RADT 146 EXAM PREP QUESTIONS
ANSWERS BUNDLED SOLUTIONS HIGH
QUALITY PRACTICE MATERIAL
●● Photostimulable Storage Phosphor (PSP) screen
Answer: to acquire the x-ray projection (aerial) image
●● CR Reader
Answer: to extract the electronic latent image
●● Digital electronics
Answer: to convert the analog signals to digital form
●● SCREEN-FILM IMAGING
VS. COMPUTED RADIOGRAPHY (CR)
Answer: • Both use an x-ray sensitive image 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 made visible by
processing
, ●● Screen film imaging
VS. Computed radiography (CR) differ in processing
Answer: • Screen-film: image manifested through chemical processing
• CR: analog image converted into digital signal
●● Types of screen film
Answer: X-ray beam, Patient,
Aerial image, Intensifying screen (emits light), Film (latent image),
Chemical processing, and Manifest Image
●● HISTORY OF COMPUTED
RADIOGRAPHY
Answer: • Commercially introduced in 1983 by Fuji
• 2016- Over 25,000 systems sold worldwide (44 countries including
India, China, the Middle East, Russia, South America, and Africa.)
• 2020- over 60,000 is projected for one year in sales
●● CR technology is based on certain halide-based phosphors having
energy storage and excitation
characteristics known as photostimulable luminance
(PSL) which
Answer: 1. Enable phosphors to store x-ray energy temporarily
2. Release that energy upon excitation by a laser beam
ANSWERS BUNDLED SOLUTIONS HIGH
QUALITY PRACTICE MATERIAL
●● Photostimulable Storage Phosphor (PSP) screen
Answer: to acquire the x-ray projection (aerial) image
●● CR Reader
Answer: to extract the electronic latent image
●● Digital electronics
Answer: to convert the analog signals to digital form
●● SCREEN-FILM IMAGING
VS. COMPUTED RADIOGRAPHY (CR)
Answer: • Both use an x-ray sensitive image 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 made visible by
processing
, ●● Screen film imaging
VS. Computed radiography (CR) differ in processing
Answer: • Screen-film: image manifested through chemical processing
• CR: analog image converted into digital signal
●● Types of screen film
Answer: X-ray beam, Patient,
Aerial image, Intensifying screen (emits light), Film (latent image),
Chemical processing, and Manifest Image
●● HISTORY OF COMPUTED
RADIOGRAPHY
Answer: • Commercially introduced in 1983 by Fuji
• 2016- Over 25,000 systems sold worldwide (44 countries including
India, China, the Middle East, Russia, South America, and Africa.)
• 2020- over 60,000 is projected for one year in sales
●● CR technology is based on certain halide-based phosphors having
energy storage and excitation
characteristics known as photostimulable luminance
(PSL) which
Answer: 1. Enable phosphors to store x-ray energy temporarily
2. Release that energy upon excitation by a laser beam
