Comparison of a digital flat-panel versus screen–film, photofluorography and storage-phosphor systems by detection of simulated lung adenocarcinoma lesions using hard copy images

Ono, Kenji; Yoshitake, Tsuyoshi; Akahane, Keiichi; Yamada, Yuichi; Maeda, Toshiro; Kai, Michiaki; Kusama, Tomoko

doi:10.1259/bjr/75926824

Cited by 6 publications

(4 citation statements)

References 17 publications

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“…Despite added efforts to avoid errors, some errors are inevitable due to the patient's physical stature, facial asymmetry, or inability to adhere to the instructions 37. According to Ono et al,37 anatomical variations might produce different radiographic images.…”

Section: Discussionmentioning

confidence: 99%

“…According to Ono et al,37 anatomical variations might produce different radiographic images. Additionally, Gianni et al38 stated that professionals who would use this radiography for treatment planning should understand those errors and account for these changes to the best of their ability, using their expertise and experience to ensure treatment success.…”

Section: Discussionmentioning

confidence: 99%

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Common positioning errors in panoramic radiography: A review

2014

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Professionals performing radiographic examinations are responsible for maintaining optimal image quality for accurate diagnoses. These professionals must competently execute techniques such as film manipulation and processing to minimize patient exposure to radiation. Improper performance by the professional and/or patient may result in a radiographic image of unsatisfactory quality that can also lead to a misdiagnosis and the development of an inadequate treatment plan. Currently, the most commonly performed extraoral examination is panoramic radiography. The invention of panoramic radiography has resulted in improvements in image quality with decreased exposure to radiation and at a low cost. However, this technique requires careful, accurate positioning of the patient's teeth and surrounding maxillofacial bone structure within the focal trough. Therefore, we reviewed the literature for the most common types of positioning errors in panoramic radiography to suggest the correct techniques. We would also discuss how to determine if the most common positioning errors occurred in panoramic radiography, such as in the positioning of the patient's head, tongue, chin, or body.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Common positioning errors in panoramic radiography: A review

2014

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“…In digital and analog chest X-ray systems, the radiation dose was extremely low, with averages ranging between 73 and 198 μGy. However, a phantom study that simulated Noguchi’s Type A small adenocarcinoma revealed that the detection rate was very low by digital and analog chest X-ray systems (Ono et al 2005). …”

Section: Discussionmentioning

confidence: 99%

Low-dose CT scan screening for lung cancer: comparison of images and radiation doses between low-dose CT and follow-up standard diagnostic CT

et al. 2013

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ObjectivesThis study aim to compare image quality and radiation doses between low-dose CT and follow-up standard diagnostic CT for lung cancer screening.MethodsIn a single medical institution, 19 subjects who had been screened for lung cancer by low-dose CT before going through follow-up standard diagnostic CT were randomly selected. Both CT image sets for all subjects were independently evaluated by five specialized physicians.ResultsThere were no significant differences between low-dose CT screening and follow-up standard diagnostic CT for lung cancer screening in all 11 criteria. The concordance rate for the diagnoses was approximately 80% (p < 0.001) for all categories. Agreement of the evaluation of all categories in the final diagnosis exceeded 94% (p < 0.001). Five physicians detecting and characterizing the pulmonary nodules did not recognized the difference between low-dose CT screening and follow-up standard diagnostic CT. With low-dose CT, the effective dose ranged between 1.3 and 3.4 mSv, whereas in the follow-up diagnostic CT, the effective dose ranged between 8.5 and 14.0 mSv.ConclusionThis study suggests that low-dose CT can be effectively used as a follow-up standard diagnostic CT in place of standard-dose CT in order to reduce the radiation dose.

