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Abstract #0741

Operator Controlled Illumination of Active Catheter Tips using a Variable Attenuator

Ali Caglar Özen1, Thomas Lottner1, Simon Reiss1, Axel Krafft1, Timo Heidt2, Constantin von zur Muhlen2, and Michael Bock1

1Deptartment of Radiology, Medical Physics, Medical Center – University of Freiburg, Freiburg, Germany, 2Department of Cardiology and Angiology, University Heart Center, Freiburg, Germany

Accurate visualization of catheter tip is important in MR-guided interventional procedures, in particular in the coronary arteries where the tip orientation is essential to introduce the catheter into the target vessel. Active catheters generally provide a positive MR signal around the tracking coil at the tip. In this study, an operator-controlled variable attenuator is attached to an active catheter to enable rapid manual adjustment of the tip signal by the operator. The system was tested in an animal experiment at 3 T, and the active catheter was successfully introduced into the left coronary artery multiple times.

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