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radiosensitive material that receives the remnant beam and forms an image of the body part
invisible image contained in film prior to processing
can be seen in film after processing
Manifest or Visible Image
emits light only when stimulated
provides a dynamic (moving) image such as a patient swallowing barium sulfate.
decrease in useful beam as it is partially absorbed by body part
radiation remaining after passing through the body part – strikes the image receptor and forms the image
continues to emit light after stimulation
The purpose of intensifying screens is to ________________ the amount of exposure required to produce an
When using intensifying screens, _____% of the image is actually formed by light from the intensifying
- screens striking the film.
Screen __________ refers to how efficiently the screen converts x-ray energy to light energy. As screen
- speed increases, the number of x-rays needed to produce adequate density ______________.
Higher speed screens are made by using a thicker _________________ and an increase in __________ size.
phosphor layer; crystal
A 100 speed screen is ___________(faster/slower) than a 400 speed screen. If 20 mAs is required using a 100 speed screen, __________ mAs is required using a 400 speed screen to produce an equal film density.
slower; 5 mAs
The ______________________ test is used to monitor screen film contact.
A layer of lead foil may be found in the back of a cassette to prevent _____________ from fogging the film.
Pairing a green-light emitting screen phosphor with a film sensitive to green light is termed _____________________.
__________________________ are unwanted marks or images appearing on a radiograph.
Film emulsion is composed of __________________________ suspended in _________________.
silver halide crystals; gelatin
_____19. Using a higher speed screen and decreased mAs results in
A. Higher patient dose
B. Greater radiographic detail
C. Inadequate contrast
D. Increased Quantum mottle
Which of the following is NOT a purpose of the film cassette?
A. Prevent light from exposing the film
B. Prevent marks from scratching and bending of film
C. Restricts the x-ray beam to a certain area
D. Provide support for intensifying screens
Poor film-screen contact results in:
A. reduced image detail
B. increased beam penetration
C. increased light leaks in the darkroom
D. none of these
Refers to the property of a film which allows a large range of exposures that result in useful film density.
Refers to matching the color sensitivity of x-ray film to the color of light emitted by the intensifying screen.
Refers to the practice of using the oldest film on the shelf first.