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“…O advento das imagens digitais e seu contínuo desenvolvimento realçaram a necessidade de um sistema de informações que integrasse as informações clínicas do paciente com as suas respectivas imagens médicas (BANKMAN, 2000;AZEVEDO-MARQUES et al,2001;BUSHBERG et al, 2012 (FUHRMAN et al, 1988;KEHLER et al, 1989;MORIOKA et al, 1989;NEUFANG et al, 1989;SCHAEFER et al, 1990;FRIEDMANN;NEUFANG;KRUG, 1991;LEHMANN et al, 1991;MACMAHON et al, 1991;SARTONI et al, 1991;BLUME;JOST, 1992) e à utilização de algumas ferramentas do pós-processamento das imagens médicas tais como, o realce de borda e a inversão das imagens radiográficas digitais (MACMAHON et al, 1988;OESTMANN et al, 1988;SHELINE et al,1988;KHEDDACHE et al, 1991;BLUME;JOST, 1992;ONO et al,2005;PROKOP et al, 2003;MAROLF et al, 2008;REESE et al, 2011).…”

Section: Comunicação Armazenamento E Exibiçãounclassified

Efetividade dos filtros empregados em imagens radiográficas digitais na detecção dos quadros pulmonares de cães e gatos

Baroni¹

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AGRADECIMENTOSÀ minha Família, muito obrigada pelo carinho, por me proporcionarem o suporte necessário para a realização dos meus sonhos e me acompanharem em todos os momentos da minha vida.Em especial, agradeço a um amigo querido que me guiou em meio aos labirintos que passei.Confiança e estímulo eram o básico que se encontrava por trás da porta com a placa: Sala do Prof. Dr. Franklin de Almeida Sterman. Nos momentos especiais de atenção transbordavam conselhos profissionais e pessoais, todos absorvidos com muita intensidade e refletidos em forma de admiração, respeito e carinho e, na despedida das conversas, restava o sentimento ávido pela próxima lição de vida... Saudades! À minha orientadora, Profa. Dra. Ana Carolina Brandão de Campos Fonseca Pinto, agradeço pelo grande apoio, incentivo, confiança e amizade em todos esses anos de convívio. Admiro a dedicação que a senhora tem com os alunos, com a rotina hospitalar, com as disciplinas em que está envolvida e em especial, com o cuidado que tem com a sua família. Com certeza a senhora é um grande exemplo de mulher que conseguiu alcançar a igualdade com os homens, nos melhores quesitos de cada gênero e que luta diariamente para conseguir administrá-los de forma equilibrada. The transition of the conventional radiographic system to the digital one has been transforming the radiographic routine human and veterinary medicine over the last twenty years. Currently, the introduction of the computed radiography system in some hospitals and imaging services has increased the use of post processing tools. Considering the advantages and disadvantages of these tools and the lack of knowledge about the filters used in digital radiographic images, the aim of this study was to test efficacy of the standard, edge enhancement and gray scale reversed filters and their association to detect pulmonary patterns of cats and dogs. This work selected forty canine and feline sets of thoracic radiographs, including three projections. Three different observers with different degrees of experience and familiarity with the computed radiographic system analyzed the filters individually and then associated in order to detect pulmonary patterns. The best results in sensibility and specificity were related to the more experienced observers using the three associated filters. However, for the beginner, the best sensibility and specificity results was reached with the use of the standard filter in general results. In conclusion were statistical differences between more experienced and familiarized observers with the digital system and the use of filters can increase the radiologist performance when evaluating the pulmonary patterns on the radiography.

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Comparison of a digital flat-panel versus screen–film, photofluorography and storage-phosphor systems by detection of simulated lung adenocarcinoma lesions using hard copy images

Cited by 6 publications

References 17 publications

Common positioning errors in panoramic radiography: A review

Common positioning errors in panoramic radiography: A review

Low-dose CT scan screening for lung cancer: comparison of images and radiation doses between low-dose CT and follow-up standard diagnostic CT

Efetividade dos filtros empregados em imagens radiográficas digitais na detecção dos quadros pulmonares de cães e gatos

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