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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

자료유형
학술저널
저자정보
박성진 (경희대학교 의과대학 진단방사선과학교실)
저널정보
대한영상의학회 대한방사선의학회지 대한방사선의학회지 제37권 제4호
발행연도
1997.1
수록면
687 - 692 (6page)

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Purpose : To determine the preferred method of drinking water before spiral CT scanning of a gastric lesion.Materials and Methods : Spiral CT scans of 92 patients with gastric lesion were obtained and evaluated. Patients drank tap water as oral contrast material and were scanned in the prone position ; they were divided into two groups according to the method by which water ingested. Group 1 patients drank 500ml, 60 minutes before scanming ; 500mL, 30 minutes before scanning ; and 500mL just before scanning, while those in group 2 drank 800-1000mL just before scanning. In all cases, precontrast images were obtained, and an additional 300mL of water was given if the stomach was not adequately distended. Postcontrast images were obtained at 35 seconds, 80 seconds and 3 minutes after the start of infusion of contrast material. For 35- and 80- second scans, spiral CT was performed with 5-mm collimation, 7mm/sec table feed, and 5-mm reconstruction interval;for precontrast ant 3-minute scans, 10-mm collimaton, 10mm/sec table feed, and 10-mm reconstruction interval were used. There were 40 patients in group 1, and 52 in group 2.The images of the two groups were evaluated according to three criteria : gastric distension, mucosal enhancement, and tumor distinction. For each criterion, the images were evalutated by grading; an 'excellent' image scored 3, 'good' 2, 'ordinary' 1, and 'poor' 0. The differences in imaging quality between the two groups were statistically evaluated.Images obtained at 35 and 80 seconds, and at 3 minutes after the start of infusion of contrast material were compared, and the detectability of 18 confirmed cases of early gastric cancer was evaluated.Results : For gastric distension, the mean score was 1.65 in group 1, and 1.81 in group 2(P=0.33); the corresponding figures for mucosal enhancement were 1.45 and 1.65(P=0.11), and for tumor distincton, 1.30 and 1.52(P=0.09). Between the two groups, there were therefore no statistical difference in image quality. With regard to postcontrast images, those obtained after a delay of 35 seconds were best;those obtained at 80 seconds were better than those obtained at 3 mintures.Fifteen of 18 case of early gastric cancer were detected on spiral CT, and the detection rate was 83.8%.Conclusion : No statistically significant was seen between the two groups, and a single drink of water-just before scanning- is thus preferable to several drinks. Two scans, with images delayed for 35 and 80 seconds after contrast enhancement, are adequate. The use of these methods may improve the image quality of gastric lesions and the detection rate of early gastric cancer.
#Stomach, neoplasms #Stomach, CT #Computed tomography #CT), helical

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