英语语法分析

Objective to improve the MRI diagnosis of Postoperative discitis.

目的提高术后椎间盘炎的MRI诊断水平。

Objective to probe into the causes, symptoms and treating methods of discitis.

目的探讨间盘炎的发病原因，临床表现和治疗手段。

Objective to evaluate MRI in the diagnosis of postoperative intervertebral discitis.

目的探讨MRI对术后椎间盘炎的诊断价值。