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Journal articles on the topic 'Image reconstruction. Three-dimensional imaging. Diagnostic imaging'

Author: Grafiati

Published: 4 June 2021

Last updated: 11 February 2022

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1

Boag, A. H., L. A. Kennedy, and M. J. Miller. "Three-Dimensional Microscopic Image Reconstruction of Prostatic Adenocarcinoma." Archives of Pathology & Laboratory Medicine 125, no. 4 (2001): 562–66. http://dx.doi.org/10.5858/2001-125-0562-tdmiro.

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Abstract Context.—Routine microscopy provides only a 2-dimensional view of the complex 3-dimensional structure that makes up human tissue. Three-dimensional microscopic image reconstruction has not been described previously for prostate cancer. Objectives.—To develop a simple method of computerized 3-dimensional image reconstruction and to demonstrate its applicability to the study of prostatic adenocarcinoma. Methods.—Serial sections were cut from archival paraffin-embedded prostate specimens, immunostained using antikeratin CAM5.2, and digitally imaged. Computer image–rendering software was

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JAMES, S. E., R. RICHARDS, and D. A. McGROUTHER. "Three-Dimensional CT Imaging of the Wrist." Journal of Hand Surgery 17, no. 5 (1992): 504–6. http://dx.doi.org/10.1016/s0266-7681(05)80230-x.

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Three-dimensional computerized tomography provides a new approach to radiological imaging. Raw data from sequential two-dimensional scans have been reconstructed as a three-dimensional model of the carpal area using the Medical Graphics and Imaging Workstation. This study demonstrates the anatomical accuracy and potential diagnostic qualities of a reconstruction of the carpus using this system. The advantages, pitfalls and suggested applications of this technique of carpal imaging are discussed. Three-dimensional imaging is shown to provide a great deal of information which cannot be viewed on

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Wang, Lijuan, and Gaoyuan Cui. "The Value of Computed Tomography Three-Dimensional Imaging Technology in the Diagnosis and Treatment of Sports Knee Ligament Strain." Journal of Medical Imaging and Health Informatics 10, no. 9 (2020): 2067–72. http://dx.doi.org/10.1166/jmihi.2020.3123.

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Objective: To improve the efficiency and accuracy of the diagnosis and treatment of sports knee ligament strain, the application value of computerized tomography (CT) three-dimensional (3D) imaging technology in the diagnosis and treatment of sports knee ligament strain is studied. Methods: This study proposes a method for CT 3D image reconstruction based on the model clustering algorithm. First, the knee joint CT images of research objects are preprocessed. Second, based on the preprocessing, the healthy adult male knee ligament distribution structure map is used as a reference model. The mod

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Du, Xu. "Application of CT Three-Dimensional Image in the Diagnostic Evaluation and Treatment of Sports Knee Ligament Strain." Journal of Medical Imaging and Health Informatics 11, no. 1 (2021): 276–81. http://dx.doi.org/10.1166/jmihi.2021.3503.

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Objective: This paper explores the value of CT three-dimensional reconstruction image technology in the diagnosis and treatment of anterior cruciate ligament injury of the knee joint. Methods: The paper selected March 2017–April 2018 to treat and diagnose the reconstructed images in our hospital and imported them into MIMICSl0.01 for 3D reconstruction of the knee joint, and segmented and isolated the anterior cruciate ligament model. The lengths of the anterior and posterior outer edges of the anterior cruciate ligament separated at 0° and 90° were measured respectively: the angles between the

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He, Ying. "Computer Three-Dimensional Positioning and Reconstruction of Continuous Slice Images of Biological Tissues." Journal of Medical Imaging and Health Informatics 10, no. 2 (2020): 469–76. http://dx.doi.org/10.1166/jmihi.2020.2895.

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The physiological and pathological changes of organisms will have certain effects on the morphology of tissues and organs. Conversely, the morphological changes of tissues and organs can also reflect the physiological and pathological changes of organisms to some extent. The bio-tissue slice can provide people with two-dimensional information of the tissue structure on a certain section. In this paper, the image registration algorithm based on mutual information is used to register the slice images of different tissues, and then the image segmentation is used to improve the registration accura

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Yang, Ting, and Hui Yu. "Diagnostic Value of Multi-Row Spiral CT Imaging in Emergency Connoisseurs Injury Combined with Shock." Journal of Medical Imaging and Health Informatics 11, no. 8 (2021): 2280–88. http://dx.doi.org/10.1166/jmihi.2021.3539.

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In this paper, multi-slice spiral CT imaging is used to diagnose emergency connoisseurs injury hemorrhagic shock and brain perfusion scans in patients with the connoisseur’s injury. The EDS spectrum of multi-slice spiral CT obtained Perfusion imaging as the perfusion parameters. The patient’s CTA and volume reproduction images can be displayed at the same time. The patient’s diagnostic relationship can be visually observed. The best results set up two recommended schemes and compare the perfusion parameters and radiation dose with the standard control group. Ensuring the image quality required

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Nölker, Georg, Dieter Horstkotte, and Klaus-Jürgen Gutleben. "The Role of Three-dimensional Rotational Angiography in Atrial Fibrillation Ablation." Arrhythmia & Electrophysiology Review 2, no. 2 (2013): 120. http://dx.doi.org/10.15420/aer.2013.2.2.120.

