对比MS BLOCK T1rho、MS HS8 T1rho及3D BLOCK T1rho序列肝脏MR图像质量及T1rho值

Comparison of image quality and T1rho value in liver MRI using MS BLOCK T1rho, MS HS8 T1rho and 3D BLOCK T1rho sequences

目的对比分析MSBLOCKT1rho、MSHS8T1rho及3DBLOCKT1rho序列肝脏MR图像质量及T1rho值。方法分别采用MSBLOCKT1rho(n=33)、MSHS8T1rho(n=34)及3DBLOCKT1rho(n=22)序列对40名成年健康志愿者行腹部MR扫描,比较3种序列肝脏图像质量及T1rho值,以Pearson相关分析观察3种序列T1rho值的相关性。结果3种序列的图像质量评分及T1rho值差异均有统计学意义(P均<0.01),其中MSHS8T1rho图像质量评分及T1rho值均高于其他2种序列(P均<0.05)。MSBLOCKT1rho序列图像的T1rho值与MSHS8T1rho、3DBLOCKT1rho均呈正相关(r=0.59、0.73,P均<0.05),MSHS8T1rho的T1rho值与3DBLOCKT1rho呈正相关(r=0.72,P<0.05)。结论MSBLOCKT1rho、MSHS8T1rho及3DBLOCKT1rho序列均可应用于健康人肝脏MR成像,但用于诊断肝脏疾病时需设定不同的参考值范围。

Objective To compare image quality and T1rho value of liver MRI using MS BLOCK T1rho, MS HS8 T1rho and 3 D BLOCK T1rho sequences. Methods Totally 40 healthy volunteers were enrolled. MR scanning was performed using MS BLOCK T1rho(n=33), MS HS8 T1rho(n=34) and 3D BLOCK T1rho(n=22) sequences. The image quality and T1rho value were compared among these sequences. The correlation of T1rho value among three sequences were evaluated with Pearson correlation analysis. Results Statistical differences were found in image quality and T1rho value among three sequences(both P<0.01). The image quality and T1rho value of MS HS8 T1rho sequence were higher than those of the other two sequences(all P<0.05). T1rho value of MS BLOCK T1rho was positively correlated with MS HS8 T1rho and 3D BLOCK T1rho(r=0.59, 0.73, both P<0.05), and MS HS8 T1rho was positively correlated with 3D BLOCK T1rho(r=0.72, P<0.05). Conclusion MS BLOCK T1rho, MS HS8 T1rho and 3D BLOCK T1rho sequences can be used in MR imaging in healthy human. However, different references ranges should be set for diagnosis of liver diseases.