Pilot or scout films, relate CT slice position to anteriorposterior (AP) and lateral radiographic views of the patient at the time of scanning.
They are obtained by keeping the X-ray source in a fixed position and moving the patient (translational motion) through the stationary slit beam. The result is a high defininition radiograph that is divergent on the transverse axis but non-divergent on the longitudinal axis.
Target position relative to the bony anatomy on the simulator radiographs may then be determined through comparison with the CT scout or pilot films, keeping in mind the different magnifications between the simulator and scout films.
No comments:
Post a Comment