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British Journal of Radiology (2006) 79, 298-302
© 2006 British Institute of Radiology
doi: 10.1259/bjr/19491401
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Full Paper

Intra-arterial MR angiography in the iliac system: initial clinical experience with 25 patients

C Paetzel, MD, N Zorger, MD, O W Hamer, MD, J Seitz, MD, T Schleicher, MD, S Feuerbach, MD, W R Nitz, PhD, M Lenhart, MD and T Herold, MD

Department of Diagnostic Radiology, University of Regensburg, Hospital, 93042 Regensburg, Germany

The aim of this study was to evaluate intra-arterial magnetic resonance angiography (MRA) of the iliac arteries. Therefore, 25 consecutive patients (17 male, 8 female) suffering from symptomatic occlusive disease of the lower limbs were investigated prospectively. Catheter angiography was performed before MRA and served as the standard of reference. Contrast-enhanced intra-arterial MRA was performed using a 1.5 Tesla MRI system. Contrast agent (gadodiamide) was injected by a conventional pigtail-shaped angiography catheter placed in the abdominal aorta. Vascular lesions were assessed by four investigators. The degree of stenosis was compared with the findings of conventional catheter angiography. Additionally, the diagnostic quality of the MR angiograms was assessed by the investigators using a semi quantitative five-point scale. All lesions shown by catheter angiography were detected and correctly localized by intra-arterial MRA. MR angiograms exhibit a specificity of 95% and a sensitivity of 96% for stenoses of 50% or more. The diagnostic quality of the images was judged from good to excellent, on average. Intra-arterial MRA exhibits a specificity and sensitivity comparable with intravenous angiography. The image quality appears to be adequate for supporting MR-guided vascular intervention.




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F J DE ALBUQUERQUE, A C COUTINHO, E C CASTRO NETTO, R C DOMINGUES, and E L GASPARETTO
Infra-renal abdominal aorta agenesis: a case report with emphasis on MR angiography findings
Br. J. Radiol., July 1, 2008; 81(967): e179 - e183.
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