{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:XZWFRT4RHP6M7TNUGIKO4UIMQJ","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":"7159f4e1a325ead47142f269d4eb748efcb5118818261b52bcd5b0ec99a2f644","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-05-22T15:45:50Z","title_canon_sha256":"89faabee526fe35db76df65a30fec40ae5b31ea320b9151147cb190f38519e58"},"schema_version":"1.0","source":{"id":"1905.09282","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1905.09282","created_at":"2026-05-17T23:45:19Z"},{"alias_kind":"arxiv_version","alias_value":"1905.09282v1","created_at":"2026-05-17T23:45:19Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1905.09282","created_at":"2026-05-17T23:45:19Z"},{"alias_kind":"pith_short_12","alias_value":"XZWFRT4RHP6M","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_16","alias_value":"XZWFRT4RHP6M7TNU","created_at":"2026-05-18T12:33:33Z"},{"alias_kind":"pith_short_8","alias_value":"XZWFRT4R","created_at":"2026-05-18T12:33:33Z"}],"graph_snapshots":[{"event_id":"sha256:f058b6c95e9f580d37042159828b74197a6b90f0ff869d19715977f6c92d8814","target":"graph","created_at":"2026-05-17T23:45:19Z","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":"Purpose. Precise placement of needles is a challenge in a number of clinical applications such as brachytherapy or biopsy. Forces acting at the needle cause tissue deformation and needle deflection which in turn may lead to misplacement or injury. Hence, a number of approaches to estimate the forces at the needle have been proposed. Yet, integrating sensors into the needle tip is challenging and a careful calibration is required to obtain good force estimates.\n  Methods. We describe a fiber-optical needle tip force sensor design using a single OCT fiber for measurement. The fiber images the de","authors_text":"Alexander Schlaefer, Christoph Otte, David Meyer, Klaus-Peter J\\\"unemann, Moritz Franz Hamann, Nils Gessert, Sven-Thomas Antoni, Thore Saathoff, Torben Priegnitz","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-05-22T15:45:50Z","title":"Spatio-Temporal Deep Learning Models for Tip Force Estimation During Needle Insertion"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1905.09282","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":"sha256:9238e005044b27300397c91acbad4ad63ab58d238785079426e64f946d39602c","target":"record","created_at":"2026-05-17T23:45:19Z","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":"7159f4e1a325ead47142f269d4eb748efcb5118818261b52bcd5b0ec99a2f644","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-05-22T15:45:50Z","title_canon_sha256":"89faabee526fe35db76df65a30fec40ae5b31ea320b9151147cb190f38519e58"},"schema_version":"1.0","source":{"id":"1905.09282","kind":"arxiv","version":1}},"canonical_sha256":"be6c58cf913bfccfcdb43214ee510c8270a22f57f4ba65056fef0c16e0d605a9","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"be6c58cf913bfccfcdb43214ee510c8270a22f57f4ba65056fef0c16e0d605a9","first_computed_at":"2026-05-17T23:45:19.693751Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:45:19.693751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Ecj968O/OB+5jP8VEdT2I2i9MkGBbc+xTumCqksEHibpqon6l+UaIobbPjC4Bzvm8K5Oa/C96gENDDz2hzHoCw==","signature_status":"signed_v1","signed_at":"2026-05-17T23:45:19.694506Z","signed_message":"canonical_sha256_bytes"},"source_id":"1905.09282","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9238e005044b27300397c91acbad4ad63ab58d238785079426e64f946d39602c","sha256:f058b6c95e9f580d37042159828b74197a6b90f0ff869d19715977f6c92d8814"],"state_sha256":"c8cabd8d55140192f98b8446a983dbf47635f1ac13ccbf42803f9f40a136bf2d"}