Digital gastrointestinal imaging: the effect of pixel size on detection of subtle mucosal abnormalities.
Publication/Presentation Date
3-1-1987
Abstract
Five radiographs of double-contrast colon examinations demonstrating subtle mucosal changes of inflammatory bowel disease and five radiographs of healthy colonic mucosa were selected and digitized to four levels of resolution. Pixel sizes of 0.1 mm, 0.2 mm, 0.4 mm, and 0.8 mm were used. Ten radiologists interpreted the images, which were displayed on laser-printed film. Analysis of variance with repeated measures was performed and receiver operator characteristic curves were determined. The results demonstrate that the sensitivity in detecting subtle mucosal abnormalities improved as the resolution improved, with the best sensitivity at the highest resolution; more experienced readers detected details well even at the poorer levels of resolution; the resolution necessary for successfully evaluating the colonic mucosa was lower than expected; and given low noise levels, the matrix size used in conventional television fluoroscopy would be adequate for mucosal evaluation.
Volume
162
Issue
3
First Page
853
Last Page
856
ISSN
0033-8419
Published In/Presented At
Kastan, D. J., Ackerman, L. V., & Feczko, P. J. (1987). Digital gastrointestinal imaging: the effect of pixel size on detection of subtle mucosal abnormalities. Radiology, 162(3), 853–856. https://doi.org/10.1148/radiology.162.3.3809504
Disciplines
Diagnosis | Medicine and Health Sciences | Other Analytical, Diagnostic and Therapeutic Techniques and Equipment | Radiology
PubMedID
3809504
Department(s)
Department of Radiology and Diagnostic Medical Imaging
Document Type
Article