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RLS-grappa: Reconstructing parallel MRI data with adaptive filters

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4 Author(s)
W. Scott Hoge ; Dept. of Radiology, Brigham and Women¿s Hospital, 75 Francis St., Boston, MA, U.S.A. ; Fernando Gallego ; Zhikui Xiao ; Dana H. Brooks

GRAPPA is one of the predominant methods used to reconstruct accelerated parallel MRI data. In has been shown previously that spatially varying the GRAPPA reconstruction coefficients can be advantageous. A significant problem with these approaches, however, is an increase in computation time due to an increase in the number of linear system solves needed. Here, we leverage the fact that these systems vary slowly over the coordinate space and employ recursive adaptive filters in place of explicit system solves. This approach produces high quality spatially variant GRAPPA reconstructions with a computation time comparable to standard GRAPPA.

Published in:

2008 5th IEEE International Symposium on Biomedical Imaging: From Nano to Macro

Date of Conference:

14-17 May 2008