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Abstract #2871

Pulmonary Perfusion using pseudo-Continuous Arterial Spin Labeling

Joshua S. Greer1,2, Xinzeng Wang2, Ivan Pedrosa2,3, and Ananth J. Madhuranthakam2,3

1Bioengineering, University of Texas at Dallas, Richardson, TX, United States, 2Radiology, UT Southwestern Medical Center, Dallas, TX, United States, 3Advanced Imaging Research Center, UT Southwestern Medical Center, Dallas, TX, United States

Cardiac triggering is regularly used in arterial spin labeled (ASL) pulmonary perfusion imaging to minimize pulsatile flow effects. A cardiac-triggered pseudo-continuous ASL (pCASL) sequence was previously implemented to improve the SNR of lung perfusion, but was found to be sensitive to variations in heart rate due to the prolonged TR, causing the data acquisition to occasionally occur during systole. The purpose of this study was to investigate methods to reduce this cardiac cycle sensitivity in pulmonary perfusion images using pCASL, including cardiac triggering the acquisition and alternative readouts such as a projection acquisition.

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