{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:XSLXJN6PB74S6OYY42FFHDFFAT","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":"28cb4b4d130606de57151a45ac0db9bcec20c8342e9df8312de21a94e7725d15","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-11-29T18:24:18Z","title_canon_sha256":"f24b37a5a13e4a34d95eee86c0f2aae069f0e5c212e6ce8ba9a6f35b2b35a9b3"},"schema_version":"1.0","source":{"id":"1711.11002","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1711.11002","created_at":"2026-05-17T23:49:53Z"},{"alias_kind":"arxiv_version","alias_value":"1711.11002v1","created_at":"2026-05-17T23:49:53Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1711.11002","created_at":"2026-05-17T23:49:53Z"},{"alias_kind":"pith_short_12","alias_value":"XSLXJN6PB74S","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_16","alias_value":"XSLXJN6PB74S6OYY","created_at":"2026-05-18T12:31:56Z"},{"alias_kind":"pith_short_8","alias_value":"XSLXJN6P","created_at":"2026-05-18T12:31:56Z"}],"graph_snapshots":[{"event_id":"sha256:71ece351bcda0ddd5cd156865fc39d60dfa278e29fd11d0135efbbdb0a567819","target":"graph","created_at":"2026-05-17T23:49:53Z","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":"In the present paper a general setup for determination of imperfect geometry of radiotherapeutic devices has been proposed that base on geometric algebra framework. To account for this imperfect geometry, two methods of a calibration were presented, consisting of determining for each angular position of a gantry a correction shift which must be applied to the origin of a laboratory frame of reference to place it along a radiation axis for this angular position. Closed form solutions for these corrections are provided.","authors_text":"A. Woszczyna, D. Kabat, M. Tulik, R. A. Kycia, Z. Lata{\\l}a, Z. Tabor","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-11-29T18:24:18Z","title":"A framework for assumption-free assessment of imperfect geometry of a linac C-arms"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1711.11002","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":"sha256:081253dfabb5149b25bba520e65beae4f87ffa94955ec3d896fc054100af74ef","target":"record","created_at":"2026-05-17T23:49:53Z","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":"28cb4b4d130606de57151a45ac0db9bcec20c8342e9df8312de21a94e7725d15","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-11-29T18:24:18Z","title_canon_sha256":"f24b37a5a13e4a34d95eee86c0f2aae069f0e5c212e6ce8ba9a6f35b2b35a9b3"},"schema_version":"1.0","source":{"id":"1711.11002","kind":"arxiv","version":1}},"canonical_sha256":"bc9774b7cf0ff92f3b18e68a538ca504c0c3b3016e593a382509e523bf3dac44","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bc9774b7cf0ff92f3b18e68a538ca504c0c3b3016e593a382509e523bf3dac44","first_computed_at":"2026-05-17T23:49:53.082981Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:49:53.082981Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"thf2QsTDXe5X/U/b76W+8eznagnsQF+9+ICdedgT9E8d+XNnE2V32ruMHqO1o/uAk1QjwhRRf1J8Wyx2T6M+BA==","signature_status":"signed_v1","signed_at":"2026-05-17T23:49:53.083733Z","signed_message":"canonical_sha256_bytes"},"source_id":"1711.11002","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:081253dfabb5149b25bba520e65beae4f87ffa94955ec3d896fc054100af74ef","sha256:71ece351bcda0ddd5cd156865fc39d60dfa278e29fd11d0135efbbdb0a567819"],"state_sha256":"b71161c19accebe43cca083a142636781f20b318bfc50c54d1c4cdefafde1d40"}