Academic literature on the topic 'Radiographic control'
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Journal articles on the topic "Radiographic control"
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Rini Hatma Rusli, Bambang Ariyanto, Maritje S. J Malisngorar, and Ira Sandi Tunny. "Kendali Mutu (Quality Control) Pada Computed Radiology (CR)." Calory Journal : Medical Laboratory Journal 1, no. 3 (2023): 01–11. http://dx.doi.org/10.57213/caloryjournal.v1i3.41.
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Computed Radiography (CR) is a radiographic system that can convert analog signals into digital signals so that they are easily processed by image processing , to deal with the inconsistency of image quality from errors in lighting . One of the problems in CR is that the radiograph results are less than the maximum and can inhibit or reduce the ability to diagnose. This study aims to determine how the quality control of CR. This type of research is carried out in literature ( library study) that is by reading literature that has to do with the research conducted, as well as from other sources relating to Quality Control Computed Radiography (CR) and draw conclusions based on existing data. Based on the available literature, it can be concluded that the quality control on Computed Radiography (CR) is different but it does not reduce in terms of improving the quality of Computed Radiography (CR) in producing quality radiographs and can establish diagnoses.
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Younger, Alastair S., Bonita Sawatzky, and Peter Dryden. "Radiographic Assessment of Adult Flatfoot." Foot & Ankle International 26, no. 10 (2005): 820–25. http://dx.doi.org/10.1177/107110070502601006.
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Background: The accurate measurement of flatfoot on standing radiographs allows correct diagnosis of the condition and evaluation of reconstructive procedures. Method: The standing radiographic measurements of patients with symptomatic, adult flatfoot were compared to controls using blinded observers. Results: On the lateral radiograph, the talar-to-first metatarsal angle, the calcaneal pitch angle, and the medial cuneiform-fifth metatarsal height differed significantly between the patient group and the controls. The difference in the talar-to-first metatarsal angles on lateral radiographs was the most statistically significant (patient group 21.1 ±10.8 degrees and control 7.1 ± 10.7 degrees, p < 0.0001) with good correlation between readings (intraobserver 0.75, interobserver 0.83). On the anteroposterior (AP) radiograph, the talar head uncoverage distance was the most significantly different measurement between these groups. Conclusions: These findings support the hypothesis that the talar-first metatarsal angle is an accurate radiographic identifier of patients with symptomatic, adult flatfoot.
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Prastanti, Agustina Dwi, Darmini Darmini, Siti Daryati, Gatot Murti Wibowo, and Kesita Grace Natalia Suan. "Rancang Bangun Alat Pelapis Kaset Sebagai Upaya Pencegahan Infeksi pada Pemeriksaan Radiografi." Jurnal Imejing Diagnostik (JImeD) 1, no. 1 (2025): 56–61. https://doi.org/10.31983/jimed.v1i1.12567.
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Background: Infection control in radiography is carried out by wrapping tapes and radiograph equipment using polyethylene plastic bags. Existing conditions in the hospital require at least 1 to 2 layers of plastic for each radiography in patients with a history of infectious diseases. The use of plastic causes the amount of infectious plastic waste to be increased. Therefore, an alternative is needed to use acrylic mica material that can be used repeatedly and is environmentally friendly as a replacement for plastic bags.Methods: This research design is a Research and Development (RnD) study with the ADDIE model which is carried out with five stages, namely analysis, design, development, implementation, and evaluation. The data collection method is carried out by observation, testing the function of the tool, and then the data is processed and analyzed by criticizing the results of radiographic image quality using ImageJ software.Results: Four sizes of precision radiographic cassette coating have been produced with four radiographic cassette sizes. The average decrease in the mean number is 1.07%.Conclusion: The radiograph quality from using acrylic mica cassette coatings in radiograph examinations can still produce good quality radiographs based on the results of histogram graph analysis which produces graphs that have a similar shape between those without using cassette coatings and those with cassette coatings.
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Verstraete, Frank J. Μ., Philip H. Kass, and Cheryl H. Terpak. "Diagnostic value of full-mouth radiography in dogs." American Journal of Veterinary Research 59, no. 6 (1998): 686. http://dx.doi.org/10.2460/ajvr.1998.59.06.686.
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Abstract Objective To determine the diagnostic value of full-mouth radiography in dogs. Sample Population Prospective series of 226 dogs referred for dental treatment without previous full-mouth radiographic views being available. Procedure In a prospective nested case-control analysis of multiple outcomes in a hospital cohort of dogs presented for dental treatment, full-mouth radiographic views were obtained prior to oral examination and charting. After treatment, clinical and radiographic findings were compared, with reference to presenting problems, main clinical findings, additional information obtained from the radiographs, and unexpected radiographic findings. The importance of the radiographic findings in therapeutic decision-making was assessed. Results The main clinical findings were radiographically confirmed in all dogs. Selected presenting problems and main clinical findings yielded significantly increased odds ratios for a variety of other conditions, either expected or unexpected. Radiographs of teeth without clinical lesions yielded incidental or clinically important findings in 41.7 and 27.8% of dogs, respectively, and were considered of no clinical value in 30.5%. Radiographs of teeth with clinical lesions merely confirmed the findings in 24.3% of dogs, yielded additional or clinically essential information in 50.0 and 22.6%, respectively, and were considered of no value in 3.1%. Older dogs derived more benefit from full-mouth radiography than did younger dogs. Incidental findings were more common in larger dogs. Clinical Relevance Diagnostic yield of full-mouth radiography in new canine patients referred for dental treatment is high, and the routine use of such radiographs is justifiable. (Am J Vet Res 1998;59:686-691)
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Yunita Yunita and Ayu Mahani. "Studi Kasus Repeat (Pengulangan) Radiograf dengan Modalitas Digital Radiography (DR) di Instalasi Radiologi RSUD Dr. Soehadi Prijonegoro Sragen." Jurnal Ilmiah Kedokteran dan Kesehatan 4, no. 2 (2025): 227–41. https://doi.org/10.55606/klinik.v4i2.3929.
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Repeat analysis is a systematic method for analyzing radiographic images repeatedly to identify and reduce errors in digital processing. This method is part of the quality assurance (QA) and quality control (QC) program which aims to ensure optimal quality radiographic results. According to the Decree of the Minister of Health Number 129/Menkes/SK/II/2008 concerning the standard for repeat radiographic images <2%. This study aims to determine the factors that cause repeat photos and how to prevent repeat photos at Dr. Soehadi Prijonegoro Sragen Hospital. This research method uses qualitative with a case study approach to analyze repeat radiographs using Digital Radiography (DR) at the Radiology Installation of Dr. Soehadi Prijonegoro Sragen Hospital. The study was conducted from September 2024 to March 2025. The population includes all radiographic images with DR modality, while the sample is the result of repeat radiographic images. Data were collected through direct observation, interviews with three radiographers and one radiology specialist, and documentation. The average percentage of repeat X-ray photos on digital radiography modality in October 2024 was 1954 examinations with 122 repeats with a percentage of 6.24%, in November 2024 was 2206 examinations with 70 repeats with a percentage of 3.17%, in December 2024 was 2622 examinations with 16 repeats with a percentage of 0.61%. The percentage of repeats on digital radiography (DR) modality that occurred at Dr. Soehadi Prijonegoro Sragen Hospital exceeded the standards set by the Minister of Health with repeat results> 2% in October and November 2024. The factors causing repeats are due to positioning, patient movement, exposure factors, artifacts and equipment. The suggestion to minimize repeats that occur is to increase the accuracy of the radiographer in conducting the examination.
