Numerical evaluation of heating of the human head due to magnetic resonance imaging.
In this paper, we present a numerical model for evaluating tissue heating during magnetic resonance imaging (MRI). Our method, which included a detailed anatomical model of a human head, calculated both the electromagnetic power deposition and the associated temperature elevations during an MRI head examination. Numerical studies were conducted using a realistic birdcage coil excited at frequencies ranging from 63 to 500 MHz. The model was validated both experimentally and analytically. The experimental validation was performed at the MR test facility located at the Food and Drug Administration's Center for Devices and Radiological Health.
Department of Biomedical Engineering, Catholic University of America, Washington, DC 20064, USA. nguyenu@cua.edu
Uyen D
UD
Nguyen
J Steven
JS
Brown
Isaac A
IA
Chang
Joseph
J
Krycia
Mark S
MS
Mirotznik
D001822:Body Burden; D001831:Body Temperature / Q000502:physiology* / Q000528:radiation effects*; D003198:Computer Simulation; D004574:Electromagnetic Fields; D006257:Head / Q000502:physiology* / Q000528:radiation effects*; D006358:Hot Temperature; D006801:Humans; D018499:Linear Energy Transfer / Q000502:physiology / Q000528:radiation effects; D008279:Magnetic Resonance Imaging; D008954:Models, Biological; D009716:Numerical Analysis, Computer-Assisted; D019047:Phantoms, Imaging; D011874:Radiometry / Q000379:methods; D012062:Relative Biological Effectiveness; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013817:Thermography / Q000379:methods