PURPOSE: To develop a magnetic resonance (MR) angiography protocol, with use of breath-hold techniques, for simultaneous aortoiliac inflow assessment and renal artery screening in patients with lower extremity ischemia or aortic aneurysm. MATERIALS AND METHODS: Breath-hold three dimensional gadolinium-enhanced MR angiography was performed in 50 patients (conventional arteriography in 47 was the standard of reference). After multiple strategies were tested in the first 18 patients, a final protocol was formulated and tested in the subsequent 32 patients. RESULTS: The final protocol comprised a single-slab (28 3-mm-thick partitions) coronal acquisition (repetition time, 7 msec; echo time, 2.8 msec; flip angle, 60 degrees) during a single breath hold, enhanced with 30 mL gadoteridol. In the final 32 patients, sensitivity and specificity, respectively, for obstructive lesions were 100% and 100% for the aorta, 100% and 98% for common iliac arteries, 100% and 89% for external iliac arteries, 100% and 89% for main renal arteries, and 100% and 62% for accessory renal arteries. CONCLUSION: This breath-hold protocol improves the accuracy of aortoiliac inflow assessment, but low resolution limits evaluation of small renal arteries.
PURPOSE: To develop a magnetic resonance (MR) angiography protocol, with use of breath-hold techniques, for simultaneous aortoiliac inflow assessment and renal artery screening in patients with lower extremity ischemia or aortic aneurysm. MATERIALS AND METHODS: Breath-hold three dimensional gadolinium-enhanced MR angiography was performed in 50 patients (conventional arteriography in 47 was the standard of reference). After multiple strategies were tested in the first 18 patients, a final protocol was formulated and tested in the subsequent 32 patients. RESULTS: The final protocol comprised a single-slab (28 3-mm-thick partitions) coronal acquisition (repetition time, 7 msec; echo time, 2.8 msec; flip angle, 60 degrees) during a single breath hold, enhanced with 30 mL gadoteridol. In the final 32 patients, sensitivity and specificity, respectively, for obstructive lesions were 100% and 100% for the aorta, 100% and 98% for common iliac arteries, 100% and 89% for external iliac arteries, 100% and 89% for main renal arteries, and 100% and 62% for accessory renal arteries. CONCLUSION: This breath-hold protocol improves the accuracy of aortoiliac inflow assessment, but low resolution limits evaluation of small renal arteries.
Authors: Carina W Yang; James C Carr; Stephen F Futterer; Mark D Morasch; Benson P Yang; Stephanie M Shors; J Paul Finn Journal: AJNR Am J Neuroradiol Date: 2005-09 Impact factor: 3.825
Authors: Annette Hentsch; Manuela A Aschauer; Jörn O Balzer; Joachim Brossmann; Hans P Busch; Kirsten Davis; Philippe Douek; Franz Ebner; Jos M A van Engelshoven; Michaela Gregor; Christian Kersting; Patrick R Knüsel; Edward Leen; Tim Leiner; Christian Loewe; Simon McPherson; Peter Reimer; Fritz K W Schäfer; Matthias Taupitz; Siegfried A Thurnher; Bernd Tombach; Robin Wegener; Dominik Weishaupt; James F M Meaney Journal: Eur Radiol Date: 2003-03-25 Impact factor: 5.315