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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
Non-invasive Fiber Tracking on Diffusion Tensor MRI Using High-Temperature Superconducting Tape RF coil
In-Tsang Lin1, Li-Wei Kuo, Chang-Wei Hsieh
1Interdisciplinary MRI/MRS Lab, Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan.
Summary
High-temperature superconducting coils significantly boost MRI signal-to-noise ratio (SNR) for rat brain studies. This advancement enables faster imaging and improved accuracy in diffusion tensor imaging (DTI) analysis.
Area of Science:
- Medical Imaging
- Materials Science
- Neuroscience
Background:
- High-temperature superconducting (HTS) coils offer enhanced signal-to-noise ratio (SNR) for Magnetic Resonance Imaging (MRI).
- Bismuth strontium calcium copper oxide (Bi-2223) tapes are cost-effective and easier to fabricate for HTS coil construction.
Purpose of the Study:
- To evaluate the performance of HTS Bi-2223 tape coils in enhancing MRI SNR for rat brain studies.
- To assess the impact of HTS coils on diffusion tensor imaging (DTI) acquisition time and fiber tracking accuracy.
Main Methods:
- Fabrication of HTS Bi-2223 tape coils.
- Comparative MRI experiments using HTS coils versus traditional copper coils on rat brains.
- Analysis of SNR, DTI acquisition time, and fiber tracking accuracy.
Main Results:
- HTS coils achieved a 3-4 fold higher SNR compared to copper coils in rat brain MRI.
- DTI acquisition time was reduced by a factor of 9 for equivalent SNR.
- Fiber tracking accuracy using DTI improved by approximately 2.5 times with HTS coils.
Conclusions:
- HTS Bi-2223 coils can significantly improve MRI performance, enabling a 3T system to achieve SNR comparable to a 12T system.
- The technology offers advantages such as reduced T2 shortening effects at high fields.
- Current research applications include brain connectivity and functional MRI (fMRI) studies.
