临床用肢端柔性表面线圈和相控阵线圈在小动物磁共振成像中的性能比较  

Comparative assessment of clinical extremity flexibility coil and phase array extremity coil in MR imaging for small animal

作　　者：张帆[1] 李坤成[1] 于春水[1] 常丽荣[2] 秦文[1] 

机构地区：[1]首都医科大学宣武医院医学影像部放射科,北京100053 [2]首都医科大学解剖教研室,北京100053

出　　处：《中国医学影像技术》2006年第12期1803-1804,共2页Chinese Journal of Medical Imaging Technology

基　　金：国家自然科学基金资助项目(30470519);北京市科技新星资助项目(2005B21)。

摘　　要：目的对比肢端柔性线圈和相控阵线圈非并行采集及并行采集技术在小动物实验中对图像质量的影响。方法10只Wistar大鼠,分别用西门子标配的临床用正交柔性肢端线圈和相控阵肢端线圈在同一扫描参数的条件下用于头部信号采集,同时在肢端相控阵线圈采集中采用并行采集技术再获得相同的图像,然后对三组图像选择同一层面进行SNR的比较。结果正交柔性线圈和4通道肢端相控阵线圈采集的图像信噪比有明显的差异,正交柔性线圈能获得更高的图像信噪比,而肢端相控阵线圈非并行采集与并行采集技术(R=2)所获得的图像信噪比没有差异,但采用并行采集技术能极大地减少扫描时间。结论小动物实验在线圈的选用上,线圈的填充因数对图像质量的影响更大,但相控阵线圈与并行采集技术合用可以极大地减少成像时间。Objective To compare the imaging quality of clinical extremity flexibility coil and phase array extremity coil with parallel acquisition and No-parallel acquisition techniques. Methods Ten Wistar rats were examined using extremity flexibility coil and phase array extremity coil with parallel acquisition and No-parallel acquisition techniques in identical parameter. Then compare imaging quality of different group rats brain identical slice. Resets imaging quality SNR on extremity flexibility coil was significantly superior to that on phase array extremity coil with parallel acquisition （R= 2） and No-parallel acquisition techniques, image quality was the same with the phase array extremity coil with parallel acquisition and Noparallel acquisition techniques. But scan time could be decreased by using phase array extremity coil with parallel acquisition techniques. Conclusion By increasing filling factor, extremity flexibility coil can get higher SNR than phase array extremity coil. But scan time could be decreased by using phase array extremity coil with parallel acquisition techniques.

关 键 词：磁共振成像 相控阵线圈 弹性线圈 

分 类 号：R-332[医药卫生] R445.2