{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:2XXEGUJK53GVLJTH6RKOYJ4J77","short_pith_number":"pith:2XXEGUJK","canonical_record":{"source":{"id":"1908.07623","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-20T21:54:01Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"8c9ac6f9e29916b291ff2269af2eaf7319498d974767d8daa44ea813e9423236","abstract_canon_sha256":"52af7ec795938fc0446e4a4ec091f06db323781b70b5d9ff02f8956f2732c618"},"schema_version":"1.0"},"canonical_sha256":"d5ee43512aeecd55a667f454ec2789ffe2f47b37309ba0af4239890d19fd3e4b","source":{"kind":"arxiv","id":"1908.07623","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.07623","created_at":"2026-07-04T23:58:59Z"},{"alias_kind":"arxiv_version","alias_value":"1908.07623v1","created_at":"2026-07-04T23:58:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.07623","created_at":"2026-07-04T23:58:59Z"},{"alias_kind":"pith_short_12","alias_value":"2XXEGUJK53GV","created_at":"2026-07-04T23:58:59Z"},{"alias_kind":"pith_short_16","alias_value":"2XXEGUJK53GVLJTH","created_at":"2026-07-04T23:58:59Z"},{"alias_kind":"pith_short_8","alias_value":"2XXEGUJK","created_at":"2026-07-04T23:58:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:2XXEGUJK53GVLJTH6RKOYJ4J77","target":"record","payload":{"canonical_record":{"source":{"id":"1908.07623","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-20T21:54:01Z","cross_cats_sorted":["cs.CV"],"title_canon_sha256":"8c9ac6f9e29916b291ff2269af2eaf7319498d974767d8daa44ea813e9423236","abstract_canon_sha256":"52af7ec795938fc0446e4a4ec091f06db323781b70b5d9ff02f8956f2732c618"},"schema_version":"1.0"},"canonical_sha256":"d5ee43512aeecd55a667f454ec2789ffe2f47b37309ba0af4239890d19fd3e4b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-04T23:58:59.766826Z","signature_b64":"arfMvGhqiTH2rxeAma1yJOmbb57tctZ4MbIOwTA68n0DTV3GtT5Dm7GAZwF4kKci7HIOSEyjLEQOfqHQpYRUDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d5ee43512aeecd55a667f454ec2789ffe2f47b37309ba0af4239890d19fd3e4b","last_reissued_at":"2026-07-04T23:58:59.766458Z","signature_status":"signed_v1","first_computed_at":"2026-07-04T23:58:59.766458Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1908.07623","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":"2026-07-04T23:58:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"WEb4UJtdseVr/aqsvRcRlFWG2OWm/b5TnYsV3UaiP/p+qJeht4CjJDgDXT6kI8PnPQPAvFMMkYUT+rzYZvFzBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T17:28:34.682023Z"},"content_sha256":"84cf769fdd27ccee6d30fb9017881c5b63f01349b0692e0332b58da66f7aab30","schema_version":"1.0","event_id":"sha256:84cf769fdd27ccee6d30fb9017881c5b63f01349b0692e0332b58da66f7aab30"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:2XXEGUJK53GVLJTH6RKOYJ4J77","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Joint Motion Estimation and Segmentation from Undersampled Cardiac MR Image","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV"],"primary_cat":"eess.IV","authors_text":"Chen Qin, Daniel Rueckert, Jo Schlemper, Stefan K. Piechnik, Stefan Neubauer, Steffen E. Petersen, Wenjia Bai","submitted_at":"2019-08-20T21:54:01Z","abstract_excerpt":"Accelerating the acquisition of magnetic resonance imaging (MRI) is a challenging problem, and many works have been proposed to reconstruct images from undersampled k-space data. However, if the main purpose is to extract certain quantitative measures from the images, perfect reconstructions may not always be necessary as long as the images enable the means of extracting the clinically relevant measures. In this paper, we work on jointly predicting cardiac motion estimation and segmentation directly from undersampled data, which are two important steps in quantitatively assessing cardiac funct"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.07623","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/1908.07623/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":"2026-07-04T23:58:59Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+6d1frelEvUpBl3SzySWsJZmDDmvOII+PpVqrb30LD2Uk94+Fw3nwZHQNFdv+3ebmkGvQ+qj9YXPKAQM7pwuCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-16T17:28:34.682950Z"},"content_sha256":"737d0bd70b39d9fc2c44c9066c81b775a686df3adcf8247f0ec75699657bd629","schema_version":"1.0","event_id":"sha256:737d0bd70b39d9fc2c44c9066c81b775a686df3adcf8247f0ec75699657bd629"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2XXEGUJK53GVLJTH6RKOYJ4J77/bundle.json","state