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Three-dimensional (3D) imaging became the cornerstone of catheter guidance in atrial fibrillation (AF) ablation procedures during the last few years. Multislice computed tomography (MSCT) and magnetic resonance imaging (MRI) have been the technologies of choice for pre-procedural imaging of the left atrium (LA) and the pulmonary veins to make lesions more precisely set in a highly variable and difficult to understand 3D environment. These technologies have been used not only for pre-procedural orientation but have also been overlayed to fluoroscopic views in many fluoroscopy-guided ablation pr

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Li, Xianyu, Yulin He, and Qun Hua. "Application of Computed Tomographic Image Reconstruction Algorithms Based on Filtered Back-Projection in Diagnosis of Bone Trauma Diseases." Journal of Medical Imaging and Health Informatics 10, no. 5 (2020): 1219–24. http://dx.doi.org/10.1166/jmihi.2020.3036.

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Objective: To improve the diagnostic rate of bone trauma diseases by applying image reconstruction algorithm based on filtered back-projection to CT images of bone trauma. Methods: Sixty-three patients with bone trauma in our hospital were selected. After hospitalization, 63 patients took satisfactory localization images to make the lesions on the localization images close to or even exceed the resolution of conventional X-ray films. After scanning, the post-processing workstation software was used for post-processing of image reconstruction algorithm based on filtered back-projection. Finally

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Ishikawa, Takuya, Shigeru Suzuki, Yoshiaki Katada, et al. "Evaluation of three-dimensional iterative image reconstruction in virtual monochromatic imaging at 40 kilo-electron volts: phantom and clinical studies to assess the image noise and image quality in comparison with other reconstruction techniques." British Journal of Radiology 93, no. 1110 (2020): 20190675. http://dx.doi.org/10.1259/bjr.20190675.

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Objective: The purpose of this study was to evaluate the image quality in virtual monochromatic imaging (VMI) at 40 kilo-electron volts (keV) with three-dimensional iterative image reconstruction (3D-IIR). Methods: A phantom study and clinical study (31 patients) were performed with dual-energy CT (DECT). VMI at 40 keV was obtained and the images were reconstructed using filtered back projection (FBP), 50% adaptive statistical iterative reconstruction (ASiR), and 3D-IIR. We conducted subjective and objective evaluations of the image quality with each reconstruction technique. Results: The imag

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Schlachetzki, Felix, Thilo Hoelscher, Odo-Winfried Ullrich, Berthold Schalke, and Ulrich Bogdahn. "Dynamic and three dimensional transcranial ultrasonography of an arachnoid cyst in the cerebral convexity." Journal of Neurosurgery 94, no. 4 (2001): 655–59. http://dx.doi.org/10.3171/jns.2001.94.4.0655.

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✓ Structural imaging of the brain, such as cerebral computerized tomography (CT) and magnetic resonance (MR) imaging, is state-of-the-art. Dynamic transcranial (dTC) ultrasonography and three-dimensional (3D) transcranial color-coded duplex (TCC) ultrasonography are complementary, noninvasive procedures with the capacity for real-time imaging, which may aid in the temporary management of space-occupying lesions. A 16-year-old woman presented with recurrent tension-type headaches. A space-occupying arachnoid cyst in the cerebral convexity was demonstrated on MR images. The patient underwent an

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Schlachetzki, Felix, Thilo Hölscher, O. W. Ullrich, et al. "Dynamic and three-dimensional transcranial sonography studies of an asymptomatic, cerebral convexity arachnoid cyst." Neurosurgical Focus 7, no. 6 (1999): E12. http://dx.doi.org/10.3171/foc.1999.7.6.13.

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Dynamic and three-dimensional transcranial sonography (dTCS and 3D-TCCS) examinations are complementary, noninvasive methods used in the assessment and follow up of patients with cerebrospinal fluid (CSF) circulation disorders. A 16-year-old female patient who presented with a space-occupying, cerebral convexity arachnoid cyst and recurrent tension-type headache underwent examination for raised intracranial pressure (ICP) by using a standard color-coded duplex sonography system attached to a personal computer–based system for 3D data acquisition. Conventional TCS identified the outer arachnoid

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Knott, Danielle R. "Appropriate abdominal imaging for the emergency department patient." Proceedings of the Nova Scotian Institute of Science (NSIS) 51, no. 1 (2021): 169. http://dx.doi.org/10.15273/pnsis.v51i1.10738.

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Abdominal x-ray series (AXR) and abdominal CT scans (ACT) are commonly performed to aid in the diagnosis for patients who present to the emergency room with abdominal pain. Patients commonly receive both an AXR and ACT, due to a lack of knowledge regarding imaging appropriateness among healthcare professionals who order these exams. A primary simple retrospective data-analysis was performed to understand the prevalence of how often both exams were ordered in three Nova Scotia emergency departments. A literature review was also conducted to compare the diagnostic accuracy of each diagnostic ima

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Gassenmaier, Sebastian, Saif Afat, Marcel Dominik Nickel, et al. "Accelerated T2-Weighted TSE Imaging of the Prostate Using Deep Learning Image Reconstruction: A Prospective Comparison with Standard T2-Weighted TSE Imaging." Cancers 13, no. 14 (2021): 3593. http://dx.doi.org/10.3390/cancers13143593.

