Simulation of MRI with field nonuniformities

Gholam-Ali Hossein-Zadeh; Hamid Soltanian-Zadeh

doi:10.1117/12.317084

24 July 1998 Simulation of MRI with field nonuniformities

Gholam-Ali Hossein-Zadeh, Hamid Soltanian-Zadeh

Proceedings Volume 3336, Medical Imaging 1998: Physics of Medical Imaging; (1998) https://doi.org/10.1117/12.317084
Event: Medical Imaging '98, 1998, San Diego, CA, United States

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.

Citation Download Citation

Gholam-Ali Hossein-Zadeh and Hamid Soltanian-Zadeh "Simulation of MRI with field nonuniformities", Proc. SPIE 3336, Medical Imaging 1998: Physics of Medical Imaging, (24 July 1998); https://doi.org/10.1117/12.317084

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