Abstract #2317
Dual echo balanced SSFP for positive contrast of passive nitinol devices in MRI-guided cardiovascular interventions
Adrienne E Campbell-Washburn 1 , Toby Rogers 1 , Hui Xue 1 , Michael S Hansen 1 , Robert J Lederman 1 , and Anthony Z Faranesh 1
1
Division of Intramural Research, National
Heart, Lung and Blood Institute, National Institutes of
Health, Bethesda, Maryland, United States
In order to perform MR-guided cardiovascular
interventions, imaging must be fast, interactive and
provide good visualization of devices. A dual echo bSSFP
sequence is implemented to image commercially available
passive devices. This sequence generates a positive
contrast device image and an anatomical reference image
in a single acquisition (3 frames/second), and reduces
SAR using a variable flip angle scheme. Graphical color
overlay of the device is provided as visual feedback to
operator. In vivo data of a nitinol guidewire in a pig
shows utilization of this technique for improved
visualization of commercially available passive devices
without device modification.
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