腰椎软骨终板的MR三维超短回波时间T2*mapping定量评价

UTE-T2*mapping quantitative evaluation of lumbar cartilage endplate

目的：应用磁共振三维超短回波时间（ultrashort echo time, UTE）多回波脉冲序列T2＊mapping定量评价腰椎软骨终板。材料与方法对21名青年志愿者进行MR UTE多回波脉冲序列扫描，将图像质量按由劣至优顺序分为Ⅰ、Ⅱ、Ⅲ级。在T2＊mapping伪彩图上测量L1～L5椎体10个上、下软骨终板的T2＊值。结果21例腰椎210个软骨终板图像质量均为Ⅲ级。腰椎上、下软骨终板T2＊值平均值分别为（19.76±8.41） ms和（30.17±17.25） ms，两者差异有统计学意义（t=-5.56， P〈0.01）。结论磁共振三维超短TE多回波脉冲序列可用于腰椎软骨终板的定量研究。

Objective：To explore the feasibility of quantitative evaluation of lumbar intervertebral cartilage endplate using 3 dimensional multi-echo ultrashort echo time pulse sequence MR imaging. Materials and Methods：The images of lumbar cartilage endplate （CEP） were obtained from twenty one young volunteers by using multi-echo ultrashort echo time pulse sequence, and the image quality were evaluated from grade I to grade III in the order from poor to excellent. The T2＊values of both upper and lower CEPs were measured at the lumbar artiifcial color maps from L1/L2 to L5/S1. Results：The 210 CEP images were graded as grade III. The average T2＊value of upper and lower CEP was （19.76±8.41） ms, and （30.17±17.25） ms, respectively. The difference of CEP T2＊value between upper and lower was statistically signiifcant （t=-5.56, P〈0.01）. Conclusion：Three dimensional multi-echo ultrashort echo time pulse sequence MR imaging provides an effective approach for the quantitative study of lumbar CEP.