Honda N, Machida K, Mamiya T, Takahashi T, Kamano T, Muramatsu M, Kashimada A, Inoue Y, Yamazaki M, Uematsu K
Department of Radiology, Saitama Medical Center, Saitama Medical School.
Nihon Igaku Hoshasen Gakkai Zasshi. 1992 Nov 25;52(11):1521-8.
Two-dimensional time-of-flight magnetic resonance angiography (2D TOF MRA) of mediastinal and pulmonary hilar vessels was performed in 10 patients, seven men and three women with a mean age (range) of 65.7 (48-88) years. The rate of visualization of the vessels and the diagnostic ability of 2D TOF MRA were assessed in comparison with contrast-enhanced CT. A radiofrequency-spoiled gradient echo sequence (SPGR) was used during repeated breath-holding (8-27 seconds) in coronal (8 patients) and axial (2 patients) imaging planes on a 1.5 Tesla superconducting scanner under the following conditions: repetition time/echo time/flip angle/excitation: 25-33/7-8 ms/45 degrees/1, field-of-view: 30 x 30 cm, slice thickness: 2.5 mm, 32 slices, 256 (frequency) x 192 (phase) matrix, with gradient moment nulling technique. Visualization sufficient to enable diagnosis of the vascular lesion was obtained in 95 (52%) vessels, mere visualization in 63 (35%), and non-visualization in 24 (13%) of the 182 evaluable vessels. The rates of good visualization of pulmonary hilar vessels (26/86, 30%) and veins (26/48, 54%) were significantly lower than that of arteries (43/48, 90%, p < 0.05). The sensitivity and specificity of 2D TOF MRA were 77% (10/13) and 100% (83/83), respectively, in 96 evaluable vessels of nine patients. 2D TOF MRA of mediastium and pulmonary hili is clinically feasible, and may be useful because of its high specificity.
对10例患者（7例男性，3例女性，平均年龄[范围]为65.7[48 - 88]岁）进行了纵隔和肺门血管的二维时间飞跃磁共振血管造影（2D TOF MRA）。与增强CT相比，评估了血管的显示率和2D TOF MRA的诊断能力。在1.5特斯拉超导扫描仪上，于冠状面（8例患者）和横断面（2例患者）成像平面进行重复屏气（8 - 27秒）时，使用射频扰相梯度回波序列（SPGR），条件如下：重复时间/回波时间/翻转角/激励：25 - 33/7 - 8毫秒/45度/1，视野：30×30厘米，层厚：2.5毫米，32层，256（频率）×192（相位）矩阵，并采用梯度矩归零技术。在182条可评估血管中，95条（52%）血管获得了足以诊断血管病变的显示，63条（35%）仅能显示，24条（13%）未显示。肺门血管（26/86，30%）和静脉（26/48，54%）的良好显示率显著低于动脉（43/48，90%，p<0.05）。在9例患者的96条可评估血管中，2D TOF MRA的敏感性和特异性分别为77%（10/13）和100%（83/83）。纵隔和肺门的2D TOF MRA在临床上是可行的，因其高特异性可能具有实用价值。
