Ch.4 Checking Image Quality
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DRYPRO Vstage MODEL 793 Installation Manual Ver.1.00 2004.11
5
Check the results of calibration.
1)Touch the [RETURN] button after printing the
calibration sheet.
- Display will return to the service maintenance
mode screen.
2)Touch the [CORRECTION] button under the
[SERVICE 2] item again.
- The densitometer calibration/previous density
value selection screen will be displayed.
3)Touch the [PREVIOUS DENSITY] button.
- The densitometer calibration result screen will
be displayed.
4)Compare internal measured values at steps 01
through 12 with externally measured values. If
normal film was used for calibration, compare
values in the "Normal" column: if mammography
film was used, values in the "Mammography"
column should be compared.
- If results satisfy the following three conditions,
density calibration results may be judged to be
normal.
(A)The difference between all internal and external
measured values is /-0.03.
(B)The internal density value at the first step is:
For blue or mammography film
: 0.23 or less.
For clear film
: 0.13 or less.
(C)The internal density value at the twelfth step is:
For blue or mammography film
: 3.00 or more.
For clear film
: 3.80 or more.
- If the results of densitometer calibration are judged
to be abnormal, steps 2 through 5 should be
repeated.
6
Touch the [Return] button.
- Display will return to the service maintenance
mode screen.
2
1
3
The data in the
mammography column
must not be used when
normal film is used for
calibration. Likewise,
data in the normal
column must not be
used when calibration is
carried out using
mammography film.
