Items tagged “fluoro”
4 results found
Article
Fluoroscopy
Fluoroscopy is an imaging modality that allows real-time x-ray viewing of a patient with high temporal resolution. It is based on an x-ray image intensifier coupled to a still/video camera. In recent years flat panel detectors (like those used in direct digital radiography) have been replacing t...
Article
Fluorography
Fluorography is the use of relatively intense (50-1000mA), pulsed x-ray exposures (pulses are of short duration and applied at 1-12 pulses/second) to form an x-ray image.
The resultant images have a relatively high signal to noise ratio (SNR), i.e the images are of better quality than those ac...
Article
Photocathode
A photocathode is a negatively charged electrode in a light detection device such as the input screen in an image intensifier (II) that is coated with a photosensitive compound. When this is struck by light photons, the absorbed energy causes electron emission due to the photoelectric (PE) effec...
Article
Fluoroscopy vs fluorography
Fluoroscopy and fluorography are very similar imaging techniques and, in many instances, can be performed on the same equipment.
Fluoroscopy vs fluorography
Fluoroscopy
low current (0.5-5 mA), continuous or near-continuous x-ray exposures
relatively low signal to noise ratio (SNR)
prioritis...