c. Masking tape. (Do not use white hospital tape because it can leave a residue
that causes an artifact in the fluoroscopic image.)
d. Measuring tape.
e. Recording form.
a. Adjust the system to the minimum distance obtainable.
b. Next, place the 3-inch metal object on the table (see figure 5-2).
Figure 5-2. Place three-inch metal object on table.
c. Tape the 6-inch object to the anterior-most (front) surface of the fluoroscopic
d. Put on your lead apron (see figure 5-3).
e. Use the fluoroscopy and observe the image. Keep adjusting the distance
between the tabletop and the radiation source until the two metal objects are seen to be
exactly the same size on the viewing screen (see figure 5-4).
f. Lock the assembly in place.