Earticle

초록

영어

Different R-R intervals over cardiac cycles can affect the volume data and stair-step artifacts (SSA) could be developed. However, it could be detected even in CT images obtained using the data from the same R-R intervals. We thus hypothesized cradle sagging during the scan could affect the development of SSA. CT scan of pulsating cardiac phantom with straight artificial vessels was performed using 64 MDCT in retrospective ECG gating. Both the phantom and 10-60kg standard weights at 10 kg intervals were placed on the cradle. CT images were obtained at the three different points with the movement of the cradle, within the similar locations of the heart at a feet-first protocol. Tilt angles of the cradle were measured using a digital inclinometer and scanned phantom. The presence of SSA was assessed by two independent radiologists using curved multi-planar reconstructed (MPR) images. Tilt angles at each point showed statistically significant correlation with the increased weights on the cradle (r=0.91, 0.97 and 0.88 at each point, P< 0.05). Moreover, SSA were perceived more in the CT images obtained at the cradle with higher tilt angle. In rotated vertically curved MPR images, sagittal images showed more severe SSA than coronal images. Tilt angle of the cradle showed significant correlation with the weights of phantom, and SSA were noted more when higher tilt angle was detected. To reduce SSA, cradle sagging should be minimized to avoid the tilting of the cradle which might affect the CT volume data.

목차

Abstract
Ⅰ. 서론
Ⅱ. 대상 및 방법
2.1 연구 대상 및 사용장비
2.2 검사 방법
2.3 평가 방법
Ⅲ. 결과
3.1 팬텀 영상 평가 결과
3.2 무게에 따른 테이블 기울기 평가결과
Ⅳ. 고찰
Ⅴ. 결론
참고문헌

키워드

저자

• 이상우 [ Sang-Woo Lee | 서울아산병원 영상의학팀 ]
• 강준원 [ Joon-Won Kang | 서울아산병원 영상의학과 ]
• 구현정 [ Hyun-Jung Koo | 서울아산병원 영상의학과 ]

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  대한디지털의료영상학회논문지 [Korean Journal of Digital Imaging in Medicine]

• 간기

  연3회

• pISSN

  1976-7641

• 수록기간

  1995~2025

• 십진분류

  KDC 510 DDC 610