X-ray or gamma ray systems or devices – Photographic detector support – With object support or positioning
Patent
1985-10-28
1987-03-17
Howell, Janice A.
X-ray or gamma ray systems or devices
Photographic detector support
With object support or positioning
378181, G03B 4202
Patent
active
046513370
ABSTRACT:
A method and apparatus for controlling motion of power driven mechanisms in a medical x-ray spot filming system in order to minimize induced vibrations of x-ray film due to acceleration and deceleration of the power driven mechanisms. The invention includes a method and apparatus for establishing a desired profile of position of the x-ray associated mechanisms as a function of time and for implementing a move of the mechanism in accordance with the desired profile. In one form the profile is divided into a plurality of equal time increments and the motion of the mechanism is computed for each time increment as a function of a particular change in position such that a move can be completed within a fixed time interval. Depending upon the length of the move, a change in position for each time increment is determined and the mechanism is moved in accordance with the computed position change for each time increment.
REFERENCES:
patent: 3862426 (1975-01-01), Thomas
patent: 4105920 (1978-08-01), Pury et al.
patent: 4432095 (1984-02-01), Adelmeyer et al.
Bautista Bruce Q.
Boomgaarden Jonathan C.
Davis Charles R.
Frank Steven R.
General Electric Company
Howell Janice A.
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