眶内肿瘤的MRI技术研究

目的探讨ＭＲＩ检查技术在诊断眶内肿瘤中的作用。材料与方法对４８例眶内肿瘤进行ＳＥ序列、ＩＲ序列、脂肪／水抑制成像以及ＭＲ增强。结果多轴向成像使定位诊断准确，多序列检查结合不同组织的ＭＲＩ信号强度变化对常见肿瘤的定性诊断帮助很大。结论ＳＥ序列横断位和冠状位是最重要的检查技术；ＩＲ序列及Ｗ／ＦＩ能更准确地显示肿瘤的形态及大小，平行于视神经矢状面成像有助于对视神经类肿瘤的确切定位，ＭＲ增强对血管性肿瘤的定性诊断作用较大。

Technical Study of Intra-orbital Tumor Using MRI

Purpose To investigate the technicality of MRI in the diagnosing intra-orbital tumor. Materials and methods Forty-eight cases of intra -orbital were evaluated by spin - echo sequence, inversion - recovery sequence I fat/water suppression and paramagnetic contrast enhancement. Results With multi-planar capability MRI was able to detect all the intra - orbital tumor, Examined with multi - sequence combined with specific signal intensity of tissues, it was possible to make specific diagnoses in common cases by MRI. Conclusion Transaxial and coronal section of spin-echo sequence is the most important I Inversion-recovery sequence and fat/water - suppression can expose spatial dimension and shape of the tumor precisely1Sagittal section of parallel to the optic nerve helped decide correct location of tumor. Contrast -enhancement may prove to be important in recognition of the hemangioma.