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Multiparametric MRI (mpMRI) of the prostate has become the standard of care in prostate cancer evaluation. Recently, deep learning image reconstruction (DLR) methods have been introduced with promising results regarding scan acceleration. Therefore, the aim of this study was to investigate the impact of deep learning image reconstruction (DLR) in a shortened acquisition process of T2-weighted TSE imaging, regarding the image quality and diagnostic confidence, as well as PI-RADS and T2 scoring, as compared to standard T2 TSE imaging. Sixty patients undergoing 3T mpMRI for the evaluation of pros

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Herickhoff, Carl D., Matthew R. Morgan, Joshua S. Broder, and Jeremy J. Dahl. "Low-cost Volumetric Ultrasound by Augmentation of 2D Systems: Design and Prototype." Ultrasonic Imaging 40, no. 1 (2017): 35–48. http://dx.doi.org/10.1177/0161734617718528.

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Conventional two-dimensional (2D) ultrasound imaging is a powerful diagnostic tool in the hands of an experienced user, yet 2D ultrasound remains clinically underutilized and inherently incomplete, with output being very operator dependent. Volumetric ultrasound systems can more fully capture a three-dimensional (3D) region of interest, but current 3D systems require specialized transducers, are prohibitively expensive for many clinical departments, and do not register image orientation with respect to the patient; these systems are designed to provide improved workflow rather than operator in

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Tan, Hsern Ern Ivan, Peter Luke Santa Maria, Philip Wijesinghe, et al. "Optical Coherence Tomography of the Tympanic Membrane and Middle Ear: A Review." Otolaryngology–Head and Neck Surgery 159, no. 3 (2018): 424–38. http://dx.doi.org/10.1177/0194599818775711.

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Objective To evaluate the recent developments in optical coherence tomography (OCT) for tympanic membrane (TM) and middle ear (ME) imaging and to identify what further development is required for the technology to be integrated into common clinical use. Data Sources PubMed, Embase, Google Scholar, Scopus, and Web of Science. Review Methods A comprehensive literature search was performed for English language articles published from January 1966 to January 2018 with the keywords “tympanic membrane or middle ear,”“optical coherence tomography,” and “imaging.” Conclusion Conventional imaging techn

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Hammer, Niels, Ulrich Hirschfeld, Hendrik Strunz, Michael Werner, Thomas Wolfskämpf, and Sabine Löffler. "Can the Diagnostics of Triangular Fibrocartilage Complex Lesions Be Improved by MRI-Based Soft-Tissue Reconstruction? An Imaging-Based Workup and Case Presentation." BioMed Research International 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/5870875.

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Introduction. The triangular fibrocartilage complex (TFCC) provides both mobility and stability of the radiocarpal joint. TFCC lesions are difficult to diagnose due to the complex anatomy. The standard treatment for TFCC lesions is arthroscopy, posing surgery-related risks onto the patients. This feasibility study aimed at developing a workup for soft-tissue reconstruction using clinical imaging, to verify these results in retrospective patient data. Methods. Microcomputed tomography (μ-CT), 3 T magnetic resonance imaging (MRI), and plastination were used to visualize the TFCC in cadaveric spe

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Bermejo, Carmina, Rocío Cantarero, Dolores Díaz, Eva Labrador, and Laura Ruiz López. "Three-dimensional Ultrasonography in the Diagnosis of Müllerian Duct Anomalies." Donald School Journal of Ultrasound in Obstetrics and Gynecology 3, no. 1 (2009): 21–30. http://dx.doi.org/10.5005/jp-journals-10009-1005.

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Abstract Aims We studied the effectiveness of three-dimensional (3D) ultrasonography in the diagnosis of uterine malformations. Methods 175 patients with clinical or ultrasonographic suspicion of uterine malformation were studied between November 2004 and June 2008. In all women we measured uterine volume for processing and later reconstruction of 3D images. Cases in which no anomaly was detected with the 3D technique were excluded from study. A thorough physical genital examination with speculum was done before or after ultrasonography, except in three women with an imperforate hymen. Uterine

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Çelik, Suat Erol, Bilal Kelten, Recai Gökcan, and Ahmet Cevri Yıldız. "The accuracy of multi-slice three-dimensional computerized tomography on the verification of the pedicle screw trajectory." Orthopedic Reviews 1, no. 1 (2009): 22. http://dx.doi.org/10.4081/or.2009.e22.

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The purpose of our study was to determine the diagnostic power of three-dimensional reformatted multi-slice computerized tomography (CT) images on misplaced pedicle screws in spinal surgery. Eighty-four consecutive patients with 458 screws in situ were investigated prospectively using both axial CT slices and reformatted images after operation by two blinded investigators. All the screw misplacements were documented and the differences between the two imaging modalities were recorded. Axial CT slices were able to show only 23 of 60 misplaced pedicle screws; multi-slice CT was three times more

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Dunham, Michael E., and Rosalee N. Wolf. "Visualizing the Pediatric Airway: Three-Dimensional Modeling of Endoscopic Images." Annals of Otology, Rhinology & Laryngology 105, no. 1 (1996): 12–17. http://dx.doi.org/10.1177/000348949610500103.

