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Accelerated volumetric MRI with a SENSE/GRAPPA combination
Author(s) -
Blaimer Martin,
Breuer Felix A.,
Seiberlich Nicole,
Mueller Matthias F.,
Heidemann Robin M.,
Jellus Vladimir,
Wiggins Graham,
Wald Lawrence L.,
Griswold Mark A.,
Jakob Peter M.
Publication year - 2006
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.20632
Subject(s) - undersampling , computer science , sense (electronics) , sensitivity (control systems) , encoding (memory) , process (computing) , electromagnetic coil , artificial intelligence , algorithm , computer vision , electronic engineering , physics , quantum mechanics , electrical engineering , engineering , operating system
Purpose To combine the specific advantages of the generalized autocalibrating partially parallel acquisitions (GRAPPA) technique and sensitivity encoding (SENSE) with two‐dimensional (2D) undersampling. Materials and Methods By splitting the 2D reconstruction process into multiple one‐dimensional (1D) reconstructions, the normal 1D GRAPPA method can be used for image reconstruction. Due to this data‐handling process, a GRAPPA reconstruction is performed along the phase‐encoding (PE) direction and effectively a SENSE reconstruction is performed along the partition‐encoding (PAE) direction. Results In vivo experiments demonstrate the successful implementation of the SENSE/GRAPPA combination. Experimental results with up to 9.6‐fold acceleration using a prototype 32‐channel receiver head coil array are presented. Conclusion The proposed SENSE/GRAPPA combination for 3D imaging allows the GRAPPA method to be applied in combination with 2D undersampling. Because the SENSE/GRAPPA combination is not based on knowledge of spatial coil sensitivities, it should be the method of choice whenever it is difficult to extract the sensitivity information. J. Magn. Reson. Imaging 2006. © 2006 Wiley‐Liss, Inc.