Ch.4 Checking Image Quality
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DRYPRO Vstage MODEL 793 Installation Manual Ver.1.00 2004.11
In facilities where multiple film types are used, one internal densitometer calibration for one
specific film type will be valid for all film types.
The film type combinations for densitometer calibration are shown below.
Combination
Film Type Combination
Film Type Calibrated
Number
M
B
C
1
*
*
*
M
2
*
*
M
3
*
*
M
4
*
M
5
*
*
B
6
*
B
7
*
C
- In the above chart, "M" represents mammography-film, "B" blue film and C clear film. Whether or
not M is PCM oriented is irrelevant.
- The "*" symbol indicates that the corresponding film is used at the facility.
- Film types corresponding to the combination numbers should be calibrated.
In cases where the same film is used in 2 trays, the supply tray in which the larger film size is
loaded should be selected for calibration.
If the film configuration is changed after installation, check whether or not the changes affect the
combination numbers shown above.
If there are changes in the combination numbers, internal densitometer calibration should be re-
executed according to the chart above.
The densitometer used should meet the requirements set out in "4.2.1 Conditions Required for
Calibration" and "4.2.2 Density Check Procedure" on the previous page.
Example 1
Where there are changes in the film type calibrated:
The existing configuration in which blue film only is used is changed to allow usage of
mammography and blue film.
"Combination No. 6"
→
"Combination No. 2"
→
Recalibration using mammography film
Example 2
Where there are changes in the film type calibrated:
The existing configuration in which mammography film only is used is changed to allow
usage of mammography and blue film.
"Combination No. 4"
→
"Combination No. 2"
→
Recalibration unnecessary
4.2.3
Conditions for Implementation
The film types for which internal densitometer calibration is carried out are described blow.
The following information should be used as reference only in cases where the
internal densitometer is calibrated at the facility where DRYPRO 793 is installed.
