{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:HIDBGSYCEHLZFNPHB4BCC3RSSA","short_pith_number":"pith:HIDBGSYC","canonical_record":{"source":{"id":"2608.08693","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-08-09T13:13:54Z","cross_cats_sorted":[],"title_canon_sha256":"9726a2f24e67c8d22d0cb055fa9fe4bc3d5a530925ac96d7424dbd5438c0c4a7","abstract_canon_sha256":"1e9ab6ffd2793d8fe4d3e6ccb672c1413e8bdb7b88c76949acf99a5ccd397efd"},"schema_version":"1.0"},"canonical_sha256":"3a06134b0221d792b5e70f02216e3290208069617885ca58d42e4570cf1c5062","source":{"kind":"arxiv","id":"2608.08693","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.08693","created_at":"2026-08-11T01:25:03Z"},{"alias_kind":"arxiv_version","alias_value":"2608.08693v1","created_at":"2026-08-11T01:25:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.08693","created_at":"2026-08-11T01:25:03Z"},{"alias_kind":"pith_short_12","alias_value":"HIDBGSYCEHLZ","created_at":"2026-08-11T01:25:03Z"},{"alias_kind":"pith_short_16","alias_value":"HIDBGSYCEHLZFNPH","created_at":"2026-08-11T01:25:03Z"},{"alias_kind":"pith_short_8","alias_value":"HIDBGSYC","created_at":"2026-08-11T01:25:03Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:HIDBGSYCEHLZFNPHB4BCC3RSSA","target":"record","payload":{"canonical_record":{"source":{"id":"2608.08693","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-08-09T13:13:54Z","cross_cats_sorted":[],"title_canon_sha256":"9726a2f24e67c8d22d0cb055fa9fe4bc3d5a530925ac96d7424dbd5438c0c4a7","abstract_canon_sha256":"1e9ab6ffd2793d8fe4d3e6ccb672c1413e8bdb7b88c76949acf99a5ccd397efd"},"schema_version":"1.0"},"canonical_sha256":"3a06134b0221d792b5e70f02216e3290208069617885ca58d42e4570cf1c5062","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-08-11T01:25:03.330330Z","signature_b64":"HapWwuX0FwNKeRRXJWt7hGFYherlyeOQdAFKo+D5NSgxsPV9OjbfOdztQ7RyMUCwf3NvISVVBsiMqlmIi0Z6Ag==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3a06134b0221d792b5e70f02216e3290208069617885ca58d42e4570cf1c5062","last_reissued_at":"2026-08-11T01:25:03.327259Z","signature_status":"signed_v1","first_computed_at":"2026-08-11T01:25:03.327259Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2608.08693","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":"2026-08-11T01:25:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"uVbhu+Q4+Sdq92OwuZMMu7ZHZdK6pN+/oEmZa3B6Rq8HR0GTEdBk5RCcpx71cpm/r8xAC03AZqIzgFM1idFjDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T21:55:16.625074Z"},"content_sha256":"eb3a68f6c7cc5883d724d0e745adc182030ace06a17f7988784027da3dc5b558","schema_version":"1.0","event_id":"sha256:eb3a68f6c7cc5883d724d0e745adc182030ace06a17f7988784027da3dc5b558"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:HIDBGSYCEHLZFNPHB4BCC3RSSA","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"CUPA-T2*: Covariance-Aware Uncertainty Propagation and Alignment for T2* Mapping in Accelerated MRI","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Christine Preibisch, Dirk H. J. Poot, Gideon N. L. Rouwendaal, Hannah Eichhorn, Julia A. Schnabel, Natascha Niessen","submitted_at":"2026-08-09T13:13:54Z","abstract_excerpt":"Quantitative T2* maps have strong potential for biomarker discovery but are limited by long scan times, rendering them impractical in clinical settings. Significant acceleration can be achieved through undersampling in k-space combined with learning-based reconstruction. However, reconstruction artifacts and noise can propagate into downstream T2* fitting, degrading its accuracy. We introduce CUPA-T2*, a framework that explicitly propagates voxel-wise inter-echo uncertainty from stochastic Monte Carlo dropout reconstructions to downstream T2* fitting via covariance-aware sampling. T2* fitting "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.08693","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/2608.08693/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":"2026-08-11T01:25:03Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"ZLgOqQSjV/K4PKWs9nm1R1u1qTuo5juJE+NK4oCCuDvW3Ewf26SGTYOZ+hzYN1DaZkTDfnQbxeqdNks8ZKRIDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-14T21:55:16.625719Z"},"content_sha256":"68279a0a52089f11caf9ede6a799f84e3d39e57354ae8a34eeba812118a0d2ee","schema_version":"1.0","event_id":"sha256:68279a0a52089f11caf9ede6a799f84e3d39e57354ae8a34eeba812118a0d2ee"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HIDBGSYCEHLZFNPHB4BCC3RSSA/bundle.json","state_url":"https://pith.