{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:IDZJ33YM6OUXDWCUBY6F3FZN2J","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":"9fbca8a0436df75fe06a1c61cc7c71da45ffd4027d0626fb2e3c6f1ee4c8b810","cross_cats_sorted":["eess.IV","physics.bio-ph","physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-06-27T13:22:31Z","title_canon_sha256":"6903e92bc1d3a2080de109f76ccc4d2516bf2722290426c9382c6ac7ff23ab0a"},"schema_version":"1.0","source":{"id":"1906.11615","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1906.11615","created_at":"2026-07-05T00:11:34Z"},{"alias_kind":"arxiv_version","alias_value":"1906.11615v3","created_at":"2026-07-05T00:11:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1906.11615","created_at":"2026-07-05T00:11:34Z"},{"alias_kind":"pith_short_12","alias_value":"IDZJ33YM6OUX","created_at":"2026-07-05T00:11:34Z"},{"alias_kind":"pith_short_16","alias_value":"IDZJ33YM6OUXDWCU","created_at":"2026-07-05T00:11:34Z"},{"alias_kind":"pith_short_8","alias_value":"IDZJ33YM","created_at":"2026-07-05T00:11:34Z"}],"graph_snapshots":[{"event_id":"sha256:894693318fe1e93d06bc89e06be21e8d39715ee0595cc1283a64e4794b2a812a","target":"graph","created_at":"2026-07-05T00:11:34Z","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/1906.11615/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Ultrasound attenuation is caused by absorption and scattering in tissue and is thus a function of tissue composition, hence its imaging offers great potential for screening and differential diagnosis. In this paper we propose a novel method that allows to reconstruct spatial attenuation distribution in tissue based on computed tomography, using reflections from a passive acoustic reflector. This requires a standard ultrasound transducer operating in pulse-echo mode, thus it can be implemented on conventional ultrasound systems with minor modifications. We use calibration with water measurement","authors_text":"Dieter Schweizer, Orcun Goksel, Ozan Unal, Richard Rau, Valery Vishnevskiy","cross_cats":["eess.IV","physics.bio-ph","physics.med-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-06-27T13:22:31Z","title":"Attenuation Imaging with Pulse-Echo Ultrasound based on an Acoustic Reflector"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1906.11615","kind":"arxiv","version":3},"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:e7e159340dd28e58282ebc1d0490303b7a031e33c6119653bdd7b3f5d7addb5d","target":"record","created_at":"2026-07-05T00:11:34Z","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":"9fbca8a0436df75fe06a1c61cc7c71da45ffd4027d0626fb2e3c6f1ee4c8b810","cross_cats_sorted":["eess.IV","physics.bio-ph","physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.SP","submitted_at":"2019-06-27T13:22:31Z","title_canon_sha256":"6903e92bc1d3a2080de109f76ccc4d2516bf2722290426c9382c6ac7ff23ab0a"},"schema_version":"1.0","source":{"id":"1906.11615","kind":"arxiv","version":3}},"canonical_sha256":"40f29def0cf3a971d8540e3c5d972dd25ccccf7f715ce5653087e722a9fb1b93","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"40f29def0cf3a971d8540e3c5d972dd25ccccf7f715ce5653087e722a9fb1b93","first_computed_at":"2026-07-05T00:11:34.912783Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T00:11:34.912783Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"m0cstBsQiRk+AMUHt8P1LssMHij6BA3dfmW4kM0rc9S416uZ0hYX+txKwTyDs7fHa4CQ3EX6YjXoHEIj/nI2DA==","signature_status":"signed_v1","signed_at":"2026-07-05T00:11:34.913211Z","signed_message":"canonical_sha256_bytes"},"source_id":"1906.11615","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e7e159340dd28e58282ebc1d0490303b7a031e33c6119653bdd7b3f5d7addb5d","sha256:894693318fe1e93d06bc89e06be21e8d39715ee0595cc1283a64e4794b2a812a"],"state_sha256":"dd2e6c62383bf3e60a6c6266c9d22d005a8b9179a4f5a3d0d8e898790336aa5b"}