{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2026:VLCG6XSAQGKOEU6CL3KT25N7NI","short_pith_number":"pith:VLCG6XSA","canonical_record":{"source":{"id":"2607.03299","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2026-07-03T13:09:54Z","cross_cats_sorted":["cs.CV","cs.LG"],"title_canon_sha256":"9d206824806b52fadd4bac813457b32fc04aa0630be81feb04b04f36b96d39bc","abstract_canon_sha256":"608c505ac260dcc5c6e2a04513ef5c475fe3ed84fb02224d3984bfef27f397a5"},"schema_version":"1.0"},"canonical_sha256":"aac46f5e408194e253c25ed53d75bf6a12f87197f50ed9b2bbb99144a4757fae","source":{"kind":"arxiv","id":"2607.03299","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.03299","created_at":"2026-07-07T02:17:36Z"},{"alias_kind":"arxiv_version","alias_value":"2607.03299v1","created_at":"2026-07-07T02:17:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.03299","created_at":"2026-07-07T02:17:36Z"},{"alias_kind":"pith_short_12","alias_value":"VLCG6XSAQGKO","created_at":"2026-07-07T02:17:36Z"},{"alias_kind":"pith_short_16","alias_value":"VLCG6XSAQGKOEU6C","created_at":"2026-07-07T02:17:36Z"},{"alias_kind":"pith_short_8","alias_value":"VLCG6XSA","created_at":"2026-07-07T02:17:36Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2026:VLCG6XSAQGKOEU6CL3KT25N7NI","target":"record","payload":{"canonical_record":{"source":{"id":"2607.03299","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2026-07-03T13:09:54Z","cross_cats_sorted":["cs.CV","cs.LG"],"title_canon_sha256":"9d206824806b52fadd4bac813457b32fc04aa0630be81feb04b04f36b96d39bc","abstract_canon_sha256":"608c505ac260dcc5c6e2a04513ef5c475fe3ed84fb02224d3984bfef27f397a5"},"schema_version":"1.0"},"canonical_sha256":"aac46f5e408194e253c25ed53d75bf6a12f87197f50ed9b2bbb99144a4757fae","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-07T02:17:36.167133Z","signature_b64":"mGjKRo6oa5TL54yN9QF2yg/VlTmAHwtXK46hvHT9do/Koy/SwYg+O/SkaMTHkD4IVkJfUyC/wl8D5oz7bdfnAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"aac46f5e408194e253c25ed53d75bf6a12f87197f50ed9b2bbb99144a4757fae","last_reissued_at":"2026-07-07T02:17:36.166134Z","signature_status":"signed_v1","first_computed_at":"2026-07-07T02:17:36.166134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2607.03299","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":"2026-07-07T02:17:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BZK+1HuVDPqSt2kkplCrowdSjC61mkIeKPoDwQbHRNfJ2KEeJDV6AzMT0BIgfPKZgEVWv+X7xnOqyMQ1Mn8FCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T14:08:38.004959Z"},"content_sha256":"056a8726c7f7bd60ec9da58ae569d13621a6d3253062cece47568491cc08aee9","schema_version":"1.0","event_id":"sha256:056a8726c7f7bd60ec9da58ae569d13621a6d3253062cece47568491cc08aee9"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2026:VLCG6XSAQGKOEU6CL3KT25N7NI","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Piecewise Dynamic Diffusion Regularization for Reconstruction of Cardiac Cine MRI","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV","cs.LG"],"primary_cat":"eess.IV","authors_text":"Florian F\\\"urnrohr, Reinhard Heckel","submitted_at":"2026-07-03T13:09:54Z","abstract_excerpt":"Real-time cardiac cine MRI enables visualization of the beating heart during free breathing, but severe undersampling and motion make reconstruction highly challenging. A central challenge for reconstruction is incorporating powerful priors of cardiac anatomy while remaining computationally efficient. We propose Piecewise Dynamic Diffusion Regularization (PDDR), a reconstruction method that integrates a spatiotemporal diffusion model as a generative prior within a variational reconstruction framework for cine MRI. The model employs dedicated spatial layers to encode anatomical structure and te"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.03299","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/2607.03299/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":"2026-07-07T02:17:36Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"fABBe/yz3rJSmqm3RH8lk4lu2x1xNssbuqtrdJxRsUib2pCAL7v6Fvpv9P6g3AT3yHXKUT2JitMC3ju/G4gPCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-04T14:08:38.005471Z"},"content_sha256":"25d034d989b7fbddb3eb890f49eb0c8b32415f0e691db099628e2387c754b14e","schema_version":"1.0","event_id":"sha256:25d034d989b7fbddb3eb890f49eb0c8b32415f0e691db099628e2387c754b14e"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/VLCG6XSAQGKOEU6CL3KT25N7NI/bundle.json","state_url":"https://pith.science/pith