{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:S5AYAHS47SNRYNXXDSEK44FRQS","short_pith_number":"pith:S5AYAHS4","canonical_record":{"source":{"id":"1803.08610","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-22T23:15:59Z","cross_cats_sorted":[],"title_canon_sha256":"b584bdcbbbfdcf5c3732207c5c439a1a7ca2f069c3a8ddbaeb09b288ea100995","abstract_canon_sha256":"3e5c4f89fdfc58b478c66d7498429b636df5bcaf62f1d643381fa3cdd4885bbb"},"schema_version":"1.0"},"canonical_sha256":"9741801e5cfc9b1c36f71c88ae70b184b58480aaa339d66b1cb137616aa5d6b3","source":{"kind":"arxiv","id":"1803.08610","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.08610","created_at":"2026-05-18T00:20:19Z"},{"alias_kind":"arxiv_version","alias_value":"1803.08610v1","created_at":"2026-05-18T00:20:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.08610","created_at":"2026-05-18T00:20:19Z"},{"alias_kind":"pith_short_12","alias_value":"S5AYAHS47SNR","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"S5AYAHS47SNRYNXX","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"S5AYAHS4","created_at":"2026-05-18T12:32:50Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:S5AYAHS47SNRYNXXDSEK44FRQS","target":"record","payload":{"canonical_record":{"source":{"id":"1803.08610","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-22T23:15:59Z","cross_cats_sorted":[],"title_canon_sha256":"b584bdcbbbfdcf5c3732207c5c439a1a7ca2f069c3a8ddbaeb09b288ea100995","abstract_canon_sha256":"3e5c4f89fdfc58b478c66d7498429b636df5bcaf62f1d643381fa3cdd4885bbb"},"schema_version":"1.0"},"canonical_sha256":"9741801e5cfc9b1c36f71c88ae70b184b58480aaa339d66b1cb137616aa5d6b3","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:20:19.101382Z","signature_b64":"k5euidJIV4q0nOvdBY+o5qFkKTX0W4Qmf3tm9vh9ZeYhsJ8gK74O4bri06wBoi6+XbqFxCCAdJsCETu1doggAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9741801e5cfc9b1c36f71c88ae70b184b58480aaa339d66b1cb137616aa5d6b3","last_reissued_at":"2026-05-18T00:20:19.100688Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:20:19.100688Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1803.08610","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:20:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ySgb5o6XyGbh3zZuBcRUYJnPNkeha9swI4rjwCUbZFLo2Tx1b17e95NAmgpjK/eTPhIy8N+G2KYhR03geysNBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T00:46:12.508616Z"},"content_sha256":"fd1480e0a0fd534bf3dbd7d839bce0693379aba7f4974032960ac8365885f9ed","schema_version":"1.0","event_id":"sha256:fd1480e0a0fd534bf3dbd7d839bce0693379aba7f4974032960ac8365885f9ed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:S5AYAHS47SNRYNXXDSEK44FRQS","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Closing the Calibration Loop: An Inside-out-tracking Paradigm for Augmented Reality in Orthopedic Surgery","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Andreas Maier, Bastian Bier, Greg Osgood, Javad Fotouhi, Jonas Hajek, Mathias Unberath, Mehran Armand, Nassir Navab, Sing Chun Lee","submitted_at":"2018-03-22T23:15:59Z","abstract_excerpt":"In percutaneous orthopedic interventions the surgeon attempts to reduce and fixate fractures in bony structures. The complexity of these interventions arises when the surgeon performs the challenging task of navigating surgical tools percutaneously only under the guidance of 2D interventional X-ray imaging. Moreover, the intra-operatively acquired data is only visualized indirectly on external displays. In this work, we propose a flexible Augmented Reality (AR) paradigm using optical see-through head mounted displays. The key technical contribution of this work includes the marker-less and dyn"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.08610","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T00:20:19Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"8uqM3x7hmRXoVmgzNyiuvTyy0T6BMNrV553Gzi/5nygD1T6cdJqLZJMk5joAa3b4CbdRbVLIs3MAGnYIQtDZDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T00:46:12.509260Z"},"content_sha256":"6373c94dc654938f7397a9b004131b89df77d4a8a5093b8f60569f84cc925f7f","schema_version":"1.0","event_id":"sha256:6373c94dc654938f7397a9b004131b89df77d4a8a5093b8f60569f84cc925f7f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/S5AYAHS47SNRYNXXDSEK44FRQS/bundle.json","state_url":"https://pith.science/pith/S5AYAHS47SNRYNXXDSEK44FRQS/