18 Questions
What is the effect of increasing the speed of the screen?
Lower resolving power
What type of light is emitted by Rare Earth screens?
Green light
What is the purpose of adding titanium dioxide to the screen?
To increase the sensitivity of the intensifying screen
Which type of film has less contrast and high speed?
Skull film
What is the function of the base in the intensifying screen composition?
To provide mechanical support
How much more sensitive are intensifying screens to x-rays compared to conventional screens?
10 - 60 times
What is the primary function of the adhesive layer in X-ray film?
To attach the emulsion to the film base
What is the composition of silver halide crystals in the emulsion?
80-99% Silver bromide and 1-10% Silver iodide
What happens to the silver halide crystals during X-ray exposure?
They absorb radiation and store energy
What is the result of the density of an object affecting the intensity of energy on the silver halide crystals?
The silver halide crystals are not energized in certain areas
What is the purpose of the protective layer in X-ray film?
To protect the emulsion from scratches and damage
What is the thickness of the film base in X-ray film?
2mm
What is the primary factor that affects the film speed?
Size and shape of the AgBr crystals
What is the advantage of a double emulsion film?
Increase in speed
What is the characteristic of film that refers to the amount of radiation needed to produce a radiograph of standard density?
Speed
Which of the following statements is true about F-speed film?
It requires less radiation than D-speed film
What is the relationship between the size of AgBr crystals and the film speed?
Increase in size results in increase in speed
What is the recommended storage condition for film?
50º-70ºF with 30-50% humidity
Learn about the factors that affect film speed in radiography, including the size and shape of AgBr crystals, emulsion thickness, and the difference between D-speed and F-speed films.
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