| Autor: |
Christopher M. Collins, Colin A. Roopnariane, Sukhoon Oh, Mohammad-Reza Tofighi |
| Rok vydání: |
2010 |
| Předmět: |
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| Zdroj: |
2010 IEEE Radio and Wireless Symposium (RWS). |
| DOI: |
10.1109/rws.2010.5434270 |
| Popis: |
We describe an MRI-based method for mapping temperature and specific absorption rate (SAR) using a solenoid coil and a birdcage coil for heating and imaging of a weakly conductive dielectric sample, respectively. The accuracy and the quality of SAR/temperature mapping are enhanced by separating the heating and imaging RF coils. 50 W of RF power is applied to the solenoid coil to heat the conductive agar-gel phantom for 120 sec. Maps of temperature increase were acquired with an MRI-based method. The MR-based measurements were in good agreement with fiber optic measurements. Finally, the dual-coil heating system was simulated using the finite difference time domain (FDTD) method. The distribution of numerically-calculated and experimentally-acquired SAR were also in good agreement. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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