e. Collimate the x-ray beam to the 60 kVp region.
f. Set the source to image detector distance (SID) to 20 inches.
A 20-inch SID is used ONLY on the 60 kVp region. A 40-inch SID will be
used on the other kVp regions on the cassette.
g. Set the control panel.
Milliampere (mA) at which kVp values are being checked.
Milliampere will NOT be changed for each exposure. Take all exposures
with the same mA.
60 kVp and time with mA to produce 150 mAs.
h. Make the exposure.
i. Collimate the x-ray beam to the 80 kVp region (see figure 4-3).
Figure 4-3. Testing 80 kVp region.