{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:5QEBFSOW5S34SOW32VSXHMWIF3","short_pith_number":"pith:5QEBFSOW","canonical_record":{"source":{"id":"2303.08189","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2023-03-14T19:24:23Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"16225e015fd8075446d3fa5091464638ff7df51023fdccc9b7454954d7b3c236","abstract_canon_sha256":"88cba3fc31a56736df923e9623aa1a69e8e1bae285cb4115303cce52b8752e00"},"schema_version":"1.0"},"canonical_sha256":"ec0812c9d6ecb7c93adbd56573b2c82ee8c4987d5cca78383f5db072c2b23a4a","source":{"kind":"arxiv","id":"2303.08189","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.08189","created_at":"2026-07-05T05:51:17Z"},{"alias_kind":"arxiv_version","alias_value":"2303.08189v1","created_at":"2026-07-05T05:51:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.08189","created_at":"2026-07-05T05:51:17Z"},{"alias_kind":"pith_short_12","alias_value":"5QEBFSOW5S34","created_at":"2026-07-05T05:51:17Z"},{"alias_kind":"pith_short_16","alias_value":"5QEBFSOW5S34SOW3","created_at":"2026-07-05T05:51:17Z"},{"alias_kind":"pith_short_8","alias_value":"5QEBFSOW","created_at":"2026-07-05T05:51:17Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:5QEBFSOW5S34SOW32VSXHMWIF3","target":"record","payload":{"canonical_record":{"source":{"id":"2303.08189","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2023-03-14T19:24:23Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"16225e015fd8075446d3fa5091464638ff7df51023fdccc9b7454954d7b3c236","abstract_canon_sha256":"88cba3fc31a56736df923e9623aa1a69e8e1bae285cb4115303cce52b8752e00"},"schema_version":"1.0"},"canonical_sha256":"ec0812c9d6ecb7c93adbd56573b2c82ee8c4987d5cca78383f5db072c2b23a4a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:51:17.005179Z","signature_b64":"EfJA7BdXnaOmgZG3fjROPIf0X4B2xmLnl2W+jMomFDLgvZoqeexK4U3v8ssaYbCQg2n2kB43FMoprg/hw9lyCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"ec0812c9d6ecb7c93adbd56573b2c82ee8c4987d5cca78383f5db072c2b23a4a","last_reissued_at":"2026-07-05T05:51:17.004721Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:51:17.004721Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2303.08189","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":"2026-07-05T05:51:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"oRMpUAqDj3pnlJ7NTmQFZW75sM+F616LGsfU7PwKyNxEv8PMeCDJpF6mmilAFHIXcufodUfnl+bvuoYcl3mbAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T14:38:34.394049Z"},"content_sha256":"1762897a89048be8cea585980739254b6f92ecd4dd4da8f56243c322f6bb3ad0","schema_version":"1.0","event_id":"sha256:1762897a89048be8cea585980739254b6f92ecd4dd4da8f56243c322f6bb3ad0"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:5QEBFSOW5S34SOW32VSXHMWIF3","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Diffusion Models for Contrast Harmonization of Magnetic Resonance Images","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"eess.IV","authors_text":"Alicia Durrer, Cristina Granziera, Florentin Bieder, Julia Wolleb, Matthias Weigel, \\\"Ozg\\\"ur Yaldizli, Philippe C. Cattin, Robin Sandk\\\"uhler, Tim Sinnecker","submitted_at":"2023-03-14T19:24:23Z","abstract_excerpt":"Magnetic resonance (MR) images from multiple sources often show differences in image contrast related to acquisition settings or the used scanner type. For long-term studies, longitudinal comparability is essential but can be impaired by these contrast differences, leading to biased results when using automated evaluation tools. This study presents a diffusion model-based approach for contrast harmonization. We use a data set consisting of scans of 18 Multiple Sclerosis patients and 22 healthy controls. Each subject was scanned in two MR scanners of different magnetic field strengths (1.5 T an"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.08189","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/2303.08189/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":"2026-07-05T05:51:17Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ueJ6OZl1tRdR+hB+9i5yI+iBowXvJb4i3VTBa7e6sCKzRw+Hmxdy2g/oCCOtPX/O1CZgpkGbiO5Q/626iYvCAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-05T14:38:34.394720Z"},"content_sha256":"528f91336329cc139e644f977257548ab78b05a7f5cef83e0bf0225c76a01197","schema_version":"1.0","event_id":"sha256:528f91336329cc139e644f977257548ab78b05a7f5cef83e0bf0225c76a01197"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/5QEBFSOW5S34SOW32VSXHMWIF3/bundle.json","state_url":"https://pith.science