Digital Imaging Physics Exam questions and answers
Graded A+ latest updates
latent image
invisible image created after exposure but before processing
manifest image
visible image after processing
Digital Imaging (post processing)
allows for manipulation of the image to reduce repeats
Spatial Resolution
greater amount or number of small pixels improves _______.
Pixel
smallest component of the matrix, each _____ ,one brightness level
pixel bit depth
the number of shades of gray that 1 pixel can display
Pixel density
number of pixels per unit area; high pixel density increases spatial resolution
Pixel pitch
distance between the center of adjacent pixels; a smaller pitch increases spatial
resolution
Brightness
amount of luminescence of a display monitor.
contrast resolution
the ability of a system to distinguish between objects that attenuate similarly
Dynamic Range
, number of shade of greys, ability of detector to capture wide range of photon
intensities
dynamic range
A high ___________ has many shades of gray.. influenced by bit depth.
contrast resolution
pixel bit depth, greater the bit depth, greater ________.
Computed Radiology (CR)
digital imaging system that uses a cassette, photostimulable phosphor plate, plate
reader, and a computer workstation to acquire and display a digital image.
Photostimuable luminescence
IR is placed in the reader, the IP is removed and scanned by a helium-neon laser
beam to release the stored energy (trapped electrons) as visible light
photostimulable phosphor (PSP)
A plate made up of several layers that stores x-ray energy as a latent image for
cassette-based digital systems
10,000
PSPs are estimated to have a life of _______ readings.
Photostimulable luminescence (PSL)
reader uses helium-neon laser to release light. "scanned by a helium-neon laser
beam to release the stored energy.
Analog-to-Digital Converter (ADC)
Converts analog signal to digital numbers
Digital Radiography (DR)
Uses a flat panel detector instead of an IP called a Detector Array
Indirect DR
Graded A+ latest updates
latent image
invisible image created after exposure but before processing
manifest image
visible image after processing
Digital Imaging (post processing)
allows for manipulation of the image to reduce repeats
Spatial Resolution
greater amount or number of small pixels improves _______.
Pixel
smallest component of the matrix, each _____ ,one brightness level
pixel bit depth
the number of shades of gray that 1 pixel can display
Pixel density
number of pixels per unit area; high pixel density increases spatial resolution
Pixel pitch
distance between the center of adjacent pixels; a smaller pitch increases spatial
resolution
Brightness
amount of luminescence of a display monitor.
contrast resolution
the ability of a system to distinguish between objects that attenuate similarly
Dynamic Range
, number of shade of greys, ability of detector to capture wide range of photon
intensities
dynamic range
A high ___________ has many shades of gray.. influenced by bit depth.
contrast resolution
pixel bit depth, greater the bit depth, greater ________.
Computed Radiology (CR)
digital imaging system that uses a cassette, photostimulable phosphor plate, plate
reader, and a computer workstation to acquire and display a digital image.
Photostimuable luminescence
IR is placed in the reader, the IP is removed and scanned by a helium-neon laser
beam to release the stored energy (trapped electrons) as visible light
photostimulable phosphor (PSP)
A plate made up of several layers that stores x-ray energy as a latent image for
cassette-based digital systems
10,000
PSPs are estimated to have a life of _______ readings.
Photostimulable luminescence (PSL)
reader uses helium-neon laser to release light. "scanned by a helium-neon laser
beam to release the stored energy.
Analog-to-Digital Converter (ADC)
Converts analog signal to digital numbers
Digital Radiography (DR)
Uses a flat panel detector instead of an IP called a Detector Array
Indirect DR
