NABASU, Seth Ezra et al. The Effect of the Film-to-Focus Distance (FFD) Method on the Optical Density of the Organs and Anatomical Interest Parts in the Thoracic Cage. Nigerian Journal of Physics, [S. l.], v. 34, n. 3, p. 154–161, 2025. DOI: 10.62292/. Disponível em: https://njp.nipngr.org/index.php/njp/article/view/438. Acesso em: 28 sep. 2025.