{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:E4I7KOBJOPCKJFFEJ7K7PV7GE4","short_pith_number":"pith:E4I7KOBJ","canonical_record":{"source":{"id":"1710.11058","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-10-30T16:46:18Z","cross_cats_sorted":["hep-ex","physics.med-ph"],"title_canon_sha256":"4e9b23347af72f791865d98b63f4a9163c0a1438b259937a5314d7b8b58654ae","abstract_canon_sha256":"70f816c3c3c24d557a15fc76a7d711faddcba5043235431c4f1df7a4748a41da"},"schema_version":"1.0"},"canonical_sha256":"2711f5382973c4a494a44fd5f7d7e627071d5287f3bec818d95b31890fb224e3","source":{"kind":"arxiv","id":"1710.11058","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.11058","created_at":"2026-05-18T00:30:40Z"},{"alias_kind":"arxiv_version","alias_value":"1710.11058v1","created_at":"2026-05-18T00:30:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.11058","created_at":"2026-05-18T00:30:40Z"},{"alias_kind":"pith_short_12","alias_value":"E4I7KOBJOPCK","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"E4I7KOBJOPCKJFFE","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"E4I7KOBJ","created_at":"2026-05-18T12:31:12Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:E4I7KOBJOPCKJFFEJ7K7PV7GE4","target":"record","payload":{"canonical_record":{"source":{"id":"1710.11058","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-10-30T16:46:18Z","cross_cats_sorted":["hep-ex","physics.med-ph"],"title_canon_sha256":"4e9b23347af72f791865d98b63f4a9163c0a1438b259937a5314d7b8b58654ae","abstract_canon_sha256":"70f816c3c3c24d557a15fc76a7d711faddcba5043235431c4f1df7a4748a41da"},"schema_version":"1.0"},"canonical_sha256":"2711f5382973c4a494a44fd5f7d7e627071d5287f3bec818d95b31890fb224e3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:30:40.341442Z","signature_b64":"Ol2R/81+Hj9TOMLedtYap3OAUAFnHc/uK98mht2xvRhpjJ0D+LdHdEDAMwb0DVgAxKDQ0A8jZazq/hBoSxmYAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2711f5382973c4a494a44fd5f7d7e627071d5287f3bec818d95b31890fb224e3","last_reissued_at":"2026-05-18T00:30:40.340791Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:30:40.340791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1710.11058","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":"2026-05-18T00:30:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"VV/oK3qjPcT/vtHrRbcFD6KUI9lg3zd2O9yFVxCKG2773ANBIDZxzgAYc/U3KJD2/cg/mGWlw1jAHWwzRvE7Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T06:10:56.426254Z"},"content_sha256":"224dd9b8ba844dd9d85b7f008c2188b32183b0f5cfd9a71d438cba8655279326","schema_version":"1.0","event_id":"sha256:224dd9b8ba844dd9d85b7f008c2188b32183b0f5cfd9a71d438cba8655279326"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:E4I7KOBJOPCKJFFEJ7K7PV7GE4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Three-dimensional image reconstruction in J-PET using Filtered Back Projection method","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","physics.med-ph"],"primary_cat":"physics.ins-det","authors_text":"A. Gajos, A. Wieczorek, B. G{\\l}owacz, B. Hiesmayr, B. Jasi\\'nska, B. Zgardzi\\'nska, C. Curceanu, D. Kisielewska-Kami\\'nska, E. Czerwi\\'nski, E. Kubicz, G. Korcyl, K. Dulski, K. Klimaszewski, L. Raczy\\'nski, M. Gorgol, M. Mohammed, M. Pa{\\l}ka, M. Pawlik-Nied\\'zwiecka, M. Silarski, M. Skurzok, M. Zieli\\'nski, N. G. Sharma, N. Krawczyk, P. Bia{\\l}as, P. Kowalski, P. Moskal, R. Y. Shopa, S. Nied\\'zwiecki, S. Sharma, T. Kozik, W. Krzemie\\'n, W. Wi\\'slicki, Z. Rudy","submitted_at":"2017-10-30T16:46:18Z","abstract_excerpt":"We present a method and preliminary results of the image reconstruction in the Jagiellonian PET tomograph. Using GATE (Geant4 Application for Tomographic Emission), interactions of the 511 keV photons with a cylindrical detector were generated. Pairs of such photons, flying back-to-back, originate from e+e- annihilations inside a 1-mm spherical source. Spatial and temporal coordinates of hits were smeared using experimental resolutions of the detector. We incorporated the algorithm of the 3D Filtered Back Projection, implemented in the STIR and TomoPy software packages, which differ in approxi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.11058","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":""},"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":"2026-05-18T00:30:40Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"HAzSp6TgGIHDICUt88te2BlnXBx1maS5Adi/9BpEOqVb/HwMRyEKUELM5gAUZq6g0qjiRI+wUtbtxXdtFX/fBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-04T06:10:56.426738Z"},"content_sha256":"d4bd86070b80922cfb9964a8dc5e5d809d96e56c50d891ae643c8dc9906d1606","schema_version":"1.0","event_id":"sha256:d4bd86070b80922cfb9964a8dc5e5d809d96e56c50d891ae643c8dc9906d1606"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/E4I7KOBJOPCKJFFEJ7K7PV7GE4/bundle.json","state_url":"https://pith.science/pith