周围门控黑血技术显示颈动脉粥样斑块图像质量评估简

目的评估周围门控黑血技术显示颈动脉粥样斑块图像质量，探讨该技术显示颈动脉粥样斑块的价值。方法14例颈动脉斑块的患者和10例正常志愿者行嗣共振检查。成像序列包括轴位T1WI、周围门控黑血T1WI序列及增强后轴位T1WI脂肪抑制序列。比较常规T1WI、黑血T1WI及增强后T1WI序列图像的信号噪声比。每个病例选取颈动脉分叉上下5个层面，对黑血T1WI、常规T1WI及增强T1WI图像质量进行评分，将评分结果进行两两配对t检验，比较三种方法的差异。结果黑血T1WI、常规T1WI及增强T1WI的图像信号噪声比分别为8．23±0．42、10．22±0．87、8．51±0．20，两两配对t检验均无统计学差异（P〉0．05）。黑血T1WI、常规T1WI及增强T1WI的平均评分分别为5．78±0．46、4．34±1．70和3．72±1．68。经t检验，黑血T1WI与常规T1WI具有显著性差异（P〈0．05）：黑血T1WI与增强T1WI具有显著性差异（P〈0．05）：常规T1WI与增强T1WI差异无统计学意义（P〉0．05）。结论周围门控黑血技术用于颈动脉斑块成像是可行的，且对血管管壁的显示优于常规序列，为预测斑块稳定性提供成像基础。

Image Quality Evaluation of Cervical Arterial Plaque by Peripheral Pulse Gating and Black Blood Techniques

Objective To evaluate the image quality of cervical arterial plaque by the application of peripheral pulse gating and black blood tectmique in MRI. Methods 14 cases with cervical arterial plaque and 10 volunteers were performed with MRI scanning . The scanning plan included axial T1WI. black blood T1WI and contrast-enhanced T1WI FS. Five layers close to cervical arterial bifurcation were selected. The SNRs and scores of T1WI, black blood T1WI and contrast-enhanced T1WI were recorded, and the differences of three sequences were analyzed by two sanlple t-test. Results The SNRs of black blood T1WI, T1WI and contrast-enhanced T1WI black blood were 8.23 ± 0.42, 10.22 ± 0.87, 8.51 ± 0.20 respectively, and there was no significant difference （P〉0.05）. The average scores of black blood T1WI, T1WI and contrast-enhanced T1WI black blood were 5.78 ± 0.46, 4.34 ± 1.70 and 3.72 ± 1.68 respectively. There was significant difference between black blood TIWI and T1WI （P〈0.05）. There was significant difference between blood T1WI and contrast-enhanced T1WI （P〈0.05）. But there was no significant difference between T1WI and contrast-enhanced T1WI （P〉0.05）. Conclusion It is feasible to utilize peripheral pulse gating and black blood technique in the display of cervical arterial plaque in MRI, and this technique has has extensive prospect in predicting the stability of cervical arterial plaque.