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Proceedings Paper

Implementation Of A Magnetic Resonance Imaging Computer Simulator And Preliminary Results
Author(s): Brent K. Stewart
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Paper Abstract

This paper presents a computer simulation applicable to any magnetic resonance imaging method. The simulation solves the phenomenological Bloch equation numerically for time-dependent gradient fields, applying pulse rotation and time-evolution matrix operators in the rotating frame to each element of a digital phantom. Application of these operators yields. the global magnetization, calculated for each sampling time to produce the discrete Free Induction Decay (FID). A collection of these FIDs are then inverse Fast Fourier Transformed into the desired spatial image for display on a video monitor using an image processor. Since the simulation utilizes a general matrix operator approach to pulse app-lication and FID sampling, it may be used to simulate any MR imaging method employing var-ious pulsing sequences, gradient profiles and sampling intervals. This model is used to emulate a 2DFT phase-encoded spin-echo sequence and also very fast MR imaging using small angle excitation. A discussion of the computational problems involved and the simulations efficacy are included.

Paper Details

Date Published: 12 June 1986
PDF: 8 pages
Proc. SPIE 0626, Application of Optical Instrumentation in Medicine XIV and Picture Archiving and Communication Systems, (12 June 1986); doi: 10.1117/12.975394
Show Author Affiliations
Brent K. Stewart, University of California Los Angeles (United States)

Published in SPIE Proceedings Vol. 0626:
Application of Optical Instrumentation in Medicine XIV and Picture Archiving and Communication Systems
Samuel J. Dwyer III; Roger H. Schneider, Editor(s)

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