Abstract #4158
Susceptibility-Based Positive-Contrast MRI for Interventional Devices
Ying Dong 1 , Guoxi Xie 2 , and Jim Xiuquan Ji 1
1
Department of Electrical and Computer
Engineering, Texas A&M University, College Station, TX,
United States,
2
Paul
C. Lauterbur Research Center for Biomedical Imaging,
Chinese Academy of Sciences, Shenzhen, Guangdong, China
Interventional devices normally show as dark features
(negative contrast) on MRI. Several methods have been
proposed to generate positive-contrast device images in
interventional MRI. These methods generally rely on the
off-resonance effects due to the devices high
susceptibility, which highlight the surrounding areas
instead of the devices themselves. Recently, we
developed a novel method to generate positive contrast
images of small devices such as brachytherapy seeds by
direct susceptibility mapping. Technical advances of the
method are reported here on imaging of medium/large
devices such as biopsy needles on 3T systems.
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