/pith/5QEBFSOW5S34SOW32VSXHMWIF3/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/5QEBFSOW5S34SOW32VSXHMWIF3/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":"2026-07-05T14:38:34Z","links":{"resolver":"https://pith.science/pith/5QEBFSOW5S34SOW32VSXHMWIF3","bundle":"https://pith.science/pith/5QEBFSOW5S34SOW32VSXHMWIF3/bundle.json","state":"https://pith.science/pith/5QEBFSOW5S34SOW32VSXHMWIF3/state.json","well_known_bundle":"https://pith.science/.well-known/pith/5QEBFSOW5S34SOW32VSXHMWIF3/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:5QEBFSOW5S34SOW32VSXHMWIF3","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":"88cba3fc31a56736df923e9623aa1a69e8e1bae285cb4115303cce52b8752e00","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2023-03-14T19:24:23Z","title_canon_sha256":"16225e015fd8075446d3fa5091464638ff7df51023fdccc9b7454954d7b3c236"},"schema_version":"1.0","source":{"id":"2303.08189","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2303.08189","created_at":"2026-07-05T05:51:17Z"},{"alias_kind":"arxiv_version","alias_value":"2303.08189v1","created_at":"2026-07-05T05:51:17Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2303.08189","created_at":"2026-07-05T05:51:17Z"},{"alias_kind":"pith_short_12","alias_value":"5QEBFSOW5S34","created_at":"2026-07-05T05:51:17Z"},{"alias_kind":"pith_short_16","alias_value":"5QEBFSOW5S34SOW3","created_at":"2026-07-05T05:51:17Z"},{"alias_kind":"pith_short_8","alias_value":"5QEBFSOW","created_at":"2026-07-05T05:51:17Z"}],"graph_snapshots":[{"event_id":"sha256:528f91336329cc139e644f977257548ab78b05a7f5cef83e0bf0225c76a01197","target":"graph","created_at":"2026-07-05T05:51:17Z","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/2303.08189/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Magnetic resonance (MR) images from multiple sources often show differences in image contrast related to acquisition settings or the used scanner type. For long-term studies, longitudinal comparability is essential but can be impaired by these contrast differences, leading to biased results when using automated evaluation tools. This study presents a diffusion model-based approach for contrast harmonization. We use a data set consisting of scans of 18 Multiple Sclerosis patients and 22 healthy controls. Each subject was scanned in two MR scanners of different magnetic field strengths (1.5 T an","authors_text":"Alicia Durrer, Cristina Granziera, Florentin Bieder, Julia Wolleb, Matthias Weigel, \\\"Ozg\\\"ur Yaldizli, Philippe C. Cattin, Robin Sandk\\\"uhler, Tim Sinnecker","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2023-03-14T19:24:23Z","title":"Diffusion Models for Contrast Harmonization of Magnetic Resonance Images"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2303.08189","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":"sha256:1762897a89048be8cea585980739254b6f92ecd4dd4da8f56243c322f6bb3ad0","target":"record","created_at":"2026-07-05T05:51:17Z","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":"88cba3fc31a56736df923e9623aa1a69e8e1bae285cb4115303cce52b8752e00","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2023-03-14T19:24:23Z","title_canon_sha256":"16225e015fd8075446d3fa5091464638ff7df51023fdccc9b7454954d7b3c236"},"schema_version":"1.0","source":{"id":"2303.08189","kind":"arxiv","version":1}},"canonical_sha256":"ec0812c9d6ecb7c93adbd56573b2c82ee8c4987d5cca78383f5db072c2b23a4a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"ec0812c9d6ecb7c93adbd56573b2c82ee8c4987d5cca78383f5db072c2b23a4a","first_computed_at":"2026-07-05T05:51:17.004721Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:51:17.004721Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"EfJA7BdXnaOmgZG3fjROPIf0X4B2xmLnl2W+jMomFDLgvZoqeexK4U3v8ssaYbCQg2n2kB43FMoprg/hw9lyCA==","signature_status":"signed_v1","signed_at":"2026-07-05T05:51:17.005179Z","signed_message":"canonical_sha256_bytes"},"source_id":"2303.08189","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:1762897a89048be8cea585980739254b6f92ecd4dd4da8f56243c322f6bb3ad0","sha256:528f91336329cc139e644f977257548ab78b05a7f5cef83e0bf0225c76a01197"],"state_sha256":"983a2776977b3c8aad540d14d22f07646da5a0210891ce0b22a1f338598e0c7b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9Ag7YSA9SNzrBts03ethPrHgZhCASMCVIAEXI5aJWrdMErchb9oBMlh9vai+FIeZ7mIK7XTsnPjYtbTVsSJJCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-05T14:38:34.398233Z","bundle_sha256":"556af553a4b9a9b9262d7101cd6d84c54c69580df28dc86bbff367a017c22fef"}}