肝脏MR四种扫描序列比较

Comparison of Four MR Scanning Sequence for Liver

摘要: 目的探讨肝脏MR扫描序列的最佳选择。方法对29例患者采用四种(SE、FLASH、Tse₁₁,Tse₂₃)扫描序列进行肝脏MR扫描,测量和计算图像的信噪比(SNR)和对比度噪声比(CNR),同时对影像进行视觉评价。结果FLASH和TSE₂₃序列优片率高于SE和Tse₁₁序列:T₁加权像中FLASH序列的SNR和CNR均优于SE序列;T₂加权像中Tse₂₃序列的SNR和CNR均不及Tse₁₁序列。结论肝脏MR扫描FLASH序列可作为首选,Tse₂₃序列作为辅助使用。

Abstract: Purpose: To study the best MR sequence for liver examination. Methods: Scanning 29 patient's liver with four sequence (SEMSH, Tse₁₁, Tse₂₃),measure and calculate Ihe SNR and CNRmeanwhile evaluate the images with vision. Results: The first-string film ratio of FLASH and Tse₂₃ aresuperior to that of SE and Tse₁₁ sequence; On T₁ weighted images, the SNR and CNR of FLASH is superiorto that of SE sequence,on T₂ weighted images, the SNR and CNR of Tse₂₃ is lower than Tse₁₁ saquence.Conclusion : The FLASH sequence is the first choice for liver MR examination and the Tse₂₃ sequence canassist it to get more information.