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Verstraete, Frank J. Μ., Philip H. Kass, and Cheryl H. Terpak. "Diagnostic value of full-mouth radiography in cats." American Journal of Veterinary Research 59, no. 6 (1998): 692. http://dx.doi.org/10.2460/ajvr.1998.59.06.692.
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Abstract Objective To determine the diagnostic value of full-mouth radiography in cats. Sample Population 115 cats referred for dental treatment without a previous full-mouth radiographic series available. Procedure In a prospective nested case-control analysis of multiple outcomes in a hospital cohort of cats referred for dental treatment, full-mouth radiography was done prior to oral examination and charting. After treatment, the clinical and radiographic findings were compared, with reference to presenting problems, main clinical findings, additional information obtained from radiography and unexpected radiographic findings. Importance of the radiographic findings in therapeutic decision making was assessed. Results The main clinical findings were radiographically confirmed in all cats. Odontoclastic resorption lesions, missed on clinical examination, were diagnosed in 8.7% of cats. Analysis of selected presenting problems and main clinical findings yielded significantly increased odds ratios for a variety of other conditions, either expected or unexpected. Radiographs of teeth without clinical lesions yielded incidental or clinically important findings in 4.8 and 41.7% of cats, respectively, and were considered of no clinical value in 53.6%. Radiographs of teeth with clinical lesions merely confirmed the findings in 13.9% of cats, but yielded additional or clinically essential information in 53.9 and 32.2%, respectively. Clinical Relevance The diagnostic yield of full-mouth radiography in new feline patients referred for dental treatment is high, and routine use of full-mouth radiography is justifiable. (Am J Vet Res 1998;59:692-695)
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Roberts, C., M. Porter, A. P. Wines, and B. Shadbolt. "THE ASSOCIATION OF SCAPHO-TRAPEZIO-TRAPEZOID OSTEOARTHROSIS AND SCAPHOLUNATE DISSOCIATION." Hand Surgery 11, no. 03 (2006): 135–41. http://dx.doi.org/10.1142/s021881040600322x.
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There are two parts to this paper. In the first part we report 18 cases of bilateral scapho-trapezio-trapezoid osteoarthrosis associated with uni- or bilateral scapholunate dissociation. This case series was followed prospectively using repeat clinical assessments and radiographs. We were able to document the progression of both the clinical manifestations and radiographic features of the scapholunate dissociation in these patients. In the second part of the paper we compared the radiographic indices of scapholunate dissociation seen in our series, that is, the scapholunate angle and interval, with those of a control group over time, to determine if there was a significant difference. The control group differed from our series principally by being devoid of any clinical or radiographic evidence of scapho-trapezio-trapezoid osteoarthrosis. We found that our case series already had some radiographic evidence of scapholunate attrition at presentation and that at follow-up the scapholunate dissociation became more pronounced both clinically and radiographically relative to the controls. The authors propose a theory to explain the association and temporal relationship between the two conditions.
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Lee, Hee Young, Matthieu Lalevee, Nacime S. Mansur, et al. "Comparative Assessment of Hallux Rigidus using Conventional Radiograph and Weightbearing CT." Foot & Ankle Orthopaedics 7, no. 1 (2022): 2473011421S0030. http://dx.doi.org/10.1177/2473011421s00304.
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Category: Midfoot/Forefoot Introduction/Purpose: The etiology of hallux rigidus (HR) is not well understood and Its association with first-ray hypermobility, hallux valgus and metatarsus primus elevatus (MPE) has not been clearly proven. MPE, elevated first metatarsal has been a topic of debate since Lambrinudi`s first description. Recent studies have supported MPE in hallux rigidus by measuring with various methods on wightbearing lateral radiographs, but there are limitations of conventional radiography due to variation in X- ray projection and superimposed metatarsals regardless of the methods of measurement. Our objective was to assess MPE and other associated parameters with hallux rigidus via radiography and WBCT for convergent validity and to evaluate the use of classification system used in conventional radiography with WBCT. Methods: This is a single-center, retrospective study from prospectively collected data. 20 symptomatic hallux rigidus patient with weightbearing radiograph and WBCT were enrolled from October 2014 to December 2020. Measured parameters included hallux valgus angle (HVA), intermetatarsal angle (IMA), hallux interphalangeal angle (HIPA), distal metatarsal articular angle (DMAA), 1st TMT joint version, First and second metatarsal lengths, Metatarsus adductus angle, 2nd cuneiform-2nd metatarsal angle, Talus-1st Metatarsal Angel, First and second metatarsal declination angles, and MPE. MPE was measured as the direct distance between 1st and 2nd metatarsals (modified Horton index). All patients were graded according to the radiographic criteria of Coughlin and Shurnas classification on radiographs and WBCT, separately. Paired T-test was performed to compare radiographic measurements with WBCT. Results: Mean age was 55.9, 12 males and 8 females. HVA (15.73 in X-ray vs 14.04 in WBCT), AP first TMT version (16.25 vs 16.47), 2nd cuneiform-2nd metatarsal angle (24.54 vs 26.60), Talus-1st Metatarsal Angel (-7.67 vs -7.89) were not different between radiograph and WBCT. MPE was measured higher in WBCT by 0.86 mm compared to radiograph. First metatarsal declination angle was lower in WBCT by 2.9° indicating increased MPE. When graded with radiographic findings, 5 (25%) patients were grade 1, 5 (25%) patients were grade 2 and 10 (50%) grade 3, when graded with WBCT, 1 (5%) patient had grade 1, 3 (15%) patients were grade 2 and 16 (80%) grade 3. Dorsal subluxation/translation of first metatarsal at first TMT joint was observed 3 (15%) in radiograph and 9 (45%) in WBCT. Conclusion: HVA, AP first TMT version, 2nd cuneiform-2nd metatarsal angle, Talus-1st Metatarsal Angel demonstrated consistent measurements in radiograph and WBCT. MPE was measured higher in WBCT when measured with direct distance (0.86 mm) between the first and second metatarsals using modified Horton index and first metatarsal declination angle (2.9°). When graded with WBCT, the subchondral cyst in the proximal phalanx and metatarsal head were better delineated leading to higher grade in WBCT. Further studies are needed for inter-rater reliability and discriminant validity of the measurements determined by differences between different groups (HR vs control).
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Amoah, Prince, Sandyson Owusu-Poku, and Gordon Asartenga Ajubala. "Investigation of Wall Thickness, Corrosion, and Deposits in Industrial Pipelines Using Radiographic Technique." International Journal of Corrosion 2023 (July 24, 2023): 1–9. http://dx.doi.org/10.1155/2023/4924399.
