Medical imaging device using triggered plasma cathode flash X-ra

Details Medical imaging device using triggered plasma cathode flash X-ra Medical imaging device using triggered plasma cathode flash X-ra

1989-06-05

1990-09-18

Church, Craig E.

X-ray or gamma ray systems or devices

Source

Electron tube

378119, H01J 3500

Patent

active

049583654

ABSTRACT:
A medical imaging device employs a plurality of triggered plasma cathode flash X-ray sources, each of which has an axially extending round anode rod, a cathode, and a trigger electrode. The application of a trigger pulse between the electrode and the cathode produces a burst of plasma near the cathode, the plasma containing electrons that are accelerated toward and impact the anode in a region termed the "focal spot" for producing X-rays when a voltage source applies a predetermined voltage between the cathode and anode. According to the invention, a non-conducting surface interconnects the electrode with a cathode or a conductor held at the same potential as the cathode, the application of a trigger pulse to the electrode causing flashover across said surface for producing the burst of plasma.

REFERENCES:
patent: 3093766 (1963-06-01), Cobine
patent: 3366825 (1968-01-01), Lafferty
patent: 3450928 (1969-06-01), Cobine
patent: 3465192 (1969-09-01), Lafferty
patent: 3518433 (1970-06-01), Owen
patent: 3970884 (1976-07-01), Golden
patent: 4129783 (1978-12-01), Houston
patent: 4223225 (1980-09-01), Laffitte et al.
patent: 4289969 (1981-09-01), Cooperstein et al.
"Three Dimensional Imaging of Heart, Lungs, and Circulation", by Ritman et al., Oct. 17, 1980, pp. 273-280.
"Capacitor Discharge Engineering", Frungel, 1976, pp. 241-251.

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