/E4I7KOBJOPCKJFFEJ7K7PV7GE4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/E4I7KOBJOPCKJFFEJ7K7PV7GE4/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":"2026-06-04T06:10:56Z","links":{"resolver":"https://pith.science/pith/E4I7KOBJOPCKJFFEJ7K7PV7GE4","bundle":"https://pith.science/pith/E4I7KOBJOPCKJFFEJ7K7PV7GE4/bundle.json","state":"https://pith.science/pith/E4I7KOBJOPCKJFFEJ7K7PV7GE4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/E4I7KOBJOPCKJFFEJ7K7PV7GE4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:E4I7KOBJOPCKJFFEJ7K7PV7GE4","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":"70f816c3c3c24d557a15fc76a7d711faddcba5043235431c4f1df7a4748a41da","cross_cats_sorted":["hep-ex","physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-10-30T16:46:18Z","title_canon_sha256":"4e9b23347af72f791865d98b63f4a9163c0a1438b259937a5314d7b8b58654ae"},"schema_version":"1.0","source":{"id":"1710.11058","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1710.11058","created_at":"2026-05-18T00:30:40Z"},{"alias_kind":"arxiv_version","alias_value":"1710.11058v1","created_at":"2026-05-18T00:30:40Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1710.11058","created_at":"2026-05-18T00:30:40Z"},{"alias_kind":"pith_short_12","alias_value":"E4I7KOBJOPCK","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_16","alias_value":"E4I7KOBJOPCKJFFE","created_at":"2026-05-18T12:31:12Z"},{"alias_kind":"pith_short_8","alias_value":"E4I7KOBJ","created_at":"2026-05-18T12:31:12Z"}],"graph_snapshots":[{"event_id":"sha256:d4bd86070b80922cfb9964a8dc5e5d809d96e56c50d891ae643c8dc9906d1606","target":"graph","created_at":"2026-05-18T00:30:40Z","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":"We present a method and preliminary results of the image reconstruction in the Jagiellonian PET tomograph. Using GATE (Geant4 Application for Tomographic Emission), interactions of the 511 keV photons with a cylindrical detector were generated. Pairs of such photons, flying back-to-back, originate from e+e- annihilations inside a 1-mm spherical source. Spatial and temporal coordinates of hits were smeared using experimental resolutions of the detector. We incorporated the algorithm of the 3D Filtered Back Projection, implemented in the STIR and TomoPy software packages, which differ in approxi","authors_text":"A. Gajos, A. Wieczorek, B. G{\\l}owacz, B. Hiesmayr, B. Jasi\\'nska, B. Zgardzi\\'nska, C. Curceanu, D. Kisielewska-Kami\\'nska, E. Czerwi\\'nski, E. Kubicz, G. Korcyl, K. Dulski, K. Klimaszewski, L. Raczy\\'nski, M. Gorgol, M. Mohammed, M. Pa{\\l}ka, M. Pawlik-Nied\\'zwiecka, M. Silarski, M. Skurzok, M. Zieli\\'nski, N. G. Sharma, N. Krawczyk, P. Bia{\\l}as, P. Kowalski, P. Moskal, R. Y. Shopa, S. Nied\\'zwiecki, S. Sharma, T. Kozik, W. Krzemie\\'n, W. Wi\\'slicki, Z. Rudy","cross_cats":["hep-ex","physics.med-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-10-30T16:46:18Z","title":"Three-dimensional image reconstruction in J-PET using Filtered Back Projection method"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.11058","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":"sha256:224dd9b8ba844dd9d85b7f008c2188b32183b0f5cfd9a71d438cba8655279326","target":"record","created_at":"2026-05-18T00:30:40Z","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":"70f816c3c3c24d557a15fc76a7d711faddcba5043235431c4f1df7a4748a41da","cross_cats_sorted":["hep-ex","physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.ins-det","submitted_at":"2017-10-30T16:46:18Z","title_canon_sha256":"4e9b23347af72f791865d98b63f4a9163c0a1438b259937a5314d7b8b58654ae"},"schema_version":"1.0","source":{"id":"1710.11058","kind":"arxiv","version":1}},"canonical_sha256":"2711f5382973c4a494a44fd5f7d7e627071d5287f3bec818d95b31890fb224e3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2711f5382973c4a494a44fd5f7d7e627071d5287f3bec818d95b31890fb224e3","first_computed_at":"2026-05-18T00:30:40.340791Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:30:40.340791Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ol2R/81+Hj9TOMLedtYap3OAUAFnHc/uK98mht2xvRhpjJ0D+LdHdEDAMwb0DVgAxKDQ0A8jZazq/hBoSxmYAw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:30:40.341442Z","signed_message":"canonical_sha256_bytes"},"source_id":"1710.11058","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:224dd9b8ba844dd9d85b7f008c2188b32183b0f5cfd9a71d438cba8655279326","sha256:d4bd86070b80922cfb9964a8dc5e5d809d96e56c50d891ae643c8dc9906d1606"],"state_sha256":"41d66ed259facb5358a657468f96d5a98d55b9d6ee8ee69d2564bd3bbabdab5f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+uFa5lwuovne2z/7mAPtn9Nje+cJrTtgO/UJu2k5fTc9xXkhtq2oZhcRYqzubtEzusMBPln0g7QbXaV1uJOwBg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-04T06:10:56.429082Z","bundle_sha256":"2b5d8cdef9d954d81f8cf7ac357d9be0de506c0a644d05643b65a97ebe353c1e"}}