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Three-dimensional reconstruction of medical images has emerged as an important visualization tool for studying complex anatomy. These tools have found important applications in neurology and plastic surgery using computed tomography (CT) and magnetic resonance imaging (MRI) data. However, CT and MRI do not sufficiently delineate lesions of the pediatric airway. Inspection through the rod lens telescope remains the standard diagnostic method. A video recording of an endoscopic procedure is essentially a sequence of two-dimensional images captured as the telescope traverses the airway lumen. Usi

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Talmaceanu, Daniel, Lavinia Manuela Lenghel, Nicolae Bolog, et al. "Imaging modalities for temporomandibular joint disorders: an update." Medicine and Pharmacy Reports 91, no. 3 (2018): 280–87. http://dx.doi.org/10.15386/cjmed-970.

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The diagnosis and management of temporomandibular disorders (TMD) require both clinical and imaging examinations of the temporomandibular joint (TMJ). A variety of modalities can be used to image the TMJ, including magnetic resonance imaging (MRI), computed tomography (CT), cone beam CT, ultrasonography, conventional radiography. The present review outlines the indications of the most frequently used imaging techniques in TMD diagnosis.Because of the anatomic complexity of the TMJ, imaging can be difficult. Choosing the proper imaging technique is essential. Conventional radiography, nowadays,

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Krammer, Julia, Sergei Zolotarev, Inge Hillman, et al. "Evaluation of a new image reconstruction method for digital breast tomosynthesis: effects on the visibility of breast lesions and breast density." British Journal of Radiology 92, no. 1103 (2019): 20190345. http://dx.doi.org/10.1259/bjr.20190345.

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Objective: To compare image quality and breast density of two reconstruction methods, the widely-used filtered-back projection (FBP) reconstruction and the iterative heuristic Bayesian inference reconstruction (Bayesian inference reconstruction plus the method of total variation applied, HBI). Methods: Thirty-two clinical DBT data sets with malignant and benign findings, n = 27 and 17, respectively, were reconstructed using FBP and HBI. Three experienced radiologists evaluated the images independently using a 5-point visual grading scale and classified breast density according to the American

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Lorch, Benedikt, Ghislain Vaillant, Christian Baumgartner, Wenjia Bai, Daniel Rueckert, and Andreas Maier. "Automated Detection of Motion Artefacts in MR Imaging Using Decision Forests." Journal of Medical Engineering 2017 (June 11, 2017): 1–9. http://dx.doi.org/10.1155/2017/4501647.

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The acquisition of a Magnetic Resonance (MR) scan usually takes longer than subjects can remain still. Movement of the subject such as bulk patient motion or respiratory motion degrades the image quality and its diagnostic value by producing image artefacts like ghosting, blurring, and smearing. This work focuses on the effect of motion on the reconstructed slices and the detection of motion artefacts in the reconstruction by using a supervised learning approach based on random decision forests. Both the effects of bulk patient motion occurring at various time points in the acquisition on head

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Cen, Wei, Ralph Hoppe, Aiwu Sun, Hongyan Ding, and Ning Gu. "Machine-readable Yin–Yang imbalance: traditional Chinese medicine syndrome computer modeling based on three-dimensional noninvasive cardiac electrophysiology imaging." Journal of International Medical Research 47, no. 4 (2019): 1580–91. http://dx.doi.org/10.1177/0300060518824247.

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Objectives The principal diagnostic methods of traditional Chinese medicine (TCM) are inspection, auscultation and olfaction, inquiry, and pulse-taking. Treatment by syndrome differentiation is likely to be subjective. This study was designed to provide a basic theory for TCM diagnosis and establish an objective means of evaluating the correctness of syndrome differentiation. Methods We herein provide the basic theory of TCM syndrome computer modeling based on a noninvasive cardiac electrophysiology imaging technique. Noninvasive cardiac electrophysiology imaging records the heart’s electrical

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Badano, Luigi P. "The Clinical Benefits of Adding a Third Dimension to Assess the Left Ventricle with Echocardiography." Scientifica 2014 (2014): 1–18. http://dx.doi.org/10.1155/2014/897431.

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Three-dimensional echocardiography is a novel imaging technique based on acquisition and display of volumetric data sets in the beating heart. This permits a comprehensive evaluation of left ventricular (LV) anatomy and function from a single acquisition and expands the diagnostic possibilities of noninvasive cardiology. It provides the possibility of quantitating geometry and function of LV without preestablished assumptions regarding cardiac chamber shape and allows an echocardiographic assessment of the LV that is less operator-dependent and therefore more reproducible. Further developments

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Prasad, V. Natraj, and Ashish Khanal. "Computed Tomography evaluation of maxillofacial injuries." Journal of College of Medical Sciences-Nepal 12, no. 4 (2017): 131–36. http://dx.doi.org/10.3126/jcmsn.v12i4.16372.

