Results of the control of the exposure times of dental X-ray

The X-ray gyroscope presented enables the dental radiological personnel to check simply the exposure time of the X-ray unit as to its accuracy. Any load half-wave interval is displayed by a density point on an ORWO XR 5 3/4 x 7 1/2 radiographic film by utilizing the regularity of the emission ratio of one-pulse X-ray generators. A density point corresponds to 0.02 seconds. This method has been used to check and evaluate timers of 10 different X-ray units. The 'Stomax 100' timers showed the least deviations to the exposure time required. (author)