{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:NPK57Y6WEPXD3YWSCT4EIXI6ZY","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":"6df30645d4b04bc047e66ac5ac1c08fdef026958553880550a427625a10c7c28","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-02-18T21:15:54Z","title_canon_sha256":"ac47f31d1e02354cdca3c9f4c8427f88de1c37a83d8f13e02d10d5952034518d"},"schema_version":"1.0","source":{"id":"1802.06446","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.06446","created_at":"2026-05-18T00:23:03Z"},{"alias_kind":"arxiv_version","alias_value":"1802.06446v1","created_at":"2026-05-18T00:23:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.06446","created_at":"2026-05-18T00:23:03Z"},{"alias_kind":"pith_short_12","alias_value":"NPK57Y6WEPXD","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_16","alias_value":"NPK57Y6WEPXD3YWS","created_at":"2026-05-18T12:32:40Z"},{"alias_kind":"pith_short_8","alias_value":"NPK57Y6W","created_at":"2026-05-18T12:32:40Z"}],"graph_snapshots":[{"event_id":"sha256:f8a409ceb5d186ca0dc980f38e99e63b1790ed15121d0e8ac90b723bfb384894","target":"graph","created_at":"2026-05-18T00:23:03Z","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":"Purpose. Intraoperative Optical Coherence Tomography (iOCT) is an increasingly available imaging technique for ophthalmic microsurgery that provides high-resolution cross-sectional information of the surgical scene. We propose to build on its desirable qualities and present a method for tracking the orientation and location of a surgical needle. Thereby, we enable direct analysis of instrument-tissue interaction directly in OCT space without complex multimodal calibration that would be required with traditional instrument tracking methods. Method. The intersection of the needle with the iOCT s","authors_text":"Abouzar Eslami, Jakob Weiss, Mathias Maier, Mohammad Ali Nasseri, Nassir Navab, Nicola Rieke","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-02-18T21:15:54Z","title":"Fast 5DOF Needle Tracking in iOCT"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.06446","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:dcfcd0adb2fed467dd99a8e1561086eeddee644fd81c0d4ebc7146a0f2f4b225","target":"record","created_at":"2026-05-18T00:23:03Z","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":"6df30645d4b04bc047e66ac5ac1c08fdef026958553880550a427625a10c7c28","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-02-18T21:15:54Z","title_canon_sha256":"ac47f31d1e02354cdca3c9f4c8427f88de1c37a83d8f13e02d10d5952034518d"},"schema_version":"1.0","source":{"id":"1802.06446","kind":"arxiv","version":1}},"canonical_sha256":"6bd5dfe3d623ee3de2d214f8445d1ece3a97c53e8df100fa49d5104b38130406","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6bd5dfe3d623ee3de2d214f8445d1ece3a97c53e8df100fa49d5104b38130406","first_computed_at":"2026-05-18T00:23:03.296085Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:23:03.296085Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"bTrC24tbe4wwpjImSsEoKWwRnjO1XB1sTi85jQfSJSZoXZgDlQ7LGiM1y+B1bkkclqVWqqqWGyx2mepgH9HfAQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:23:03.296763Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.06446","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:dcfcd0adb2fed467dd99a8e1561086eeddee644fd81c0d4ebc7146a0f2f4b225","sha256:f8a409ceb5d186ca0dc980f38e99e63b1790ed15121d0e8ac90b723bfb384894"],"state_sha256":"535849f8de2de78813b5b704604e47975eb0c04d97e6910081f81f32df35e823"}