Listed below are instructions on adjusting the positioning lasers on a ProOne.

1. To adjust the light beam angle, rotate the lens assembly.
2. To adjust the light beam vertical position, first loosen the fastening screw of the light assembly and then turn the assembly.

   NOTE: For Layer Light, access to the fastening screw is blocked by the sensor frame. The layer light assembly can be turned without loosening the fastening screw.

3. To focus the light beam, adjust the depth of the lens assembly.
4. To adjust the light beam horizontal position, first loosen the fastening screw of the lens assembly and then reposition the assembly.

• Attach the ball phantom.
• On the Patient Support Calibration (T3430) screen, touch the Go button in the field Drive C-arm to Layer 0. This will move the C-arm to the position where the layer light beam has to hit the reference line on the ball phantom support plate (see figure below). The three patient positioning lights will be automatically switched on.
• Carefully adjust the position of the layer light by using a pair of pliers or a similar tool.
• Adjust the layer light position until the light beam coincides with the reference line on the ball phantom support plate.
• Exit the Patient Support Calibration (T3430) screen and save the settings by touching the green check mark button in the bottom right corner of the display.

• If the patient positioning lights are not already on, touch either of the target position arrows on the control panel main display to switch them on. The main display is the display that is shown when the X-ray unit is switched on.
• The beam of the midsagittal plane light has to coincide with the y-line on the ball phantom (see figure below). To accomplish this, carefully adjust the position of the midsagittal plane light by using a pair of pliers of a similar tool.

• Attach the Frankfort Plane alignment tool to the ball phantom as shown below. The Frankfort Plane alignment tool is marked with two horizontal reference lines.
• If the patient positioning lights are not already on, touch either of the target position arrows on the control panel main display screen to switch them on. The main display is the display that is shown when the X-ray unit is switched on.
• The Frankfort Plane light beam must be horizontal and reach the rear end of the Frankfort Plane alignment tool. Using the Frankfort Plane light adjusting lever, check that the movement range of the light beam covers at least the area between the two reference lines on the alignment tool.
• To adjust the position of the light beam, first open the column front panel. Then, carefully adjust the position of the light by using a pair of pliers or a similar tool.
• Adjust the position of the light until the light beam meets the criteria described above. Check the beam position also with the front panel closed.

After completing the ProOne Positioning Laser adjustments, you'll need to calibrate the ProOne sensor. As these lasers determine the positioning of the x-ray, they will not line up with the old calibration files.

For assistance in calibrating the ProOne sensor, see ProOne Calibration .