/VLCG6XSAQGKOEU6CL3KT25N7NI/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/VLCG6XSAQGKOEU6CL3KT25N7NI/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":"2026-08-04T14:08:38Z","links":{"resolver":"https://pith.science/pith/VLCG6XSAQGKOEU6CL3KT25N7NI","bundle":"https://pith.science/pith/VLCG6XSAQGKOEU6CL3KT25N7NI/bundle.json","state":"https://pith.science/pith/VLCG6XSAQGKOEU6CL3KT25N7NI/state.json","well_known_bundle":"https://pith.science/.well-known/pith/VLCG6XSAQGKOEU6CL3KT25N7NI/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2026:VLCG6XSAQGKOEU6CL3KT25N7NI","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":"608c505ac260dcc5c6e2a04513ef5c475fe3ed84fb02224d3984bfef27f397a5","cross_cats_sorted":["cs.CV","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2026-07-03T13:09:54Z","title_canon_sha256":"9d206824806b52fadd4bac813457b32fc04aa0630be81feb04b04f36b96d39bc"},"schema_version":"1.0","source":{"id":"2607.03299","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2607.03299","created_at":"2026-07-07T02:17:36Z"},{"alias_kind":"arxiv_version","alias_value":"2607.03299v1","created_at":"2026-07-07T02:17:36Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2607.03299","created_at":"2026-07-07T02:17:36Z"},{"alias_kind":"pith_short_12","alias_value":"VLCG6XSAQGKO","created_at":"2026-07-07T02:17:36Z"},{"alias_kind":"pith_short_16","alias_value":"VLCG6XSAQGKOEU6C","created_at":"2026-07-07T02:17:36Z"},{"alias_kind":"pith_short_8","alias_value":"VLCG6XSA","created_at":"2026-07-07T02:17:36Z"}],"graph_snapshots":[{"event_id":"sha256:25d034d989b7fbddb3eb890f49eb0c8b32415f0e691db099628e2387c754b14e","target":"graph","created_at":"2026-07-07T02:17:36Z","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/2607.03299/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Real-time cardiac cine MRI enables visualization of the beating heart during free breathing, but severe undersampling and motion make reconstruction highly challenging. A central challenge for reconstruction is incorporating powerful priors of cardiac anatomy while remaining computationally efficient. We propose Piecewise Dynamic Diffusion Regularization (PDDR), a reconstruction method that integrates a spatiotemporal diffusion model as a generative prior within a variational reconstruction framework for cine MRI. The model employs dedicated spatial layers to encode anatomical structure and te","authors_text":"Florian F\\\"urnrohr, Reinhard Heckel","cross_cats":["cs.CV","cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2026-07-03T13:09:54Z","title":"Piecewise Dynamic Diffusion Regularization for Reconstruction of Cardiac Cine MRI"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.03299","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":"sha256:056a8726c7f7bd60ec9da58ae569d13621a6d3253062cece47568491cc08aee9","target":"record","created_at":"2026-07-07T02:17:36Z","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":"608c505ac260dcc5c6e2a04513ef5c475fe3ed84fb02224d3984bfef27f397a5","cross_cats_sorted":["cs.CV","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2026-07-03T13:09:54Z","title_canon_sha256":"9d206824806b52fadd4bac813457b32fc04aa0630be81feb04b04f36b96d39bc"},"schema_version":"1.0","source":{"id":"2607.03299","kind":"arxiv","version":1}},"canonical_sha256":"aac46f5e408194e253c25ed53d75bf6a12f87197f50ed9b2bbb99144a4757fae","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"aac46f5e408194e253c25ed53d75bf6a12f87197f50ed9b2bbb99144a4757fae","first_computed_at":"2026-07-07T02:17:36.166134Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-07T02:17:36.166134Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"mGjKRo6oa5TL54yN9QF2yg/VlTmAHwtXK46hvHT9do/Koy/SwYg+O/SkaMTHkD4IVkJfUyC/wl8D5oz7bdfnAA==","signature_status":"signed_v1","signed_at":"2026-07-07T02:17:36.167133Z","signed_message":"canonical_sha256_bytes"},"source_id":"2607.03299","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:056a8726c7f7bd60ec9da58ae569d13621a6d3253062cece47568491cc08aee9","sha256:25d034d989b7fbddb3eb890f49eb0c8b32415f0e691db099628e2387c754b14e"],"state_sha256":"cec2f8580f837e1837898ff8a5835c43fa033eaef3bc9cf2cc1edf9de5a6e09b"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6/+bBGWeDjnZlb/LYdUqPV4xbzUzm/An+gHYMBLjzKu7yE7jp42UuanIAbgKfixkD+lQcDXNMqljFY4Wf6uMAA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-04T14:08:38.038953Z","bundle_sha256":"41e2444825fc8dc8dd907e18b574f61c7f9f02e7dfd2aebcbc22b44036a5dbdf"}}