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In this study, radiographic techniques were used to inspect large-diameter pipes that are used for transporting fluids in some industries in Ghana. Radiographic approaches such as the double wall technique (DWT) and tangential radiographic technique (TRT) were used to evaluate the remaining wall thickness, deposits, and corrosion in the pipes. Two steel pipes with known varying wall thicknesses ranging from 4.00 mm to 13.00 mm with a diameter of 150.00 mm were examined to authenticate the accuracy and reliability of the tangential method that was used to measure the remaining wall thickness. The tangential configuration resulted in a higher material thickness, which therefore required more time of exposure compared to the DWT method. The exposure angle of the source to the tangential part of the specimen was approximately 87°. The film generated was compared with a normal pipe piece that was not machined to serve as a control. From the radiograph obtained, an average of 6 and 7 rounded indications depicting pitting corrosion were revealed on the radiograph of the internally and externally fabricated pipe, respectively. Radiographs after the TRT revealed that the recorded wall thickness obtained from the film is about twice the value of the calculated true wall thickness.
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Haeder, Dr Ahmed Abdulla, Dr Hajer Ibrahem Abdulla, Dr Niaz Jawad AL- Barznjy, and Dr Shahen Ali Ahmed. "Rheumatoid Arthritis of the Temporomandibular Joint, A Clinical and Radiographical Study." Mustansiria Dental Journal 6, no. 1 (2018): 69–86. http://dx.doi.org/10.32828/mdj.v6i1.428.
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To determine the extent of temporomandibular joint (TMJ) involvement in patients with rheumatoid arthritis compared with a matched control group. And to evaluate the correlation between clinical findings and radiographical findings.The studied sample comprised 50 patients with rheumatoid arthritis, age ranged from 18 to 72 years with the mean age of 40.98 (± 13.67.The control group consisted of 63 subjects age–matched non rheumatic patients: Each patient was informed about the purpose of the investigation and that it would include questionnaire, clinical and radiographical examinations. The radiographic examination was done by using double TMJ lateral panoramic technique.It was found that 64% of RA patients complained of two or more clinical signs and symptoms compared with 44% of the control group ,the difference was statistically significant (P< 0.05), the most important clinical findings were pain on palpation and on opening and closing, crepitation, limitation of jaw opening and morning stiffness, difference were statistically significant (P< 0.05). Among the clinically involved subjects in study RA group 28 subjects (56%) had bilateral involvement, 3 subjects (6%) had right side involved and 1 subject (2%) had only left side involvement. The radiographic involvement of TMJ was found in 16 subjects (32.0 %) of the study group compared with 1subject (1.6 %) of the control group. There is a highly statistically significant difference between the study group and the control group (P< 0.05); the most common radiographical finding was erosion. Complete condylar destruction was found in 1 patient which resulted in anterior open bite. Among involved cases 11 subjects (22%) had bilateral involvement, 5 subjects (10%) had unilateral involvement (3subjects (6%) had left side involved and, 2 (4 %) subjects had only right side involved. There was no correlation between clinical and radiographic find ings. There was correlation between the extent of radiographical findings and duration of Rheumatoid Arthritis p value (P< 0.05).The clinical and radiographic findings were more common in RA group than in control individual. The clinical and radiographic findings are not always bilateral in TMJs of patients with rheumatoid arthritis.Key words: TMJ disorders, TMJ
Dissertations / Theses on the topic "Radiographic control"
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Leal, James Andrew 1963. "Automated radiographic inspection of through-hole electronic circuit board solder defects." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/276672.
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A study has been carried out to investigate the use of "real-time" radiography as a method of automated inspection of through-hole electronic circuit board solder joints. By evaluating five major solder defects it has been found that film radiography employing high contrast film results in a definite distinction between a good solder joint and a defective solder joint. The same five defects were also found to be distinguishable from a good solder joint when evaluated by a real-time radiographic inspection unit using digital image processing. Although the type of defect being investigated was not discernible, the ability to distinguish a good solder joint from a defective solder joint is a major step in the implementation of automated solder joint inspection for military electronics.
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Hayek, Jorge Elie. ""Avaliação da densidade ótica perimplantar cervical em controle longitudinal de implantes com função oclusal imediata em maxila"." Universidade de São Paulo, 2005. http://www.teses.usp.br/teses/disponiveis/23/23139/tde-11112005-115646/.
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A proposta neste estudo foi avaliar as alterações da densidade ótica do osso alveolar perimplantar cervical em controle longitudinal, por meio de radiografias periapicais digitalizadas de dez pacientes, nos quais foram instalados seis implantes na maxila submetidos à função oclusal imediata, mediante a instalação de uma prótese fixa 24 horas após a cirurgia. Todos os pacientes foram avaliados clinicamente, com exames da análise da freqüência de ressonância, além de controle radiográfico. Foi utilizada a técnica radiográfica intrabucal do parale lismo, com cone longo, sendo que o feixe de raios X incidiu perpendicularmente ao longo eixo do implante. Os controles radiográficos foram realizados na instalação da prótese, após 6 meses e após 12 meses. As radiografias obtidas foram então capturadas por uma câmera de vídeo (preto e branco) por meio de um microscópio ótico (40 vezes de aumento). Devido à ampliação utilizada, os implantes tiveram suas imagens digitalizadas em 2 etapas (metade direita e metade esquerda), sendo consideradas como amostras independentes. Após a sobreposição de um gabarito sobre a imagem, com a finalidade padronizar as áreas a serem estudadas, foram analisadas as densidades óticas na área de interesse osso + implante e na área de controle implante (onde não é esperada alteração) por meio do software ImageLab. Para a correção de possíveis variações na densidade da radiografia e projeção geométrica oriundas da metodologia empregada, foi utilizada uma equação matemática para validar a análise dos dados obtidos. Os resultados mostraram que ocorreu variação percentual da densidade ótica na área de interesse (osso + implante) nos primeiros seis meses (T2) com diminuição de aproximadamente 5% para o lado direito e diminuição de aproximadamente 6% para o lado esquerdo em relação às radiografias iniciais (T1) e após doze meses, a diminuição da densidade ótica estabilizou-se, não sendo encontradas alterações estatisticamente significantes em relação ao período correspondente entre T2 (seis meses) e T3 (doze meses). Os resultados da análise digital das radiografias periapicais demonstraram coincidência com os resultados da análise da freqüência de ressonância e exame clínico dos implantes e demonstraram um aspecto compatível com o sucesso dos implantes osteointegrados com função imediata na maxila.<br>The aim in this study was the evaluation of the variations of the perimplantar optical bone density at the cervical region in a longitudinal control, by the use of digitized radiographs of ten patients, who received six implants installed in the maxilla and submitted to immediate occlusion function, through fixed prosthesis installed 24 hours after the surgery. All the patients were observed in clinical control, with resonance frequency analysis and also radiographic control. It was performed a intraoral radiograph using the paralleling technique, with the long cone and the beam of x-ray aimed perpendicular to the long axis of the implant. The radiographic controls were done at the time of the installation of the prosthesis, after six months and after twelve months after the first control. The obtained radiographs were captured by a black and white video camera by an optical microscope (40 times of magnification). Due to the utilized magnification, the implants have their images digitized in two steps: half right and half left, and they were considered as independent samples. After the superimposition of a standardized pattern, to help the standardization of the areas of the study, it was analyzed the optical density at the areas of interest bone + implant and at areas of control bone (where it is not hope changes) through the software ImageLab. To correct possible variations of the effect of the absence of standardization of the geometric projection and the radiographic density, it was realized a mathematic equation and it was obtained a correction factor of density in order to compensate. The results sho wed that there were percentage variation of the optical density at the area of interest (bone + implant) at six months (T2) showed a decreased of about 5% for the right side and showed a decreased of about 6% for the left side when analyzed the first control and after twelve months no significant statistical difference was observed between the T2 period (six months) and T3 period (twelve months). The results of digital analysis from the intraoral radiographs showed as the same as the results of resonance frequency analysis and the clinic examination of the implants and showed a success of implants installed in the maxilla with immediate occlusion function.