science/pith/HIDBGSYCEHLZFNPHB4BCC3RSSA/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HIDBGSYCEHLZFNPHB4BCC3RSSA/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":"2026-08-14T21:55:16Z","links":{"resolver":"https://pith.science/pith/HIDBGSYCEHLZFNPHB4BCC3RSSA","bundle":"https://pith.science/pith/HIDBGSYCEHLZFNPHB4BCC3RSSA/bundle.json","state":"https://pith.science/pith/HIDBGSYCEHLZFNPHB4BCC3RSSA/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HIDBGSYCEHLZFNPHB4BCC3RSSA/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:HIDBGSYCEHLZFNPHB4BCC3RSSA","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":"1e9ab6ffd2793d8fe4d3e6ccb672c1413e8bdb7b88c76949acf99a5ccd397efd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-08-09T13:13:54Z","title_canon_sha256":"9726a2f24e67c8d22d0cb055fa9fe4bc3d5a530925ac96d7424dbd5438c0c4a7"},"schema_version":"1.0","source":{"id":"2608.08693","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2608.08693","created_at":"2026-08-11T01:25:03Z"},{"alias_kind":"arxiv_version","alias_value":"2608.08693v1","created_at":"2026-08-11T01:25:03Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2608.08693","created_at":"2026-08-11T01:25:03Z"},{"alias_kind":"pith_short_12","alias_value":"HIDBGSYCEHLZ","created_at":"2026-08-11T01:25:03Z"},{"alias_kind":"pith_short_16","alias_value":"HIDBGSYCEHLZFNPH","created_at":"2026-08-11T01:25:03Z"},{"alias_kind":"pith_short_8","alias_value":"HIDBGSYC","created_at":"2026-08-11T01:25:03Z"}],"graph_snapshots":[{"event_id":"sha256:68279a0a52089f11caf9ede6a799f84e3d39e57354ae8a34eeba812118a0d2ee","target":"graph","created_at":"2026-08-11T01:25:03Z","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/2608.08693/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Quantitative T2* maps have strong potential for biomarker discovery but are limited by long scan times, rendering them impractical in clinical settings. Significant acceleration can be achieved through undersampling in k-space combined with learning-based reconstruction. However, reconstruction artifacts and noise can propagate into downstream T2* fitting, degrading its accuracy. We introduce CUPA-T2*, a framework that explicitly propagates voxel-wise inter-echo uncertainty from stochastic Monte Carlo dropout reconstructions to downstream T2* fitting via covariance-aware sampling. T2* fitting ","authors_text":"Christine Preibisch, Dirk H. J. Poot, Gideon N. L. Rouwendaal, Hannah Eichhorn, Julia A. Schnabel, Natascha Niessen","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-08-09T13:13:54Z","title":"CUPA-T2*: Covariance-Aware Uncertainty Propagation and Alignment for T2* Mapping in Accelerated MRI"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.08693","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:eb3a68f6c7cc5883d724d0e745adc182030ace06a17f7988784027da3dc5b558","target":"record","created_at":"2026-08-11T01:25:03Z","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":"1e9ab6ffd2793d8fe4d3e6ccb672c1413e8bdb7b88c76949acf99a5ccd397efd","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2026-08-09T13:13:54Z","title_canon_sha256":"9726a2f24e67c8d22d0cb055fa9fe4bc3d5a530925ac96d7424dbd5438c0c4a7"},"schema_version":"1.0","source":{"id":"2608.08693","kind":"arxiv","version":1}},"canonical_sha256":"3a06134b0221d792b5e70f02216e3290208069617885ca58d42e4570cf1c5062","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3a06134b0221d792b5e70f02216e3290208069617885ca58d42e4570cf1c5062","first_computed_at":"2026-08-11T01:25:03.327259Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-08-11T01:25:03.327259Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"HapWwuX0FwNKeRRXJWt7hGFYherlyeOQdAFKo+D5NSgxsPV9OjbfOdztQ7RyMUCwf3NvISVVBsiMqlmIi0Z6Ag==","signature_status":"signed_v1","signed_at":"2026-08-11T01:25:03.330330Z","signed_message":"canonical_sha256_bytes"},"source_id":"2608.08693","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:eb3a68f6c7cc5883d724d0e745adc182030ace06a17f7988784027da3dc5b558","sha256:68279a0a52089f11caf9ede6a799f84e3d39e57354ae8a34eeba812118a0d2ee"],"state_sha256":"6cdbd23330659b516eb3e0f2c73202c95a6c0bb2ef17f88f241275f85b1874f7"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6SsR2QhBuFGQVhTqOSNHmgZlUpl/u38kOeq3+NnZ/g4zf7wa/S/Y40x5aUR9gy3q2ajeqHihsJCduKVANLUBDg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-14T21:55:16.630331Z","bundle_sha256":"2c12829117f4fa8e267e7ceafc1da28b7f8ce36deb77663176186a0223859088"}}