Abstract #5556

Quantitative Image Analysis of Real-Time Golden Angle Radial iSSFP for Interventional MRI

Samantha Mikaiel^1,2, Thomas Martin^1,2, Kyunghyun Sung^1,2,3, and Holden H Wu^1,2,3

¹Radiological Sciences, University of California Los Angeles, Los Angeles, CA, United States, ²Biomedical Physics, University of California Los Angeles, Los Angeles, CA, United States, ³Bioengineering, University of California Los Angeles, Los Angeles, CA, United States

Real-time visualization is crucial to the success of MRI-guided minimally invasive cancer interventions. We have developed golden-angle (GA) ordered radial integrated-SSFP (iSSFP), which can suppress banding artifacts associated with bSSFP while maintaining similar T₂/T₁ contrast. In this work, we further analyze the tissue contrast as well as passive visualization of interventional needles using GA radial iSSFP. In volunteer scans, we verify that GA radial iSSFP achieves T₂/T₁ tissue contrast similar to bSSFP while suppressing banding artifacts. With phantom scans we show that iSSFP reduced the size of the needle-induced signal void, versus that seen on bSSFP. These advantages of GA Radial iSSFP show its potential for improving real-time MRI-guided interventions.

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