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Schneider, Uwe. "Proton radiography : a tool for quality control in proton therapy /." [S.l.] : [s.n.], 1994. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=10780.
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Ariga, Eiji, Shigeki Ito, Shizuhiko Deji, Takuya Saze, and Kunihide Nishizawa. "Development of dosimetry using detectors of diagnostic digital radiography systems." American Association of Physicists in Medicine, 2007. http://hdl.handle.net/2237/8818.
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Bickerton, M. L. "Development of improved techniques for the neutron radiography of CF188 flight control surfaces." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0006/MQ44833.pdf.
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Beldjoudi, Guillaume Nordine. "Approche multi-énergies associée à un détecteur spectrométrique rayons X pour l’identification de matériaux." Thesis, Lyon, INSA, 2011. http://www.theses.fr/2011ISAL0082/document.
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Le développement des détecteurs de rayons X en comptage à base de semiconducteurs est en plein essor depuis une dizaine d’années, et des applications aussi bien dans le domaine médical que dans le domaine du contrôle non destructif sont envisagées. Ces détecteurs permettent en effet de réaliser des mesures à des énergies multiples en une seule acquisition, et ce avec une excellente séparation énergétique. Depuis les années 2008-2009, il semble qu’une véritable course se soit lancée pour le développement de détecteur permettant des mesures multi-énergies sur un nombre toujours plus nombreux de bandes d’énergies. Cependant, à ce jour, parmi l’ensemble des travaux qui ont été réalisés, l’intérêt de réaliser des mesures sur un grand nombre d’énergies n’a pas été démontré pour l’identification de matériaux. Dans le cadre d’une étude en sécurité, nous avons évalué l’intérêt lié à l’utilisation de détecteurs de rayons X en comptage permettant la réalisation de mesures sur plusieurs bandes d’énergies. Le domaine applicatif étudié concerne l’identification de matériaux dans les bagages des voyageurs. Nous avons tout d’abord développé une méthode originale d’identification de matériaux homogènes applicable à tout type de détecteur multi-énergies. Dans un premier temps, nous avons étudié, en simulation, l’évolution des performances d’identification de matériaux avec l’augmentation du nombre de bandes d’énergies de comptage. Un processus d’optimisation a été réalisé dans le but de déterminer, pour certaines configurations, une géométrie optimale des bandes d’énergies de comptage. Dans un second temps, les conséquences résultant de la prise en compte de la fonction de réponse du détecteur ont été quantifiées par la simulation de différents effets détecteurs (partage de charge, résolution en énergie). Une validation expérimentale a enfin pu être effectuée en utilisant un détecteur spectrométrique en comptage. À partir des mesures réalisées avec un tel détecteur, un regroupement des données nous a permis d’évaluer les performances d’identification de détecteurs possédant un nombre de bandes d’énergies de comptage différent. Enfin, nous avons mené une étude préliminaire sur la transposition à la tomographie multi-énergies de la méthode d’identification de matériaux homogènes développée initialement en radiographie. Cette modalité d’imagerie permet alors l’identification de matériaux superposés<br>The development of X-ray photon counting detectors based on semiconductors has grown up over the last ten years, and applications in medicine, in security and in nondestructive testing are under study. These detectors make it possible to perform measurements at multiple energies in a single acquisition, with an excellent energetic separation. Since the years 2008-2009, it seems that a real race started for the development of detectors performing multi-energetic measurements on an increasing number of energy bands. However, today, within the works already done, the interest of performing measurements on a large number of energies has not been demonstrated for material identification. As part of a study in homeland security, we assessed the interest of using Xray counting detectors that perform measurements on multiple energy bands. The considered field of interest is material identification in the luggage of travelers. We first developed an original method for identifying single materials. This method is applicable to any type of multi-energy detector. In a first time, we studied in simulation the evolution of the performance for identifying materials with the increasing number of energy bands. An optimization process was carried out to determine, for certain configurations, an optimal geometry of the energy bands.In a second step, the consequences of taking into account the detector response function were quantified by simulating different sensors effects (charge sharing, energy resolution). An experimental validation has been performed by using a counting spectrometric detector. From the measurements experimentally obtained with such a detector, combining the data allowed us to evaluate the identification performance that would have detectors possessing a different number of energy bands. Finally, we conducted a preliminary study on the transposition of the identification method initially developed for radiography to the multi-energy computed tomography. This imaging modality allows to identify superimposed materials
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Tisseur, David. "Contrôle par imagerie X de combustible nucléaire pour les centrales à haute température." Villeurbanne, INSA, 2008. http://www.theses.fr/2008ISAL0015.
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Ce travail s'inscrit dans le cadre d'une thèse CIFRE entre AREVA NP et le laboratoire CNDRI de I'INSA de Lyon dans le contexte du développement d'une centrale de quatrième génération dite High Temperature Reactor (HTR). Dans ces futures centrales nucléaires, le combustible se présentera sous la forme de petites billes multicouches de 1 mm de diamètre appelée particule TRISO (TRistructuraiiSOtropic). Pour des raisons de sûreté divers contrôles de ces particules doivent être mis en place. Le premier objectif de ce travail est de développer une méthode de mesure de la densité des couches entourant les particules HTR par rayons X et la conception d'un démonstrateur industriel. La technique de mesure, que nous avons mise en place, est fondée sur une méthode inverse qui repose sur l'imagerie X en contraste de phase. Le second objectif de ce travail est de quantifier la répartition spatiale des particules dans un assemblage combustible nommé "compact". Après un état de l'art sur la mesure de l'homogénéité, nous montrons qu'une tomographie à haute énergie associée à un traitement de l'image adapté permet d'obtenir la position dans l'espace de chaque particule constituant le compact. L'approche proposée consiste à comparer un histogramme multiéchelle de répartition expérimental des particules à un modèle théorique à l'aide d'un test du chi2. Ceci nous permet de dégager un critère permettant de quantifier l'homogénéité des compacts<br>This PhD the. Sis is the result ot a collaboration between AR EVA NP and laboratory CNDRI of the INSA of Lyon in the context of the development of a 4\textsuperscript{th} generation nuclear power plant, named as High Temperature Reactor (HTR). In these future nuclear power plants, the fuel consists of small multi-layer spheres of 1 mm diameter called TRISO particle (TRistructural ISOtropie). For safety reasons various controls of these particles must be developed. The first objective of this study is to develop a measurement method of the density of the layers surrounding HTR particles by x-rays and to install an industrial demonstrator. The measurement technique is founded on an inverse method based on X-ray phase contrast imaging. The second objective is to quantify the space distribution of the particles in a fuel assembly named "compact". After a state of the art to the measure of the homogeneity, we demonstrate that a high energy tomography associated with a suitable image processing enables to obtain the position in the space of each particle constituting the compact. The suggested approach consists in comparing an experimental multiscale histogram of particle distribution with an ideal model using a chi2 test. This allows to suggest a criterion to quantify the homogeneity of the compact
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Yao, Min. "Computed radiography system modeling, simulation and optimization." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0128/document.
