Fluoroscopy Equipment . Introduction. Fluoro: is dynamic radiographic examination Fluoroscopy is primarily domain of the radiologist The role of radiographer to assist and routine post-fluoroscopic radiography Fluoroscopy was discover 1896. Types of equipment.
Lens coupling:- uses a pair of optical lens and a “beam splitting mirror” (to enable other accessories like spot film camera or cine camera) and an aperture.- loss of image brightness due to lens system and beam splitting.- Aperture controls the amount of light passes through to the TV camera.
- A wide aperture will allow most light on to the video camera, thus reducing patient dose but the image will have high noise.- A narrow aperture will allow only a fraction of the light on to the video camera, thus increasing patient dose but reducing the image noise.
Fibre optic coupling:uses fibre optic cables thus reducing light loss from the II to video cameraprevents any additional accessories being used.Preserves better spatial resolution
Video Viewing System
Most commonly used is video as close circuit through cables to avoid broadcast interference
System include video camera attached to II, 3 types are Vidicon or PlumbiconTM tube or CCD
CCDs have been developed primarily for the domestic video camera market They are:- compact- lightweight - possess improved camera qualities compared to photoconductive cameras.
A scanning electron beam in an evacuated environment is not required,The image is read by electronic means.CCD Chips are manufactured with different numbers of sensor arrays;512 x 512 1024 x 1024 2048 x 2048