低场强MR诊断垂体瘤的价值

LOW FIELD STRENGTH MR DIAGNOSIS OF PITUITARY TUMORS

目的总结分析28例垂体瘤的低场强MRI表现。方法使用0.23T磁共振扫描仪,回顾性28例经手术和病理证实的垂体瘤的MRI表现,结合相关文献,对MRI表现进行归纳。结果垂体巨腺瘤23例在T1WI上为低、等信号,T2WI呈中等高、高信号,占位效应明显,常向上累及视交叉(69%)及向两侧侵袭海绵窦(43%);5例微腺瘤在T1WI上多为低、等信号,T2WI为等高信号。结论低场强MRI对垂体瘤有很高的诊断价值,对形态学改变不明显的垂体微腺瘤,结合GD-DTPA可获得满意诊断结果。

Objective To analyze and summarize the MRI features of 28 pituitary adenomas under the low field intensity. Methods 28 cases of pituitary adenomas in MRI features were analyzed retrospectively by using 0. 23T MRI. To summarize the MRI features by referring some related specialities. Results 23 cases of Giant pituitary adeno- ma were presented to be low signal or isosignal in T1WI, middle signal or high signal in T2WI, with obvious mass effect, suggested to be 69% chiasma opticum by upward cumulation and 43% cavernous sinus hitted from two sides. 5 cases of microadenoma were presented to be low signal or isosignal in T1WI and high signal in T2WI. Conclusion MRI in low field intensity played an important role in diagnostic value in pituitary adenomas. As to pituitary microadenoma with little change in morphology, we can obtain the satisfactory conclusion by referring GD - DTPA.