{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:UGN6YMFUVF4QIHSF3CB6RQ6OJ6","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":"99eb74f3ec110d8ef8e4ee07b3db86b6c6301d440f30e96763092b3df2002610","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-01-04T22:00:20Z","title_canon_sha256":"f810d346d1037e15b346826b0c5d235a0ef433d280d3564c1119cdac2c18bf42"},"schema_version":"1.0","source":{"id":"1801.01557","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1801.01557","created_at":"2026-05-18T00:26:41Z"},{"alias_kind":"arxiv_version","alias_value":"1801.01557v1","created_at":"2026-05-18T00:26:41Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1801.01557","created_at":"2026-05-18T00:26:41Z"},{"alias_kind":"pith_short_12","alias_value":"UGN6YMFUVF4Q","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_16","alias_value":"UGN6YMFUVF4QIHSF","created_at":"2026-05-18T12:32:56Z"},{"alias_kind":"pith_short_8","alias_value":"UGN6YMFU","created_at":"2026-05-18T12:32:56Z"}],"graph_snapshots":[{"event_id":"sha256:64931b261be8ba0c5d02d6e8820b5b2b6b8fc7f5361942e05548c37d34cc10a9","target":"graph","created_at":"2026-05-18T00:26:41Z","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":"Reproducibly achieving proper implant alignment is a critical step in total hip arthroplasty (THA) procedures that has been shown to substantially affect patient outcome. In current practice, correct alignment of the acetabular cup is verified in C-arm X-ray images that are acquired in an anterior-posterior (AP) view. Favorable surgical outcome is, therefore, heavily dependent on the surgeon's experience in understanding the 3D orientation of a hemispheric implant from 2D AP projection images. This work proposes an easy to use intra-operative component planning system based on two C-arm X-ray ","authors_text":"Alex Johnson, Bernhard Fuerst, Clayton P. Alexander, Giacomo Taylor, Greg Osgood, Harpal Khanuja, Javad Fotouhi, Mathias Unberath, Mehran Armand, Nassir Navab, Russell H. Taylor, Sing Chun Lee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-01-04T22:00:20Z","title":"Plan in 2D, execute in 3D: An augmented reality solution for cup placement in total hip arthroplasty"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1801.01557","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":"sha256:2b51405deeec3b106dd5e4269ac1f17edaace9e8769f0c4b80edf928145b34b6","target":"record","created_at":"2026-05-18T00:26:41Z","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":"99eb74f3ec110d8ef8e4ee07b3db86b6c6301d440f30e96763092b3df2002610","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-01-04T22:00:20Z","title_canon_sha256":"f810d346d1037e15b346826b0c5d235a0ef433d280d3564c1119cdac2c18bf42"},"schema_version":"1.0","source":{"id":"1801.01557","kind":"arxiv","version":1}},"canonical_sha256":"a19bec30b4a979041e45d883e8c3ce4f8e7e1c8e2590d4f5444e1290be7aa6e4","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"a19bec30b4a979041e45d883e8c3ce4f8e7e1c8e2590d4f5444e1290be7aa6e4","first_computed_at":"2026-05-18T00:26:41.827835Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:41.827835Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ti6sZBIRo+5VpvD2I/M0lIkhOfkSsDAZRTcPMyKh5sBfQHYVXmo6IA0gRmnNhAChbOxMSbciYhi/2MaU5xYLCA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:41.828367Z","signed_message":"canonical_sha256_bytes"},"source_id":"1801.01557","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2b51405deeec3b106dd5e4269ac1f17edaace9e8769f0c4b80edf928145b34b6","sha256:64931b261be8ba0c5d02d6e8820b5b2b6b8fc7f5361942e05548c37d34cc10a9"],"state_sha256":"bbe217cba9c9f5bb9a51c8a30fe305cc293cb28bf737082d7e29bc128206033c"}