{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:SDYYKBOMUTGJ35ECAF3T7EIJCD","short_pith_number":"pith:SDYYKBOM","canonical_record":{"source":{"id":"1708.08524","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-08-28T20:57:22Z","cross_cats_sorted":[],"title_canon_sha256":"ecd10b36521c3b7f07e88cc1ded8c6a93888b9bf65871a30401903be5cf2ccec","abstract_canon_sha256":"ad7d8de1ee1cbc1bc722668ca9b07e784541686b2b3ab547c04e3119133aec37"},"schema_version":"1.0"},"canonical_sha256":"90f18505cca4cc9df48201773f910910d4df0e6d6aa4ebf62478c5fea06a5e92","source":{"kind":"arxiv","id":"1708.08524","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.08524","created_at":"2026-05-18T00:35:50Z"},{"alias_kind":"arxiv_version","alias_value":"1708.08524v2","created_at":"2026-05-18T00:35:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.08524","created_at":"2026-05-18T00:35:50Z"},{"alias_kind":"pith_short_12","alias_value":"SDYYKBOMUTGJ","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SDYYKBOMUTGJ35EC","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SDYYKBOM","created_at":"2026-05-18T12:31:43Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:SDYYKBOMUTGJ35ECAF3T7EIJCD","target":"record","payload":{"canonical_record":{"source":{"id":"1708.08524","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-08-28T20:57:22Z","cross_cats_sorted":[],"title_canon_sha256":"ecd10b36521c3b7f07e88cc1ded8c6a93888b9bf65871a30401903be5cf2ccec","abstract_canon_sha256":"ad7d8de1ee1cbc1bc722668ca9b07e784541686b2b3ab547c04e3119133aec37"},"schema_version":"1.0"},"canonical_sha256":"90f18505cca4cc9df48201773f910910d4df0e6d6aa4ebf62478c5fea06a5e92","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:35:50.988812Z","signature_b64":"JQ/jwknrSlDSxFlL4e3Bv+UtpeYgV9b8fcAc2mWu1EeRB8fjkh2ERfYVLpqyGTr51nesNAfQsQkTPNr2Z/qFAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"90f18505cca4cc9df48201773f910910d4df0e6d6aa4ebf62478c5fea06a5e92","last_reissued_at":"2026-05-18T00:35:50.988357Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:35:50.988357Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1708.08524","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:35:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xHD+aTA6Vlc6XULFf5P1iw1/JgDHJlUKxn8HPbyBDMuLpuOrbs36pbBKrI8AWM2AFXlaxfKggvEL5vLiR4C4Dw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T10:15:16.399817Z"},"content_sha256":"afef391896d05caa96856599666555242340ae143ff645eee28b51196d6037df","schema_version":"1.0","event_id":"sha256:afef391896d05caa96856599666555242340ae143ff645eee28b51196d6037df"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:SDYYKBOMUTGJ35ECAF3T7EIJCD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Mitigation of artifacts due to isolated acoustic heterogeneities in photoacoustic computed tomography using a variable data truncation-based reconstruction method","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Joemini Poudel, Lei Li, Lihong V. Wang, Mark A. Anastasio, Thomas P. Matthews","submitted_at":"2017-08-28T20:57:22Z","abstract_excerpt":"Photoacoustic computed tomography (PACT) is an emerging computed imaging modality that exploits optical contrast and ultrasonic detection principles to form images of the absorbed optical energy density within tissue. If the object possesses spatially variant acoustic properties that are unaccounted for by the reconstruction method, the estimated image can contain distortions. While reconstruction methods have recently been developed to compensate for this effect, they generally require the object's acoustic properties to be known a priori. To circumvent the need for detailed information regar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.08524","kind":"arxiv","version":2},"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":"2026-05-18T00:35:50Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"DzVSpSUVXcCyucheQ+iLXVOKykuSxJJmGx6kN4IJxwrqXSVOkvoU+zSV0ta5Ffx7NHVNkD0pyZHmri/YoYmtDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-19T10:15:16.400159Z"},"content_sha256":"50c5fc3b1d337f560c1c5bb1173de5789c6f2b75a8ebffe466f18f31768a795d","schema_version":"1.0","event_id":"sha256:50c5fc3b1d337f560c1c5bb1173de5789c6f2b75a8ebffe466f18f31768a795d"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SDYYKBOMUTGJ35ECAF3T7EIJCD/bundle.json","state_url":"https://pith.science/pith/SDYYKBOMUTGJ35ECAF3T7EIJCD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SDYYKBOMUTGJ35ECAF3T7EIJCD/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":"2026-05-19T10:15:16Z","links":{"resolver":"https://pith.science/pith/SDYYKBOMUTGJ35ECAF3T7EIJCD","bundle":"https://pith.science/pith/SDYYKBOMUTGJ35ECAF3T7EIJCD/bundle.json","state":"https://pith.science/pith/SDYYKBOMUTGJ35ECAF3T7EIJCD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SDYYKBOMUTGJ35ECAF3T7EIJCD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:SDYYKBOMUTGJ35ECAF3T7EIJCD","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":"ad7d8de1ee1cbc1bc722668ca9b07e784541686b2b3ab547c04e3119133aec37","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-08-28T20:57:22Z","title_canon_sha256":"ecd10b36521c3b7f07e88cc1ded8c6a93888b9bf65871a30401903be5cf2ccec"},"schema_version":"1.0","source":{"id":"1708.08524","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1708.08524","created_at":"2026-05-18T00:35:50Z"},{"alias_kind":"arxiv_version","alias_value":"1708.08524v2","created_at":"2026-05-18T00:35:50Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1708.08524","created_at":"2026-05-18T00:35:50Z"},{"alias_kind":"pith_short_12","alias_value":"SDYYKBOMUTGJ","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_16","alias_value":"SDYYKBOMUTGJ35EC","created_at":"2026-05-18T12:31:43Z"},{"alias_kind":"pith_short_8","alias_value":"SDYYKBOM","created_at":"2026-05-18T12:31:43Z"}],"graph_snapshots":[{"event_id":"sha256:50c5fc3b1d337f560c1c5bb1173de5789c6f2b75a8ebffe466f18f31768a795d","target":"graph","created_at":"2026-05-18T00:35:50Z","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":"Photoacoustic computed tomography (PACT) is an emerging computed imaging modality that exploits optical contrast and ultrasonic detection principles to form images of the absorbed optical energy density within tissue. If the object possesses spatially variant acoustic properties that are unaccounted for by the reconstruction method, the estimated image can contain distortions. While reconstruction methods have recently been developed to compensate for this effect, they generally require the object's acoustic properties to be known a priori. To circumvent the need for detailed information regar","authors_text":"Joemini Poudel, Lei Li, Lihong V. Wang, Mark A. Anastasio, Thomas P. Matthews","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-08-28T20:57:22Z","title":"Mitigation of artifacts due to isolated acoustic heterogeneities in photoacoustic computed tomography using a variable data truncation-based reconstruction method"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.08524","kind":"arxiv","version":2},"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:afef391896d05caa96856599666555242340ae143ff645eee28b51196d6037df","target":"record","created_at":"2026-05-18T00:35:50Z","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":"ad7d8de1ee1cbc1bc722668ca9b07e784541686b2b3ab547c04e3119133aec37","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-08-28T20:57:22Z","title_canon_sha256":"ecd10b36521c3b7f07e88cc1ded8c6a93888b9bf65871a30401903be5cf2ccec"},"schema_version":"1.0","source":{"id":"1708.08524","kind":"arxiv","version":2}},"canonical_sha256":"90f18505cca4cc9df48201773f910910d4df0e6d6aa4ebf62478c5fea06a5e92","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"90f18505cca4cc9df48201773f910910d4df0e6d6aa4ebf62478c5fea06a5e92","first_computed_at":"2026-05-18T00:35:50.988357Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:35:50.988357Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"JQ/jwknrSlDSxFlL4e3Bv+UtpeYgV9b8fcAc2mWu1EeRB8fjkh2ERfYVLpqyGTr51nesNAfQsQkTPNr2Z/qFAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:35:50.988812Z","signed_message":"canonical_sha256_bytes"},"source_id":"1708.08524","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:afef391896d05caa96856599666555242340ae143ff645eee28b51196d6037df","sha256:50c5fc3b1d337f560c1c5bb1173de5789c6f2b75a8ebffe466f18f31768a795d"],"state_sha256":"db5bfc1c92531ac7d32c49b3a4b8fb60add60ed720453fcb78b235184bf82ed9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+XdV+QPCqx4B58w8HH60fInjgSKaXZctPkZre8YtyLHMT5xUR6N3nmdRQukPjd6nzodNryvboB5gITOemeVLAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-19T10:15:16.401769Z","bundle_sha256":"8dd651b468133dfdbc0c4c3fe76eb341c85bc4f2414aa2b550a8d800b18a3be0"}}