Zampa V, Mascalchi M, Battolla L, Vignali C, Cioni R, Arzilli F, Palla A, Russo R, Falaschi F, Bartolozzi C
Cattedra di Radiologia, Università, Pisa.
Radiol Med. 1994 Oct;88(4):415-9.
To investigate the potentials and limitations of Magnetic Resonance Angiography (MRA) of the renal arteries at mid-field strength, 16 patients with arterial hypertension of suspected renovascular origin were submitted to MRA at 0.5 T with the two-dimensional (2D) phase-contrast technique and to arteriography. MRA yielded diagnostic images in 15 (94%) patients in whom MRA and arteriography identified 38 and 39 renal arteries, respectively. MRA sensitivity and specificity to steno-occlusive alterations of the renal arteries demonstrated by arteriography were 83% and 96%, respectively. These results, although obtained in a small group of patients, indicate that MRA of the renal arteries with a mid-field MR system and the 2D phase-contrast technique can allow the diagnosis of steno-occlusive alterations of the renal arteries. Main MRA limitations were its long acquisition time and some variability in the quality of the MRA images. Nevertheless, the ongoing rapid technical developments in the hardware of MR systems leave room for improving the accuracy of mid-field MRA of the renal arteries and justifies optimism as to its role in the screening of renovascular hypertension.
为研究中场强下肾动脉磁共振血管造影（MRA）的潜力和局限性，对16例疑似肾血管性高血压的动脉高血压患者采用二维（2D）相位对比技术在0.5T场强下进行MRA检查，并进行血管造影。15例（94%）患者的MRA获得了诊断图像，其中MRA和血管造影分别识别出38条和39条肾动脉。MRA对血管造影显示的肾动脉狭窄闭塞性改变的敏感性和特异性分别为83%和96%。这些结果虽然是在一小部分患者中获得的，但表明采用中场磁共振系统和2D相位对比技术进行肾动脉MRA可诊断肾动脉狭窄闭塞性改变。MRA的主要局限性在于采集时间长以及MRA图像质量存在一定变异性。然而，磁共振系统硬件的持续快速技术发展为提高肾动脉中场MRA的准确性留出了空间，并证明对其在肾血管性高血压筛查中的作用持乐观态度是合理的。
