3D-TOF-MRA 在原发性三叉神经痛微血管减压术中的应用

目的：探讨磁共振成像技术在原发性三叉神经痛微血管减压术前诊断中的应用价值。方法38例原发性三叉神经痛患者经过三维时间飞跃法磁共振血管成像序列（3D-TOF-MRA）检查。结果38例患者中术前序列图像上显示血管神经压迫症状侧阳性率89．5％（34／38），非症状侧阳性率15．8％（6／38），两侧阳性率差异有统计学意义（P ＜0．05）；手术中见周围血管压迫神经者36例（94．7％），未压迫神经者2例（5．3％），3D-TOF-MRA 诊断符合率97．1％（33／34），术后症状消失或缓解37例（97．4％）。结论3D-TOF-MRA 可清楚地显示三叉神经与责任血管的关系，在原发性三叉神经痛微血管减压术术前诊断及术中显微定位中具有较高的临床应用价值。

Application of three-dimensional time of flight magnetic resonance angiography in microvascular decompression for idiopathic trigeminal neuralgia

Objective To discuss the application value of three-dimensional time of flight mag-netic resonance angiography（3D-TOF-MRA）in microvascular decompression（MVD）for idiopathic trigemi-nal neuralgia（ITN）.Methods Thirty-eight patients with ITN received 3D-TOF-MRA.Result Preopera-tive 3D-TOF-MRA sequence images showed that the positive rate of the side of symptomatic neurovascular compression was 89.5%（34 /38）and the positive rate of non-symptomatic side was 15.8%（6 /38）.The difference in positive rates between the two sides was significant（P 〈0.05）.During the operation,there were 36 cases（94.7%）with neurovascular compression and 2 cases（5.3%）without it.The diagnostic ac-cordance rate of 3D-TOF-MRA was 97.1%（33 /34）.After the operation,the symptoms were disappeared or relieved in 37 cases（97.4%）.Conclusion 3D-TOF-MRA can clearly reveal the relationship between the trigeminal nerve and responsible vessels,which is of high clinical value for the preoperative diagnosis and micro-positioning in MVD for ITN.