X-ray or gamma ray systems or devices – Beam control – Antiscatter grid
Patent
1987-09-16
1988-10-25
Fields, Carolyn E.
X-ray or gamma ray systems or devices
Beam control
Antiscatter grid
378153, 378150, G21K 100
Patent
active
047809043
ABSTRACT:
A focussable anti-scatter grid system comprising a plurality of X-ray photon absorptive strips mounted in spaced serial array to front and rear support plate mechanisms; the front and rear support plate mechanisms being slidably mounted to each other from front to back and fixedly mounted to each other from side to side; the rear ends of the strips being rotatably mounted to the rear support mechanism in fixedly spaced rear mounting slots; the front ends of the strips being slidably mounted to the front support plate mechanism in variably spaced front mounting slots, each front mounting slot focussing the longitudinal axis of a correspondingly mounted strip at a common focus, the focal length of the focus varying with the displacements of the front ends of the strips within the front mounting slots; a master guide slot mounted in one of the front or rear plate mechanisms and a bearing connected to the other of the front or rear plate mechanisms, the bearing being slidably engaged within the master guide slot for slidable movement therethrough; the master guide slot having a predetermined front to back and side to side profile; a drive mechanism connected to one of the master guide slot or the bearing for sliding the bearing through the length of the side to side profile of the master guide slot; wherein the front and rear plates are slid front to back relative to each other according to the front to back profile of the master guide slot as the bearing slides through the side to side profile of the master guide slot.
REFERENCES:
patent: Re29894 (1979-01-01), Hounsfield
patent: 2659017 (1953-11-01), Bartow
patent: 2696634 (1954-12-01), Kizaur
patent: 3543024 (1970-11-01), Kantor
patent: 3790782 (1974-02-01), Inoue et al.
patent: 3997794 (1976-12-01), York et al.
patent: 4229651 (1980-10-01), Danos
Fields Carolyn E.
Freeman John C.
Oliverio M. Lawrence
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