Whole Body and Local SAR in Anatomical Phantoms Exposed to RF Fields from Birdcage Coils

A numerical study of the induced fields and specific absorption rate (SAR) in anatomical phantoms exposed to the radiofrequency (RF) fields of magnetic resonance (MR) scanners was conducted using the finite difference time domain (FDTD) method at 64MHz and 128MHz. Three phantoms including two adults and one child were used. The study revealed inconsistencies between the MRI safety standards and current scanning practices. Furthermore, the results indicate that established guidelines for demonstrating MRI safety of implants are insufficient.