【摘要】 目的评价表面线圈信号校正(surface coil intensity correction,SCIC)技术在脊柱转移瘤MRI中的应用价值。资料与方法本研究包括3个水模成像和对50例患者(80个转移灶)临床研究,所有成像均采用快速自旋回波(FSE)T1WI和T2WI采用或未用SCIC进行扫描。用信号强度变异系数对水模T1WI和T2WI采用或未用SCIC扫描所得到的信号强度进行比较,而脊柱转移瘤用图像质量分数,对其T1WI和T2WI采用或未用SCIC扫描的图像进行评价。结果采用SCIC进行T1WI和T2WI比不用SCIC能更好地显示脊柱转移瘤。采用或不用SCIC进行T1WI扫描的水模图像信号强度变异系数分别为18.99%和53.36%;采用或不用SCIC进行T2WI扫描的水模图像信号强度变异系数分别为22.77%和53.58%。采用SCIC进行扫描的脊柱转移瘤图像质量(病灶界面和病灶内部细节)明显高于不用SCIC的图像质量(R=0.7493,P<0.05;R=0.7491,P<0.05;R=0.7635,P<0.05;R=0.7155,P<0.05)。结论采用SCIC MRI比不用SCIC能更好地提高脊柱转移瘤图像的质量,能更好地探测和评估脊柱转移瘤。更多还原

【Abstract】 Objective To evaluate the clinical application of surface coil intensity correction(SCIC)in MRI of spinal metastases.Materials and Methods 3 phantoms and 50 patients with 80 spinal metastases were included in this study.Fast spin echo T1-and T2-weighted MRI with and without SCIC were performed for all of the phantoms and patients.Phantoms were evaluated by means of variance to mean ratio of signal intensity on both T1-and T2-weighted MRI obtained with and without SCIC.Spinal metastases were evaluated by means of image quality scores on both T1-and T2-weighted MRI obtained with and without SCIC.Results Spinal metastases are better demonstrated on MRI with SCIC technique than on MRI with conventional surface coil technique.The variance to mean ratio of signal intensity is 53.36% for original T1-weighted MRI and 53.58% for original T2-weighted MRI.The variance to mean ratio of signal intensity is reduced to 18.99% for T1-weighted MRI with SCIC and 22.77% for T2-weighted MRI with SCIC.The overall image quality scores(interface conspicuity of lesion and details of lesion)were significantly higher than those of original MRI,R=0.7493,P<0.05;R=0.7491,P<0.05;R=0.7635,P<0.05;R=0.7155,P<0.05.Conclusion SCIC in MRI of spinal metastases provides improvements in image quality to better detect and to assess spinal metastases than original MRI.更多还原