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Background & Objectives: The maxillofacial region, a complex anatomical structure, can be evaluated by conventional (plain) films, Tomography, Multidetector Computed Tomography, Three-Dimensional Computed Tomography, Orthopantomogram and Magnetic Resonance Imaging. The study was conducted with objective of describing various forms of maxillofacial injuries, imaging features of different types of maxillofacial fractures and the advantage of using Three- Dimensional Computed Tomography reconstructed image. Materials & Methods: A hospital based cross-sectional study was conducted among 50

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Uesaka, Mitsuru, Yuki Mitsuya, Eiko Hashimoto, et al. "On-Site Non-Destructive Inspection of Bridges Using the 950 keV X-Band Electron Linac X-ray Source." Journal of Disaster Research 12, no. 3 (2017): 578–84. http://dx.doi.org/10.20965/jdr.2017.p0578.

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Regular diagnosis of the structural health of infrastructure, such as bridges, is indispensable to ensure safety and reliable operation of the society. Non-destructive tests based on X-ray imaging are powerful tools to inspect the inside of a concrete structure in detail. Establishing a diagnostic method of bridges based on X-ray visualization is required to examine the internal conditions and helps in the rationalization of maintenances. We demonstrated our 950 keV X-band electron linac based X-ray source for on-site actual bridge inspection and visualized the inner structure of a bottom floo

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Seuss, Hannes, Matthias Hammon, Frank Roemer, et al. "Scanned versus Fused-Reconstructed Oblique MR-Images for Assessment of the Tibiofibular Syndesmosis—Diagnostic PerFormance and Reader Agreement." Diagnostics 11, no. 2 (2021): 197. http://dx.doi.org/10.3390/diagnostics11020197.

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To evaluate the diagnostic performance and reader agreement of a novel MRI image fusion method enabling the reconstruction of oblique images for the assessment of the tibiofibular syndesmosis. We evaluated 40 magnetic resonance imaging examinations of patients with ankle sprains (16 with ruptures and 24 without) for the presence of anteroinferior tibiofibular ligament rupture. For all patients, we performed a fusion of standard two-dimensional transversal and coronal 3 mm PDw TSE images into an oblique-fusion reconstruction (OFR) and compared these against conventionally scanned oblique sequen

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Sauter, Andreas, Thomas Koehler, Bernhard Brendel, et al. "CT pulmonary angiography: dose reduction via a next generation iterative reconstruction algorithm." Acta Radiologica 60, no. 4 (2018): 478–87. http://dx.doi.org/10.1177/0284185118784976.

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Background Computed tomography pulmonary angiography (CTPA) is the standard imaging modality for detection or rule out of pulmonary embolism (PE); however, radiation exposure is a serious concern. With iterative reconstruction algorithms a distinct dose reduction could be achievable. Purpose To evaluate a next generation iterative reconstruction algorithm for detection or rule-out of PE in simulated low-dose CTPA. Material and Methods Low-dose CT datasets with 50%, 25%, and 12.5% of the original tube current were simulated based on CTPA examinations of 92 patients with suspected PE. All datase

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Hatamikia, Sepideh, Ander Biguri, Gernot Kronreif, et al. "Toward on-the-fly trajectory optimization for C-arm CBCT under strong kinematic constraints." PLOS ONE 16, no. 2 (2021): e0245508. http://dx.doi.org/10.1371/journal.pone.0245508.

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Cone beam computed tomography (CBCT) has become a vital tool in interventional radiology. Usually, a circular source-detector trajectory is used to acquire a three-dimensional (3D) image. Kinematic constraints due to the patient size or additional medical equipment often cause collisions with the imager while performing a full circular rotation. In a previous study, we developed a framework to design collision-free, patient-specific trajectories for the cases in which circular CBCT is not feasible. Our proposed trajectories included enough information to appropriately reconstruct a particular

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Flor, N., F. Sardanelli, G. Ghilardi, et al. "Common carotid artery pseudoaneurysm after neck dissection: colour Doppler ultrasound and multidetector computed tomography findings." Journal of Laryngology & Otology 121, no. 5 (2006): 497–500. http://dx.doi.org/10.1017/s0022215106005342.

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Common carotid artery pseudoaneurysm is a rare disease, which has been previously unreported in association with neck dissection. We describe the Doppler ultrasound and multidetector computed tomography (CT) findings of a case of carotid pseudoaneurysm, one month after pharyngolaryngectomy with bilateral neck dissection. Multidetector CT confirmed the diagnosis made on the basis of Doppler ultrasound; the high image quality of axial and three-dimensional reconstructions avoided the need for pre-operative conventional angiography. In the presence of a pulsatile cervical mass after neck surgery,

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Paśko, Sławomir, and Wojciech Glinkowski. "Combining 3D Structured Light Imaging and Spine X-ray Data Improves Visualization of the Spinous Lines in the Scoliotic Spine." Applied Sciences 11, no. 1 (2020): 301. http://dx.doi.org/10.3390/app11010301.

