PURPOSE: To assess the feasibility of magnetic resonance (MR) imaging-guide
d stent placement in iliac arterial stenoses.
MATERIALS AND METHODS: Thirteen patients with 14 iliac arterial stenoses we
re examined prospectively. Angioplasty was performed through a femoral shea
th by using a conventional 1.5-T MR imaging system. Stents and catheters we
re visualized on the basis of their artifacts. Nitinol stents were placed w
ith gradient-echo MR imaging guidance. Angioplasty balloons were inflated w
ith gadolinium-based contrast material. Results were evaluated clinically a
nd with both digital subtraction angiography (DSA) and contrast material-en
hanced MR angiography.
RESULTS: Ten of 13 patients were treated with technical success by using MR
imaging-guided intervention alone. Three patients were treated with additi
onal fluoroscopic guidance, because complications tie, panic attack, subint
imal recanalization, and stent misplacement) occurred with MR guidance. The
quality of the postinterventional contrast-enhanced MR angiograms of three
of 12 lesions with stents was limited owing to stent-induced signal loss o
f the lumen. The mean stenosis degree after stent placement was significant
ly higher at contrast-enhanced MR angiography than at DSA (24.6% vs 6.2%).
The mean MR imaging-guided procedure time was 74 minutes.
CONCLUSION: MR imaging-guided stent placement in iliac arteries is feasible
in select patients. The presented technique has limitations-that is, long
procedure times, lack of real-time monitoring, and stent artifacts-that nec
essitate further modifications before it can be recommended for clinical us