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/S5AYAHS47SNRYNXXDSEK44FRQS/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T00:46:12Z","links":{"resolver":"https://pith.science/pith/S5AYAHS47SNRYNXXDSEK44FRQS","bundle":"https://pith.science/pith/S5AYAHS47SNRYNXXDSEK44FRQS/bundle.json","state":"https://pith.science/pith/S5AYAHS47SNRYNXXDSEK44FRQS/state.json","well_known_bundle":"https://pith.science/.well-known/pith/S5AYAHS47SNRYNXXDSEK44FRQS/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:S5AYAHS47SNRYNXXDSEK44FRQS","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":"3e5c4f89fdfc58b478c66d7498429b636df5bcaf62f1d643381fa3cdd4885bbb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-22T23:15:59Z","title_canon_sha256":"b584bdcbbbfdcf5c3732207c5c439a1a7ca2f069c3a8ddbaeb09b288ea100995"},"schema_version":"1.0","source":{"id":"1803.08610","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1803.08610","created_at":"2026-05-18T00:20:19Z"},{"alias_kind":"arxiv_version","alias_value":"1803.08610v1","created_at":"2026-05-18T00:20:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1803.08610","created_at":"2026-05-18T00:20:19Z"},{"alias_kind":"pith_short_12","alias_value":"S5AYAHS47SNR","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_16","alias_value":"S5AYAHS47SNRYNXX","created_at":"2026-05-18T12:32:50Z"},{"alias_kind":"pith_short_8","alias_value":"S5AYAHS4","created_at":"2026-05-18T12:32:50Z"}],"graph_snapshots":[{"event_id":"sha256:6373c94dc654938f7397a9b004131b89df77d4a8a5093b8f60569f84cc925f7f","target":"graph","created_at":"2026-05-18T00:20:19Z","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":"In percutaneous orthopedic interventions the surgeon attempts to reduce and fixate fractures in bony structures. The complexity of these interventions arises when the surgeon performs the challenging task of navigating surgical tools percutaneously only under the guidance of 2D interventional X-ray imaging. Moreover, the intra-operatively acquired data is only visualized indirectly on external displays. In this work, we propose a flexible Augmented Reality (AR) paradigm using optical see-through head mounted displays. The key technical contribution of this work includes the marker-less and dyn","authors_text":"Andreas Maier, Bastian Bier, Greg Osgood, Javad Fotouhi, Jonas Hajek, Mathias Unberath, Mehran Armand, Nassir Navab, Sing Chun Lee","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-22T23:15:59Z","title":"Closing the Calibration Loop: An Inside-out-tracking Paradigm for Augmented Reality in Orthopedic Surgery"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.08610","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:fd1480e0a0fd534bf3dbd7d839bce0693379aba7f4974032960ac8365885f9ed","target":"record","created_at":"2026-05-18T00:20:19Z","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":"3e5c4f89fdfc58b478c66d7498429b636df5bcaf62f1d643381fa3cdd4885bbb","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-03-22T23:15:59Z","title_canon_sha256":"b584bdcbbbfdcf5c3732207c5c439a1a7ca2f069c3a8ddbaeb09b288ea100995"},"schema_version":"1.0","source":{"id":"1803.08610","kind":"arxiv","version":1}},"canonical_sha256":"9741801e5cfc9b1c36f71c88ae70b184b58480aaa339d66b1cb137616aa5d6b3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"9741801e5cfc9b1c36f71c88ae70b184b58480aaa339d66b1cb137616aa5d6b3","first_computed_at":"2026-05-18T00:20:19.100688Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:20:19.100688Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"k5euidJIV4q0nOvdBY+o5qFkKTX0W4Qmf3tm9vh9ZeYhsJ8gK74O4bri06wBoi6+XbqFxCCAdJsCETu1doggAg==","signature_status":"signed_v1","signed_at":"2026-05-18T00:20:19.101382Z","signed_message":"canonical_sha256_bytes"},"source_id":"1803.08610","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd1480e0a0fd534bf3dbd7d839bce0693379aba7f4974032960ac8365885f9ed","sha256:6373c94dc654938f7397a9b004131b89df77d4a8a5093b8f60569f84cc925f7f"],"state_sha256":"10e907155751d9d21a65557272cf9183508ec08349911f0e74384e32c4b55b8c"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"tGod87rIDC7StZ+SlGz955fZ6hPpZYc82bi6c0uepu8U/kW1+Atex6bJYPa8/cKA2DACH71rvnnm2GqZUaBfDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T00:46:12.512684Z","bundle_sha256":"7523984e5850a1b902fb45ab92db7b98d8b411f827ea1f787b49cc04b8476cb8"}}