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Physics of Med Rad
Medical Radiation
Question | Answer |
---|---|
Fluoroscopy | viewing dynamic studies of the human body |
Flux gain | number of output light photons/number of input x-ray photons |
Minification gain | ratio of the square of the diameter of the input phosphor to the square of the diameter of the output phosphor |
Brightness Gain | minification gain x flux gain |
Conversion factor | ratio of the intensity of illumination at the output phosphor to the radiation intensity at the input phosphor |
Interventional radiology | a subspecialty of radiology in which minimally invasive procedures are performed using image guidance |
angiography | imaging the blood vessels for abnormalities using various contrast media |
Balloon angioplasty/stent | opening of narrow or blocked blood vessels using a balloon |
Chemoembolism | delivering cancer treatment directly to a tumour through its blood supply |
Multified image intensification | allows focal point change to reduce field of view and magnify the image |
Image matrix | a two-dimensional array of numbers in rows and columns |
Dynamic range | the number of shades of gray that can be represented (measured in bit) |
CT number | numeric value of each pixel |
photostimulated luminescence | the release of stored energy within a phosphor by stimulation with visible light, to produce a luminescent signal |