*frequency of scan does not meet grid frequency
-can be prevented by using appropriate grid
antistatic/backing layer
*mounted to the back of cassette *prevents handling artifacts *contains barcode *prevents static energy
when should you use a grid
*kVp higher than 60
*whent the part being xrayed is at least 12cm thick
what is the third step in the conversion of a latent image to manifest image in the IRD
*light is captured by CCD, which converts it to an electronic signal
radiopaque
cannot be penetrated by xrays
what are some other terms for CR
*indirect capture
*cassette-based
*film-less
turbid phosphor
phosphor crystals distributed throughout a phosphor layer
what is the first step in the conversion of a latent image to manifest image in the IRD
*there is an initial low level laser scan that sets boundries for collimation of the image and test to make sure latent image matches histogram selected before setting aut-rescaling
what controls contrast resolution
*dynamic range *quantization
what is the second step in the conversion of a latent image to manifest image in the IRD
*high level lase scan to release trapped electrons from f center and back into their regular state, causing emision of light