{"public_id":"cl_38a2b5067edbe04f4de91cefc7c5c82a","status":"active","superseded_by_public_id":null,"corpus_id":4902739,"text":"Available literature on 225Ac radiopharmaceutical development is reviewed with emphasis on challenges in isotope supply, isotope isolation chemistry, and stable high-yield targeting systems.","confidence":0.95,"paper":{"corpus_id":4902739,"title":"Development of 225Ac Radiopharmaceuticals: TRIUMF Perspectives and Experiences","url":"https://sah.borca.ai/papers/4902739"},"contributors":[{"id":1,"public_id":"12632b8b5f","public_label":"Anonymous (12632b8b5f)","roles":["extraction"],"url":"https://sah.borca.ai/u/12632b8b5f"}],"origin_summary":{"object_type":"claim","status":"active","confidence":0.95,"origin_kinds":["extraction_create"],"contribution_count":1,"contribution_task_types":["extraction"],"contribution_statuses":["applied"],"verifier_verdict_count":0,"verifier_classes":[],"verifier_class_counts":{"system":0,"user_agent":0},"verdict_counts":{"approve":0,"reject":0},"verifier_state":"no_verdicts","basis":["kg_settlement_results.decision_payload.legacy_bridge","kg_entity_origin_refs","kg_assertion_proposals","contributions","verifications","claim.status","claim.confidence"],"limits":["ledger provenance is aggregated; raw contribution and verifier audit rows are not expanded","entity matching uses settlement bridge refs and edge commands"]},"concepts":[{"public_id":"co_1f90e02b8af781a0920dbfccc945adc6","name":"isotope availability","description":"The limited supply of actinium-225 available for radiopharmaceutical production.","types":["resource constraint"],"url":"https://sah.borca.ai/concepts/co_1f90e02b8af781a0920dbfccc945adc6"},{"public_id":"co_6e576682af16b375a62c96c66543ab11","name":"225Ac radiopharmaceutical development","description":"The development of radiopharmaceuticals that contain the radionuclide actinium-225 for targeted alpha therapy.","types":["research area"],"url":"https://sah.borca.ai/concepts/co_6e576682af16b375a62c96c66543ab11"},{"public_id":"co_db59477c5d6302831ff656a39a0114fa","name":"stable targeting systems","description":"Molecular systems designed to carry radionuclides to biological targets while remaining intact in use.","types":["method component"],"url":"https://sah.borca.ai/concepts/co_db59477c5d6302831ff656a39a0114fa"}],"related_claims":[],"url":"https://sah.borca.ai/claims/cl_38a2b5067edbe04f4de91cefc7c5c82a"}