X-ray image intensifier with high x-ray conversion efficiency an

Details X-ray image intensifier with high x-ray conversion efficiency an X-ray image intensifier with high x-ray conversion efficiency an

1994-10-14

1997-04-22

Le, Que T.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

313526, H01J 4014

Patent

active

056231415

ABSTRACT:
A new type x-ray image intensifier has a specially developed x-ray sensit photocathode which has a low/high density alkali halogenide structure and therefore has high conversion efficiency of converting x-ray directly into photoelectrons or a field-assisted x-ray photocathode which has an extracting field and therefore is able to provide a high conversion efficiency of x-ray to photoelectron and high spatial resolution, even high time resolution. The new type x-ray image intensifier consists of the x-ray photocathode, a MCP and a phosphor screen, forming a proximity focus type photoelectric imaging device.
A new portable x-ray diagnosis unit has the new type x-ray image intensifier and a new type compact x-ray source that has a very small volume, 30-90 kv acceleration voltage and a cone protective cover at the outlet of x-ray.

REFERENCES:
patent: 4142101 (1979-02-01), Yin
patent: 5225670 (1993-07-01), She et al.
patent: 5250795 (1993-10-01), Koishi et al.
patent: 5285061 (1994-02-01), She et al.

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