A Study of Parallel MRI Reconstruction Approaches for Sub-Sampled Partial-Fourier Acquisitions

Carlos Zacarias-Almarcha, Dana H. Brooks, W. S. Hoge
Proceeding of 40th Asilomar Conference on Signal, Systems, and Computers
Pages 1880-1884
Oct 29 - Nov 1, 2006

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Abstract

We compare here two approaches to reconstruct subsampled partial Fourier MRI data acquired with multiple receiver coils. The first approach combines homodyne detection with SENSE-like reconstructions. The second approach employs separate regularization of the real and imaginary components (two-parameters) of the parallel MRI linear system to constrain the magnitude of phase variation in the reconstructed image. We show that both methods robustly reconstruct images from several sampling patterns. The dominant difference is the number of symmetric lines of k-space needed to provide high quality reconstructions. The two parameter approach can reconstruct good images using only two symmetric lines, whereas the homodyne approach requires significantly more. We present a method for automatic selection of the two parameters, and results from both high resolution and low contrast phantom data.

Reference

Zacarias-Almarcha C, Brooks DH, Hoge WS. A study of parallel MRI reconstruction approaches for sub-sampled partial-fourier acquisitions. In Proceeding of 40th Asilomar Conference on Signal, Systems, and Computers. Pacific Grove, CA, USA, 2006;1880-1884.

Bibtex entry

@inProceedings{almarcha:Asilomar2006,
  title          = {A Study of Parallel {MRI} Reconstruction Approaches for    
                   Sub-Sampled Partial-Fourier Acquisitions},                  
  author         = {Zacarias-Almarcha, Carlos and Brooks, Dana H. and Hoge, W. 
                   Scott},                                                     
  year           = 2006,                                                       
  booktitle      = {Proceeding of 40th Asilomar Conference on Signal, Systems, 
                   and Computers},                                             
  address        = {Pacific Grove, CA, USA},                                   
  pages          = {1880-1884},                                                
  month          = {Oct 29 - Nov 1}
}

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© Copyright 2006 IEEE. Published in the Proceedings of the 40th Asilomar Conference on Signals, Systems, and Computers (Pacific Grove, CA, USA). Oct 29 - Nov 1, 2006.

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