RADT 146 C - Unit 3: Computed Radiography
Questions with100% Correct Answers
Computed Radiography (CR)
generic term applied to an imaging system comprised of: PSP, CR Reader, and digital electronics
Photostimulable Storage Phosphor (PSP)
screen that acquires the x-ray projection (aerial) image; replaces the 'film' and 'intensifying
screen' components in screen-film imaging
CR Reader
extracts the electronic latent image; replaces the 'chemical processor'
digital electronics
converts the analog signals (latent image) to digital form (manifest image)
similarities between screen-film and CR
-both use an x-ray sensitive imaging receptor (both incased in a protective cassette)
-both can be used interchangeably with any x-ray imaging system
-both carry a latent image that must be visible by processing
screen-film processing
image manifested through chemical processing
CR processing
analog image converted into digital signal
, 1983
CR was commercially introduced by Fuji
2016
over 25,000 CR systems were sold worldwide (44 countries including India, China, Middle East,
Russia, South America, and Africa)
2020
over 60,000 CR systems were projected for one year in sales
photostimulable luminance (PSL)
the enabling of halide-based phosphors to store x-ray energy temporarily, which is then released
upon excitation by a laser beam
imaging plate (IP)
PSP is housed and positioned within this cassette
barium fluorohalide
commonly used phosphor material for CR imaging
turbid structure
similar to emulsion, phosphor particulates are bonded with a cohesive material forming a muddy
structure that has been hardened and deposited on a base for mechanical support
CR Image Processing Steps
Questions with100% Correct Answers
Computed Radiography (CR)
generic term applied to an imaging system comprised of: PSP, CR Reader, and digital electronics
Photostimulable Storage Phosphor (PSP)
screen that acquires the x-ray projection (aerial) image; replaces the 'film' and 'intensifying
screen' components in screen-film imaging
CR Reader
extracts the electronic latent image; replaces the 'chemical processor'
digital electronics
converts the analog signals (latent image) to digital form (manifest image)
similarities between screen-film and CR
-both use an x-ray sensitive imaging receptor (both incased in a protective cassette)
-both can be used interchangeably with any x-ray imaging system
-both carry a latent image that must be visible by processing
screen-film processing
image manifested through chemical processing
CR processing
analog image converted into digital signal
, 1983
CR was commercially introduced by Fuji
2016
over 25,000 CR systems were sold worldwide (44 countries including India, China, Middle East,
Russia, South America, and Africa)
2020
over 60,000 CR systems were projected for one year in sales
photostimulable luminance (PSL)
the enabling of halide-based phosphors to store x-ray energy temporarily, which is then released
upon excitation by a laser beam
imaging plate (IP)
PSP is housed and positioned within this cassette
barium fluorohalide
commonly used phosphor material for CR imaging
turbid structure
similar to emulsion, phosphor particulates are bonded with a cohesive material forming a muddy
structure that has been hardened and deposited on a base for mechanical support
CR Image Processing Steps
