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Fluoroscopic Contrast-Enhanced MR Angiography with a Magnetization-Prepared Steady-State Free Precession Technique in Peripheral Arterial Occlusive Disease

¹ Department of Radiology, University Hospital of Basel, Petersgraben 4, 4031 Basel, Switzerland.
² Department of Angiology, University Hospital of Basel, 4031 Basel, Switzerland.
³ Medical Physics, Department of Radiology, University Hospital of Basel, 4031 Basel, Switzerland.

OBJECTIVE. The objective of our study was to evaluate the feasibility of intraarterial (IA) near-real-time contrast-enhanced MR angiography (CE-MRA) with a frame rate of 1.3 frames per second in seven patients with lower extremity peripheral arterial occlusive disease (PAOD). For optimized background suppression, a modified 2D steady-state free precession (SSFP) technique with magnetization preparation and mask subtraction was developed. The femoropopliteal and infrapopliteal arteries were covered in two separate steps. Acceptable contrast-to-noise ratios were obtained, and road maps were reconstructed from the same data set.

CONCLUSION. Mastering IA near-real-time CE-MRA, including road map reconstruction, with an SSFP technique in the lower extremity of patients with PAOD is an important building block toward successfully performing endovascular catheter MR-guided interventions.

Keywords: angiography • extremities • fluoroscopy • MR angiography • MRI • MR technique • peripheral vascular disease

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