{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:BYGTKXXMNWHKIEXSPOYDSJCOPY","short_pith_number":"pith:BYGTKXXM","canonical_record":{"source":{"id":"2304.02056","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2023-04-04T18:07:53Z","cross_cats_sorted":[],"title_canon_sha256":"70c10871c257043acb1c6e10e515fb75067d6f3d8c1c6ce0a381899458037ec9","abstract_canon_sha256":"262ce46344bb8eb3c9a1bef0d4530999fcd68683ef2c0b782d63e9e83b94b8cd"},"schema_version":"1.0"},"canonical_sha256":"0e0d355eec6d8ea412f27bb039244e7e11bdae600723bd0515be91f5bf1ae2da","source":{"kind":"arxiv","id":"2304.02056","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2304.02056","created_at":"2026-07-05T05:58:21Z"},{"alias_kind":"arxiv_version","alias_value":"2304.02056v1","created_at":"2026-07-05T05:58:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2304.02056","created_at":"2026-07-05T05:58:21Z"},{"alias_kind":"pith_short_12","alias_value":"BYGTKXXMNWHK","created_at":"2026-07-05T05:58:21Z"},{"alias_kind":"pith_short_16","alias_value":"BYGTKXXMNWHKIEXS","created_at":"2026-07-05T05:58:21Z"},{"alias_kind":"pith_short_8","alias_value":"BYGTKXXM","created_at":"2026-07-05T05:58:21Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:BYGTKXXMNWHKIEXSPOYDSJCOPY","target":"record","payload":{"canonical_record":{"source":{"id":"2304.02056","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2023-04-04T18:07:53Z","cross_cats_sorted":[],"title_canon_sha256":"70c10871c257043acb1c6e10e515fb75067d6f3d8c1c6ce0a381899458037ec9","abstract_canon_sha256":"262ce46344bb8eb3c9a1bef0d4530999fcd68683ef2c0b782d63e9e83b94b8cd"},"schema_version":"1.0"},"canonical_sha256":"0e0d355eec6d8ea412f27bb039244e7e11bdae600723bd0515be91f5bf1ae2da","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:58:21.478067Z","signature_b64":"x24J9qISeBdwuuEjkhIcvmDSlLHyyD0/+yHdcwJm5PuclP3Kwldg1hJ8wWLASP7r/b8UCd7aAp/sUvvfRRJhAw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"0e0d355eec6d8ea412f27bb039244e7e11bdae600723bd0515be91f5bf1ae2da","last_reissued_at":"2026-07-05T05:58:21.477585Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:58:21.477585Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2304.02056","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":"2026-07-05T05:58:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Ba0FOLFLS/1AovQL2U5mBF/fmdN9wYzvY/Px3neUiKm28mBVKGvC4ShPagC4SBNOWFdCVHxGIl1DLyE/wLMBDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T20:37:59.334272Z"},"content_sha256":"a05d2acf4d7e0665a2f9183e14f5fa1d2b708a5d88ba162628ea0c0305a6688e","schema_version":"1.0","event_id":"sha256:a05d2acf4d7e0665a2f9183e14f5fa1d2b708a5d88ba162628ea0c0305a6688e"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:BYGTKXXMNWHKIEXSPOYDSJCOPY","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimal operating MR contrast for brain ventricle parcellation","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"eess.IV","authors_text":"Aaron Carass, Jerry L. Prince, Lianrui Zuo, Mark G. Luciano, Savannah P. Hays, Yuli Wang","submitted_at":"2023-04-04T18:07:53Z","abstract_excerpt":"Development of MR harmonization has enabled different contrast MRIs to be synthesized while preserving the underlying anatomy. In this paper, we use image harmonization to explore the impact of different T1-w MR contrasts on a state-of-the-art ventricle parcellation algorithm VParNet. We identify an optimal operating contrast (OOC) for ventricle parcellation; by showing that the performance of a pretrained VParNet can be boosted by adjusting contrast to the OOC."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2304.02056","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2304.02056/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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":"2026-07-05T05:58:21Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0lmW60JOP/Mo/q7aBjqHEGMS1CMi/KSYseepOP7dOJkItL00VytBpmS9UdMmXXPwOCaWoDsCjPinSoI+9dmMCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-06T20:37:59.334656Z"},"content_sha256":"fdc582ce4e84558352e67116cded08a77716a9cb2008fa318caa28454ca90207","schema_version":"1.0","event_id":"sha256:fdc582ce4e84558352e67116cded08a77716a9cb2008fa318caa28454ca90207"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/BYGTKXXMNWHKIEXSPOYDSJCOPY/bundle.json","