MR T_2-mapping成像对诊断早期膝关节软骨损伤的临床应用价值

The clinical research of MR T_2-mapping on the diagnosis of early knee articular cartilage injury

目的：探讨MR T2-mapping成像对诊断早期膝关节关节软骨损伤的应用价值。方法：对照组10例，病例组20例，运用T2-mapping成像分别测量对照组关节软骨的T2值和病例组相对应于半月板撕裂处关节软骨的T2值，并进行统计学分析。结果：20例患者半月板撕裂中17例关节软骨表面T2值范围46．3～62．3ms，平均53．36±5．06ms；对照组关节软骨表面T2值范围37．6-43．8ms，平均41．18±1．66ms。病例组与对照组关节软骨表面T2值有差异且具显著性统计学意义（P〈0．05）。结论：T2-mapping成像能发现没有形态学改变的损伤性关节软骨组织成分的改变，对诊断早期膝关节软骨损伤有很高的临床参考价值。

Objective： To explore the value of MR T2-mapping in early articular cartilage injury of knee. Methods： 30 cases were divided into 2 groups： case group （n= 20） with meniscus tear and control group （n= 10）. T2 value were measured respectively by T2-mapping imaging in comtroes and case group in articular cartilage corresponding meniscus tear. Statistical differences were analyzed. Results： T2 value of surface of articular cartilage were 46.3 - 62.3 ms in case group, with an average of 53.36 ± 5.06 ms;T2 value of surface of articular cartilage were 37.6-43.8 ms in control group, with an average of 41.18 ± 1.66 ms. There was a significant difference in T2 value between case group and control group. Conclusion：T2-mapping imaging can indicate component abnormality in early articular cartilage injury without morphology change, and has a high clinical value in the diagnosis of early knee articular cartilage injury.