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Abstract #2136

Accelerated, free-breathing, contrast-enhanced thoracic MR angiography with XD-GRASP reconstruction

Suvai Gunasekaran1, Hassan Haji-Valizadeh2, Bradley Allen1, Ryan Avery1, and Daniel Kim1
1Northwestern University, Chicago, IL, United States, 2Harvard University, Boston, MA, United States

Current methods for contrast-enhanced thoracic MR angiography (CE-MRA) utilize suboptimal imaging practices such as breath holding or long scan time. Here we developed a 9.6-fold accelerated CE-MRA sequence using stack-of-stars k-space sampling and XD-GRASP reconstruction to produce predictable scan time (< 5 min), without significant loss in image quality. Our sequence was significantly faster than the current clinical free-breathing scan, reducing the scan time by 50%. Additionally, our accelerated CE-MRA scan produced comparable image quality that was clinically acceptable.

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