Umehara F, Kamishima K, Kashio N, Yamaguchi K, Sakimoto T, Osame M
Third Department of Internal Medicine, Faculty of Medicine, Kagoshima University, Japan.
Neuroradiology. 1995 Jul;37(5):353-5. doi: 10.1007/BF00588010.
A combination of MRI, MR angiography and MR tomographic angiography (MRTA) was used to study the relationship of the root exit zone of the trigeminal nerve to surrounding vascular structures in seven patients with trigeminal neuralgia (TN) and ten patients with no evidence at a lesion in this region. MRTA is the technique for showing the relationship between vessels, cranial nerves and brain stem. MRTA clearly demonstrated the presence of a vessel at the root exit zone of the trigeminal nerve in all patients with TN. In the ten other patients, examination of 20 trigeminal nerves revealed that only one nerve (5%) was in contact with a vessel at the root exit zone. This study supports vascular compression of trigeminal nerves as a cause of TN, and demonstrates the value of MRTA as noninvasive technique for demonstrating compression.
采用磁共振成像（MRI）、磁共振血管造影（MRA）和磁共振断层血管造影（MRTA）相结合的方法，对7例三叉神经痛（TN）患者和10例该区域无病变证据的患者进行研究，以探讨三叉神经根部出口区与周围血管结构的关系。MRTA是一种用于显示血管、颅神经和脑干之间关系的技术。MRTA清楚地显示了所有TN患者三叉神经根部出口区均有血管存在。在另外10例患者中，对20条三叉神经进行检查发现，只有1条神经（5%）在根部出口区与血管接触。本研究支持三叉神经血管压迫是TN的病因，并证明了MRTA作为一种显示压迫的无创技术的价值。
