X-ray or gamma ray systems or devices – Electronic circuit – Exposure timer
Patent
1985-02-01
1987-05-05
Church, Craig E.
X-ray or gamma ray systems or devices
Electronic circuit
Exposure timer
358111, H05G 164
Patent
active
046637737
ABSTRACT:
An x-ray diagnostic installation has a video display system connected to the output of an x-ray image intensifier, the video system including a subtraction stage with a weighting circuit connected to an image memory for suppressing image noise the subtraction stage also having a difference forming element for subtracting image information arising at different times. The output of the difference forming stage is supplied to a threshold circuit and the output of the threshold circuit is read into another image memory picture element-by-picture element. This memory is connected to the weighting circuit such that the output thereof controls the parameters of the weighting circuit picture element-by-picture element. A filter circuit may be interconnected between the output of this memory and the weighting circuit.
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Haas Werner
Haendle Joerg
Church Craig E.
Freeman John C.
Siemens Aktiengesellschaft
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