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Abstract #2586

Improved Motion Correction in PROPELLER by Using Grouped Blades as Reference

Zhe Liu1, Zhe Zhang1, Sheng Fang2, Juan Wei3, Chun Yuan1, 4, Hua Guo1

1Center for Biomedical Imaging Research, Department of Biomedical Engineering, School of Medicine, Tsinghua University, Beijing, China; 2Institute of nuclear and new energy technology, Tsinghua University, Beijing, China; 3Philips Research Asia Shanghai, Beijing, China; 4Department of Radiology, University of Washington, Seattle, WA, United States

In PROPELLER, reference data plays a critical role for rigid motion correction. In current practice, there are two methods to generate the reference, single-blade reference method and combined-blade reference method. However, these two methods may fail in certain scenarios. In this study, we propose a new method, groupedCblade reference, for reference generation. Instead of using a single blade or forcing all blades to one direction, our method groups blades with the similar orientations together. Preliminary results show that the new method needs less iteration to converge, and is able to give results with higher quality compared to other methods.