Mechanically Adjustable 4-Channel RF Transceiver Coil Array for Rat Brain Imaging in a Whole-Body 7 T MR Scanner
Abstract
:1. Introduction
2. Materials and Methods
2.1. Electromagnetic Simulation
2.2. Mechanically Adjustable Housing and RF Coil Design
2.3. Bench Tests
2.4. MR Experiments
3. Results
3.1. EM Simulations
3.2. Bench Measurements
3.3. MR Measurements
4. Discussion
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Small Phantom | Large Phantom | |||||
---|---|---|---|---|---|---|
2 | 3 | 4 | 2 | 3 | 4 | |
Elements | Elements | |||||
Power efficiency [μT/√W] | 10.1 | 9.1 | 10.2 | 5.8 | 6.1 | 6.7 |
SAR efficiency [μT/√(W/kg)] | 0.9 | 1.1 | 1.3 | 0.6 | 0.9 | 1.0 |
Simulated S-Parameters [dB] | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Adult Rat | Infant Rat | |||||||||
Configuration 1 non-adjustable housing | ch | 1 | 2 | 3 | 4 | ch | 1 | 2 | 3 | 4 |
1 | −10.5 | 1 | −5.3 | |||||||
2 | −20.4 | −4.7 | 2 | −10.0 | −3.6 | |||||
3 | −26.0 | −14.4 | −11.8 | 3 | −33.8 | −36.0 | −11.7 | |||
4 | −26.2 | −14.6 | −11.9 | −11.9 | 4 | −33.6 | −35.8 | −12.5 | −11.9 | |
Configuration 2 adjustable housing | ch | 1 | 2 | 3 | 4 | ch | 1 | 2 | 3 | 4 |
1 | −11.4 | 1 | −10.8 | |||||||
2 | −19.4 | −10.5 | 2 | −16.6 | −7.5 | |||||
3 | −25.7 | −14.4 | −11.9 | 3 | −30.2 | −19.4 | −11.8 | |||
4 | −25.7 | −14.8 | −19.7 | −11.9 | 4 | −30.5 | −19.5 | −12.0 | −11.8 |
Measured S-Parameters [dB] | ||||
---|---|---|---|---|
ch | 1 | 2 | 3 | 4 |
1 | −23.0 | |||
2 | −18.5 | −26.3 | ||
3 | −14.7 | −12.6 | −20.2 | |
4 | −15.8 | −10.1 | −14.7 | −27.3 |
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Roat, S.; Nohava, L.; Laistler, E. Mechanically Adjustable 4-Channel RF Transceiver Coil Array for Rat Brain Imaging in a Whole-Body 7 T MR Scanner. Sensors 2024, 24, 5377. https://doi.org/10.3390/s24165377
Roat S, Nohava L, Laistler E. Mechanically Adjustable 4-Channel RF Transceiver Coil Array for Rat Brain Imaging in a Whole-Body 7 T MR Scanner. Sensors. 2024; 24(16):5377. https://doi.org/10.3390/s24165377
Chicago/Turabian StyleRoat, Sigrun, Lena Nohava, and Elmar Laistler. 2024. "Mechanically Adjustable 4-Channel RF Transceiver Coil Array for Rat Brain Imaging in a Whole-Body 7 T MR Scanner" Sensors 24, no. 16: 5377. https://doi.org/10.3390/s24165377