X-ray or gamma ray systems or devices – Electronic circuit – With display or signaling
Patent
1996-03-06
1998-03-03
Porta, David P.
X-ray or gamma ray systems or devices
Electronic circuit
With display or signaling
378 982, H04N 100
Patent
active
057244022
ABSTRACT:
An X-ray system includes an X-ray source transmitting x-radiation through an radio-opaque mask and the position of a human subject to an X-ray receptor such as a fluorescent screen which responds to the X-radiation to produce a light image at the second side of the receptor. Effective at the second side of the receptor are a plurality of optical reflecting or refracting components in a two-dimensional pixel array which direct light from the image to the input lens of a video camera tube. That is, the optical components are spaced center-to-center proportionally to the size and spacing of the picture elements in a video signal generated by the camera tube. Because the light image is directed by the optical components selectively toward the input to the camera tube a substantially higher light energy is received by the camera tube than if the light from the receptor is radiated isotropically, such that the exposure of the subject is reduced and the signal-to-noise ration is increased, and the information content of the video signal is substantially improved.
REFERENCES:
patent: 3038959 (1962-06-01), Beurle
patent: 4593400 (1986-06-01), Mouyen
patent: 5008547 (1991-04-01), Molteni et al.
patent: 5023896 (1991-06-01), Yokouchi et al.
patent: 5404387 (1995-04-01), Hammond et al.
patent: 5412705 (1995-05-01), Snoeren et al.
Grover James H.
Porta David P.
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