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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Regional pulmonary function after irradiation of the canine lung: radionuclide evaluation.

The pulmonary effects of neutron and gamma irradiation were compared in a group of beagle dogs that were subjected to hemithorax irradiation with cobalt-60 gamma rays or 15-MeV neutrons. Integral cobalt-60 doses of 3000, 4500, or 6750 rad (30, 45, or 67.5 Gy) and neutron doses of 1000, 1500, or 2250 rad (10, 15, or 22.5 Gy) were given on a therapy-type schedule of four equal fractions per week for 6 weeks. Serial Tc-99m-macroaggregated albumin perfusion, Tc-99m-Sn-phytate aerosol, and xenon-133 ventilation studies were performed before irradiation and at 3, 6, 9, 12, 18, and 24 months postexposure. Pulmonary damage was more severe and persistent with neutron than with gamma radiation, but the changes were dose-dependent for both types of radiation. The perfusion and radioaerosol imaging studies provided the best scintigraphic evidence of lung damage. Abnormalities in the xenon-133 studies were relatively minor and were more apparent on the single-breath than on the equilibrium or clearance studies. The scintigraphic studies provided evidence of radiation-induced ventilation perfusion inequalities with both types of radiation, but required several times less neutron radiation than gamma radiation to produce similar alterations in ventilation-perfusion relationships.[1]


  1. Regional pulmonary function after irradiation of the canine lung: radionuclide evaluation. Vieras, F., Bradley, E.W., Alderson, P.O., Jacobus, J.P., Grissom, M.P. Radiology. (1983) [Pubmed]
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