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Accelerated volumetric MRI with a SENSE/GRAPPA combination.
Martin Blaimer1, Felix A Breuer, Nicole Seiberlich
1Department of Experimental Physics 5, University of Würzburg, Würzburg, Germany. martin.blaimer@case.edu
Journal of Magnetic Resonance Imaging : JMRI
|June 21, 2006
Summary
This study introduces a novel SENSE/GRAPPA combination for faster 3D MRI. This technique merges GRAPPA and SENSE for enhanced undersampling, improving imaging speed and efficiency.
Area of Science:
- Magnetic Resonance Imaging
- Image Reconstruction Techniques
Background:
- Generalized Autocalibrating Partially Parallel Acquisitions (GRAPPA) and Sensitivity Encoding (SENSE) are advanced MRI techniques.
- Combining GRAPPA and SENSE offers potential for improved imaging speed and quality.
Purpose of the Study:
- To integrate the benefits of GRAPPA and SENSE for 2D undersampling in 3D MRI.
- To develop a novel reconstruction method for accelerated MRI acquisition.
Main Methods:
- The 2D reconstruction process was divided into multiple 1D reconstructions.
- 1D GRAPPA was applied along the phase-encoding (PE) direction.
- SENSE reconstruction was effectively performed along the partition-encoding (PAE) direction.
Main Results:
- Successful implementation of the SENSE/GRAPPA combination was demonstrated through in vivo experiments.
- Achieved up to 9.6-fold acceleration using a prototype 32-channel head coil array.
Conclusions:
- The SENSE/GRAPPA combination enables GRAPPA application with 2D undersampling in 3D imaging.
- This method is advantageous when spatial coil sensitivity information is difficult to obtain.
- Offers a robust solution for accelerated MRI without relying on coil sensitivity maps.