1.

Regarding flat-plate detectors: a. Caesium iodide is used as the scintillator b. They have the same detective quantum efficiency (DQE) as a conventional image intensifier c. They have the same dynamic range as a conventional image intensifier d. In a magnified field of view, the spatial resolution is increased e. Both contrast resolution and distortion are less in comparison with a conventional image intensifier

Answer»

a. True. 

b. True. The DQE for these detectors is comparable with an image intensifier (about 65%). 

c. False. The principal advantages of these detectors are increased dynamic range and improved spatial resolution. 

d. False. The spatial resolution when using a flat-plate detector does not improve with magnification. 

e. False. The contrast resolution is better and distortion is less.



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