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Abstract #3770

Respiratory Rate Regulation for Optimal Time-SLIP Imaging of Renal Arteries

Francis Jouniaux1, Isabelle Parienty1, Faiza Admiraal-Behloul2

1Centre d'Imagerie du Bois de Verrire, Antony, France; 2MRI, Toshiba Medical Systems Europe, Zoetermeer, Netherlands

Respiratory gated non contrast enhanced MR angiography using Time-Spatial inversion labeling pulse (Time-SLIP) is a well established technique at our institution for the exploration of renal arteries. Since 2007, we scanned more than 450 patients with age ranging for 18 to 92 year old. Patients with fast and/or irregular respiration rates (RR) can be very challenging to image. Most of the difficult patients are old (80+), or have a cardiac disease and/or a respiratory disease. A breath hold of more than 16s is intolerable for most of these patients. We describe how regulating the respiratory rate can significantly improve the image quality and the success rate of Time-SLIP.