{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"4c356d42908b32cd6d0fc28034797a7baa2c5699686f819c3a9a5fb85744137c","created":"2026-10-03T07:17:52Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"5e757096fc207ecf8b4546d9dd1c5da5968fc9336f81b35f7bfd99ceb6acadd2","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"med.dosimetry","field":"med","n":"1","review_cite":"Das, Ding and Ahnesjo, Small fields: nonequilibrium radiation dosimetry, Medical Physics, 2008","review_link":"https://doi.org/10.1118/1.2815356","review_verified":"true","summary":"Knowing the dose a patient receives rests on calibrating detectors in standard conditions. Modern beams are small, pulsed extremely hard, or operate inside strong magnets, and the standard calibration chain breaks down there.","title":"Reference dosimetry in nonstandard beams","topic_ref":null,"why":"A systematic dose error of a few percent changes tumour control and complication rates, and several accidents have come from exactly this failure."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"be2989252171f9f987d92f4b562e96075370f97879f879218827602913f7731c","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"5bd0122bef2acf20402acaded6936d50fd953669395b988f03b5d49626d4898f","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"zCBhBY0J0TAzv5LurEx40zp-wc5FOlgclan9z_RHNkBESmPzTe0j3J6rOBcu0NOIVfrDGklKmDKuZrWHa8bgBg"},"schema":"pubphys.envelope/1"},"record_hash":"be2989252171f9f987d92f4b562e96075370f97879f879218827602913f7731c","leaf_index":270}