AN ALIGNMENT DEVICE FOR DENTAL CONE BEAM COMPUTED TOMOGRAPHY

摘要

A practical external alignment device to optimize the positioning of a patient, and assist in the selection of the most appropriate size of the scanned field of view (FOV) in dental Cone Beam Computed Tomography (CBCT). The device may be used to optimize the patient exposure, and to train the radiographer. This device is fitted in the patient's mouth during scout and CBCT exposures. The device incorporates targets (4), (6), and markings (5), (7), for guiding the positioning of the patient, by alignment with the scanner laser line indicators. With the device in position, markings (9) represent the extent of the FOV and the axis of the FOV.