Numerical simulation of SAR and B/sub 1/-field inhomogeneity of shielded RF coils loaded with the human head
IEEE Transactions on Biomedical Engineering1998Vol. 45(5), pp. 650–659
Citations Over TimeTop 10% of 1998 papers
Abstract
The finite-difference time-domain (FDTD) method is combined with the method of moments (MoM) to compute the electromagnetic fields of shielded radio-frequency (RF) coils loaded with an anatomically accurate model of a human head for high-frequency magnetic resonance imaging (MRI) applications. The combined method can predict both the specific energy absorption rate (SAR) and the magnetic field (known as the B1 field) excited by any RF coils. Results for SAR and B1 field distribution, excited by shielded and end-capped birdcage coils, are calculated at 64, 128, 171, and 256 MHz. The results show that the value of SAR increases when the frequency of the B1 field increases and the B1 field exhibits a strong inhomogeneity at high frequencies.
Related Papers
- → Analysis of shielded tents and other electrically thin shielded rooms(1999)3 cited
- → An efficient modeling method for analysis of shielding rooms(2006)
- → Three dimensional FEM calculations on shielding of power frequency magnetic fields from a substation(2002)
- Magnetic Field Shielding Analysis of Shielded Cell with 3D Finite Element Method(2006)
- → Uncertainties and Limitations of Shielding Measurement with Two Antenna Method(2022)