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Abstract #0868

Two-channel visualization of a passive nitinol guidewire with iron oxide maker created from a single image acquisition

Adrienne E Campbell-Washburn 1 , Burcu Basar 1,2 , Toby Rogers 1 , Merdim Sonmez 1 , Ozgur Kocaturk 1,2 , Robert J Lederman 1 , Michael S Hansen 1 , and Anthony Z Faranesh 1

1 Cardiovascular and Pulmonary Branch, Division of Intramural Research, National Heart Lung and Blood Institute, National Institutes of Health, Bethesda, MD, United States, 2 Institute of Biomedical Engineering, Bogazici University, Istanbul, Turkey

MRI-guided procedures rely on the accurate visualization of devices. Here, a method was developed to isolate distinct signatures of the tip and the shaft of a passive nitinol guidewire with an iron oxide marker. A single spiral image was acquired, and reconstructed three times at three different frequencies (on-resonance and 100Hz off-resonance). The characteristic dark-bright-dark pattern generated from magnitude image subtraction was used to isolate the iron oxide marker and the nitinol guidwire shaft was isolated from complex image subtraction. The tip and shaft are overlaid as two separate color channels on an anatomical image to assist procedural guidance.

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