_url":"https://pith.science/pith/2XXEGUJK53GVLJTH6RKOYJ4J77/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2XXEGUJK53GVLJTH6RKOYJ4J77/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":"2026-08-16T17:28:34Z","links":{"resolver":"https://pith.science/pith/2XXEGUJK53GVLJTH6RKOYJ4J77","bundle":"https://pith.science/pith/2XXEGUJK53GVLJTH6RKOYJ4J77/bundle.json","state":"https://pith.science/pith/2XXEGUJK53GVLJTH6RKOYJ4J77/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2XXEGUJK53GVLJTH6RKOYJ4J77/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:2XXEGUJK53GVLJTH6RKOYJ4J77","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":"52af7ec795938fc0446e4a4ec091f06db323781b70b5d9ff02f8956f2732c618","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-20T21:54:01Z","title_canon_sha256":"8c9ac6f9e29916b291ff2269af2eaf7319498d974767d8daa44ea813e9423236"},"schema_version":"1.0","source":{"id":"1908.07623","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1908.07623","created_at":"2026-07-04T23:58:59Z"},{"alias_kind":"arxiv_version","alias_value":"1908.07623v1","created_at":"2026-07-04T23:58:59Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1908.07623","created_at":"2026-07-04T23:58:59Z"},{"alias_kind":"pith_short_12","alias_value":"2XXEGUJK53GV","created_at":"2026-07-04T23:58:59Z"},{"alias_kind":"pith_short_16","alias_value":"2XXEGUJK53GVLJTH","created_at":"2026-07-04T23:58:59Z"},{"alias_kind":"pith_short_8","alias_value":"2XXEGUJK","created_at":"2026-07-04T23:58:59Z"}],"graph_snapshots":[{"event_id":"sha256:737d0bd70b39d9fc2c44c9066c81b775a686df3adcf8247f0ec75699657bd629","target":"graph","created_at":"2026-07-04T23:58:59Z","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/1908.07623/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Accelerating the acquisition of magnetic resonance imaging (MRI) is a challenging problem, and many works have been proposed to reconstruct images from undersampled k-space data. However, if the main purpose is to extract certain quantitative measures from the images, perfect reconstructions may not always be necessary as long as the images enable the means of extracting the clinically relevant measures. In this paper, we work on jointly predicting cardiac motion estimation and segmentation directly from undersampled data, which are two important steps in quantitatively assessing cardiac funct","authors_text":"Chen Qin, Daniel Rueckert, Jo Schlemper, Stefan K. Piechnik, Stefan Neubauer, Steffen E. Petersen, Wenjia Bai","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-20T21:54:01Z","title":"Joint Motion Estimation and Segmentation from Undersampled Cardiac MR Image"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1908.07623","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":"sha256:84cf769fdd27ccee6d30fb9017881c5b63f01349b0692e0332b58da66f7aab30","target":"record","created_at":"2026-07-04T23:58:59Z","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":"52af7ec795938fc0446e4a4ec091f06db323781b70b5d9ff02f8956f2732c618","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-08-20T21:54:01Z","title_canon_sha256":"8c9ac6f9e29916b291ff2269af2eaf7319498d974767d8daa44ea813e9423236"},"schema_version":"1.0","source":{"id":"1908.07623","kind":"arxiv","version":1}},"canonical_sha256":"d5ee43512aeecd55a667f454ec2789ffe2f47b37309ba0af4239890d19fd3e4b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d5ee43512aeecd55a667f454ec2789ffe2f47b37309ba0af4239890d19fd3e4b","first_computed_at":"2026-07-04T23:58:59.766458Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-04T23:58:59.766458Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"arfMvGhqiTH2rxeAma1yJOmbb57tctZ4MbIOwTA68n0DTV3GtT5Dm7GAZwF4kKci7HIOSEyjLEQOfqHQpYRUDw==","signature_status":"signed_v1","signed_at":"2026-07-04T23:58:59.766826Z","signed_message":"canonical_sha256_bytes"},"source_id":"1908.07623","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:84cf769fdd27ccee6d30fb9017881c5b63f01349b0692e0332b58da66f7aab30","sha256:737d0bd70b39d9fc2c44c9066c81b775a686df3adcf8247f0ec75699657bd629"],"state_sha256":"66520d7899ea26f4dc2e5f9ad1717b33744208c0fc7d66bfd4cec05203496d01"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0B+XV/4LmtaqUr4gxv+RgQTe1lTKRQEYlWdou5S0DEuDBON2gNYMkLe/kar0humxnZjn0bi7rNynIVxkzA9CAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-16T17:28:34.734139Z","bundle_sha256":"010c6d7f4dabe08d65df5aeba9737e55895415dae84d8118e816a77a84620f7b"}}