Full textAbstract:
Depuis plus d’un siècle, la radiographie sur film est utilisée pour le contrôle non destructif (CND) de pièces industrielles. Avec l’introduction de méthodes numériques dans le domaine médical, la communauté du CND industriel a commencé à considérer également les techniques numériques alternatives au film. La radiographie numérique (en anglais Computed radiography -CR) utilisant les écrans photostimulables (en anglais imaging plate -IP) est une voie intéressante à la fois du point de vue coût et facilité d’implémentation. Le détecteur (IP) utilisé se rapproche du film car il est flexible et réutilisable. L’exposition de l’IP aux rayons X génère une image latente qui est ensuite lue et numérisée grâce à un système de balayage optique par laser. A basse énergie, les performances du système CR sont bonnes ce qui explique son utilisation importante dans le domaine médical. A haute énergie par contre, les performances du système CR se dégradent à la fois à cause de la mauvaise absorption de l’IP mais également de la présence de rayonnement diffusé par la pièce qui, étant d’énergie plus faible, est préférentiellement absorbée par l’IP. Les normes internationales préconisent l’utilisation d’écrans métalliques pour améliorer la réponse des systèmes CR à haute énergie. Néanmoins, la nature et l’épaisseur de ces écrans n’est pas clairement définie et la gamme des configurations possibles est large. La simulation est un outil utile pour prévoir les performances d’une expérience et déterminer les meilleures conditions opératoires. Les méthodes Monte Carlo sont communément admises comme étant les plus précises pour simuler les phénomènes de transport de rayonnement, et ainsi comprendre les phénomènes physiques en jeu. Cependant, le caractère probabiliste de ces méthodes implique des temps de calcul importants, voire prohibitifs pour des géométries complexes. Les méthodes déterministes au contraire, peuvent prendre en compte des géométries complexes avec des temps de calcul raisonnables, mais l’estimation du rayonnement diffusé est plus difficile. Dans ce travail de thèse, nous avons tout d’abord mené une étude de simulation Monte Carlo afin de comprendre le fonctionnement des IP avec écrans métalliques à haute énergie pour le contrôle de pièces de forte épaisseur. Nous avons notamment suivi le trajet des photons X mais également des électrons. Quelques comparaisons expérimentales ont pu être menées à l’ESRF (European Synchrotron Radiation Facility). Puis nous avons proposé une approche de simulation hybride, qui combine l'utilisation de codes déterministe et Monte Carlo pour simuler l'imagerie d'objets de forme complexe. Cette approche prend en compte la dégradation introduite par la diffusion des rayons X et la fluorescence dans l'IP ainsi que la diffusion des photons optiques dans l'IP. Les résultats de différentes configurations de simulation ont été comparés<br>For over a century, film-based radiography has been used as a nondestructive testing technique for industrial inspections. With the advent of digital techniques in the medical domain, the NDT community is also considering alternative digital techniques. Computed Radiography (CR) is a cost-efficient and easy-to-implement replacement technique because it uses equipment very similar to film radiography. This technology uses flexible and reusable imaging plates (IP) as a detector to generate a latent image during x-ray exposure. With an optical scanning system, the latent image can be readout and digitized resulting in a direct digital image. CR is widely used in the medical field since it provides good performance at low energies. For industrial inspection, CR application is limited by its poor response to high energy radiation and the presence of scattering phenomena. To completely replace film radiography by such a system, its performance still needs to be improved by either finding more appropriate IPs or by optimizing operating conditions. Guidelines have been addressed in international standards to ensure a good image quality supplied by CR system, where metallic screens are recommended for the case of using high energy sources. However, the type and thickness of such a screen are not clearly defined and a large panel of possible configurations does exist. Simulation is a very useful tool to predict experimental outcomes and determine the optimal operating conditions. The Monte Carlo (MC) methods are widely accepted as the most accurate method to simulate radiation transport problems. It can give insight about physical phenomena, but due to its random nature, a large amount of computational time is required, especially for simulations involving complex geometries. Deterministic methods, on the other hand, can handle easily complex geometry, and are quite efficient. However, the estimation of scattering effects is more difficult with deterministic methods. In this thesis work, we have started with a Monte Carlo simulation study in order to investigate the physical phenomena involved in IP and in metallic screens at high energies. In particular we have studied separately the behavior of X-ray photons and electrons. Some experimental comparisons have been carried out at the European Synchrotron Radiation Facility. Then, we have proposed a hybrid simulation approach, combining the use of deterministic and Monte Carlo code, for simulating the imaging of complex shapes objects. This approach takes into account degradation introduced by X-ray scattering and fluorescence inside IP, as well as optical photons scattering during readout process. Different simulation configurations have been compared
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Guu, Adam Cheng-show. "Study of weld pool formation by real-time radiography with application for sensing and control of arc welding /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487688507503345.
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Silva, Sabrina Donato da. "Estabelecimento de requisitos de desempenho em dosimetria e proteção radiológica nos serviços de mamografia digital de Minas Gerais." CNEN - Centro de Desenvolvimento da Tecnologia Nuclear, Belo Horizonte, 2014. http://www.bdtd.cdtn.br//tde_busca/arquivo.php?codArquivo=310.
Full textAbstract:
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Segundo dados do Cadastro Nacional de Estabelecimentos de Saúde (CNES), o Estado de
Minas Gerais possui aproximadamente 477 mamógrafos em uso. Destes, estima-se que em
torno de 200 são digitais utilizando, principalmente, sistemas de radiografia computadorizada
(CR) ou radiografia direta (DR). A mamografia é insubstituível no diagnóstico e detecção
precoce do câncer de mama, principal causa de morte entre mulheres no mundo. Um alto padrão
de qualidade da imagem, aliada com uma dose tão baixa quanto razoavelmente exequível, são
essenciais para esta detecção precoce de forma segura, levando a necessidade de controle de
qualidade através do processo de otimização dos procedimentos.
Dentro deste contexto este estudo teve como objetivo determinar a dosimetria e a qualidade da
imagem em 72 combinações mamógrafo/CR e DRs em 68 serviços de mamografia do Estado
de Minas Gerais, o que corresponde aproximadamente 14% do total de mamógrafos atualmente
em uso no Estado de Minas Gerais e a cerca de 34% dos mamógrafos digitais em uso (CRs e
DRs).
