planned anthropogenic radiation exposure internal radiation exposure internal experimental radiation exposure Planned exposure of an entity to radiation of any type, for example as part of a medical or experimental procedure with the intention of exposing the entity to radiation energy internally by the ingestion, inhalation or implantation of a source of radiation. Research subjects participating in a clinical trial using an internally implanted radiation source have an internal experimental radiation exposure https://orcid.org/0000-0002-5111-7263