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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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