McElveen J T, Saunders J E, Meisler W J, Grist T M, Boyko O B
Department of Surgery, Duke University Medical Center, Durham, North Carolina 27710.
Am J Otol. 1991 Sep;12(5):323-8.
Cerebral angiography has become essential in the evaluation and management of extensive skull-base lesions. However, with a 2.6 percent incidence of neurologic complications and a 0.3 percent incidence of permanent neurologic deficits associated with cerebral angiography, the procedure is not without risk. Recent advances in magnetic resonance angiography (MRA), allow one to visualize the skull-base vasculature without need of intravenous contrast injection or radiation exposure. Our initial experience in visualizing the normal vascular anatomy and pathology at the base of skull with this new imaging modality is presented. Two different MRA techniques were used: (1) thin-slice two-dimensional gradient echo pulse sequence acquisition with three-dimensional projection reconstruction, and (2) two-dimensional phase contrast angiography. The specifics of these techniques and their usefulness in the evaluation of lesions involving the skull base are discussed and demonstrated.
脑血管造影术在广泛的颅底病变评估和治疗中已变得至关重要。然而，脑血管造影术伴有2.6%的神经并发症发生率以及0.3%的永久性神经功能缺损发生率，该操作并非毫无风险。磁共振血管造影（MRA）的最新进展使人们无需静脉注射造影剂或接受辐射即可可视化颅底血管系统。本文介绍了我们使用这种新成像方式可视化颅底正常血管解剖结构和病变的初步经验。我们使用了两种不同的MRA技术：（1）通过三维投影重建的薄层二维梯度回波脉冲序列采集，以及（2）二维相位对比血管造影。本文讨论并展示了这些技术的细节及其在评估累及颅底病变中的实用性。