state_url":"https://pith.science/pith/BYGTKXXMNWHKIEXSPOYDSJCOPY/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/BYGTKXXMNWHKIEXSPOYDSJCOPY/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":"2026-07-06T20:37:59Z","links":{"resolver":"https://pith.science/pith/BYGTKXXMNWHKIEXSPOYDSJCOPY","bundle":"https://pith.science/pith/BYGTKXXMNWHKIEXSPOYDSJCOPY/bundle.json","state":"https://pith.science/pith/BYGTKXXMNWHKIEXSPOYDSJCOPY/state.json","well_known_bundle":"https://pith.science/.well-known/pith/BYGTKXXMNWHKIEXSPOYDSJCOPY/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:BYGTKXXMNWHKIEXSPOYDSJCOPY","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":"262ce46344bb8eb3c9a1bef0d4530999fcd68683ef2c0b782d63e9e83b94b8cd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2023-04-04T18:07:53Z","title_canon_sha256":"70c10871c257043acb1c6e10e515fb75067d6f3d8c1c6ce0a381899458037ec9"},"schema_version":"1.0","source":{"id":"2304.02056","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2304.02056","created_at":"2026-07-05T05:58:21Z"},{"alias_kind":"arxiv_version","alias_value":"2304.02056v1","created_at":"2026-07-05T05:58:21Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2304.02056","created_at":"2026-07-05T05:58:21Z"},{"alias_kind":"pith_short_12","alias_value":"BYGTKXXMNWHK","created_at":"2026-07-05T05:58:21Z"},{"alias_kind":"pith_short_16","alias_value":"BYGTKXXMNWHKIEXS","created_at":"2026-07-05T05:58:21Z"},{"alias_kind":"pith_short_8","alias_value":"BYGTKXXM","created_at":"2026-07-05T05:58:21Z"}],"graph_snapshots":[{"event_id":"sha256:fdc582ce4e84558352e67116cded08a77716a9cb2008fa318caa28454ca90207","target":"graph","created_at":"2026-07-05T05:58:21Z","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/2304.02056/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Development of MR harmonization has enabled different contrast MRIs to be synthesized while preserving the underlying anatomy. In this paper, we use image harmonization to explore the impact of different T1-w MR contrasts on a state-of-the-art ventricle parcellation algorithm VParNet. We identify an optimal operating contrast (OOC) for ventricle parcellation; by showing that the performance of a pretrained VParNet can be boosted by adjusting contrast to the OOC.","authors_text":"Aaron Carass, Jerry L. Prince, Lianrui Zuo, Mark G. Luciano, Savannah P. Hays, Yuli Wang","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2023-04-04T18:07:53Z","title":"Optimal operating MR contrast for brain ventricle parcellation"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2304.02056","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:a05d2acf4d7e0665a2f9183e14f5fa1d2b708a5d88ba162628ea0c0305a6688e","target":"record","created_at":"2026-07-05T05:58:21Z","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":"262ce46344bb8eb3c9a1bef0d4530999fcd68683ef2c0b782d63e9e83b94b8cd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2023-04-04T18:07:53Z","title_canon_sha256":"70c10871c257043acb1c6e10e515fb75067d6f3d8c1c6ce0a381899458037ec9"},"schema_version":"1.0","source":{"id":"2304.02056","kind":"arxiv","version":1}},"canonical_sha256":"0e0d355eec6d8ea412f27bb039244e7e11bdae600723bd0515be91f5bf1ae2da","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"0e0d355eec6d8ea412f27bb039244e7e11bdae600723bd0515be91f5bf1ae2da","first_computed_at":"2026-07-05T05:58:21.477585Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:58:21.477585Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"x24J9qISeBdwuuEjkhIcvmDSlLHyyD0/+yHdcwJm5PuclP3Kwldg1hJ8wWLASP7r/b8UCd7aAp/sUvvfRRJhAw==","signature_status":"signed_v1","signed_at":"2026-07-05T05:58:21.478067Z","signed_message":"canonical_sha256_bytes"},"source_id":"2304.02056","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:a05d2acf4d7e0665a2f9183e14f5fa1d2b708a5d88ba162628ea0c0305a6688e","sha256:fdc582ce4e84558352e67116cded08a77716a9cb2008fa318caa28454ca90207"],"state_sha256":"0aacd8648113c219f8db444bd0d82f9112317c1252dd1b46baa7028ef91af2a5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"kaHRpjvOr0XkHdWn2NJ/EjZnDS4TszrCdoVNTaPqtA8P2zR5inLqd6ecIwaK2rjmZb538gH1cn25GgGKGw+mBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-06T20:37:59.336600Z","bundle_sha256":"07f9e0c2cff19353f9d39065f0bc5171b71ca89ae7b209d215ecc49dc3f36d6f"}}