NDLI: An introduction to NMR imaging: From the Bloch equation to the imaging equation

Content Provider	IEEE Xplore Digital Library
Author	Hinshaw, W.S. Lent, A.H.
Copyright Year	1963
Abstract	The emerging technology of NMR imaging is introduced here as a problem in system identification. We show how selected families of signals may be input into the system ("system," in this case, is almost synonymous with "patient") in order that the system's responses to these inputs may be directly interpreted in terms of the system parameters. Once identified, a raster display of the system parameters provides an internal image of the patient. Inputs to the system age four-component functions of time. One component describes the strength of an RF signal, and the other three components govern the strength of three spatially varying, independently controlled magnetic fields (the gradient fields) in which the patient is immersed. In response to these inputs some of the protons in the patient, acting in concordance with the Bloch equation, give rise to local fluctuations in the magnetization which are detected with a tuned antenna and a sensitive receiver. The relationship between this output signal and the system parameters is summarized in the imaging equation.
Sponsorship	IEEE Publication
Starting Page	338
Ending Page	350
Page Count	13
File Size	3990046
File Format	PDF
ISSN	00189219
Volume Number	71
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1983-03-01
Publisher Place	U.S.A.
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Equations Magnetic resonance imaging System identification Radiofrequency identification Displays Magnetic fields Protons Fluctuations Magnetization Receiving antennas
Content Type	Text
Resource Type	Article
Subject	Computer Science Electrical and Electronic Engineering

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