of p&lt;0.05. Results: Most respondents (68.6%, n=35) agreed that the incidence of preference of one radiographic system over the other by referring physicians was the main rationale for the concurrent practice of both radiographic systems in their departments. Majority (88.2%, n=45) agreed that the main advantage of the concurrent practice of both radiographic systems was that each radiographic system could serve as backup in the event of breakdown of one system. Majority (66.7%, n=34) agreed that the main disadvantage of the concurrent practice of both radiographic systems was that it was expensive to practice and maintain both systems concurrently. Chi square value was statistically significant p&lt;0.005. Conclusion: The major rationale was preference by referring physicians. The study revealed the advantages of the concurrent practice of both radiographic systems and the provision of a backup system in the event of break down. The disadvantage of the concurrent practice of both radiographic systems is the cost of maintenance and the incidence of undue preference of one radiographic system over another. Acknowledgement: we acknowledge the management and staff of Radiology departments of the two hospitals where the study took place.

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Journal articles on the topic 'Computed radiographic'

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