Establishing regional dosimetry protocol for panoramic radiography

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To establish regional diagnostic reference levels in panoramic radiography and to promote optimization of radiation protection for patients, dose-width products DWPs should be widely surveyed. For measurement of the DWPs in panoramic radiography we improved optically stimulated luminescence(OSL) dosimeters for CT. Using the improved OSL dosimeter, we measured the DWP, and at the same time the beam height H using X-ray films. A dose-area product DAP was calculated from the product of DWP and H. We evaluated the accuracy of the DWP and DAP values comparing with calibrated ionization chamber measurement, and concluded the validity of the new regional dosimetry protocol for panoramic radiography.