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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