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  • Positioning aids designed to provide an appropriate position for the head during radiography and/or radiotherapy procedures. These devices make possible and/or improve the results of radiographic procedures. These positioning aids typically consist of a stand-alone or wall-mounted bar with a structure at the distal end that includes radiopaque ear rods to be placed in the external auditory canal. The structure can be rotated to provide lateral, frontal, and oblique views of the head; the aids are usually intended for use with specific models of radiographic equipment. Cephalometry positioning aids permit an accurate alignment of the x-ray beam and the patient by using the auditory canal as a reference, thereby improving the accuracy and repeatability of cephalograms and/or other radiographic/radiotherapeutic procedures.
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