O teste que avalia a linearidade da resposta do detector mamógrafico atendeu aos critérios de
desempenho especificados pela Sociedade Espanhola de Física médica em 85% dos
equipamentos avaliados. Porém dos serviços que apresentaram não conformidade nesse quesito
apenas dois apresentaram menos de quatro anos de uso do mamógrafo. Possivelmente o tempo
de utilização dos mamógrafos esteja relacionado a não conformidade apresentada por esses
serviços. A relação contraste ruído mostrou-se ser um ponto crítico na cadeia de produção da
imagem em sistemas digitais, principalmente para maiores espessuras de acrílico.
Mais da metade dos serviços avaliados nessa pesquisa obtiveram um bom desempenho na
relação sinal ruído (SNR), e na avaliação da imagem através do simulador de contraste e detalhe
CDMAM. Em relação ao ruído da imagem a maioria dos serviços ficaram não conformes.
Na avaliação da dose glandular média realizada com simuladores de mama, a média geral dos
valores de doses obtidos ficaram dentro dos limites considerados aceitáveis na literatura, para
a maioria das espessuras simuladas de mama. Porém os resultados obtidos nesse teste são
preocupantes, pois a maioria dos sistemas digitais avaliados ficaram não conformes nesse
quesito em pelo menos uma espessura de acrílico avaliada, e além disso houve um aumento
considerável da dose glandular média em comparação a medidas anteriores realizadas no Estado
de Minas Gerais. Já na comparação da dose glandular média entre sistemas CR e DR os sistemas
DR apresentaram doses consideravelmente menores para maiores espessuras, em comparação
com os sistemas CR. Em relação à comparação entre avaliações subsequentes a amostra seguiu
o comportamento geral dos serviços avaliados nesta pesquisa, com exceção da SNR que
apresentou um pior desempenho entre as avaliações subsequentes e o ruído, que apesar do baixo
índice de conformidade obteve uma melhora entre uma avaliação e outra.
Apesar dos potenciais benefícios que podem ser alcançados com o uso do sistema CR e DR, o
emprego dessa tecnologia precisa ser revisto e otimizado para que possa oferecer imagens de
qualidade utilizando a menor dose possível de radiação.<br>According to the National Registration of Health Establishments (CNES), there are
approximately 477 mammographs operating in the state of Minas Gerais, of which, roughly
estimating, 200 are digital apparatus using mainly computerized systems of radiography (CR)
or direct radiography (DR). Mammography is irreplaceable in the diagnosis and early detection
of breast cancer, the main cause of death in women worldwide. A high standard of image quality
coupled with a dose as low as reasonably practicable, are essential for early detection of this
disease with safely, leading to the need for quality control through optimization of process
procedures.
Within this context, this study aimed to determine dosimetry and image quality on 72
mammography combinations / CR and DR in 68 mammography services in the State of Minas
Gerais, which represents approximately 14% of mammography units currently in use in the
State of Minas Gerais and about 34% in use of digital mammography (CRs and DRs).
The test evaluates the linearity of response of the detector mammographic met the performance
criteria specified by the Spanish Society of Medical Physics in 85% of evaluated equipment.
However, the services they showed non-compliance in this regard, only two were less than four
years of use of mammography. Possibly the time of use of mammography is related to noncompliance
by these services. The contrast noise ratio proved to be a critical point in the
production chain image in digital systems, especially for thicker acrylic. More than half of the
services evaluated in this study showed good performance in signal noise, and image evaluation
by the phantom contrast and detail CDMAM. Regarding the image noise, most services were
non-compliance. In evaluating the average glandular dose with breast phantom, the overall
average dose values obtained were within acceptable limits in the literature for most of the
simulated breast thicknesses. However the results of that test are troubling, since most digital
systems evaluated were non-compliant in this regard at least one thick acrylic evaluated, and in
addition there was a considerable increase in the average glandular dose compared to previous
measurements performed in the State of Minas Gerais. In comparison between the average
glandular dose in CR and DR systems, the DR systems showed significantly lower doses for
greater thickness as compared with the CR systems.
Regarding the comparison between subsequent reviews, the sample followed the general
behavior of the services evaluated in this study, except the SNR had a worse performance
between subsequent evaluations and noise, which despite the low level of compliance achieved
an improvement between evaluation and other. Therefore, despite the potential benefits that can
be attained with the use of the CR and DR systems, the employment of this technology has to
be revised and optimised so that a better quality image can be achieved and the radiation dose
reduced as much as possible.
Books on the topic "Radiographic control"
1
1895-, Fuchs Arthur W., ed. Fuchs's radiographic exposure, processing, and quality control. 6th ed. Charles C. Thomas, 1998.
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2
1895-, Fuchs Arthur W., and Carroll Quinn B, eds. Fuchs's radiographic exposure, processing, and quality control. 5th ed. C.C. Thomas, 1993.
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3
L, Smith Nigel, and Gunn Christine, eds. Radiographic imaging: A practical approach. 2nd ed. Churchill Livingstone, 1994.
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4
Morgan, Joe P. Radiographic diagnosis and control of canine hip dysplasia. Venture Press, 1985.
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5
Morgan, Joe P. Radiographic diagnosis and control of canine hip dysplasia. Iowa State University Press], 1985.
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6
B, Carroll Quinn, Fuchs Arthur W. 1895-, and Carroll Quinn B, eds. Fuchs's Principles of radiographic exposure, processing, and quality control. 3rd ed. Thomas, 1985.
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7
Carroll, Quinn B. Fuchs's principles of radiographic exposure, processing, and quality control. 4th ed. Thomas, 1990.
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8
Gunn, Christine. Digital and radiographic imaging: A practical approach. 4th ed. Churchill Livingstone, 2009.
Find full textBook chapters on the topic "Radiographic control"
1
Fink, Mitchell P. "Clinical and Radiographic Assessment." In Source Control. Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-642-55914-3_76.
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2
Marchand, B. A., and D. M. Wilmot. "Radiographic Quality: Control and Evaluation." In Pediatric Imaging for the Technologist. Springer New York, 1987. http://dx.doi.org/10.1007/978-1-4612-4690-9_14.
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DeVolpi, A. "Neutron Radiographic Techniques for Nuclear Arms Control Applications." In Neutron Radiography. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3871-7_99.
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Rokhlin, S. I., A. C. Guu, and K. Cho. "Closed-Loop Radiographic Process Control of ARC Welding." In Review of Progress in Quantitative Nondestructive Evaluation. Springer US, 1989. http://dx.doi.org/10.1007/978-1-4613-0817-1_276.
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Guu, A. C., and S. I. Rokhlin. "Weld Penetration Control with Radiographic Feedback on Weld Pool Depression." In Review of Progress in Quantitative Nondestructive Evaluation. Springer US, 1990. http://dx.doi.org/10.1007/978-1-4684-5772-8_253.
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Bayon, G., and J. C. Domanus. "Indicators for Image Quality Control." In Practical Neutron Radiography. Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-015-1296-1_17.
