Apparatus for the formation of images of an examination subject

Details Apparatus for the formation of images of an examination subject Apparatus for the formation of images of an examination subject

1984-05-23

1987-02-17

Kreitman, Stephen A.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

324318, G01R 3320, H03K 353

Patent

active

046442820

ABSTRACT:
Magnetic fields are applied to the examination subject, and the deflection of the atomic nuclei of the examination subject from their state of equilibrium by means of a high frequency magnetic excitation pulse is detected. There is at least one gradient coil for the purpose of generating a linear magnetic field gradient. The gradient coil is connected, in series with an additional inductance, to a current source. Connected in series with the gradient coil is a first switch. Connected in parallel with the series of connection of gradient coil and first switch is a second switch actuatable to open condition approximately simultaneously with the closure of the first switch.

REFERENCES:
patent: 3553592 (1971-01-01), Ahrweiller
patent: 4437053 (1984-03-01), Bax
patent: 4509015 (1985-04-01), Ordidge et al.
patent: 4568880 (1986-02-01), Sugimoto
Bangerter, B., A Simple Pulsed Field Gradient Circuit for High Resolution NMR Spectrometers, J. of Mag. Res., vol. 13, No. 1, Jan. 1974, pp. 87-93.
"Possible & Limitations of NMR Imaging", Loeffler et al., Electromedica 2/82, pp. 38-40.
"Nuclear Magnetic Resonance Tomography (NMR Tomography) & Its Clinical Application Possibilities", Zeitler et al., Electromidica 3/81, pp. 134-143.

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