Siemens ARCADIS Varic - Page 20

ARCADIS Varic SPR2-310.662.01 Page 6 of 10 Siemens AG
Rev. 02 05.06 CS PS SP Medical Solutions
5 - 6 Function tests
Work sequence:
1. Select full size (no zoom).
2. Adjust the Iris diaphragm to an opening of about 15 cm.
3. Adjust C-arm (see Fig. 4).
4. Switch on fluoroscopy briefly.
5. Read the evaluation at the TV Monitor (Fig. 5).
(Use stored image).
6. Calculate the deviation
7. Test results (see also Fig. 3):
Fig. 5
:
Average deviation permissible* Average deviation actual
Basic position must be < 33 mm
(equal to > 80% over-
lapping of the visible
area)
...................... mm
C-arm to the left must be < 33 mm
(equal to > 80% over-
lapping of the visible
area)
...................... mm
C-arm to the right must be < 33 mm
(equal to > 80% over-
lapping of the visible
area)
...................... mm
A = mid-point I.I. input
B = middle of the radiation
field
∆ = deviation of A to B
x = deviation in the x-axis
y = deviation in the y-axis
B
∆
A
y
x
x
2
+ y
2