X-Ray Positioners & Aiming Devices
18 products
About positioners and aiming devices
X-ray positioners and aiming devices are usually sets: a receptor-holding portion plus a right-angle beam aiming rod, with or without an aiming ring. A ring with notches is what brings a rectangular collimator square to the receptor, with the cone perpendicular to the plate. Aiming rods are made at a right angle for the standard projection, and adjustable rods set to 20 or 40 degrees exist for shifting the tube horizontally.
The arm and ring that aim the beam, which is what makes the paralleling technique repeatable. In one comparison an angulation-adjustable holder produced no cone-cutting error in the horizontal tube-shift technique and cut the time spent aligning the cone, where a fixed right-angle paralleling holder did not.
Sources: Efficacy of a newly designed angulation-adjustable film holder for reducing cone-cutting errors in the horizontal tube-shift technique, 2022 (PMC9668518) · Impact of Rectangular Collimation on Quality of Intraoral Radiographs: Findings from a Clinical Audit at a Dental Practice, 2025 (PMC11988990)