Hologic Faxitron CT, Руководство пользователя

Страница: 69 / 79

FAXITRON CT USER MANUAL | HOLOGIC | REVISION 002
SECTION
Schedule of
Maintenance
8
8-5
ACR Phantom (Wax Insert Only)
Note: Other test phantoms can be used. Contact Faxitron / Hologic for guidance.
Record results under “ACR Phantom Test” on the Periodic Maintenance Record, located at the
end of the Section, or on an approved form.
The user should be familiar with using the Faxitron CT and should know the procedures of
taking X-Rays. Go through the setup procedures and make sure that the system is fully
calibrated - Image, Geometric and Uniformity.
Wax insert needs to be taken out of its acrylic holder. Using tape or a small slit in the single use
foam tray place the ACR phantom standing on its side facing the X-Ray source. Take a 2D
image of the wax insert portion of mini ACR Phantom shown in Figure 8.8.1.
The Mini ACR Phantom contains 12 objects: 4 masses, 4 fibers, and 4 groups of calcifications
(specks). Each calcification group contains 6 individual calcifications or specks.
At minimum the brightest 3 out for 4 masses, fibres, and calcifications must be visible in 2D
mode.
8.8.0
ACR Phantom
Test
Figure 8.8.1
Typical X-ray image of mini
ACR Phantom (wax insert
only)