Abstract #4157
Reducing Needle Induced Image Artifacts in Interventional MRI while Maintaining Soft Tissue Contrast
Thomas Boyd Martin 1,2 , Holden Wu 1 , Danny JJ. Wang 3 , and Kyung Sung 2
1
Biomedical Physics Interdepartmental
Program, University of California Los Angeles, Los
Angeles, California, United States,
2
Radiological
Sciences, University of California Los Angeles, Los
Angeles, California, United States,
3
Neurology,
University of California Los Angeles, Los Angeles,
California, United States
MRI has great potential to provide an improved ability
1) to track the needle position, 2) to distinguish
diseased from healthy tissue and 3) to monitor treatment
effect for image guidance procedures. Balanced-SSFP
(bSSFP) offers good T2/T1 tissue contrast and is a fast
imaging technique that minimizes patient motion, but
severe needle induced banding artifacts are present.
Gradient Spoiled (GRE) and RF-Spoiled Gradient-Echo
(SPGR) sequences decrease needle-induced artifacts, but
result in lower soft tissue contrast. This study
demonstrates a special case of a GRE sequence,
integrated-SSFP (iSSFP), that reduces needle induced
banding artifacts from bSSFP, while maintaining similar
T2/T1 contrast.
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