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Schulz, W. "In-Pool Neutron Radiography of BWR-Control-Rods within the Scope of a Routine Refuelling Operation." In Neutron Radiography. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3871-7_46.
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Bouloumie, Jean-Pierre. "Aspects Qualitatifs Et Quantitatifs Du Controle Neutronographique Applique Aux Chaines Pyrotechniques Du Lanceur Ariane." In Neutron Radiography. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3871-7_36.
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Forster, E. "Control of scattered radiation, X-ray tables and ‘bucky’ stands." In Equipment for Diagnostic Radiography. Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4930-0_7.
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Mier-Sanmartín, Catalina, Gabriela Coronel-Salas, Kruzkaya Ordóñez, Abel Suing, and Carlos Ortiz. "Radiography of Public TV in Latin America." In Studies in Systems, Decision and Control. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-91860-0_9.
Full textConference papers on the topic "Radiographic control"
1
Yang, Bo, Haobo Yan, Hongquan Jiang, et al. "Digital Image Quality Assessment Technology for Weld Radiographic Film Based on ROI Multi-Indicator Fusion." In 2024 IEEE 7th Information Technology, Networking, Electronic and Automation Control Conference (ITNEC). IEEE, 2024. http://dx.doi.org/10.1109/itnec60942.2024.10733054.
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Galbraith, J. M., and L. A. Disbrow. "Microcomputer Programs to Enhance Corrosion Control Efforts in the Prudhoe Bay, Alaska Oil Field." In CORROSION 1986. NACE International, 1986. https://doi.org/10.5006/c1986-86036.
Full textAbstract:
Abstract ARCo Alaska, Inc. has operated the eastern half of the Prudhoe Bay Oil Field since production began in 1977. Severe corrosion problems have been encountered due to the low wettability of the oil combined with the 12% CO2 and trace of H2S in the associated gas. A corrosion control program comprised of coupon and electric resistance probe monitoring, radiographic, ultrasonic and visual inspection and chemical inhibition has grown as the field has aged. The corrosion control costs in the ARCo-operated Eastern Operating Area (EOA) are estimated at over eleven million dollars in 1986, with further growth anticipated in the coming years. An ARCo staff of nine technical personnel is responsible for supervising and optimizing these control programs. Extensive use of computers is required to effectively handle this critical effort. Although access to ARCo's mainframe computers is provided at all work locations, microcomputers are used much more frequently. They are more dependable, access is more rapid, and simpler programs are available. Two of the nine microcomputers used by the group are dedicated to on-line data acquisition. The remaining seven units are each equipped with 640 Kbyte RAM, one or two 360 Kbyte floppy discs, a 10 Mbyte hard disc, a 300/1200 baud modem, and a mainframe communication link. At this time, they are used for five primary tasks with additional applications being developed as needs arise. Two of the more unique applications are 1) a comprehensive coupon scheduling, sorting, inventory, data entry and analysis program, and 2) an radiographic interpretation program which is used to determine the integrity of corroded oil pipelines and generate a family of recommendations which range from line replacement to continued safe operation of the damaged flowlines. This paper will discuss these two applications in detail. Its intent is to aid individuals who are interested in assembling similar applications by sharing with them techniques we have developed over the course of four years.
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Byrne, Glenn. "Important Factors in Pipe Butt Welding of Super Duplex Stainless Steel (SDSS) UNS S32760 Using the GTAW Welding Process." In MPWT 2019. NACE International, 2019. https://doi.org/10.5006/mpwt19-14287.
Full textAbstract:
Abstract The paper considers best practice to realise the optimum combination of strength, toughness, corrosion resistance and radiographic integrity in UNS S32760 pipe girth welds made using the GTAW process. Aspects of fit up, tacking, root gap are considered. The effect of weld heat input and heat input control through the thickness of the joint, welding technique, inter pass temperature control and the use of different combinations of shielding and backing gasses on corrosion resistance of joints is presented. Current specification, procedure and welder qualification requirements are discussed, as is the need for supplementary testing, in particular quantitative microstructural evaluation.
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Cheng, XingGuo, Sapna Desai, Gloria Gutierrez, et al. "Promising Biological Performance of Biodegradable 3D Coated Mg Alloy Bone Scaffold." In CORROSION 2012. NACE International, 2012. https://doi.org/10.5006/c2012-01178.
Full textAbstract:
Abstract Mg alloy in the solid monolith forms has been investigated as a promising orthopedic implant. Different coating techniques have also been developed to control the bio-corrosion and improve the biocompatibility. In the current study, we design novel 3D Mg alloy scaffolds by rolling thin stiff sheets into hollow cylindrical scaffolds. Such designed scaffolds mimic the basic shape of the cortical bone while reduce the amount of alloy used. These scaffolds were further coated with biocompatible coatings to improve the biocompatiblity. Finally, they were tested in vitro using mesenchymal stem cells (MSCs) and in vivo using both rats and rabbits models. Our results demonstrated that coating significantly alter the bio-corrosion behavior and improve the biocompatibility. After 12 weeks of implantation in a critical-size ulna defect in rabbits, the scaffolds lead to different degree of radiographic unions and partial restoration of biomechanical strength in the defect. Post-implantation serum c-reactive protein measurement indicated a moderate level of immune response to the implants. Significantly bony tissue growth was observed both inside and outside the implants. This result suggests our designed and coated Mg alloy might be used as a promising scaffold for bone repair and regeneration.
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Sharp, W. B. A. (Sandy). "An Overview of Stress-Assisted Corrosion in the Pulp and Paper Industry." In CORROSION 2004. NACE International, 2004. https://doi.org/10.5006/c2004-04513.
Full textAbstract:
Abstract Stress-assisted corrosion (SAC) forms fissures on the waterside of boiler tubes near external attachment welds. Because of the severe consequence of water leaks in black liquor recovery boilers, these fissures present a particular hazard in the pulp and paper industry. Aware of the hazard they present since the late 1980s, this industry has developed radiographic techniques to estimate their severity and empirical rules to determine the fitness-for-service of tubes containing SAC. Perhaps surprisingly, burst tests suggest that the strength imparted by external attachment welds more than compensates for the weakening effects of the internal stress-assisted corrosion fissures they produce. Although stress-assisted corrosion is closely related to corrosion fatigue cracking, which has been studied in detail by EPRI, cycle chemistry guidelines developed to avoid corrosion fatigue in utility boilers have not generally been applied in the pulp and paper industry. On the basis of information gathered at a pulp and paper industry colloquium on stress-assisted corrosion, a research program was developed to clarify the mechanisms of stress assisted corrosion (SAC) in industrial boilers and to determine the key parameters in its mitigation and control.
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Galbraith, Joseph M., and Kit L. Coleman. "Designing Real-Time Radioscopie Inspection Systems to Access Piping Integrity." In CORROSION 1998. NACE International, 1998. https://doi.org/10.5006/c1998-98366.