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Scoliosis is a three-dimensional trunk and spinal deformity. Patient evaluation is essential for the decision-making process and determines the selection of specific and adequate treatment. The diagnosis requires a radiological evaluation that exposes patients to radiation. This exposure reaches hazardous levels when numerous, repetitive radiographic studies are required for diagnostics, monitoring, and treatment. Technological improvements in radiographic devices have significantly reduced radiation exposure, but the risk for patients remains. Optical three-dimensional surface topography (3D

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Chen, Sarah A., Chin Siang Ong, Nagina Malguria, Luca A. Vricella, Juan R. Garcia, and Narutoshi Hibino. "Digital Design and 3D Printing of Aortic Arch Reconstruction in HLHS for Surgical Simulation and Training." World Journal for Pediatric and Congenital Heart Surgery 9, no. 4 (2018): 454–58. http://dx.doi.org/10.1177/2150135118771323.

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Purpose: Patients with hypoplastic left heart syndrome (HLHS) present a diverse spectrum of aortic arch morphology. Suboptimal geometry of the reconstructed aortic arch may result from inappropriate size and shape of an implanted patch and may be associated with poor outcomes. Meanwhile, advances in diagnostic imaging, computer-aided design, and three-dimensional (3D) printing technology have enabled the creation of 3D models. The purpose of this study is to create a surgical simulation and training model for aortic arch reconstruction. Description: Specialized segmentation software was used t

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Noël, Peter B., Stephan Engels, Thomas Köhler, et al. "Evaluation of an iterative model-based CT reconstruction algorithm by intra-patient comparison of standard and ultra-low-dose examinations." Acta Radiologica 59, no. 10 (2018): 1225–31. http://dx.doi.org/10.1177/0284185117752551.

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Background The explosive growth of computer tomography (CT) has led to a growing public health concern about patient and population radiation dose. A recently introduced technique for dose reduction, which can be combined with tube-current modulation, over-beam reduction, and organ-specific dose reduction, is iterative reconstruction (IR). Purpose To evaluate the quality, at different radiation dose levels, of three reconstruction algorithms for diagnostics of patients with proven liver metastases under tumor follow-up. Material and Methods A total of 40 thorax–abdomen–pelvis CT examinations a

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Shi, Suming, Ping Guo, and Wuqing Wang. "Magnetic Resonance Imaging of Ménière’s Disease After Intravenous Administration of Gadolinium." Annals of Otology, Rhinology & Laryngology 127, no. 11 (2018): 777–82. http://dx.doi.org/10.1177/0003489418794699.

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Objectives: A three-dimensional (3D) inversion-recovery (IR) sequence with real reconstruction (3D-real IR) sequence 4 hours after intravenous (IV) gadolinium injection has been used to visualize the endolymphatic hydrops (ELH) in Ménière’s disease (MD). This study was designed to investigate the ELH characteristics in clinically diagnosed definite MD and to explore the pathology of MD with magnetic resonance imaging (MRI). Methods: One hundred fifty-four patients with definite MD were included in this study. All patients underwent the IV method. The grades of ELH were analyzed on each image,

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Marques, Luis Miguel Sousa, Clara Romero, and José Gabriel Monteiro de Barros Cabral. "ODONTOID PROCESS HYPOPLASIA AND BIPARTITE ATLAS ASSOCIATED WITH ATLANTO-AXIAL INSTABILITY." Coluna/Columna 15, no. 4 (2016): 330–33. http://dx.doi.org/10.1590/s1808-185120161504157899.

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ABSTRACT Surgical treatment of craniocervical junction pathology has evolved considerably in recent years with the implementation of short fixation techniques rather than long occipito-cervical fixation (sub-axial). It is often difficult and sometimes misleading to determine the particular bone and vascular features (high riding vertebral artery, for instance) using only the conventional images in three orthogonal planes (axial, sagittal and coronal). The authors describe a rare clinical case of congenital malformation of the craniovertebral junction consisting of hypoplasia/agenesis of the od

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Menendez, Maria I., Richard Moore, Katherine Binzel, et al. "2516 Ultra-low Na18F tracer dosing for preclinical skeletal imaging enables new concepts in digital PET/CT." Journal of Clinical and Translational Science 2, S1 (2018): 34–35. http://dx.doi.org/10.1017/cts.2018.144.

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OBJECTIVES/SPECIFIC AIMS: The aim of this study was to assess the ultra-dose Na18F dPET protocol feasibility for skeleton imaging in a canine model with reduced radiation dose and preserved quantitative characteristics. We hypothesized that administering an ultra-low Na18F dose would provide suitable image quality while reducing subject’s exposure to radiation. METHODS/STUDY POPULATION: In total, 13 adult male beagles [weight (kg) mean±SD; 14.3±2.2] were scanned. The dogs were administered 3 different Na18F doses: 3 (standard dose/SD), 1 (low dose/LD), and 0.05 (ultra-low dose/ULD) mCi. Imagin

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Weinrich, Julius Matthias, Malte Warncke, Nis Wiese, et al. "Feasibility of extremely reduced-dose CT of the thoracic spine in human cadavers." Acta Radiologica 61, no. 8 (2019): 1034–41. http://dx.doi.org/10.1177/0284185119891417.

