Using Thermopile as Densitometer for Measurement Optical Density for X-Ray Radiation Film Which Used in Dental Medicine

Aims: To encountered in using thermopile device (thermocouple) as densitometer for measuring opticaldensity for Xradiation film which is used in dental medicine. Materials and methods: Americium241(Am241) 59.5keV was used to expose a number of dental Xray films for different times toend with a variety of optical densities on them. Results: A comparison of the optical density readingsbetween the densitometer and thermopile was made. Conclusions: The thermopile was capable tomeasure the optical density of any transparent polymer material while the densitometer can measurethe optical density of the Xray film only.