Title :
Noise Analysis for Multi-slice Radio Frequency Current Density Imaging
Author :
Wang, Dinghui ; DeMonte, Tim P. ; Joy, Michael L. ; Nachman, Adrian I.
Author_Institution :
Dept. of Electr. & Comput. Eng., Toronto Univ., Ont.
fDate :
Aug. 30 2006-Sept. 3 2006
Abstract :
Radio frequency current density imaging (RF-CDI) is an imaging technique that measures current density distribution at the Larmor frequency utilizing magnetic resonance imaging (MRI). The multi-slice RF-CDI sequence has extended the ability of RF-CDI to image multiple slices and thus has enhanced its capacity for biomedical applications. In this paper, the influence of MRI random noise on the sensitivity of multi-slice RF-CDI measurement is studied. The formula of current noise is derived, which is verified by both simulation and phantom experiments. A 3-D finite-difference time-domain (FDTD) model is employed to compute the electromagnetic fields in the simulation
Keywords :
bioelectric phenomena; biomedical MRI; biomedical measurement; computational electromagnetics; current density; current distribution; electromagnetic fields; finite difference time-domain analysis; image sequences; phantoms; random noise; 3-D finite-difference time-domain; FDTD model; Larmor frequency current; MRI random noise analysis; current density distribution measurement; current noise; electromagnetic fields; image sequence; magnetic resonance imaging; multislice radio frequency current density imaging; phantom; Biomedical imaging; Biomedical measurements; Computational modeling; Current density; Finite difference methods; Image analysis; Magnetic noise; Magnetic resonance imaging; Radio frequency; Time domain analysis;
Conference_Titel :
Engineering in Medicine and Biology Society, 2006. EMBS '06. 28th Annual International Conference of the IEEE
Conference_Location :
New York, NY
Print_ISBN :
1-4244-0032-5
Electronic_ISBN :
1557-170X
DOI :
10.1109/IEMBS.2006.259255
