Investigation of barium sulphate shielding during panoramic radiography oleh Omemh Bawazeer, Alaa Fallatah, Mohamed Alasmary, Younis Bokhary, Areej Almerabi, Suha Khan, Nouf Abuhadi, Amani Alalawi, Naseem Asiri, Saeed Bawazir, Saeed Al-Qahtani, Merfat Algethami, Mohamed Badawy