Title :
Multislice Radio-Frequency Current Density Imaging
Author :
Wang, Dinghui ; DeMonte, Tim P. ; Ma, Weijing ; Joy, Michael L G ; Nachman, Adrian I.
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Toronto, Toronto, ON
fDate :
7/1/2009 12:00:00 AM
Abstract :
Radio-frequency current density imaging (RF-CDI) is an imaging technique that noninvasively measures current density distribution at the Larmor frequency utilizing magnetic resonance imaging (MRI). Previously implemented RF-CDI techniques were only able to image a single slice transverse to the static magnetic field B0 . This paper describes the first realization of a multislice RF-CDI sequence on a 1.5 T clinical imager. Multislice RF current density images have been reconstructed for two phantoms. The influence of MRI random noise on the sensitivity of the multislice RF-CDI measurement has also been studied by theoretical analysis, simulation and phantom experiments.
Keywords :
bioelectric phenomena; biomedical MRI; image reconstruction; image sequences; medical image processing; phantoms; Larmor frequency; RF-CDI sequence; image reconstruction; magnetic resonance imaging; multislice radio-frequency current density imaging; phantom; static magnetic field; Current density; Current measurement; Density measurement; Frequency measurement; Image reconstruction; Imaging phantoms; Magnetic field measurement; Magnetic resonance imaging; Radio frequency; Resonant frequency; Current density imaging (CDI); magnetic resonance imaging (MRI); multislice radio-frequency-current density imaging (RF-CDI); Algorithms; Animals; Computer Simulation; Densitometry; Heart; Image Processing, Computer-Assisted; Magnetic Resonance Imaging; Phantoms, Imaging; Radio Waves; Reproducibility of Results; Sensitivity and Specificity; Swine;
Journal_Title :
Medical Imaging, IEEE Transactions on
DOI :
10.1109/TMI.2008.2012161
