Title :
Gelled vs non-gelled phantom material for measurement of temperature rise by the MRI RF-magnetic field
Author :
Park, S.M. ; Nyenuis, J.A. ; Lim, E.J. ; Finelli, D. ; Hrdlicka, G. ; Rezai, A.R. ; Rugieri, P. ; Shellock, F.G. ; Stypulkowski, P.H. ; Tkach, J.
Author_Institution :
Electron. Comput. Eng., Purdue Univ., West Lafayette, IN, USA
fDate :
March 30 2003-April 3 2003
Abstract :
In this paper we study the magnetic resonance imaging (MRI), eddy currents are induced in the body of the patient by the RF magnetic field. The precession rate of the proton magnetization determines the frequency, which is 64 MHz for 1.5 T static field. The RF-induced currents in the body are concentrated near medical implants, resulting in a localized additional temperature rise.
Keywords :
biomagnetism; biomedical MRI; biomedical electrodes; eddy currents; patient treatment; phantoms; prosthetics; 1.5 T; 64 MHz; MRI RF-magnetic field; RF-induced currents; eddy currents; gelled phantom material; magnetic resonance imaging; medical implants; nongelled phantom material; patient; proton magnetization; temperature measurement; Biomedical imaging; Eddy currents; Imaging phantoms; Magnetic field measurement; Magnetic materials; Magnetic resonance imaging; Magnetization; Protons; Radio frequency; Temperature measurement;
Conference_Titel :
Magnetics Conference, 2003. INTERMAG 2003. IEEE International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7647-1
DOI :
10.1109/INTMAG.2003.1230558
