a. Motorized synchronous top (mAs-timer test tool).
b. Lead blockers.
c. Timer protractor.
d. Extension cord.
e. A 10- by 12-inch cassette.
f. Lead numbers.
a. Plug the timing tool into 110 volt outlet.
If needed, use an extension cord to ensure that the test tool can be easily
placed on the x-ray table.
b. Place the cassette on the x-ray table.
c. Place a lead blocker over three-fourths of the cassette, leaving one-fourth
exposed. Four different exposures are made on one cassette.
d. Place the timing tool on the unleaded portion of the cassette.
e. Collimate the x-ray beam to the test tool.
f. Set the SID at 40 inches.
g. Calculate the given mAs.
Use four different times and mA.
(a) 50 mA at 1/5 second (see figure 4-7).
(b) 100 mA at 1/10 second (see figure 4-8).
200 mA at 1/20 second (see figure 4-9).
(d) 300 mA at 1/30 second (see figure 4-10).