Laissy J P, Limot O, Henry-Feugeas M C, Karrillon G, Hackworth C A, Julliard J M, Aumont M C, Schouman-Claeys E
Department of Radiology, Hôpital Bichat 46, Paris, France.
Radiology. 1995 Nov;197(2):455-9. doi: 10.1148/radiology.197.2.7480693.
To assess the efficacy of magnetic resonance (MR) angiography of iliac arteries before and immediately after percutaneous transluminal angioplasty (PTA).
In 14 patients with 22 diseased iliac artery segments (external or common), axial two-dimensional time-of-flight MR angiography was performed. Images were reconstructed with a maximum-intensity-projection (MIP) algorithm. MR angiography was performed 1-4 days after diagnostic digital angiography and 6-24 hours after PTA. Findings obtained before and immediately after PTA were compared for number and location of significant (ie, > 50%) stenoses, length and diameter of balloon to be employed, and diameter of the stenotic artery after PTA. Linear regression analysis was performed.
Sensitivity and specificity of MR angiography for determination of significant stenoses were 95% and 97%, respectively. Before PTA, balloon dimensions depicted on MR angiograms and digital angiograms were well correlated (r = .76, P < .05). After PTA, MR angiograms and digital angiograms provided similar findings in all but one case.
MR angiography helped determine if PTA is indicated and depicted iliac artery patency after PTA.
评估经皮腔内血管成形术（PTA）前后髂动脉磁共振（MR）血管造影的疗效。
对14例患者的22段病变髂动脉（外动脉或总动脉）进行轴向二维时间飞跃MR血管造影。图像采用最大强度投影（MIP）算法重建。MR血管造影在诊断性数字血管造影后1 - 4天以及PTA后6 - 24小时进行。比较PTA前后获得的结果，包括显著（即> 50%）狭窄的数量和位置、所用球囊的长度和直径以及PTA后狭窄动脉的直径。进行线性回归分析。
MR血管造影测定显著狭窄的敏感性和特异性分别为95%和97%。PTA前，MR血管造影和数字血管造影显示的球囊尺寸相关性良好（r = 0.76，P < 0.05）。PTA后，除1例病例外，MR血管造影和数字血管造影的结果相似。
MR血管造影有助于确定是否需要进行PTA，并显示PTA后髂动脉的通畅情况。
