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A parallel imaging approach to wide-field MR microscopy
Mary Preston McDougall1, Steven M Wright
1Department of Biomedical Engineering, Texas A&M University, College Station, Texas, USA. mpmcdougall@tamu.edu
Abstract:
Magnetic resonance microscopy, suggested in the earliest papers on MRI, has always been limited by the low signal-to-noise ratio resulting from the small voxel size. Magnetic resonance microscopy has largely been enabled by the use of microcoils that provide the signal-to-noise ratio improvement required to overcome this limitation. Concomitant with the small coils is a small field-of-view, which limits the use of magnetic resonance microscopy as a histological tool or for imaging large regions in general. This article describes initial results in wide field-of-view magnetic resonance microscopy using a large array of narrow, parallel coils, which provides a signal-to-noise ratio enhancement as well as the ability to use parallel imaging techniques. Comparison images made between a volume coil and the proposed technique demonstrate reductions in imaging time of more than 100 with no loss in signal-to-noise ratio or resolution.
Insights
This study introduces wide field-of-view magnetic resonance microscopy using parallel coils. This technique overcomes limitations of small field-of-view and low signal-to-noise ratio in magnetic resonance microscopy.
Area of Science:
- Biomedical Imaging
- Magnetic Resonance Technology
Background:
- Magnetic resonance microscopy (MRM) is historically limited by low signal-to-noise ratio (SNR) due to small voxel sizes.
- Microcoils improve SNR but restrict the field-of-view, hindering MRM's use in histology and large-region imaging.
Purpose of the Study:
- To develop a wide field-of-view magnetic resonance microscopy technique.
- To overcome the field-of-view limitations of conventional MRM.
Main Methods:
- Utilized a large array of narrow, parallel coils for magnetic resonance microscopy.
- Employed parallel imaging techniques in conjunction with the coil array.
Main Results:
- Achieved significant signal-to-noise ratio enhancement.
- Demonstrated the ability to use parallel imaging techniques.
- Reduced imaging time by over 100-fold compared to volume coils.
- Maintained resolution and signal-to-noise ratio without compromise.
Conclusions:
- The proposed wide field-of-view MRM technique effectively addresses SNR and field-of-view limitations.
- This advancement enables MRM for broader histological and large-region imaging applications.
- The method offers substantial speed improvements without sacrificing image quality.
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