16 MDCT장비에서 Dose Modulation Program인 CareDose와 CareDose4D의 CTDIvol값 비교

• 영문명: A Experimental Study on Value of CTDIvol with dose modulation program of CareDose and CareDose4D in 16 MDCT
• 발행기관: 대한CT영상기술학회
• 저자명: 이희정(Hee Jeong Lee) 권성옥(Seong Ohk Kwon) 김주(Joo Kim) 서동수(Dong Soo Suh) 정성민(Seong Min Chung) 임청환(Cheong Hwan Lim)
• 간행물 정보: 『대한CT영상기술학회지』대한전산화단층기술학회지 제7권 제1호, 148~156쪽, 전체 9쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2005.03.30

영문 초록

Purpose The aim of this study is to apply to clinic a proper technical factor by comparing the value of CTDIvol with dose modulation program of CareDose and CareDose4D in 16 MDCT. Material & Method The value of CTDIvol of constant and variable mA(140mA) was measured in Siemens somatom sensation 16 VB10B CT. The measurement of CTDIvol of CareDose and CareDose4D was performed with technical factor variation. With ART phantom of human shape, CareDose used the Siemens somatom sensation 16 VA70C, and CareDose4D done Siemens somatom sensation 16 VB10B. Result The value of CTDIvol of constant mA and variable mA of CareDose4D was 9.8mGy to 10.92mGy, and 4.13mGy to 5.58mGy, respectively. The value of CTDIvol by kVp variation was minimum 2.53mGy, 2.335mGy at 80kVp and maximum 11.34mGy to 10.18mGy at 140 kVp in the two mode. The value of CTDIvol by table pitch variation in CareDose didn’t vary with 8.14mGy, that by pitch variation of 1, 1.2, 1.5, 2 was 7.38, 7.36, 5.94, 4.60mGy, respectively. The value of CTDIvol by slice thickness variation in CareDose also didn’t vary with 8.14mGy, but CareDose4D increased from 7.26 to 7.35mGy according to increment of thickness. When the tube rotation time was 0.5, 0.75, 1, 1.5 second, the value of CTDivol was 8.14, 8.56, 8.14, 8.21mGy in CareDose and 7.27, 7.30, 7.29, 7.38mGy in CareDose4D, respectively. The value of CTDIvol by scan type was 17.16 and 17.97mGy in CareDose and CareDose4D with sequence mode, and 22.06 and 22.65mGy with spiral mode. Conlclusion The value of CTDivol was decreased by appling CT with dose modulation program for reduction of exposed dose. The value of CTDIvol excluding scan type of technical factor was decreased more in CareDose4D than in CareDose.

목차

Abstract

Ⅰ. 목적

Ⅱ. 재료 및 방법

Ⅲ. 결과

Ⅳ. 고찰

Ⅴ. 결론

참고문헌