The International Commision on Radiation Units and Measurements now recommends this formula to quantify the increase in brightness created by an image intensifier.
A form of diagnostic radiology that allows moving body structures to be examined via X-ray through the use of a fluoroscope and a contrast agent. The image is viewed on a monitor as a kind of moving X-ray.
Metals emit electrons in response to light stimulus.
Electronic vacuum tube that converts the remnant beam to light, then to electrons, then back to light, increasing light intensity in the process.
A device that takes the video (analog) signal and divides it into a number of bits (1s and 0s) that the computer "understands".
flux gain x minification gain
number of light photons at the output phosphor to the number of light photons emitted in the input phosphor and represents the tube's conversion efficiency.
___ charged plates along the length of the image-intensifier tube that repel the electron stream, focusing it on the small output phosphor. (electrostactic focusing lenses)
Down
Maintains a constant potential of approximately 25 kv.
Expression of the degree to which the image is smaller from input phosphor to output phosphor.
Absorbs the remnant xray photon energy and emits light.
Absorbs electrons and emits light in response.
Function of fluoroscopy unit that mainatains the overall appearance of the fluoroscopic image by automatically adjusting the kvp, mA or both.
Invented the first commercially available fluoroscope.
As an image intensifier ages, the exposure rate to the patient ___ to maintain brightness.
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