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Background According to the as low as reasonably achievable (ALARA) principle, radiation exposure in computed tomography (CT) should be minimized while maintaining adequate image quality. Dedicated CT protocols combined with iterative reconstruction (IR) can reduce radiation dose and/or improve image quality. Purpose To investigate the feasibility of extremely reduced-dose (RD) CT of the thoracic spine in human cadavers using a standard-dose (SD) and three different RDCT protocols reconstructed with filtered back projection (FBP) and IR. Material and Methods The thoracic spines of 11 cadavers

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Leal, Nallig, Eduardo Zurek, and Esmeide Leal. "Non-Local SVD Denoising of MRI Based on Sparse Representations." Sensors 20, no. 5 (2020): 1536. http://dx.doi.org/10.3390/s20051536.

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Magnetic Resonance (MR) Imaging is a diagnostic technique that produces noisy images, which must be filtered before processing to prevent diagnostic errors. However, filtering the noise while keeping fine details is a difficult task. This paper presents a method, based on sparse representations and singular value decomposition (SVD), for non-locally denoising MR images. The proposed method prevents blurring, artifacts, and residual noise. Our method is composed of three stages. The first stage divides the image into sub-volumes, to obtain its sparse representation, by using the KSVD algorithm.

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Liu, Jiewei, Ying Wang, Tana Zhao, Chunyu Li, and Lei Nie. "Application of 64-Slice Spiral CT Imaging Technology Based on Smart Medical Augmented Reality in the Diagnosis of Foreign Bodies in the Respiratory Tract in Children." Journal of Healthcare Engineering 2021 (April 28, 2021): 1–10. http://dx.doi.org/10.1155/2021/9962997.

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A foreign body in the respiratory tract is one of the common accidental injuries of children in our country, and is usually an important and serious event. Injuries caused by foreign substances in the respiratory tract seriously threaten the health and life of children in Korea and are a great challenge for parents as well. In the process of diagnosis of foreign bodies in the respiratory tract, there is often missed diagnosis or serious complications. Therefore, this article proposes the application of 64-slice spiral CT imaging technology based on smart medical augmented reality in the diagno

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Kalavagunta, Sudhakiran, Apostolos Karkanevatos, and Andrew C. Swift. "Giant vertebro-basilar aneurysm: an unusual cerebello-pontine angle lesion." Journal of Laryngology & Otology 120, no. 2 (2006): 1–3. http://dx.doi.org/10.1017/s0022215105006237.

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Acoustic neuromas (vestibular schwannomas) comprise more than 90 per cent of all cerebello-pontine angle (CPA) lesions. We present a rare case of a giant vertebro-basilar aneurysm presenting as a CPA lesion. The general condition of the patient precluded the completion of the magnetic resonance (MR) sequences. The clinical and limited radiological results (T2 images alone, the features of which were not specific) initially did not lead to a specific diagnosis. To obtain further radiological information a computed tomography (CT) scan with contrast was performed and this revealed the lesion to

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van den Wijngaard, Jeroen P. H. M., Pepijn van Horssen, Rene ter Wee, et al. "Organization and collateralization of a subendocardial plexus in end-stage human heart failure." American Journal of Physiology-Heart and Circulatory Physiology 298, no. 1 (2010): H158—H162. http://dx.doi.org/10.1152/ajpheart.00654.2009.

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In the failing myocardium a subendocardial plexus can develop. Detection of the presence or function, however, of such a plexus does not form part of the present diagnostic spectrum for heart failure. This may now change as new methods for high-resolution imaging of myocardial perfusion distribution are being developed. A severely hypertrophic heart was harvested during transplantation and analyzed for morphology of the intramural coronary arterial vasculature. The heart only had one coronary ostium, and the main branches of the coronary artery were cannulated. A fluorescent casting material w

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Yu, Wai-Yung, Thye Sin Ho, Henry Ko, Wai-Yee Chan, Serene Ong, and Francis Kim Hoong Hui. "Reducing cranial computed tomography effective radiation dose by 30% using adaptive iterative dose reduction." Proceedings of Singapore Healthcare 25, no. 4 (2016): 230–34. http://dx.doi.org/10.1177/2010105816651655.

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Introduction: The use of computed tomography (CT) imaging as a diagnostic modality is increasing rapidly and CT is the dominant contributor to diagnostic medical radiation exposure. The aim of this project was to reduce the effective radiation dose to patients undergoing cranial CT examination, while maintaining diagnostic image quality. Methods: Data from a total of 1003, 132 and 27 patients were examined for three protocols: CT head, CT angiography (CTA), and CT perfusion (CTP), respectively. Following installation of adaptive iterative dose reduction (AIDR) 3D software, tube current was low

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Lee, Ji Won, Chang Won Kim, Geewon Lee, et al. "Hybrid ECG-gated versus non-gated 512-slice CT angiography of the aorta and coronary artery: image quality and effect of a motion correction algorithm." Acta Radiologica 59, no. 2 (2017): 170–79. http://dx.doi.org/10.1177/0284185117707358.

