User manual

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2. Expose the calibration film to a known dose about 30% greater than the highest
dose expected for an application film. One way is to use a linear accelerator to
expose a 10 cm x 10 cm, but the choice is up to the user. The goal is to create a
large area of uniform exposure on the film. Note the time of the exposure.
Remove the film and keep it where it is not exposed to light.
3. Repeat Step 1using another film from the same production lot. Using the same
exposure source and exposure conditions and setup, expose the film to a known
dose about 20% of that used for the first film. Note the time of exposure. The
time window within which the calibration films are exposed is related to the speed
with which the scanning and calculations can be completed. Your efficiency
increases by minimizing the time window. If the exposures are t min. apart, film
scanning can be done 4t min. later, or any time thereafter. Remove the film and
keep it where it is not exposed to light.
4. While unnecessary, additional calibration films could be generated by repeating
Step 3 with different exposure doses.
5. Turn on the scanner, connect a computer and open FilmQA
™
Pro. From the
drop-down menu (Figure 1) under “Case Object Management” select “Film
Calibration (ordinary)”. Note: The calibration will be valid for other films from the
same production lot scanned on the same scanner.