자기공명영상검사 시 26cm 이하 영상영역의 Multi-Transmit 기법의 유용성
A Effectiveness of Multi-Transmit Parallel Technique on Magnetic Resonance Imaging of FOV Less Than 26cm
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초록
본 연구는 유전체 효과를 줄이기 위해 26cm 영상영역 이상에서 사용하고 있는 Multi-transmit 기법을 26cm 이하에 적용하여 유용성을 알아보고자 하였다. 연구방법은 ACR 팬텀에 26cm 이하의 영상영역을 설정한 후, Multi-transmit 기법 적용 전･후 T1, T2강조영상의 균일도와 신호 대 잡음비, 영상획득시간을 비교하였다. 연구결과, 영상의 균일도와 SNR은 적용 후 유의한 차이가 없었으며, 영상획득시간은 적용 전에 비해, T1강조영상에서 46.8%, T2강조영상에서 18.9% 감소하였다. 결론적으로 Multi-transmit 기법을 26cm 이하의 얇은 부위에 적용하면, 영상의 질은 유지하면서 영상획득시간을 획기적으로 줄일 수 있어 임상적용에 유용하리라 사료된다.
Abstract
The purpose of this study was to prospectively estimate the effectiveness of multi-transmit parallel tech-nique in reduced FOV(Field of View) less than 26 cm. Homogeneity, SNR(signal to noise ratio) and acquisition time were measured and compared by setting FOV less than 26cm on the T1 and T2 weighted images using ACR phantom. The multi-transmit parallel technique resulted in significantly faster image acquisition by 46.8 % in T1 weighted images and 18.9% in T2 weighted images. The homogeneity and SNR values had no significant difference between pre and post application of the multi-transmit parallel technique. In conclusion, this study demonstrates the feasibility of multi-transmit parallel technique in FOV less than 26cm with a rapid acquisition and maintained image quality.
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