990400 Rev C 2010 May 1
Acquisitioning (Scanning)
7-3
5. Select a Resolution from the drop-down list box.
In general, the lower the voxel size and the longer the scan time,
the better the resolution and detail; however, a smaller voxel size
and longer scan time creates a larger data set so the
reconstruction time is longer. Also, these protocols are more
sensitive to Patient movement, so it is critical to restrict Patient
movement during the scan. Longer scan times also delivers a
higher radiation dose.
Standard scans should be taken at Full 13cm, 8.9 seconds, 0.4
Voxel. This captures the entire maxillofacial region from above
the condyles down to below the lower jaw, at the most practical
scan time (reducing chance of movement), at a reduced radiation
dose, with a voxel size that maximizes detail without the dataset
being too large.
It is recommended to use a faster scan time (for example, 5
seconds.) for children, some elderly Patients (if movement is a
significant issue), or if you require only a quick PAN or TMJ
Scan, or a secondary/follow-up scan (e.g. Open Jaw TMJ views,
TMJ views with appliance/splint, etc.). Since it is a faster scan
time, the radiation dose is the lowest, and the opportunity for
Patient movement is less.
6. If desired, select the Quantum IQ checkbox to apply this
reconstruction type when the image is processed. See Quantum
IQ
for more information on Quantum IQ.
7. Once the settings are made, you may perform a Preview, Dry
Run, and Capture scan.
Preview, Dry Run, and Capture Scans
After the acquisition is launched and the protocol is selected, a
Preview of the Patient is recommended to verify Patient positioning.
The X-ray device may be dangerous to the Patient and operator if
you do not observe and follow the operating instructions. Do not
operate this system unless you have received training to perform a
procedure.
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