BAIs with aiming rings dictate the proper PID angulation.Angulation can be changed by moving the PID in either a horizontal or vertical direction.Angulation is a term used to describe the alignment of the central ray of the x-ray beam in the horizontal and vertical planes.In the bisecting technique, the angulation of the PID is critical.Rinn Eezee-Grip Film Holder (Snap-A-Ray).The following are types of commercial film holders that are available:.This practice exposes the patient’s hand and finger to unnecessary radiation.
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