Using the large flashlight, hold the simulated roots in line with each other and project them onto detector (wall). The BB on the apex of one of the roots simulates apical rarefying osteitis (periapical cyst and allow you to differentiate which root is moving with respect to the other).
A. Rotate the flashlight (x-ray source) to the right and to the left. Explain what happens to the objects relative to each other.
a. The object closer to the source moves relative to the other object.
b. The object closer to the detector moves relative to the other object.
c. Relate the movement of the objects relative to the direction of the beam. Observation:
d. Relate the movement of the objects relative to the movement of the source (flashlight, which represents the tube head). Observation: