title: Monte Carlo calculations of the response of an external detector to a photon source in the lungs of a heterogeneous phantom.
mesh_terms: D008671:Actinoid Series Elements; D003201:Computers; D006801:Humans; D008168:Lung / Q000528:radiation effects*; D008954:Models, Biological; D008961:Models, Structural; D009010:Monte Carlo Method; D011829:Radiation Dosage; D011834:Radiation Monitoring; D014965:X-Rays
chemical_list: D008671:Actinoid Series Elements