Ikawa F, Sumida M, Uozumi T, Kuwabara S, Kiya K, Kurisu K, Arita K, Satoh H
Department of Neurosurgery, Hiroshima University School of Medicine, Japan.
Surg Neurol. 1994 Oct;42(4):287-92. doi: 10.1016/0090-3019(94)90394-8.
Magnetic resonance angiography (MRA) can be divided into two types: namely, the phase-contrast (PC) method and the time-of-flight (TOF) method. The purpose of this study is to determine which method is better suited to demonstrate cerebral aneurysms. In a total of 27 cerebral aneurysms confirmed by cerebral angiography, both three-dimensional (3-D) PC and 3-D TOF methods were performed, and the corresponding findings were compared with conventional cerebral angiographic findings. Aneurysm visualization was grouped into three categories: "good" when clearly distinguishable, "fair" if distinguishable when reconstructed, and "poor" if completely undistinguishable. All MRAs were independently interpreted by two neurosurgeons in our institute. Sensitivity was 92.6% when MRA was performed with the TOF method, whereas it was 70.4% when performed with the PC method. In conclusion, the TOF method was more useful for demonstrating the aneurysms than the PC method due to its higher spatial resolution and shorter imaging time.
磁共振血管造影（MRA）可分为两种类型：即相位对比（PC）法和飞行时间（TOF）法。本研究的目的是确定哪种方法更适合显示脑动脉瘤。对经脑血管造影证实的27例脑动脉瘤患者，同时采用三维（3-D）PC法和3-D TOF法进行检查，并将相应结果与传统脑血管造影结果进行比较。动脉瘤的显影分为三类：“良好”为清晰可辨，“一般”为重建后可辨，“差”为完全无法分辨。所有MRA均由我院两名神经外科医生独立解读。采用TOF法进行MRA检查时，敏感性为92.6%，而采用PC法时为70.4%。总之，由于TOF法具有更高的空间分辨率和更短的成像时间，因此在显示动脉瘤方面比PC法更有用。
