{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:UPMSAHAJWM6HR3NMUNKWQNAQ72","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":"9cc79b4fed031b69d439cc8b02059640b0a1c191ee598da08249b25b3a9b7d4e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2014-09-06T17:21:09Z","title_canon_sha256":"3786ea3c71e7142dd18c15f24a751daf83a5757b0966d68dad6a8b2cb1e88d28"},"schema_version":"1.0","source":{"id":"1409.2035","kind":"arxiv","version":3}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1409.2035","created_at":"2026-05-18T01:18:52Z"},{"alias_kind":"arxiv_version","alias_value":"1409.2035v3","created_at":"2026-05-18T01:18:52Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1409.2035","created_at":"2026-05-18T01:18:52Z"},{"alias_kind":"pith_short_12","alias_value":"UPMSAHAJWM6H","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_16","alias_value":"UPMSAHAJWM6HR3NM","created_at":"2026-05-18T12:28:52Z"},{"alias_kind":"pith_short_8","alias_value":"UPMSAHAJ","created_at":"2026-05-18T12:28:52Z"}],"graph_snapshots":[{"event_id":"sha256:1eddda914abbee79d23f48d8d06984e4121f42d4190711393e5f88c8e758530b","target":"graph","created_at":"2026-05-18T01:18:52Z","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":"Ultrasound-modulated optical tomography is an emerging biomedical imaging modality which uses the spatially localised acoustically-driven modulation of coherent light as a probe of the structure and optical properties of biological tissues. In this work we begin by providing an overview of forward modelling methods, before deriving a linearised diffusion-style model which calculates the first-harmonic modulated flux measured on the boundary of a given domain. We derive and examine the correlation measurement density functions of the model which describe the sensitivity of the modality to pertu","authors_text":"Samuel Powell, Simon R. Arridge, Terence S. Leung","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2014-09-06T17:21:09Z","title":"Gradient-based quantitative image reconstruction in ultrasound-modulated optical tomography: first harmonic measurement type in a linearised diffusion formulation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1409.2035","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":"sha256:75cbf8167da084f9ee829b6ec9bb0822bef7feb9ddbc7d218236a4adc3f11c9b","target":"record","created_at":"2026-05-18T01:18:52Z","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":"9cc79b4fed031b69d439cc8b02059640b0a1c191ee598da08249b25b3a9b7d4e","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2014-09-06T17:21:09Z","title_canon_sha256":"3786ea3c71e7142dd18c15f24a751daf83a5757b0966d68dad6a8b2cb1e88d28"},"schema_version":"1.0","source":{"id":"1409.2035","kind":"arxiv","version":3}},"canonical_sha256":"a3d9201c09b33c78edaca355683410fe8e992145577e5d9bb41a8719de5d6d63","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a3d9201c09b33c78edaca355683410fe8e992145577e5d9bb41a8719de5d6d63","first_computed_at":"2026-05-18T01:18:52.910674Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:18:52.910674Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"d0Wj6DjOi1eyyx6L1M8Ezr1Kksg8GP49+OKlr/A8EQkgLA5NVoLuqfsOvidCbNM3SnY8UsL43RVAhUpzcP0/BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:18:52.911467Z","signed_message":"canonical_sha256_bytes"},"source_id":"1409.2035","source_kind":"arxiv","source_version":3}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:75cbf8167da084f9ee829b6ec9bb0822bef7feb9ddbc7d218236a4adc3f11c9b","sha256:1eddda914abbee79d23f48d8d06984e4121f42d4190711393e5f88c8e758530b"],"state_sha256":"4de1abf924e0d27b1f5796d52ddc375ffd2693ee7798dffcb3f6c9809e4a66bf"}