A whole-body NMR imaging machine

Hutchinson, J M S, Edelstein, W A and Johnson, Glyn (1980) A whole-body NMR imaging machine. Journal of Physics E: Scientific Instruments, 13 (9). pp. 947-955. ISSN 0022-3735

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Abstract

A nuclear magnetic resonance (NMR) machine capable of producing tomographic sections of the whole human body in vivo has been constructed. This system is based on a four coil, air-core electromagnet producing a field of 0.04 T which corresponds to a proton NMR frequency of 1.7 MHz. The images are produced line by line using a selective excitation technique. Magnetic field gradients up to about 5 mT/m are employed. Electronic subsystems are described here including a radiofrequency (RF) amplitude feedback circuit, an RF power amplifier, a transmit/receive switch, a receiver pre-amplifier and gradient coil drivers. For a single scan through a 103 mm3 sample of human muscle tissue in vivo, the measured proton density uncertainty is 24% and the spin-lattice relaxation time (T1) uncertainty is 74%. Phantom images using CuSO4 solution and in vivo sections through human chest, thighs and head are presented. T1 measurements of human muscle, liver and brain tissue in vivo give results which agree well with T1 values for corresponding rabbit tissues measured in vitro.

Item Type: Article
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
University of East Anglia > Faculty of Medicine and Health Sciences > Research Groups > Clinical Science and Trials
Depositing User: Pure Connector
Date Deposited: 05 Oct 2013 01:54
Last Modified: 06 Sep 2018 14:30
URI: https://ueaeprints.uea.ac.uk/id/eprint/43520
DOI: 10.1088/0022-3735/13/9/013

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