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Sensitivity profiles from an array of coils for encoding and reconstruction in parallel (SPACE RIP).
W E Kyriakos1, L P Panych, D F Kacher
1Department of Radiology, Brigham and Women's Hospital, Boston, Massachusetts 02115, USA.
Magnetic Resonance in Medicine
|August 5, 2000
Summary
A novel parallel imaging technique significantly reduces MRI scan times by acquiring and reconstructing data simultaneously. This method enhances temporal resolution, enabling faster imaging for various applications.
Area of Science:
- Magnetic Resonance Imaging (MRI)
- Medical Imaging Technology
- Parallel Imaging
Background:
- MRI scan times are often limited by data acquisition speed.
- Parallel imaging techniques aim to accelerate MRI acquisition.
- Existing methods like SMASH and SENSE have limitations in flexibility and application.
Purpose of the Study:
- To introduce a new parallel imaging technique for faster MRI acquisition.
- To extend the capabilities of existing parallel imaging methods.
- To enable real-time rendering and improved temporal resolution in MRI.
Main Methods:
- Implemented a parallel imaging technique using a receiver coil array.
- Required initial estimation of 2D coil sensitivity profiles.
- Acquired a fraction of k-space lines for parallel reconstruction.
- Extended Simultaneous Acquisition of Spatial Harmonics (SMASH) for arbitrary coil placement and k-space sampling.
Main Results:
- Achieved substantial reductions in MRI scanning and display times.
- Demonstrated simulated results with a 16-fold increase in temporal resolution.
- Showcased experimental results with a 4-fold increase in temporal resolution.
- Enabled imaging of any plane within the volume of interest.
Conclusions:
- The new parallel imaging technique effectively reduces MRI acquisition times.
- The method offers flexibility in coil placement and k-space sampling.
- This approach significantly improves temporal resolution, facilitating real-time MRI applications.