{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:FF7NOY5M27KEYHG3EEEO6TUJZK","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"5ce03fa0c5439474c5363b2f50a63d1b6c252c2cea759cc6ff54e64cb5716213","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-09-24T17:35:46Z","title_canon_sha256":"0bdc72236900689040ff4d07d17f4f68c27c810f81f56b62045fab02a314ad0c"},"schema_version":"1.0","source":{"id":"1809.09073","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1809.09073","created_at":"2026-05-18T00:05:01Z"},{"alias_kind":"arxiv_version","alias_value":"1809.09073v1","created_at":"2026-05-18T00:05:01Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1809.09073","created_at":"2026-05-18T00:05:01Z"},{"alias_kind":"pith_short_12","alias_value":"FF7NOY5M27KE","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_16","alias_value":"FF7NOY5M27KEYHG3","created_at":"2026-05-18T12:32:22Z"},{"alias_kind":"pith_short_8","alias_value":"FF7NOY5M","created_at":"2026-05-18T12:32:22Z"}],"graph_snapshots":[{"event_id":"sha256:03bc2b49429eb5e5bf1458f1ab71d4cf0a58620a4783e381402ad25ddda7fe00","target":"graph","created_at":"2026-05-18T00:05:01Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"Purpose: To investigate the validity of two Monte Carlo simulation absolute dosimetry approaches in the case of a small field dedicated `D'-shaped collimator used for the retinoblastoma treatment with external photon beam radiotherapy.\n  Methods: The Monte Carlo code {\\sc penelope} is used to simulate the linac, the dedicated collimator and a water phantom. The absolute doses (in Gy per monitor unit) for the field sizes considered are obtained within the approach of Popescu {\\it et al.} in which the tallied backscattered dose in the monitor chamber is accounted for. The results are compared to","authors_text":"A. Fl\\\"uhs, A. M. Lallena, L. Brualla, P. A. Mayorga, W. Sauerwein","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-09-24T17:35:46Z","title":"Testing Monte Carlo absolute dosimetry formalisms for a small field `D'-shaped collimator used in retinoblastoma external beam radiotherapy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1809.09073","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:c5f2d5b3d4b69ea1a87b7e26455693b3b7efe54ce9997738abfda3815a6600be","target":"record","created_at":"2026-05-18T00:05:01Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"5ce03fa0c5439474c5363b2f50a63d1b6c252c2cea759cc6ff54e64cb5716213","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-09-24T17:35:46Z","title_canon_sha256":"0bdc72236900689040ff4d07d17f4f68c27c810f81f56b62045fab02a314ad0c"},"schema_version":"1.0","source":{"id":"1809.09073","kind":"arxiv","version":1}},"canonical_sha256":"297ed763acd7d44c1cdb2108ef4e89cabf11b7bb28f81c584e5440ad0e59f126","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"297ed763acd7d44c1cdb2108ef4e89cabf11b7bb28f81c584e5440ad0e59f126","first_computed_at":"2026-05-18T00:05:01.194984Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:05:01.194984Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Hp8+bhxIqp0lLTn2A57qNjnu8JNxbfZYFQVuyweW9iuJYJQ9g6IhzptDY1hp7OMLEkEeUgGUDtCIWVnJLCdJDg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:05:01.195593Z","signed_message":"canonical_sha256_bytes"},"source_id":"1809.09073","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c5f2d5b3d4b69ea1a87b7e26455693b3b7efe54ce9997738abfda3815a6600be","sha256:03bc2b49429eb5e5bf1458f1ab71d4cf0a58620a4783e381402ad25ddda7fe00"],"state_sha256":"3d70823912da502727ce0ac98cbee8f86d2238807183629a9b813c3e938c8af3"}