disease incidence/prevalence measurement lung measurement percentage of study population developing radiation pneumonitis during a period of time 2021-05-21T18:03:28Z CMO:0003722 PMID:30575429 The total number of subjects within a study population which develop radiation pneumonitis during a specified period of time divided by the total number of individuals in the study population, expressed as a percentage. Radiation pneumonitis is inflammation of the lung due to harmful effects of ionizing or non-ionizing radiation. VT:0002327 clinical_measurement_ontology incidence of radiation pneumonitis slaulede