test 3 review Flashcards
in film, the most important layer is the _________
emulsion
true or false: digital systems are more sensitive to scatter radiation
true; they have a wider dynamic range
what component of the CR reader converts light to an electric signal?
photodetector
when x-rays strike the PSP material, _________ is released
light
the arrangement of pixels in rows/columns is a ___________
matrix
true/false: the look-up table that is used to determine the brightness/contrast of an image is unique for each anatomic part
true
latent image formation occurs during film __________
exposure
Europium serves as _______________
an activator for the phosphor
two methods for indirect capture DR include _______________
charged couple device, TFT array/scintillator
direct imaging formation (DR) converts x-rays into __________
electrons
which of the following increases as the matrix size of a display monitor increases?
spatial resolution
window and leveling on a workstation changes the digital image’s
brightness and contrast
the scintillator for the indirect capture DR system that utilizes a CCD
cesium iodide
true/false: after the digital data leaves the ADC, the process of image formation is very different for the 2 types of DR systems
false (it’s largely the same)
fluorescence refers to…
the ability of phosphors to emit visible light only while exposed to x-rays
