敏感性编码技术在腹部磁共振快速成像中的应用

目的　研究敏感性编码 (SENSE)技术在腹部快速MRI检查中的临床应用。方法　对 15例患者的腹部进行常规快速自旋回波 (TSE)序列T2 加权成像 (T2 WI)、选择性部分反转恢复 (SPIR)序列T2 WI、快速场回波 (FFE)序列T1加权成像 (T1WI)以及在保持参数不变时联合应用SENSE成像。观察应用SENSE后 ,扫描时间的缩短情况以及图像的对比度变化情况。结果　应用SENSE成像当缩减因子为 2 .0时 ,腹部每个序列扫描时间缩短约 43 %～ 5 0 % ,而图像的对比度不变。结论　联合应用SENSE技术能显著缩短扫描时间 ,而保持图像对比度基本不变。SENSE技术在磁共振快速成像中的应用前景广阔。

Applications of Sensitivity Encoding Technique for Fast Abdominal MRI

Objective To investigate the clinical application of sensitivity encoding technique(SENSE)for fast MRI in abdominal imaging. Methods Conventional sequences of abdominal MRI followed by combined SENSE with same parameters were performed in 15 patients. The reduction of scan time and contrast resolution of images with and without SENSE were measured. Results After applying SENSE technique with reduction factor 2.0, the scan time of each conventional sequence in abdominal imaging decreased 43-50 percentage of the counterparts without SENSE. Meanwhile, contrast resolution on SENSE imaging almost kept the same as that on conventional sequences. Conclusion SENSE technique can significantly shorten scan time and keep the high image quality. SENSE technique is a promising concept in fast magnetic resonance imaging.