SAR Distributions in Abdomen of a Pregnant Woman during MR Imaging

摘要

MRI (magnetic resonance imaging) is an effective method for diagnosis of diseases. During the imaging, the RF (radio frequency) coil radiates EM (electromagnetic) pulses to the human body and in response receives the NMR (nuclear magnetic resonance) signals emitted from the body. Therefore, it is necessary to estimate the SAR (specific absorption rate) in the human body due to the radiated EM energy from the RF coils. Especially, in this study, SAR distributions in the abdomen of pregnant woman and her fetus are investigated by the FDTD (finite difference time domain) calculations. As a result of the calculations, relatively high SAR values are observed around the skin, muscle, etc of the mother's body. Moreover, the SAR values in the fetus are relatively low compared with above mentioned regions.