intensifying screen


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screen

 [skrēn]
1. a framework or agent used as a shield or protector; called also protectant and protective.
2. to separate well individuals in a population from those who have an undiagnosed disease, defect, or other pathologic condition or who are at high risk by means of tests, examinations, or other procedures. See also screening.
Bjerrum screen tangent screen.
fluoroscopic screen a phosphorescent screen that shows the movement and relationship of organs and structures in fluoroscopy.
intensifying screen a fluorescent screen used in conjunction with x-ray film to enhance the effect of the radiation and reduce dosage to the patient. The screen must be matched to the emissivity range; the emissivity of phosphorus is similar to that of the human eye, so that phosphors absorb x-ray energy and convert it to visible light.
tangent screen a large square of black cloth with a central mark for fixation; used with a campimeter in mapping the field of vision.

in·ten·si·fy·ing screen

a screen (6) used in radiography.

in·ten·si·fy·ing screen

(in-tensi-fī-ing skrēn)
Material consisting of phosphors present in the radiographic cassette that converts the invisible energy of an x-ray beam into visible light energy, augmenting the intensity of film exposure.
References in periodicals archive ?
Intensifying screens need the maximum amount of care during handling.
3, 4) were obtained using higher kVp settings and intensifying screens, the resulting higher-contrast radiographs obscured some skeletal detail and prevented visualization of low-density structures such as the cartonnage.
The use of intensifying screen cleaner and anti-static solution as specified by the manufacturer is highly recommended.
Instead of fluorescing when exposed to radiation as intensifying screens do, imaging plates store the energy following an x-ray exposure until the plate is placed in a plate reader.
An x-ray tube still was used, but intensifying screens and film no longer were necessary.
Light emission was detected by exposure to Fuji RX autoradiography film in the presence of Cronex intensifying screens (Fisher Scientific).
The authors present practical information on clinical radiography, going a step further than many radiology texts to explain, in detail, the scientific basis for radiology processes, such as image transformation, film composition, and intensifying screens. Mathematical computations used in oral imaging are reviewed and accompanied with numerous examples.