Radiant energy – Fluent material containment – support or transfer means – With irradiating source or radiating fluent material
Patent
1978-09-01
1980-10-14
Smith, Alfred E.
Radiant energy
Fluent material containment, support or transfer means
With irradiating source or radiating fluent material
250213VT, G03B 4116, A61B 614, H01J 3150
Patent
active
042283566
ABSTRACT:
Panoramic dental X-ray machine includes a tubehead-camera assembly which employs, in its simplest embodiment, three vertically stacked image intensifiers, the totality of their radiation input faces being substantially similar in shape and dimensions to a slot in a front panel of the camera assembly, the input faces being secured against the slot and aligned therewith such that radiations passing therethrough must then pass through the image intensifiers. Means for selectively controllably varying the potential across each of the individual image intensifiers varies the electron gain of that image intensifier to thus provide optimal contrast between multi-density structures of the dental arch and surrounding areas on a full size radiograph.
REFERENCES:
patent: 2798958 (1957-07-01), Hudson et al.
patent: 3666957 (1972-05-01), Wyess
patent: 3681606 (1972-08-01), Tinney
Yin et al., "The Lixiscope: A Pocket-Size X-Ray Imaging System", NASA Technical Memorandum 78064, Jan. 1978.
Owen, L. D., "The Channeltron Electron Multiplier Array and Its Application to Low-Level Detection Devices", IPC Science and Technology Press Ltd., Sep. 1972, as reprinted by Galileo Electro-Optics Corp., Galileo Park, Sturbridge, Mass.
Grigsby T. N.
Pennwalt Corporation
Smith Alfred E.
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