Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-08-08
1987-06-30
Howell, Janice A.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
378 99, H04N 532
Patent
active
046774777
ABSTRACT:
Improved apparatus, circuitry and method is disclosed for control of a television camera in a radiographic imaging system. The system includes a radiation source, an image intensifier tube and several associated components for acquiring analog radiation representing images in one or more of several prime analog study modes. The analog acquisition components include any one or a combination of a cine camera, a spot film camera and a spot film device. Radiation is directed from the source through a subject to the intensifier tube input and to selected analog acquisition components. As the analog images are acquired, a television camera views the image tube output to produce another image, by way of a monitor, in verification that the radiation exposure is of a character suitable for the selected analog image acquisition mode. Sets of representations of camera operating parameter value decisions are stored in non-volatile random access memory circuitry coupled to the camera. Each set of representations corresponds to a different analog study mode, or combination of modes. Means is provided for selection of one or a combination of analog study modes. In response to that selection, the corresponding set of camera operating parameter decision representations is applied to the camera, in order to optimize camera performance for the particular x-ray mode, or combination of modes, which has been selected. In another embodiment, apparatus and circuitry is provided for suppressing the camera video signal in response to a selection of a predetermined video camera scan rate, while maintaining transmission of synchronization signals from the camera to the monitor.
REFERENCES:
patent: 3337685 (1967-08-01), Bougle
patent: 3439114 (1969-04-01), Taylor
patent: 3622786 (1971-11-01), Walker et al.
patent: 4063092 (1977-12-01), Berdahl
patent: 4472826 (1984-09-01), van de Ven
Nicolay David
Plut Leonard F.
Howell Janice A.
Picker International Inc.
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