Digital detector questions in class Flashcards
(36 cards)
A tape, a disc are __
archiving info
The __ represents zero or one
bit
digital imaging cassettes and film screen sets can be used interchangeable with any x-ray system t or f
true
A digital imaging screens respond to radiation with what
photostimulable plates
The four steps of creating an image with digital imaging equipment are what steps
erase always last
Digital imaging has a ___ compared to film screen
better contrast resolution
film has a better ___then film
dynamic range
___is prevented when erased with light
ghosting
A latent image is formed on what in digital imaging
on the radiation detector
spatial resolution is increased with what in digital imaging
matrix size
the number of of grays in digital imaging is determined by what
bit-depth
__ requires the largest matrix size
mammography
the typical matrix size for digital radiography is what?
1024 x 1024
spatial resolution is determined by the ratio what to what
matrix size
digital imaging cassette based uses what for latent image formation
photostimulable (psp) –
charged couple device in digital radiography provides what
good resolution —more to answer
Flat panel devices use ___
thin film transistors
spatial resolution is limited to what in digital imaging
pixel size
human visual system can visualize how many shades of gray
30
the number of grays a system can reproduce is called a what?
dynamic range
the ___digital system uses the highest dynamic range
mammography
digital imaging pt dose can be reduced by using
higher KVP
DQE stands for what
detective quantum efficiency
higher probability of
detective quantum efficiency
