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WorksheetsVETS 245 Film Radiography S2025
Total questions: 20
Worksheet time: 10mins
What is the first step in the manual film processing procedure in veterinary radiography?
Developing
Washing
Fixing
Drying
What is one purpose of the fixing stage in film processing?
To soften the film emulsion
To wash away excessive developer
To convert the latent image to the visible image
To clear away the unexposed/undeveloped silver halide crystal
What is the chemical compound that allows film to respond to light?
phosphor crystals
silver halide crystals
calcium tungstate
elemental silver
You have just puchased a new cassette with rare-earth screens. Which of the following is true?
You should have a green light in the dark room
You should use green-receiving (green sensitive) film
You should use blue-receiving (blue sensitive) film
You should have a green light in the dark room
An intensifying screen that contains large calcium tungstate crystals produces which of the following characteristics (compared to that with smaller crystals)?
Fast screen, more detail, high grain
Fast screen, less detail, high grain
Slow screen, less detail, high grain
Slow screen, more detail, low grain
In film radiography, calcium tungstate screens:
Fluoresce in the blue spectrum
Fluoresce in the green spectrum
Are more efficient than rare earth screens
Should be used with a green-receiving film.
Which of the following is TRUE about an x-ray film cassette?
It can be made of any plastic as long as it is bendable
It is designed to absorb scatter radiation
It must be sturdy and have a strong, reliable closure
It must have padding between the film and screen.
Non-screen film would most likely be used to take which type of radiograph?
Skull
Abdomen
OFA Hip
Dental
What is the primary purpose of using a safelight in the darkroom during film processing?
To harden the film emulsion
To provide visibility without exposing the film
To enhance the contrast of the developed film
To speed up the drying process of the film
What step of film processing is eliminated when using an automatic film processor?
Rinsing (Stop bath)
Developing
Drying
Fixing
What is NOT a component of a cassette in film radiography?
Lead front to absorb scatter radiation
Secure latches
Aluminum or bakelite to protect the film from light
Padding to maintain film-screen contact
What is the purpose of an intensifying screen?
Enhance contrast
Slow image production
Increase the amount of radiation need to make an image
Convert x-ray radiation to visible light
Which is the component of the screen that converts x-ray photons to light?
Phosphor crystal layer
Reflective layer
Protective coating
Base layer
What best describes rare earth phosphor crystals in an intensifying screen?
Emit primarily in the blue light spectrum
Require increased exposure factors compared to other screen types
Are slower than other screen types
Emit primarily in the green light spectrum
What is the primary function of the reflective layer in an intensifying screen?
To protect the phosphor layer
To provide structural support
To enhance light output towards the film
To absorb scatter radiation
Which of the following is a disadvantage of using a fast intensifying screen?
Improved image contrast
Reduced image detail
Higher radiation dose needed
Increased exposure time
What is the pH of the fixer chemicals?
Neutral
Slightly acidic
Slightly alkaline
Strongly alkaline
The invisible image formed on the film when it is exposed to x-ray radiation is:
Photon image
Latent image
Ghost image
Quantum image
Regarding film storage, the room should have:
High temperature, low humidity
Low temperature, low humidity
High temperature, high humidity
Low temperature, high humidity
If using both blue- and green-sensitive films, what color safelight should you use?
Dark red
Dark blue
Yellow-Green
Purple
