{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:FZTIBBLRXDRJMKQKALWNTEI35F","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":"bd8695883c53179b685f16b92792af2259b1e58b86d5500e16bcfaf3510c4921","cross_cats_sorted":["cs.CV","eess.IV"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2022-02-16T01:59:33Z","title_canon_sha256":"b37725e8b8f596700f67476e22798f1766c8f88fab9b146725f166da8e56b70c"},"schema_version":"1.0","source":{"id":"2202.07823","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.07823","created_at":"2026-07-05T03:57:34Z"},{"alias_kind":"arxiv_version","alias_value":"2202.07823v1","created_at":"2026-07-05T03:57:34Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.07823","created_at":"2026-07-05T03:57:34Z"},{"alias_kind":"pith_short_12","alias_value":"FZTIBBLRXDRJ","created_at":"2026-07-05T03:57:34Z"},{"alias_kind":"pith_short_16","alias_value":"FZTIBBLRXDRJMKQK","created_at":"2026-07-05T03:57:34Z"},{"alias_kind":"pith_short_8","alias_value":"FZTIBBLR","created_at":"2026-07-05T03:57:34Z"}],"graph_snapshots":[{"event_id":"sha256:01cb0009295d8181abda7841f282877bcd1aba6b9265958e111016e3e0f8f6c9","target":"graph","created_at":"2026-07-05T03:57:34Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2202.07823/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We utilized a 3D nnU-Net model with residual layers supplemented by squeeze and excitation (SE) normalization for tumor segmentation from PET/CT images provided by the Head and Neck Tumor segmentation chal-lenge (HECKTOR). Our proposed loss function incorporates the Unified Fo-cal and Mumford-Shah losses to take the advantage of distribution, region, and boundary-based loss functions. The results of leave-one-out-center-cross-validation performed on different centers showed a segmentation performance of 0.82 average Dice score (DSC) and 3.16 median Hausdorff Distance (HD), and our results on t","authors_text":"Arman Rahmim, Calum MacAulay, Chloe Hill, Fereshteh Yousefirizi, Ian Janzen, Natalia Dubljevic, Yueh-En Liu","cross_cats":["cs.CV","eess.IV"],"headline":"","license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2022-02-16T01:59:33Z","title":"Segmentation and Risk Score Prediction of Head and Neck Cancers in PET/CT Volumes with 3D U-Net and Cox Proportional Hazard Neural Networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.07823","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:d00a96957c81b72d801770b83c5e7f376ed79f656e51065449184cb502681178","target":"record","created_at":"2026-07-05T03:57:34Z","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":"bd8695883c53179b685f16b92792af2259b1e58b86d5500e16bcfaf3510c4921","cross_cats_sorted":["cs.CV","eess.IV"],"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2022-02-16T01:59:33Z","title_canon_sha256":"b37725e8b8f596700f67476e22798f1766c8f88fab9b146725f166da8e56b70c"},"schema_version":"1.0","source":{"id":"2202.07823","kind":"arxiv","version":1}},"canonical_sha256":"2e66808571b8e2962a0a02ecd9911be96e31f9fe41f3054706fa18f61261bed3","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e66808571b8e2962a0a02ecd9911be96e31f9fe41f3054706fa18f61261bed3","first_computed_at":"2026-07-05T03:57:34.035343Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T03:57:34.035343Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"RPp9ZLoteV1jtV8+CW3b+RuayT6Z4Pf4ElCaJchiAo4jgxKnLQVUTmbHOOECC5Ax1U92agyhC7CToYsf4V+uAg==","signature_status":"signed_v1","signed_at":"2026-07-05T03:57:34.035909Z","signed_message":"canonical_sha256_bytes"},"source_id":"2202.07823","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d00a96957c81b72d801770b83c5e7f376ed79f656e51065449184cb502681178","sha256:01cb0009295d8181abda7841f282877bcd1aba6b9265958e111016e3e0f8f6c9"],"state_sha256":"a128da3742f07f235ee6e623a28e82a3e554d9e467f8c5db6623713026247051"}