Full textAbstract:
Abstract Due to severe corrosion problems that occurred much earlier in the life of the Prudhoe Bay oil fields than was expected, a method to economically identify areas of corrosion in hundreds of miles of transportation piping became an urgent need in the early years of the 1980s. Since production in the above-ground, insulated lines ranging in diameter from four to forty-two inches (10 to 107 cm) could not be interrupted or the insulation removed, conventional inspection techniques did not offer a solution. Through a series of developmental programs, a radiographic method was established that was able to locate and quantify the pitting corrosion and thereby determine the integrity of the damaged piping.1 This provided a basis for the later development of automated, or Real-Time, Radioscopy. The early real-time radioscopic systems were introduced on the North Slope in the mid-1980s. These systems utilized image capture devices developed for the medical industry carried down the horizontal piping by motorized crawlers coupled with microcomputer-based image enhancement and control systems. Limitations inherent with the image capture devices, the motor control and mechanical units, and microcomputers of that time have been greatly minimized by significant advances in all three areas over the last decade. The transformation of these early systems into the rugged, durable real-time radioscopic equipment used today will be outlined in this paper.
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Lee, Jaemin, Yonguk Kim, Doojin Choi, and Hyungjin Kim. "Unsupervised Anomaly Detection of Weld Defects in Pipes using Radiography Testing Image." In 2024 24th International Conference on Control, Automation and Systems (ICCAS). IEEE, 2024. https://doi.org/10.23919/iccas63016.2024.10773367.
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Kaushik, Pratham, and Pooja Sharma. "DenseNet201-Powered Dental Radiograph Classification: A Deep Learning Approach for Multi-class Dental Pathology Detection." In 2025 Fourth International Conference on Power, Control and Computing Technologies (ICPC2T). IEEE, 2025. https://doi.org/10.1109/icpc2t63847.2025.10958599.
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Mahajanam, Sudhakar, Efrain Garcia, and Ken Riggs. "Metallurgical Analysis of Hydrotested 20-Inch Natural Gas Pipeline." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16330.
Full textAbstract:
Abstract Hydrostatic testing of pipelines is critical during construction and maintenance. It is an important pre-commission test and destructive tool which validates the integrity of the pipeline prior to actual service with flammable fluids at high pressures. Hydrotesting provides the quality control needed to ensure that the required pipeline tensile strength is available to sustain the operating pressure, and that the welds and joints are defect free. In this paper, we discuss a recent case study wherein metallurgical analysis was performed at our lab on a 20-inch API 5L X65 carbon steel pipeline. A leak was detected during the commissioning hydrotest of a newly constructed pipeline in the field at a client site. Dye penetrant testing, x-ray radiography and phased array UT inspection techniques revealed the presence of a defect at the electric resistance weld (ERW) seam. Based on the analyses, it was confirmed that the defect was due to incomplete fusion at the long seam weld during the ERW welding process.
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Hyo-Min Cho, So-Young Lee, SoRa Nam, Chang-Lae Lee, Ji-Young Jung, and Hee-Joung Kim. "Imaging characteristics of mobile digital radiographic system." In 2007 International Conference on Control, Automation and Systems. IEEE, 2007. http://dx.doi.org/10.1109/iccas.2007.4406766.
Full textReports on the topic "Radiographic control"
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LaCivita, Kenneth J. Development of the USAF Computed Radiography (CR) Process Control. Defense Technical Information Center, 2008. http://dx.doi.org/10.21236/ada506683.
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Pope and Pope. L51653 Fracture Behavior of Girth Welds Containing Natural Defects Comparison with Existing Standards. Pipeline Research Council International, Inc. (PRCI), 1992. http://dx.doi.org/10.55274/r0010132.
Full textAbstract:
The first use of radiographic standards for inspection and acceptance of finished girth welds was adopted by API in 1953. This standard was largely based on the Unfired Pressure Vessel Code� which was adopted by ASME in 1931. At that time and to this day, weld defect acceptance standards are based on workmanship principles. In other words, the so called "Workmanship defect acceptance standards"� reflect the weld quality levels produced by. a trained welder using satisfactory materials, equipment and procedures. For many years exclusive use was made of the API 1104 workmanship defect acceptance levels for all field pipeline and related facilities welds. This, and very similar defect acceptance standards (e.g. BS 4515, CSA 2184, AS 1697, etc.) are used in many countries throughout the world. Though the specified acceptance levels have no scientific basis, the use of workmanship standards has provided an adequate level of quality control for many years. Particularly worthy of attention in this context is the fact that the currently stipulated levels have been developed for welds in lower strength pipe grades. Unfortunately, the developments in acceptance levels have not kept pace with those occurring in-pipeline technology. Furthermore, pipe size, strength and toughness, weld metal properties or pipeline operating conditions are not considered in the present-day defect acceptance standards. Problems of this kind have led companies involved in gas/oil transporting activities to develop their own standard requirements or at least to produce a supplement to the general standards. This report describes the results of an investigation into the engineering significance of girth weld defect acceptance criteria based upon weld quality (or workmanship) considerations. To this end, research efforts were divided into a theoretical and an experimental part. The theoretical study involved a comparison of internationally used weld quality standards and codes for pipeline welding in order to identify the general features common to them and to obtain a clear view of the different acceptability criteria. The experimental part was designed to provide factual information on the failure behaviour of defective girth welds in large pipe diameter pipe lines. The focal point of the experimental examinations was to compare, on the basis of wide plate test specimen behaviour, the performance levels of girth welds containing planar weld defects which were grossly out of tolerance with respect to most present-day weld quality (workmanship standards) specifications.
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Moshura, Mariia, Yana Terleeva, and Olena Nesterova. Evaluating the performance of computer detection software implementation in triaging chest X-ray images in TB screening program in Ukraine. Public Health Center of the Ministry of Health of Ukraine, 2024. https://doi.org/10.63263/tb0000001.
Full textAbstract:
Modern technologies for diagnosing tuberculosis and effective treatment regimens contribute to the fight against the disease in various ways. In general, modern diagnostic and treatment technologies increase the chances of early detection and treatment of tuberculosis, reducing morbidity and improving quality of life. This study aimed to determine the optimal model for the implementation of computer-aided diagnostic (CAD) systems in Ukrainian TB facilities in Lviv and Sumy oblasts. The study had the following components: Data collection from TB facilities included an assessment of the current workload of radiologists and phthisiologists. The staffing potential of the institutions and their technical equipment were determined to understand the ability to use CAD systems. The qualitative component of the study aimed to assess the attitude and acceptance of CAD among physicians, including radiologists and phthisiologists, and national experts, their views on possible models of CAD implementation, as well as to identify barriers and facilitators for CAD implementation. The calibration component of the study consisted of determining the optimal diagnostic characteristics and thresholds of the selected CAD in the local context and methods of its use. CAD implementation cost estimation was to determine the assessment and economic cost of implementing CAD systems in Ukraine. CAD technology can improve the efficiency and practicality of radiography when used for TB screening and triage. In the Ukrainian context, this could be useful in TB control programs by expanding TB screening capacity. This technology can replace or complement human reading of X-rays during TB screening, help avoid differences in interpretation between examiners, and reduce delays in X-ray evaluation, especially when there is a lack of qualified personnel.