Screen Quiz
1) Intensifying screens main purpose is to ______ ______ ______.
2) The layer of the screen that can redirect light towards the film is called the _______ layer. This layer can nearly double the amount of light hitting the film.
3) ______ ______ is a measurement of how well phosphors emit light per x-ray photon.
4) __________ is the ability of a material to emit light.
5) A normal intensifying screen will last ______ ______ years.
6) _______ _______ phosphors are now used almost exclusively because that have a much greater conversion efficiency and DQE.
7) Three factors that impact screen resolution are phosphor crystal size, packing density, and _______ _______.
8) Phosphor crystal size and layer thickness are _________ related to resolution.
9) T or F: Packing density is inversely related to resolution.
10) ________ _______ is caused by an insufficient quantity of photons hitting the intensifying screen.
11) Which screen is more sensitive to light photons, The top screen or the bottom screen?
12) Which film screen speed will produce the most dose to the patient, A 400RS or a 200 RS?
Answers
1) Reduce Patient Dose
2) Reflective
3) Conversion Efficiency
4) Luminescence
5) 5-7
6) Rare Earth
7) Layer Thickness
8) Inversely
9) False, the greater the packing density the smaller the crystals which will raise resolution
10) Quantum Moddle
11) Bottom
12) 200RS
