Electronic Posters: Cardiovascular

Thursday 13:30-15:30 Computer 41

13:30 3769. Time-SLIP Versus DSA in Patients with Renal Artery Stenosis

Isabelle Parienty¹, Faiza Admiraal-Behloul², Francis Jouniaux¹, Michel Piotin³, Guy Rostoker<sup>3

1</sup>Centre d'Imagerie du Bois de Verrière, Antony, France; ²MRI, Toshiba Medical Systems Europe, Zoetermeer, Netherlands; ³Nephrology, Centre Hospitalier Claude Galien, Paris, France

The purpose of this study was to compare the findings in non-contrast enhanced MRA using the Time Spatial Labeling Inversion Pulse (Time-SLIP) technique to those of Digital Subtraction Angiography (DSA) in patients with significant renal artery stenosis (>60%, or >50% with post stenotic dilation).

14:00 3770. Respiratory Rate Regulation for Optimal Time-SLIP Imaging of Renal Arteries

Francis Jouniaux¹, Isabelle Parienty¹, Faiza Admiraal-Behloul<sup>2

1</sup>Centre d'Imagerie du Bois de Verrière, 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.

14:30 3771. Assessment of Non-Contrast Angiography in Diabetic Patients

Erin Jane Kelly¹, JoEllyn L. L. Stolinski², James Jelinek<sup>2

1</sup>Magnetic Resonance, Toshiba America Medical Systems, Tustin, CA, United States; ²Radiology, Washington Hospital Center, Washington, D.C., United States

Diabetes is highly associated with renal failure and peripheral artery disease. In light of the association between MRI contrast media and the onset of NSF/NSD, it is increasingly important to replace CE-MRA with non-contrast angiographic imaging techniques, such as Fresh Blood Imaging and Time-SLIP. In this study, diabetic patients referred for and MRA were imaged with FBI and Time-SLIP for peripheral run-offs and renal angiography. Image Quality and Diagnostic Confidence scores indicate that FBI and Time-SLIP are both safe and effective alternatives to CE-MRA in this patient group.

15:00 3772. An MRI Examination for Evaluation of Aortic Dissection Using a Blood Pool Agent

Rachel Clough¹, Tarique Hussain¹, Sergio Uribe¹, Peter Taylor², Reza Razavi¹, Tobias Schaeffter¹, Matthew Waltham<sup>2

1</sup>Division of Imaging Sciences, King's College London, London, United Kingdom; ²Guy’s and St Thomas’ NHS Foundation Trust, St Thomas' Hospital, London, United Kingdom

An MRI examination for evaluation of aortic dissection using a blood-pool agent is presented. The aims of this study were to investigate the use of direct thrombus MRI and quantitative flow analysis for the determination of false lumen thrombus volumes in patients with Type B aortic dissection. It is shown that blood-pool imaging together with direct thrombus MRI allows assessment of aortic anatomy and more accurate quantification of false lumen thrombosis compared with CT. Current clinical trials using false lumen thrombosis as a primary endpoint should consider multi-parametric MRI as the preferred diagnostic tool.