Acteon X-MIND prime 3D ceph - Page 281

Service Manual – Corrective maintenance
SERVICE MANUAL • X-MIND prime 3D • (19) • 11/2019 • NXMPEN080A
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7. Verify that the that the dot and ring projections are centred to the
primary collimator beam
Adjustments
If the ring-dot are not centred to the primary X-ray beam perform the following
procedures:
1. Verify if the numerical values of the “W6-Ceph window” collimator offsets
“HO, HV,VO,VW” stored in the unit EEPROM memory (see paragraph 8.4) are
the same ones reported by the equipment parameters table (supplied as
paper copy with the unit documentation – see paragraph 14.1). If they are
not the same correct them.
2. Verify if the numerical value of the “Rotation ceph offset” stored in the unit
EEPROM memory (see paragraph 8.4) is the same one reported by the
equipment parameters table (supplied as paper copy with the unit
documentation – see paragraph 14.1). If it’s not the same correct it.
Warning
Before proceeding with following points perform the panoramic primary
collimator alignment checks requested by paragraph 14.1).
3. If an adjustment of the Rotation ceph offset is required modify its values
according to the following convention:
OFFSET
Effect on position of x-ray beam
Rotation ceph [+]*
Move the X-ray beam on the
RIGHT of the ear rods/ image
Rotation ceph [-]*
Move the X-ray beam on the LEFT
of the ear rods/ image
*Note: The symbols [+] and [-] mean, respectively, an increase and a decrease of
the offset value.
Offset Conversion
1 offset ≃ 37pixel (3.7mm) measured on the image (Resolution:High)
Furthers checks after the adjustment
If the offset has been modified perform all the checks of the following paragraphs
following the numeric sequence.