{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:SICYWDTBKM74HMVUZWOF2RJJK5","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":"9486e55c713dfd292a1e7bbb940da4f9beb929ea69c9558135024af98666e4e0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-08-27T15:29:36Z","title_canon_sha256":"9806b44aa7083645484922f410338853490bdfd7b9d3c512a7cb745d8d0b3365"},"schema_version":"1.0","source":{"id":"1808.08883","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1808.08883","created_at":"2026-05-18T00:07:12Z"},{"alias_kind":"arxiv_version","alias_value":"1808.08883v1","created_at":"2026-05-18T00:07:12Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1808.08883","created_at":"2026-05-18T00:07:12Z"},{"alias_kind":"pith_short_12","alias_value":"SICYWDTBKM74","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_16","alias_value":"SICYWDTBKM74HMVU","created_at":"2026-05-18T12:32:53Z"},{"alias_kind":"pith_short_8","alias_value":"SICYWDTB","created_at":"2026-05-18T12:32:53Z"}],"graph_snapshots":[{"event_id":"sha256:c35abec9bbb2a6472caa71acda7dbea1bdec2f2e44f11f1b579657b89f050748","target":"graph","created_at":"2026-05-18T00:07:12Z","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":"Physiological sensing deep in tissue, remains a clinical challenge. Here a flexible miniaturised sensing optrode providing a platform to perform minimally invasive in vivo in situ measurements is reported. Silica microspheres covalently coupled with a high density of ratiometrically configured fluorophores were deposited into etched pits on the distal end of a 150 micron diameter multicore optical fibre. With this platform, multiplexed photonic measurements of pH and oxygen concentration with high precision in the distal alveolar space of the lung is reported. We demonstrated the phenomenon th","authors_text":"Adam Marshall, Alicia Megia-Fernandez, Debaditya Choudhury, Fei Yu, Graham Monro, Harry A. Wood, Kerrianne Harrington, Kevin Dhaliwal, Mark Bradley, Michael G. Tanner, Muhammed Ucuncu, Patricia Zhu, Robert R. Thomson, Rory R. Duncan, Sunay V. Chankeshwara, Tushar R. Choudhary","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-08-27T15:29:36Z","title":"High fidelity fibre-based physiological sensing deep in tissue"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1808.08883","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":"sha256:114ffbbe292879b7b610ab3caaf467b1bc9f53a8837ad99c334bb75731ae8708","target":"record","created_at":"2026-05-18T00:07:12Z","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":"9486e55c713dfd292a1e7bbb940da4f9beb929ea69c9558135024af98666e4e0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-08-27T15:29:36Z","title_canon_sha256":"9806b44aa7083645484922f410338853490bdfd7b9d3c512a7cb745d8d0b3365"},"schema_version":"1.0","source":{"id":"1808.08883","kind":"arxiv","version":1}},"canonical_sha256":"92058b0e61533fc3b2b4cd9c5d452957605dd49b96f80461697266c92b0d5894","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"92058b0e61533fc3b2b4cd9c5d452957605dd49b96f80461697266c92b0d5894","first_computed_at":"2026-05-18T00:07:12.948081Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:07:12.948081Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"3lSsuoBGPhHkI6uzsEAwHuggxa9y79rjPjfDs7QysmevhdYmez08sDxj++wo/HTv+K5JK5N7fMzzwYsHz/oJBA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:07:12.948825Z","signed_message":"canonical_sha256_bytes"},"source_id":"1808.08883","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:114ffbbe292879b7b610ab3caaf467b1bc9f53a8837ad99c334bb75731ae8708","sha256:c35abec9bbb2a6472caa71acda7dbea1bdec2f2e44f11f1b579657b89f050748"],"state_sha256":"dd71ffcd7173784022bd103b3dee4f198022f9c3246a1e438ec9102207e91585"}