{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:YTHLEXJN2AUFNMH72COKVSQR5X","short_pith_number":"pith:YTHLEXJN","canonical_record":{"source":{"id":"2607.27741","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2026-07-30T06:28:31Z","cross_cats_sorted":["cs.CV","physics.comp-ph"],"title_canon_sha256":"309a96e5c60ce0ce5332fa7c5cb5982416e28fe3608fbd2261521ecf1f13f742","abstract_canon_sha256":"60522384dc3823fcf23e608e7f6e3b11819937a63efe19786fe141ca7bf7d3e0"},"schema_version":"1.0"},"canonical_sha256":"c4ceb25d2dd02856b0ffd09caaca11edfe0f1424a53ac13f09138355e3107c5c","source":{"kind":"arxiv","id":"2607.27741","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.27741","created_at":"2026-07-31T01:30:11Z"},{"alias_kind":"arxiv_version","alias_value":"2607.27741v1","created_at":"2026-07-31T01:30:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.27741","created_at":"2026-07-31T01:30:11Z"},{"alias_kind":"pith_short_12","alias_value":"YTHLEXJN2AUF","created_at":"2026-07-31T01:30:11Z"},{"alias_kind":"pith_short_16","alias_value":"YTHLEXJN2AUFNMH7","created_at":"2026-07-31T01:30:11Z"},{"alias_kind":"pith_short_8","alias_value":"YTHLEXJN","created_at":"2026-07-31T01:30:11Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:YTHLEXJN2AUFNMH72COKVSQR5X","target":"record","payload":{"canonical_record":{"source":{"id":"2607.27741","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2026-07-30T06:28:31Z","cross_cats_sorted":["cs.CV","physics.comp-ph"],"title_canon_sha256":"309a96e5c60ce0ce5332fa7c5cb5982416e28fe3608fbd2261521ecf1f13f742","abstract_canon_sha256":"60522384dc3823fcf23e608e7f6e3b11819937a63efe19786fe141ca7bf7d3e0"},"schema_version":"1.0"},"canonical_sha256":"c4ceb25d2dd02856b0ffd09caaca11edfe0f1424a53ac13f09138355e3107c5c","receipt":{"kind":"pith_receipt","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"c4ceb25d2dd02856b0ffd09caaca11edfe0f1424a53ac13f09138355e3107c5c","last_reissued_at":"2026-07-31T01:30:11.851423Z","signature_status":"unsigned_v0","first_computed_at":"2026-07-31T01:30:11.851423Z"},"source_kind":"arxiv","source_id":"2607.27741","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-31T01:30:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZCrvPExPajZbh3EW8H2Wl79WTorjd/cpdoA9NpmzFQyJOeVfzN7jeAKOyh4FBjQWh0FMM0BWZMdWPWjHuaPpDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T02:15:34.214031Z"},"content_sha256":"b7d7dcf05fec452c32cbaf6592f2f23bc2666aee1538f1e2ef5f2def4cdb6a05","schema_version":"1.0","event_id":"sha256:b7d7dcf05fec452c32cbaf6592f2f23bc2666aee1538f1e2ef5f2def4cdb6a05"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:YTHLEXJN2AUFNMH72COKVSQR5X","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Three-Photon Bayesian Imaging of Ortho-Positronium","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["cs.CV","physics.comp-ph"],"primary_cat":"physics.med-ph","authors_text":"A. Coussat, B.C. Hiesmayr, K. Klimaszewski, L. Raczynski, M. Bala, M. Obara, R. Y. Shopa, W. Krzemien","submitted_at":"2026-07-30T06:28:31Z","abstract_excerpt":"PET provides functional images relying on two-photon coincidences from positron-electron annihilation. In human tissue, about 40\\% of annihilations are preceded by Ps formation, of which o-Ps component partially decays into three photons, with the remainder annihilating via pick-off or spin-exchange into two photons. This three-photon channel carries additional information about the surrounding micro-environment, including the three-to-two-photon yield ratio as a potential diagnostic marker. We propose the TRIO algorithm, a novel three-photon event-by-event image reconstruction algorithm formu"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.27741","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.27741/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-31T01:30:11Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"L2gkgnQHFm1OrVLePcca8Tl3Pw+cACjt/a6P5R0qKR5kmJXPkLQNpePnw8SPzxIcQwZM63F+k6Z+ECzqRYMADA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-11T02:15:34.214595Z"},"content_sha256":"b7c3d61e91d8a3578d4475592d6c05115910db1b0db0892a4d12bd90b945494c","schema_version":"1.0","event_id":"sha256:b7c3d61e91d8a3578d4475592d6c05115910db1b0db0892a4d12bd90b945494c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/YTHLEXJN2AUFNMH72COKVSQR5X/bundle.json","state_url":"https://pith.science/pith/YTHLEXJN2AUFNMH72COKVSQR5X/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/YTHLEXJN2AUFNMH72COKVSQR5X/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-08-11T02:15:34Z","links":{"resolver":"https://pith.science/pith/YTHLEXJN2AUFNMH72COKVSQR5X","bundle":"https://pith.science/pith/YTHLEXJN2AUFNMH72COKVSQR5X/bundle.json","state":"https://pith.science/pith/YTHLEXJN2AUFNMH72COKVSQR5X/state.json","well_known_bundle":"https://pith.science/.well-known/pith/YTHLEXJN2AUFNMH72COKVSQR5X/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:YTHLEXJN2AUFNMH72COKVSQR5X","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":"60522384dc3823fcf23e608e7f6e3b11819937a63efe19786fe141ca7bf7d3e0","cross_cats_sorted":["cs.CV","physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2026-07-30T06:28:31Z","title_canon_sha256":"309a96e5c60ce0ce5332fa7c5cb5982416e28fe3608fbd2261521ecf1f13f742"},"schema_version":"1.0","source":{"id":"2607.27741","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.27741","created_at":"2026-07-31T01:30:11Z"},{"alias_kind":"arxiv_version","alias_value":"2607.27741v1","created_at":"2026-07-31T01:30:11Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.27741","created_at":"2026-07-31T01:30:11Z"},{"alias_kind":"pith_short_12","alias_value":"YTHLEXJN2AUF","created_at":"2026-07-31T01:30:11Z"},{"alias_kind":"pith_short_16","alias_value":"YTHLEXJN2AUFNMH7","created_at":"2026-07-31T01:30:11Z"},{"alias_kind":"pith_short_8","alias_value":"YTHLEXJN","created_at":"2026-07-31T01:30:11Z"}],"graph_snapshots":[{"event_id":"sha256:b7c3d61e91d8a3578d4475592d6c05115910db1b0db0892a4d12bd90b945494c","target":"graph","created_at":"2026-07-31T01:30:11Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2607.27741/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"PET provides functional images relying on two-photon coincidences from positron-electron annihilation. In human tissue, about 40\\% of annihilations are preceded by Ps formation, of which o-Ps component partially decays into three photons, with the remainder annihilating via pick-off or spin-exchange into two photons. This three-photon channel carries additional information about the surrounding micro-environment, including the three-to-two-photon yield ratio as a potential diagnostic marker. We propose the TRIO algorithm, a novel three-photon event-by-event image reconstruction algorithm formu","authors_text":"A. Coussat, B.C. Hiesmayr, K. Klimaszewski, L. Raczynski, M. Bala, M. Obara, R. Y. Shopa, W. Krzemien","cross_cats":["cs.CV","physics.comp-ph"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2026-07-30T06:28:31Z","title":"Three-Photon Bayesian Imaging of Ortho-Positronium"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.27741","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:b7d7dcf05fec452c32cbaf6592f2f23bc2666aee1538f1e2ef5f2def4cdb6a05","target":"record","created_at":"2026-07-31T01:30:11Z","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":"60522384dc3823fcf23e608e7f6e3b11819937a63efe19786fe141ca7bf7d3e0","cross_cats_sorted":["cs.CV","physics.comp-ph"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2026-07-30T06:28:31Z","title_canon_sha256":"309a96e5c60ce0ce5332fa7c5cb5982416e28fe3608fbd2261521ecf1f13f742"},"schema_version":"1.0","source":{"id":"2607.27741","kind":"arxiv","version":1}},"canonical_sha256":"c4ceb25d2dd02856b0ffd09caaca11edfe0f1424a53ac13f09138355e3107c5c","receipt":{"builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"c4ceb25d2dd02856b0ffd09caaca11edfe0f1424a53ac13f09138355e3107c5c","first_computed_at":"2026-07-31T01:30:11.851423Z","kind":"pith_receipt","last_reissued_at":"2026-07-31T01:30:11.851423Z","receipt_version":"0.3","signature_status":"unsigned_v0"},"source_id":"2607.27741","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b7d7dcf05fec452c32cbaf6592f2f23bc2666aee1538f1e2ef5f2def4cdb6a05","sha256:b7c3d61e91d8a3578d4475592d6c05115910db1b0db0892a4d12bd90b945494c"],"state_sha256":"c6fe104505b6c70e50274569a4c6bf63d994d223fd27ad2814087b9fac7f093d"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"cEJ4M1LgeOmC3cJ+VnCaP3hJayjzcPxDBikagQNcMZGGhXCnQ8OmnufHH0Tnok/gGi+kjXOcQTDRXoiAhWbkAw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-11T02:15:34.219038Z","bundle_sha256":"c4bdaf2e6d7633788a66ad8f0d278bd2b754ca86e69394682adf1a66acbc6aef"}}