Checking The Film Density - Siemens MOMMOMAT 1000 Installation And Start-Up Instructions Manual

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Checking the film density

The sensitivity to be programmed must be determined by means of test exposures with
anode/filter combination Mo/Mo at 25 kV, or kV preferred by the customer, and 20 mm
plexiglass.
The plexi must extend at least 30 mm behind the rear edge of the detector marking on the
compression plate and 10 mm beyond the chest wall edge of the table.
The detector shall be nearest the chest wall.
When making test exposures, ensure correct positioning of the plexiglass plates.
Plexiglass plate
Fig. 4
NOTICE
Start with the sensitivity listed in table 1 and adjust a density of approx 1.5 ("Sensitivity
H"). Repeat this procedure on the other "wing" (base plate).
Change to the other film/screen combination, if used, and program "Sensitivity D" for the
density as above. Repeat this procedure on the other "wing" (base plate).
The final values are dependent on the type of cassette used and desired optical density.
Mammomat 1000/3000
Installation and Start-Up
Start-up and functional test of the IONTOMAT
Object table
approx
Detector nearest chest wall. Place the plexi plates in the same
position for all exposures and measure the density as shown
above on the emulsion side of the film.
Register 3
Measuring
point
40 mm
SP B7-230.033.07
Rev. 03 11.99
Minimum projecting
Length: 10 mm
Page 8 of 12 Siemens-Elema AB
SPS-UD
11
Solna, Sweden