6-23. PREVENTIVE MAINTENANCE
The cut thickness test should be performed:
a. At six-month intervals.
b. After any service work on the tomographic drive mechanism.
c. When you need to know the thickness of the tomographic cut.
6-24. CORRECTIVE MAINTENANCE
a. Call the equipment manufacturer.
b. Discuss questions about the thickness of the cut plane with the equipment
Section V. FLATNESS OF PLANE
This test determines the flatness of the tomographic plane.
a. One 45 degree tomographic wedge with a centimeter scale.
b. Plexiglas attenuator blocks, 3/4 inch.
c. One 14- x 17-inch cassette.
d. Recording data forms.
a. Prepare the equipment to be tested.
b. Place the 14- x 17-inch cassette lengthwise in the Bucky tray (see figure 6-
c. Place the x-ray beam perpendicular to the tabletop and adjust the
beam restriction system to provide a 14- x 17-inch radiation field (see figure 6-11).
d. Position the 45 degree test wedge in the center (approximately) of the upper
left quadrant of the light field with 12 cm point of scale (see figure 6-12.