| 释义 |
DictionarySeescreenFluoroscopic screen
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.Fluoroscopic screenA fluorescent screen which displays "moving x-rays" of the body. Fluoroscopy allows the radiologist to visualize the guide wire and catheter he is moving through the patient's artery.Mentioned in: Angiography |