英语语法分析

Evaluation of MRI included decrease in signal intensity of discs, posterior disc protrusion, disc space narrowing, and foraminal stenosis using 2 to 4 numerical grades.

MRI使用2 - 4数字评分评估包括椎间盘信号强度降低，椎间盘向后突出，椎间隙狭窄，以及椎间孔狭窄。

Foraminal mirror technique compared with less trauma, less bleeding, anesthesia is more convenient, faster postoperative recovery and economic burden lighter obvious advantages.

椎间孔镜技术相比，具有创伤小，出血少，更为方便，术后恢复快、经济负担轻的优点。