目的探讨磁共振3DFIESTA及3DT₁SPGR序列显示舌咽神经及血管压迫的诊断价值。方法对5例(10根神经)舌咽神经痛患者及17位(34根神经)健康志愿者共44根舌咽神经同时行3DFIESTA及3DT₁SPGR两序列成像，并对图像进行3D后处理重建，对图像质量及血管与舌咽神经的关系进行分析比较。结果两种序列显示舌咽神经图像质量比较，3DFIESTA序列优质图像43根神经(98%)明显多于3DT₁SPGR序列19根神经(43%)，而劣质图像3DT₁SPGR序列25根神经(57%)，FIESTA序列1根神经(2%)。3DFIESTA序列图像质量明显好于3DT₁SPGR序列(χ²=31.44，P<0.001)。5例舌咽神经痛患者中血管紧贴舌咽神经者6根神经(60%)，而健康志愿者血管紧贴舌咽神经者8根神经(23%)，舌咽神经痛患者血管紧贴舌咽神经者较健康志愿者多，且与临床表现相符合。结论在舌咽神经检查中利用3DFIESTA序列显示舌咽神经图像质量较好，同时做3DT₁SPGR序列，利用其血管呈现高信号的特点，对舌咽神经痛血管紧贴神经的诊断更加有益。

Objective To evaluate the utility of MRI in demonstrating the glossopharyngeal nerves and neurovascular relationships with 3D FIASTA and 3D T1 SPGR sequence. Methods A total of 17 volunteers, 5 patients with glossopharyngeal neuralgia underwent three-dimensional fast imaging employing steady-state acquisition (3D FIESTA) and three-dimensional time of flight spoiled gradient recalled acquisition (3D T1 SPGR) MR imaging. Image quality, anatomical features, neurovascular relationships of the glossopharyngeal caused by neurovascular compression were analyzed from multi-planar reconstruction (MPR) images. Results The image quality of 3D FIESTA sequence is superior to that of 3D T1 SPGR sequence. The number of superior quality is 43/44(98%) with 3D FIESTA and 19/44(43%) with 3D T1 SPGR. The number of poor quality is 25(57%) with 3D T1 SPGR and 1(2%) with 3D FIESTA. The glossopharyngeal nverves and the relationship between cranial nerves and vessels could be demonstrated clearly by 3D FIESTA images combined with 3D T1 SPGR MPR images. Among the 5 cases of glossopharyngeal neuralgia, blood vessels were found to be in contact with the glossopharyngeal nerve in 6/10(60%), however, in 8/34(23%) in the 17 volunteers. Conclusions Use of 3D-FIESTA sequence enables accurate identification of glossopharyngeal nerves. The neurovascular relationships and abnormal changes caused by neurovascular compression can be demonstrated by 3D-FIESTA sequence combined with 3D T1 SPGR sequence.