LRA 221 FINAL EXAM REVIEW !!!!!!! UPDATED 2025/2026

LRA 221 FINAL EXAM REVIEW !!!!!!!
UPDATED 2025/2026
CR creates an image through the use of a:
Answer: Storage phosphor plate


The two components needed to change light into an electrical signal in indirect
capture DR are the TFT and ______:
Answer: Photodiode


The x-ray absorber most commonly used in direct capture DR is a:
Answer: Photoconductor


The active material in a storage phosphor is:
Answer: Barium fluorohalide


In PSP image capture, to release the latent image a ______ is scanned across
the phosphor plate.
Answer: Focused laser light


the ________ directly converts x-ray energy into a digital electrical signal
photoconductor




exposure latitude in conventional radiography is similar to ________ in DR
dynamic range

, A look-up table maps:
Image gray scale values




all of the following are part of a PACS except
independent Kvp & mAs




indirect capture DR changes absorbed x-ray energy into visible light
true




DICOM is a standard that enables imaging modalities and PACS to communicate
true




Each square in a matrix is referred to as
pixel or picture element




The number of bits per pixel is known as bit:
depth




the pixel is determined by the