Planmeca ProMax Technical Manual page 107

PANORAMIC BEAM AND PATIENT POSITIONING
MECHANISM ADJUSTMENT
Place the beam alignment tool to the sensor head alignment tool upside down as shown in
Fig. 15. Slide the beam alignment tool as down as it goes in this sensor head alignment tool
position.
Figure 15
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.
Protect yourself from radiation and press the exposure button. The beam image will appear
on the alignment tool. Observe the beam from behind the tube head.
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 be 4mm wide and it should appear clearly within the borders
of the rectangle marked on the alignment tool.
If the beam is correctly aligned take a ball phantom exposure according to the instructions
given in section 2.9 "Taking a ball phantom exposure" on page E-39. Exit the Pan mode X-
collimator calibration mode by touching the Cancel field.
In case the radiation beam is not correctly aligned, check first the sensor head position by
using a spirit level, refer to section 2.3 "Adjusting the sensor head angle" on page E-10. After
this the panoramic X-ray beam position must be adjusted as described in sections 2.4 "Pri-
mary collimator angle adjustment" on page E-12 and 2.5 "Panoramic beam adjustment" on
page E-14.
NOTE In case the X-ray unit is equipped with a fixed sensor head, adjust the panoramic X-ray
beam according to the instructions given in section 2.13 "X-ray unit with fixed primary
collimator - primary collimator adjustment" on page E-55.
Technical Manual
Chapter E - C-ARM AND IMAGING ARM
Beam alignment tool
(Note: upside down)
Planmeca ProMax E-9