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Abstract #4440

Real-Time, Free-Breathing Measurement of In-Plane Velocities: A Comparison with ECG-Triggered, Segmented, Breath-Hold Acquisition.

Ning Jin1, Juliana Serafim da Silveira2, Orlando P. Simonetti2, 3

1Siemens Healthcare, Columbus, OH, United States; 2Department of Radiology, Ohio State University, Columbus, OH, United States; 3Department of Internal Medicine, Ohio State University, Columbus, OH, United States

Velocity measurement based on ECG-triggered, segmented phase-contrast imaging (PC-MRI) is a valuable and accurate technique to assess hemodynamics in a variety of clinical applications. However, this method requires reliable cardiac gating, regular cardiac rhythm, and some means to suppress respiratory motion artifacts. Real-time PC-MRI (RT-PCMRI) overcomes these limitations and can measure hemodynamic variations across cardiac cycles. While the accuracy and utility of through-plane RT-PCMRI has been previously demonstrated, in this study we describe a technique for real-time measurement of in-plane velocities and demonstrate the equivalence of real-time in-plane peak velocity measurements with results obtained using conventional, ECG-triggered, segmented k-space PC-MRI.