Al-Dulamey Q. Using Thermopile as Densitometer for Measurement Optical Density for X-Ray Radiation Film Which Used in Dental Medicine. Al-Rafidain Dent J [Internet]. 2009 Sep. 1 [cited 2026 Jan. 12];9(2):297-302. Available from: https://rden.uomosul.edu.iq/index.php/rden/article/view/35103