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Proceedings Paper

Simulation of MRI with field nonuniformities
Author(s): Gholam-Ali Hossein-Zadeh; Hamid Soltanian-Zadeh
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Paper Abstract

This paper presents a simulation methodology which includes all steps of Magnetic Resonance Imaging (MRI), from precession of magnetic moments to reconstruction of the image. For modeling the operation of RF pulses, well known solutions to the Bloch equations are used. To simulate the effects of arbitrary shape RF pulses, a new physical based method is presented. Intravoxel spin dephasing is simulated and partial volume averaging and noise are included in the simulation procedure. To test and validate the algorithm, MR images of a Quality Control (QC) phantom and a human brain are simulated by the proposed approach. The resulting images are compared to the corresponding actual MR images. Impulse response of a spin echo sequence for different conditions such as different locations for the impulse, different amounts of static magnetic field nonuniformity, and different number of spins in the voxel are generated by the simulation algorithm.

Paper Details

Date Published: 24 July 1998
PDF: 12 pages
Proc. SPIE 3336, Medical Imaging 1998: Physics of Medical Imaging, (24 July 1998); doi: 10.1117/12.317084
Show Author Affiliations
Gholam-Ali Hossein-Zadeh, Univ. of Tehran (Iran)
Hamid Soltanian-Zadeh, Univ. of Tehran and Henry Ford Hospital (United States)

Published in SPIE Proceedings Vol. 3336:
Medical Imaging 1998: Physics of Medical Imaging
James T. Dobbins III; John M. Boone, Editor(s)

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