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Background Using the hybrid electrocardiogram (ECG)-gated computed tomography (CT) technique, assessment of entire aorta, coronary arteries, and aortic valve can be possible using single-bolus contrast administration within a single acquisition. Purpose To compare the image quality of hybrid ECG-gated and non-gated CT angiography of the aorta and evaluate the effect of a motion correction algorithm (MCA) on coronary artery image quality in a hybrid ECG-gated aorta CT group. Material and Methods In total, 104 patients (76 men; mean age = 65.8 years) prospectively randomized into two groups (Gro

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Barreto, Luísa Schubach da Costa, Bruno Moreira das Neves, Cátia Cardoso Abdo Quintão, and José Augusto Mendes Miguel. "Como realizar a análise tridimensional das vias aéreas superiores em pacientes ortodônticos?" Orthodontic Science and Practice 14, no. 54 (2021): 12–21. http://dx.doi.org/10.24077/2021;1454-1221.

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The upper airways (UA) are influenced by the growth and development of the craniofacial complex and any alteration in the maxillary bones during orthodontic treatment can narrow or increase the size of the pharyngeal spaces. The three-dimensional analysis of the volume and the minimum axial area of the respective sub-spaces is beneficial for case planning as it allows the identification of possible physical barriers that compromise the air passage and the respiratory flow, besides being an auxiliary diagnostic method for disorders related to this function. The request for cone-beam computed to

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Frellesen, Claudia, Julian L. Wichmann, Patricia Tischendorf, et al. "High-pitch dual-source paranasal sinus CT in agitated patients with maxillofacial trauma: analysis of image quality, motion artifacts, and dose aspects." Acta Radiologica 59, no. 8 (2017): 909–16. http://dx.doi.org/10.1177/0284185117740931.

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Background Image quality benefits from high-pitch scanning in agitated patients by reducing acquisition time. Purpose To compare image quality and exposure parameters in patients with maxillofacial trauma on second- and third-generation dual-source computed tomography (DSCT). Material and Methods Four groups were compared. Group 1 was examined on second-generation DSCT (120 kV/50 mAs, pitch 3.0). The other three groups were examined on third-generation DSCT. Group 2 was scanned with 120 kV/50 mAs, pitch 2.2. Automated exposure control (AEC) was used in group 3 and group 4 with pitch factors of

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Buzan, Maria TA, Andreas Wetscherek, Christopher M. Rank, et al. "Delayed contrast dynamics as marker of regional impairment in pulmonary fibrosis using 5D MRI - a pilot study." British Journal of Radiology 93, no. 1113 (2020): 20190121. http://dx.doi.org/10.1259/bjr.20190121.

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Objective: To analyse delayed contrast dynamics of fibrotic lesions in interstitial lung disease (ILD) using five dimensional (5D) MRI and to correlate contrast dynamics with disease severity. Methods: 20 patients (mean age: 71 years; M:F, 13:7), with chronic fibrosing ILD: n = 12 idiopathic pulmonary fibrosis (IPF) and n = 8 non-IPF, underwent thin-section multislice CT as part of the standard diagnostic workup and additionally MRI of the lung. 2 min after contrast injection, a radial gradient echo sequence with golden-angle spacing was acquired during 5 min of free-breathing, followed by 5D

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Shirokanev, Aleksandr, Nataly Ilyasova, Nikita Andriyanov, Evgeniy Zamytskiy, Andrey Zolotarev, and Dmitriy Kirsh. "Modeling of Fundus Laser Exposure for Estimating Safe Laser Coagulation Parameters in the Treatment of Diabetic Retinopathy." Mathematics 9, no. 9 (2021): 967. http://dx.doi.org/10.3390/math9090967.

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A personalized medical approach can make diabetic retinopathy treatment more effective. To select effective methods of treatment, deep analysis and diagnostic data of a patient’s fundus are required. For this purpose, flat optical coherence tomography images are used to restore the three-dimensional structure of the fundus. Heat propagation through this structure is simulated via numerical methods. The article proposes algorithms for smooth segmentation of the retina for 3D model reconstruction and mathematical modeling of laser exposure while considering various parameters. The experiment was

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Zhang, Z. Q., and Q. H. Liu. "Three-Dimensional Nonlinear Image Reconstruction for Microwave Biomedical Imaging." IEEE Transactions on Biomedical Engineering 51, no. 3 (2004): 544–48. http://dx.doi.org/10.1109/tbme.2003.821052.

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Yu, Hong, Enrong Li, Wenlin Gong, and Shensheng Han. "Structured image reconstruction for three-dimensional ghost imaging lidar." Optics Express 23, no. 11 (2015): 14541. http://dx.doi.org/10.1364/oe.23.014541.

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Aslam, Naved, Bishav Mohan, PL Gautam, et al. "Selected Abstracts of the TEEPGI 2013 Workshop (1st to 3rd March 2013)." Journal of Perioperative Echocardiography 1, no. 1 (2013): 33–37. http://dx.doi.org/10.5005/jope-1-1-33.

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Background Paravalvular or paraprosthetic leak (PVL) is a complication associated with the surgical/transcatheter implantation of a prosthetic heart valve, more commonly a mechanical than a bioprosthetic valve. Transthoracic echocardiography (TTE) is the most important diagnostic modality for prosthetic valve function/dysfunction. However, TTE often cannot differentiate the PVL from prosthetic regurgitation. Transesophageal echocardiography (TEE) is the modality of choice which is also able to detect small, nonsignificant jets. Case Report We present a case of 78-year-old male who had undergon

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