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3T에서 뇌 운동피질의 기능적 자기공명영상 연구 : Gradient-Echo와 Spin-Echo EPI의 비교
Functional MR Imaging of Cerebral Motor Cortex on 3 Tesla MR Imaging : Comparison between Gradient and Spin-Echo EPI Techniques
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- 발행기관
- 대한디지털의료영상학회 바로가기
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- 간행물
- 대한디지털의료영상학회논문지 바로가기
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- 통권
- Volume 9 Number 2 (2007.12)바로가기
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- 페이지
- pp.31-38
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- 저자
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- 언어
- 한국어(KOR)
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- URL
- https://www.earticle.net/Article/A482944
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원문정보
초록
- 영어
- To evaluate the accuracy and extent in the localization of cerebral motor cortex activation using a gradient- echo echo planar imaging(GE-EPI) compared to spin-echo echo planar imaging(SE-EPI) on 3T MR imaging. Functional MR imaging of cerebral motor cortex activation was examined in GE-EPI and SE-EPI in five healthy male volunteers. A right finger movement was accomplished with a paradigm of 6 task and rest periods and the cross-correlation was used for a statistical mapping algorithm. We evaluated any sorts of differences of the time series and the signal intensity changes between the rest and task periods obtained with two techniques. The qualitative analysis was distributed with activation sites of large veins and small veins by using two techniques and was found that both the techniques were clinically useful for delineating large veins and small veins in fMRI. Signal intensity change of the rest and activation periods provided similar activations in both methods(GE-EPI : 0.93±0.11, SE-EPI : 0.80±0.15) but 仕le signal intensity in GE-EPI(133.95±15.76) was larger than in SE-EPI(74.5± 18.90). The average SNRs of EPI raw data were higher at SMA in SE-EPI(48.54±12.37) than GE-EPI(41.4±12.54) and at Ml in SE-EPI(43.24±11.77) than GE_EPI(38.27±6.53). The localization of activation voxds of the GE-EPI showed a larger vein but the SE-EPI generally showed small vein. Then the analysis results of the two techniques were used for a statistical paired student t-test. SE-EPI was found clinically useful for localizing the cerebral motor cortex activation on 3.0T, but showed a little different activation patterns compared to a GE-EPI. In conclusion, SE-EPI may be feasible and can detect true cortical activation from capillaries and GE-EPI can obtain the large veins in the motor cortex activation on 3T MR imaging.
목차
Abstract
I. 서론
II. 대상 및 방법
1. 대상 및 영상 획득
2. 과제 패러다임
3. 통계 및 데이터 분석
III. 결과
IV. 고찰
V. 결 론
참고문헌
저자
간행물 정보
발행기관
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- 발행기관명
- 대한디지털의료영상학회 [대한디지털의료영상학]
- 설립연도
- 1995
- 분야
- 의약학>방사선과학
- 소개
- 대한디지털의료영상학회는 디지털 영상 기술에 관한 연구와 실험 결과를 임상에 적용하여 영상의학 및 진단 방사선 기술 분야의 발전에 기여함을 목적으로 한다.
간행물
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- 간행물명
- 대한디지털의료영상학회논문지 [Korean Journal of Digital Imaging in Medicine]
- 간기
- 연3회
- pISSN
- 1976-7641
- 수록기간
- 1995~2026
- 십진분류
- KDC 510 DDC 610
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