KaVo 3D eXam, Руководство оператора

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k990400 September 19, 2007
Acquisitioning (Scanning)
6-11
PAN Scan (Optional)
A PAN scan is a scan mode that creates a Panoramic exposure that
is a two dimensional image.
Patient positioning is critical for PAN scans. The Gantry must also
be properly aligned to ensure quality Patient images. Prior to
performing a PAN scan, the Gantry alignment should be checked, to
ensure optimal system performance. It is recommended to check the
Gantry alignment monthly or if the image quality has degraded.
To check Gantry alignment:
1. Replace the Chin Cup with
the Chair Center Locator.
2. Press the Alignment Light
button on the Gantry Front
Panel to display lasers.
Lasers are available while
the Volume tab is selected
(not PAN).
3. Ensure that the Vertical
Laser intersects the notch
on the Chair Center Locator tool, as shown.
4. If the Vertical Laser is in the correct
position, then the unit is ready to
perform a PAN scan.
If the Vertical Laser is out of position,
then adjust the chair foot, using a 1/4
inch nut driver.
•
Turn nut driver clockwise -
moves alignment tool towards
rear of Gantry.
•
Turn nut driver counter-
clockwise -
moves alignment tool
towards front of Gantry.
To acquire a PAN scan:
1. Seat the Patient in the chair with an Erect posture.
The neck must be straight as possible to avoid the spine getting
in the view.
Vert
ical
La
ser