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2.
Acquire a CBCT scan of the phantom using a
Medium Field (120 kVp) scan option.
Advice: Please refer to the Acquiring a Scan section of the manual, Chapter 6,
for Acquiring the scan).
3.
Evaluate High Contrast Spatial Resolution:
Open the newly captured scan in
CubeVue Viewing software and load the acquired scan to visually evaluate the line
pairs for high contrast spatial resolution.
Advice: Please refer to Chapter 6 for instructions on use of CubeVue.
a. Apply the Sharp Filter from within CubeVue – keep this set for all of the
remaining QA procedures.
b. Change the slab thickness to the smallest thickness in the axial window – keep
this set for all of the remaining QA procedures.
c. Observe the line pairs in the CubeVue Review/MPR Tab’s axial view. (Refer to
Chapter 6 for instructions on use of CubeVue). The axial image should be
centered on the line pairs, use coronal and sagittal views to approximate the
center of the line pairs (height), then view the line pairs in the axial window.
d. The expected result should be 9 line pairs per cm or better. The line pairs start
at 8 line pairs, so the second set of line pairs is 9 line pairs per cm, third set is 10
line pairs per cm, and so forth.
e.
Visually verify that there is definition present for each of the lines in pair 9 or
higher.
4. Evaluate Hounsfield (HU) Accuracy:
a.
On the axial view, measure the Hounsfield Units value of each density chamber.
The results should fall within the below ranges.
Advice: K
eep the HU circle off the borders of the chambers and use the
small circles under the HU menu in CubeVue. Move the HU regions so that the
first one on the list in CubeVue in the top right corner is the Air region, the
second is Acrylic and continue around the circle. This then allows for the
CubeVue top right HU Values to line up with the HU value order of the list below.
WARNING
The X-ray device may be dangerous to the
Patient and Operator if you do not observe and follow operating
instructions. Do not operate this system unless you have
received training to perform a procedure
Summary of Contents for pedCAT
Page 37: ...36 0473 90001 Rev 07 26 13 Tube Head Label Beam Limiter Label X Ray Power Supply label ...
Page 40: ...39 0473 90001 Rev 07 26 13 Laser Lights Button ...
Page 93: ...92 0473 90001 Rev 07 26 13 Beam Path and Angulation ...
Page 97: ...96 0473 90001 Rev 07 26 13 ...
Page 144: ...143 0473 90001 Rev 07 26 13 ...
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