ACR 팬텀을 이용한 Cartesian Trajectory와 MultiVane Trajectory의 비교분석 : 영상강도 균질성과 저대조도 검체 검출률 test를 사용하여

• 영문명: Comparative Analysis of Cartesian Trajectory and MultiVane Trajectory Using ACR Phantom in MRI : U sing Image I ntensity U niformity Test a nd L ow-contrast Object Detectability Test
• 발행기관: 대한방사선과학회(구 대한방사선기술학회)
• 저자명: 남순권(Nam Soon Kwon) 최준호(Choi Joon Ho)
• 간행물 정보: 『방사선기술과학』방사선기술과학 제42권 제1호, 39~46쪽, 전체 8쪽
• 주제분류: 의약학 > 방사선과학
• 파일형태: PDF
• 발행일자: 2019.02.28

영문 초록

This study conducted a comparative analysis of differences between cartesian trajectory in a linear rectangular coordinate system and MultiVane trajectory in a nonlinear rectangular coordinate system axial T1 and axial T2 images using an American College of Radiology(ACR) phantom. The phantom was placed at the center of the head coil and the top-to-bottom and left-to-right levels were adjusted by using a level. The experiment was performed according to the Phantom Test Guidance provided by the ACR, and sagittal localizer images were obtained. As shown in Figure 2, slices # 1 and # 11 were scanned after placing them at the center of a 45° wedge shape, and a total of 11 slices were obtained. According to the evaluation results, the image intensity uniformity(IIU) was 93.34% for the cartesian trajectory, and 93.19% for the MultiVane trajectory, both of which fall under the normal range in the axial T1 image. The IIU for the cartesian trajectory was 0.15% higher than that for the MultiVane trajectory. In axial T2, the IIU was 96.44% for the cartesian trajectory, and 95.97% for the MultiVane trajectory, which fall under the normal range. The IIU for the cartesian trajectory was by 0.47% higher than that for the MultiVane trajectory. As a result, the cartesian technique was superior to the MultiVane technique in terms of the high-contrast spatial resolution, image intensity uniformity, and low-contrast object detectability.

목차

Ⅰ. Introduction

Ⅱ. Material and Methods

Ⅲ. Results

Ⅳ. Discussion

Ⅴ. Conclusions

REFERENCES

키워드

Cartesian MultiVane ACR phantom Image intensity Uniformity 데카르트 다중날개 미국방사선의학회 팬텀 영상강도균질성