ABSTRACT
Fluoroscopic television systems are always closed circuit systems. The video signal is transmitted from one component to the next through cables rather than through the air as in broadcast television. Increasing the bandwidth will allow the television camera pick-up tube to turn on and off more times per second. The television image is stored as an electron image on the target of the vidicon tube and is scanned along 525 lines by a narrow electron beam 30 times/sec. The camera and television monitor will affect the contrast of the television image. Contrast levels can be adjusted on the television monitor. The camera control unit adds synchronization pulses to the video signal at the end of each scan line and scan field. Television image quality is affected by the number of scan lines and the bandpass of the system. More specifically, horizontal resolution, vertical resolution, contrast, and brightness have an effect on the quality of the television image.
