Start-up and functional test of the IONTOMAT
11 - 11
Siemens-Elema AB
Register 3
SP B7-230.033.07
Page 11 of 12
Mammomat 1000/3000
Solna, Sweden
Rev. 03
11.99
SPS-UD
Installation and Start-Up
Checking cut-off dose and resolution (§16 Germany)
11
This test is only required in the Federal Republic of Germany in the area of application of
the X-ray decree. The result must be entered in the acceptance test certificate supplied.
Both tables must be checked.
Ascertain the cut-off dose (K
B
) and resolution (R
g
) with the NORMI 7 test body
Procedure:
1.
Select 30 kV and AEC (Iontomat) on the control panel.
2.
Place the NORMI 7 test body on the object table flush with the chest wall side.
3.
Slide film cassette into the object table.
4.
Trigger the first exposure.
5.
Note the mAs reading (Q
G(1)
) shown on the control panel.
6.
Develop the film. Measure the resolution (R
g
) and the density (D) and enter in the
form.
7.
Position the dosimeter chamber in the cassette slot.
8.
Select 250 mAs on the control panel.
9.
Trigger second exposure.
10.
Record the dose value (K
B(2)
) measured as well as the associated mAs reading
(Q
G(2)
)
11.
Calculate and record the cut-off dose as follows:
Fig. 7
1st exposure
2nd exposure
NORMI 7
test body
Double detector
Radiographic system
Film cassette
NORMI 7
test body
Double detector
Radiographic system
Dosimeter chamber
Test arrangement (front view)
K
B
K
B 2
( )
Q
G 1
( )
Q
g 2
( )
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⋅
=
