El Khatib, Ahmed. M., Mohamed. S. Badawi, Mohamed. A. Elzaher, Mona. M. Gouda, Abouzeid. A. Thabet, Mahmoud. I. Abbas, and Kholud. S. Almugren. 2017. “Empirical Formulae for Calculating γ-Ray Detectors Effective Solid Angle Ratio”. Journal of Radiology and Oncology 1 (1):012-021. https://doi.org/10.29328/journal.jro.1001002.