JOURNAL ARTICLE
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Table-moving contrast-enhanced magnetic resonance angiography in the evaluation of lower extremity peripheral arterial bypass grafts.

The aim of this study was to investigate the utility of table-moving contrast-enhanced three-dimensional MR angiography in the evaluation of lower extremity peripheral arterial bypass grafts. Twenty-two lower extremity peripheral arterial grafts (13 autologous saphenous vein, 7 polytetrafluoroethylene and 2 Dacron) in 18 patients were evaluated. Preoperative diagnosis were occlusive arterial segments in 14 cases, 4 aneurysms in 2 cases (3 aneurysms in one case) and traumatic femoral artery injury in 2 cases. 1.5T superconductive magnet was used with torso-phase and whole body coil system on MRI examinations. Lower extremity peripheral arterial grafts were evaluated and anastomosis sites were classified into five groups as normal, insignificant stenosis (< 50%), significant stenosis (> 50%), occlusion and ectatic or aneurysmatic appearance. Contrast-enhanced MR angiography imaging of 66 segments of 22 graft patients were of high quality. No difficulties were confronted in the radiological evaluation of peripheral bypass grafts. Graft stenosis as detected in five grafts. Stenotic segments were at the proximal (n = 4) and distal (n = 3) anastomosis sites. Total occlusion was shown in three grafts. Ectasia or aneurysm was seen in only one graft. In lower extremity peripheral bypass graft patients, table-moving contrast enhanced MR angiography can be used in the evaluation and follow-up of the vascular lesions.

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