Rando 팬텀을 이용한 Multi-detector Computed Tomography의 Automatic Exposure Control 특성 평가

• 영문명: The Assesment of Automatic Exposure Control in Multi-detector Computed Tomography by Rando phantom
• 발행기관: 대한CT영상기술학회
• 저자명: 김정훈(Jung Hoon Kim) 김상현(Sang Hyun Kim) 김선기(Sean Ki Kim) 김기홍(Ki Hong Kim)
• 간행물 정보: 『대한CT영상기술학회지』대한전산화단층기술학회지 제12권 제2호, 95~102쪽, 전체 8쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2010.09.30

영문 초록

Purpose To assess reaction characterization of automatic exposure controller(AEC) system by each manufacturer according to changing of subject thickness and changes of image quality acquired by them and phantom. Materials and methods 64 multi-detector computed tomography by four manufacturers including Siemens(Somatom Definition, Erlangen, Germany), GE Healthcare(Lightspeed VCT, Milwaukee, USA), Philips(Brilliance, Cleaveland, USA), and Toshiba(Aquillion, Tokyo, Japan) were used for this study. The Rando phantom(AR1-200X, Fluke Biomedical, USA) which was to change thickness was used also. General scan condition was used in abdominal pelvic examination and all available function of AEC was used. We displayed in graph changing of each mAs value, and measured standard deviation of each noise value according to change of subject thickness. Results The range of fluctuation of mAs value by each manufacturers’ AEC was 207 mAs(from 265 to 58 mAs), 179,5 mAs(from 197 to 18 mAs), 127.5 mAs(from 184.5 to 57 mAs), and from 174 mAs(from 196 to 22 mAs) in S, G, P, T, respectively. Noise values measured in phantom images were 9.1±2.4, 11.43±2.65, 7.9±2.59, 8.96±2.67, in S, G, P, T, respectively. Standard deviation of each noise value according to change of subject thickness was maintained a regular value as from ±2.4 to ±2.67 in all the four equipments. Conclusion AEC system is valuable technique to reduce radiation exposure based on geometric structure of patient and clinical demand. Therefore, characterization of AEC system should be recognized, and needed for periodical phantom scan to confirm primary function.

목차

Abstract

Ⅰ. 서론

Ⅱ. 대상 및 방법

Ⅲ. 결과

Ⅳ. 고찰

Ⅴ. 결론

참고문헌

키워드

automatic exposure controller(AEC) system noise Rando phantom