Planmeca Proline EC ceph, Техническое руководство

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Chapter D - ADJUSTMENT & CALIBRATION
Planmeca Proline EC X-ray unit D-5
PANORAMIC X-RAY BEAM ADJUSTMENT
Technical Manual
Place the beam alignment tool into the secondary slot. Note which way round it goes. It is
advisable to leave the cassette in position as it will reduce the amount of scattered radiation.
Figure 2
Enter the service mode (see section “How to enter/exit the service mode” on page B-6). The
radiation beam from the first slot can now be checked without the rotating unit moving.
Darken the room sufficiently so that you will be able to see the image of the radiation beam on
the alignment tool (it is fluorescent and will glow when the radiation beam strikes it), but not so
dark that you cannot see the borders of the alignment rectangle.
Select kilovolt and milliampere values high enough to enable the radiation beam to be seen in
the darkened room. The actual values will depend on how dark the room is.
Protect yourself from radiation and press the exposure button. The beam image will appear
on the alignment tool. Observe the beam from behind the tubehead.
CAUTION Radiation is generated when the exposure button is pressed. Take adequate protection
measures. Keep the exposure time as short as possible.
The beam image should appear within the borders of the rectangle marked on the alignment
tool (if the beam is not correctly aligned see section “Primary slot adjustment, Planmeca Pro-
line EC Panoramic X-ray” on page D-6).
Figure 3
When the slot has been checked, and if necessary adjusted, exit the service mode and take a
ball phantom exposure to check the position of the patient positioning mechanism, see sec-
tion “PATIENT POSITIONING MECHANISM” on page D-11.
Beam alignment tool
Secondary slot
Collimator
mA
4
kV
68
UP
DOWN
PM 2002 CC X-RAY BEAM ALIGNMENT SCREEN no. 50972 NOTE: DO NOT LEAVE SCREEN IN DAYLIGHT
Radiation beam
Beam alignment tool
Primary slot