8-7
Distance Measurement Test
To ensure measurement
accuracy, this procedure
verifies that the Distance tool
is functioning properly.
24. Right click view and
select Distance.
25. Drag the Distance cursor
to draw a line from the
outside line of set 18 to
the outside line of set 12,
as shown.
26. The measurement
(displayed in upper corner
of image) should be
between 38 and 39 mm.
27. Call Technical Support, if
the measured value is not
within this range.
Hounsfield Unit (HU) Measurements
This procedure checks density consistency in various
measurements. The positioning and dimension of each Region of
Interest (ROI) is very important. Be consistent between each
assessment to achieve the minimum deviation.
28. Perform a second scan (described in steps 5 - 16) using the
following settings:
On Patient Information panel:
Enter QA Test in the First Name field and Hounsfield in the
Patient ID field.
On the Volume tab:
Size of Reconstruction Volume: Dia 8.5 - H 8.5 cm
Resolution: .4 voxel
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