{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2018:ERUX3EVTT24BKF6N45MBGYONQF","short_pith_number":"pith:ERUX3EVT","schema_version":"1.0","canonical_sha256":"24697d92b39eb81517cde7581361cd81716d471b0f58c982998fb98e051f3db3","source":{"kind":"arxiv","id":"1806.03997","version":1},"attestation_state":"computed","paper":{"title":"Endoscopic navigation in the absence of CT imaging","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"eess.IV","authors_text":"Austin Reiter, Ayushi Sinha, Gregory D. Hager, Masaru Ishii, Russell H. Taylor, Xingtong Liu","submitted_at":"2018-06-08T03:21:13Z","abstract_excerpt":"Clinical examinations that involve endoscopic exploration of the nasal cavity and sinuses often do not have a reference image to provide structural context to the clinician. In this paper, we present a system for navigation during clinical endoscopic exploration in the absence of computed tomography (CT) scans by making use of shape statistics from past CT scans. Using a deformable registration algorithm along with dense reconstructions from video, we show that we are able to achieve submillimeter registrations in in-vivo clinical data and are able to assign confidence to these registrations u"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1806.03997","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2018-06-08T03:21:13Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"49c11756bdad4b98d744a173d00db8d307ae7c7c76cc227fbcbee03307d43067","abstract_canon_sha256":"11fe251749e705df5f4bb26bf97a9c65b538dfd0b70f590e699239a7cd0400b1"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:49:45.108701Z","signature_b64":"Ypiu7wDC5P8zdiSmUSngkCIYTeEDaqpf2FNQP3QYpboi0qNFSFj0xXJYHXGO7J+mimWPNdEZfH8GNCrCxsCCCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"24697d92b39eb81517cde7581361cd81716d471b0f58c982998fb98e051f3db3","last_reissued_at":"2026-05-17T23:49:45.108129Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:49:45.108129Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Endoscopic navigation in the absence of CT imaging","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"eess.IV","authors_text":"Austin Reiter, Ayushi Sinha, Gregory D. Hager, Masaru Ishii, Russell H. Taylor, Xingtong Liu","submitted_at":"2018-06-08T03:21:13Z","abstract_excerpt":"Clinical examinations that involve endoscopic exploration of the nasal cavity and sinuses often do not have a reference image to provide structural context to the clinician. In this paper, we present a system for navigation during clinical endoscopic exploration in the absence of computed tomography (CT) scans by making use of shape statistics from past CT scans. Using a deformable registration algorithm along with dense reconstructions from video, we show that we are able to achieve submillimeter registrations in in-vivo clinical data and are able to assign confidence to these registrations u"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.03997","kind":"arxiv","version":1},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1806.03997","created_at":"2026-05-17T23:49:45.108211+00:00"},{"alias_kind":"arxiv_version","alias_value":"1806.03997v1","created_at":"2026-05-17T23:49:45.108211+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1806.03997","created_at":"2026-05-17T23:49:45.108211+00:00"},{"alias_kind":"pith_short_12","alias_value":"ERUX3EVTT24B","created_at":"2026-05-18T12:32:22.470017+00:00"},{"alias_kind":"pith_short_16","alias_value":"ERUX3EVTT24BKF6N","created_at":"2026-05-18T12:32:22.470017+00:00"},{"alias_kind":"pith_short_8","alias_value":"ERUX3EVT","created_at":"2026-05-18T12:32:22.470017+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/ERUX3EVTT24BKF6N45MBGYONQF","json":"https://pith.science/pith/ERUX3EVTT24BKF6N45MBGYONQF.json","graph_json":"https://pith.science/api/pith-number/ERUX3EVTT24BKF6N45MBGYONQF/graph.json","events_json":"https://pith.science/api/pith-number/ERUX3EVTT24BKF6N45MBGYONQF/events.json","paper":"https://pith.science/paper/ERUX3EVT"},"agent_actions":{"view_html":"https://pith.science/pith/ERUX3EVTT24BKF6N45MBGYONQF","download_json":"https://pith.science/pith/ERUX3EVTT24BKF6N45MBGYONQF.json","view_paper":"https://pith.science/paper/ERUX3EVT","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1806.03997&json=true","fetch_graph":"https://pith.science/api/pith-number/ERUX3EVTT24BKF6N45MBGYONQF/graph.json","fetch_events":"https://pith.science/api/pith-number/ERUX3EVTT24BKF6N45MBGYONQF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/ERUX3EVTT24BKF6N45MBGYONQF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/ERUX3EVTT24BKF6N45MBGYONQF/action/storage_attestation","attest_author":"https://pith.science/pith/ERUX3EVTT24BKF6N45MBGYONQF/action/author_attestation","sign_citation":"https://pith.science/pith/ERUX3EVTT24BKF6N45MBGYONQF/action/citation_signature","submit_replication":"https://pith.science/pith/ERUX3EVTT24BKF6N45MBGYONQF/action/replication_record"}},"created_at":"2026-05-17T23:49:45.108211+00:00","updated_at":"2026-05-17T23:49:45.108211+00:00"}