Abstract
Gastrointestinal X-ray examinations are widely utilized to find gastric cancers because of the high incidence of this disease in Japan. Because of the high frequency of this examination relatively high gonad and bone marrow radiation exposure due to this kind of examination cannot be ignored. The relationship between exposed doses and amount of information are in inverse proportion. Therefore, this study of the relationship between amount of information and accuracy in gastric X-ray diagnosis was carried out to determine the necessary amount of information in this examination. To intentionally reduce the amount of information air gap method is utilized. Five each copies were made from various original G.I. tract films, and when copies were made air gap is intentionally reduced between original and duplicating films. The air gaps were 0, 5, 10, 15 and 20 mm. Fifty original films were prepared thus 250 copies (50 sets of 5 each copies) were made. These copied films were read by 10 radiologists and results were scored as true positive and false positive. The results showed that increase of amount of information itself does not mean the increase of diagnostic accuracy. Also it is suggested that the limit of diagnostic accuracy lies between
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Yamamoto, A
[1]
- Kyoto Prefectural Univ. of Medicine (Japan)
Citation Formats
Yamamoto, A.
Study of amount of information in x-ray examination of gastric diseases.
Japan: N. p.,
1981.
Web.
Yamamoto, A.
Study of amount of information in x-ray examination of gastric diseases.
Japan.
Yamamoto, A.
1981.
"Study of amount of information in x-ray examination of gastric diseases."
Japan.
@misc{etde_6431399,
title = {Study of amount of information in x-ray examination of gastric diseases}
author = {Yamamoto, A}
abstractNote = {Gastrointestinal X-ray examinations are widely utilized to find gastric cancers because of the high incidence of this disease in Japan. Because of the high frequency of this examination relatively high gonad and bone marrow radiation exposure due to this kind of examination cannot be ignored. The relationship between exposed doses and amount of information are in inverse proportion. Therefore, this study of the relationship between amount of information and accuracy in gastric X-ray diagnosis was carried out to determine the necessary amount of information in this examination. To intentionally reduce the amount of information air gap method is utilized. Five each copies were made from various original G.I. tract films, and when copies were made air gap is intentionally reduced between original and duplicating films. The air gaps were 0, 5, 10, 15 and 20 mm. Fifty original films were prepared thus 250 copies (50 sets of 5 each copies) were made. These copied films were read by 10 radiologists and results were scored as true positive and false positive. The results showed that increase of amount of information itself does not mean the increase of diagnostic accuracy. Also it is suggested that the limit of diagnostic accuracy lies between 5 and 10 mm air spaced films. Diagnoses of early gastric cancer and scar of gastric ulcer are easily effected by sharpness of image, but gastric ulcer are relatively not.}
journal = []
volume = {41:8}
journal type = {AC}
place = {Japan}
year = {1981}
month = {Aug}
}
title = {Study of amount of information in x-ray examination of gastric diseases}
author = {Yamamoto, A}
abstractNote = {Gastrointestinal X-ray examinations are widely utilized to find gastric cancers because of the high incidence of this disease in Japan. Because of the high frequency of this examination relatively high gonad and bone marrow radiation exposure due to this kind of examination cannot be ignored. The relationship between exposed doses and amount of information are in inverse proportion. Therefore, this study of the relationship between amount of information and accuracy in gastric X-ray diagnosis was carried out to determine the necessary amount of information in this examination. To intentionally reduce the amount of information air gap method is utilized. Five each copies were made from various original G.I. tract films, and when copies were made air gap is intentionally reduced between original and duplicating films. The air gaps were 0, 5, 10, 15 and 20 mm. Fifty original films were prepared thus 250 copies (50 sets of 5 each copies) were made. These copied films were read by 10 radiologists and results were scored as true positive and false positive. The results showed that increase of amount of information itself does not mean the increase of diagnostic accuracy. Also it is suggested that the limit of diagnostic accuracy lies between 5 and 10 mm air spaced films. Diagnoses of early gastric cancer and scar of gastric ulcer are easily effected by sharpness of image, but gastric ulcer are relatively not.}
journal = []
volume = {41:8}
journal type = {AC}
place = {Japan}
year = {1981}
month = {Aug}
}