A Video Feedback Repositioning Method For Standardized Dental Radiographs

A realtime video feedback method has been developed to permit repositioning a patient for standardization of image geometry for intraoral radiography. The methods utilizes a stored image of the face taken at the time of the first radiograph. Prior to exposure of a second radiograph the subject views a realtime subtraction image of the stored reference image and the current position of the face. The subject is aligned when the monitor has a neutral gray appearance. Validation studies indicate that this method can be used in anterior teeth with a mean angular descrepancy of 0.3 1 degrees. When these radiographs are used to produce subtraction images lesions may be detected with 93% sensitivity.