Barzi F, Panzarola P, Regi L, Corneli P, Mosca S, Maselli A, Pozzilli P, Lupattelli L, Cao P G, Lenti M
Istituto di Radiologia, Università di Perugia.
Radiol Med. 1994 Nov;88(5):582-7.
The diagnostic role of Magnetic Resonance Imaging (MRI) was investigated in the study of abdominal aortic aneurysms and compared with that of Computed Tomography (CT) and digital subtraction angiography (DSA). Magnetic Resonance angiography (MRA) was performed on 21 patients with radiologically proved abdominal aortic aneurysms, using a superconductive 1.5 T magnet (GE, Signa Advantage); the 2D TOF technique with gradient-echo sequences was used (SPGR: FA 45-60 degrees, TR/TE 33/7, ST 2 mm, 1 nex, 256 x 128 matrix, inferior presaturation and flow compensation). The images acquired on the axial plane were reconstructed according to MIP and rotated on the z-axis from +90 degrees to -90 degrees. In all cases SE 2D T1- and T2-weighted sequences were acquired on the axial plane. Twelve patients were examined with MRI, CT and DSA; 3 with MRI and CT; 2 with MRI and DSA and finally 4 with MRI only. The radiologic studies were then reviewed blind and the results of the different methods compared. In all cases MRI yielded similar information to CT and DSA as to aneurysm extent and size, vessel involvement, status of visceral, iliac and common femoral arteries and finally the conditions of perianeurysmatic tissues. The authors conclude that MRI is a useful and accurate technique for the preoperative examination of abdominal aortic aneurysm patients.
本研究探讨了磁共振成像（MRI）在腹主动脉瘤研究中的诊断作用，并与计算机断层扫描（CT）和数字减影血管造影（DSA）进行了比较。对21例经放射学证实患有腹主动脉瘤的患者，使用超导1.5T磁体（GE，Signa Advantage）进行磁共振血管造影（MRA）；采用二维时间飞跃法（TOF）结合梯度回波序列（扰相梯度回波序列：翻转角45 - 60度，重复时间/回波时间33/7，层厚2mm，采集次数1次，256×128矩阵，采用下饱和带和血流补偿）。将轴位采集的图像根据最大密度投影（MIP）进行重建，并在z轴上从+90度旋转至 - 90度。所有病例均在轴位上采集了自旋回波（SE）二维T1加权和T2加权序列。12例患者接受了MRI、CT和DSA检查；3例接受了MRI和CT检查；2例接受了MRI和DSA检查；最后4例仅接受了MRI检查。然后对影像学研究进行盲法回顾，并比较不同方法的结果。在所有病例中，MRI在动脉瘤范围和大小、血管受累情况、内脏、髂动脉和股总动脉状态以及最后动脉瘤周围组织情况等方面提供了与CT和DSA相似的信息。作者得出结论，MRI是腹主动脉瘤患者术前检查的一种有用且准确的技术。
