{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2020:7ILND52VB4B4X7B2JNBGJUV57K","short_pith_number":"pith:7ILND52V","canonical_record":{"source":{"id":"2008.04308","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-08-10T15:58:54Z","cross_cats_sorted":["cs.SE","eess.SP","physics.med-ph"],"title_canon_sha256":"250952d710858fd6e0209c1ef018b6121c36b68f30572cc9fe57ab5fc2629633","abstract_canon_sha256":"f0c0695cec3fc25a42c8fdf975b2c005c2f7c22a6ee72a23f03708e1f4474464"},"schema_version":"1.0"},"canonical_sha256":"fa16d1f7550f03cbfc3a4b4264d2bdfa921e790f83395efaa73fc94a4a76a8ac","source":{"kind":"arxiv","id":"2008.04308","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.04308","created_at":"2026-07-05T02:13:48Z"},{"alias_kind":"arxiv_version","alias_value":"2008.04308v1","created_at":"2026-07-05T02:13:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.04308","created_at":"2026-07-05T02:13:48Z"},{"alias_kind":"pith_short_12","alias_value":"7ILND52VB4B4","created_at":"2026-07-05T02:13:48Z"},{"alias_kind":"pith_short_16","alias_value":"7ILND52VB4B4X7B2","created_at":"2026-07-05T02:13:48Z"},{"alias_kind":"pith_short_8","alias_value":"7ILND52V","created_at":"2026-07-05T02:13:48Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2020:7ILND52VB4B4X7B2JNBGJUV57K","target":"record","payload":{"canonical_record":{"source":{"id":"2008.04308","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-08-10T15:58:54Z","cross_cats_sorted":["cs.SE","eess.SP","physics.med-ph"],"title_canon_sha256":"250952d710858fd6e0209c1ef018b6121c36b68f30572cc9fe57ab5fc2629633","abstract_canon_sha256":"f0c0695cec3fc25a42c8fdf975b2c005c2f7c22a6ee72a23f03708e1f4474464"},"schema_version":"1.0"},"canonical_sha256":"fa16d1f7550f03cbfc3a4b4264d2bdfa921e790f83395efaa73fc94a4a76a8ac","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:13:48.431009Z","signature_b64":"U84MoDYYdCenNJ2o9JTGOtvgVKOzhi+Jd0oWHY4VipeR0SXQzWzUTg9ln1nmY7in2KBaI4nWrSBtW+PsjWPkAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"fa16d1f7550f03cbfc3a4b4264d2bdfa921e790f83395efaa73fc94a4a76a8ac","last_reissued_at":"2026-07-05T02:13:48.430539Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:13:48.430539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2008.04308","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":"2026-07-05T02:13:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"/Eu0QXmVYBMikjxp2pKyGsNl8g1RJB1CwcXhU4Ttq8daRgxJaRXO06ycAx6kL5axJXsgOflaW6JpgKGWy8QRBQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T04:45:34.719958Z"},"content_sha256":"fda91e4069cf0ce00280cddfa5d6d11b7be6c20b809c99b3cee90b8986ca2868","schema_version":"1.0","event_id":"sha256:fda91e4069cf0ce00280cddfa5d6d11b7be6c20b809c99b3cee90b8986ca2868"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2020:7ILND52VB4B4X7B2JNBGJUV57K","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"CG-SENSE revisited: Results from the first ISMRM reproducibility challenge","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.SE","eess.SP","physics.med-ph"],"primary_cat":"eess.IV","authors_text":"Agah Karakuzu, Alexander Fyrdahl, Daniel Gallichan, Florian Knoll, Franz Patzig, Kerstin Hammernik, Ke Wang, Lars Kasper, Martin Uecker, Michael Loecher, Oliver Maier, Seb Harrevelt, Steven H. Baete, Ye Tian","submitted_at":"2020-08-10T15:58:54Z","abstract_excerpt":"Purpose: The aim of this work is to shed light on the issue of reproducibility in MR image reconstruction in the context of a challenge. Participants had to recreate the results of \"Advances in sensitivity encoding with arbitrary k-space trajectories\" by Pruessmann et al.\n  Methods: The task of the challenge was to reconstruct radially acquired multi-coil k-space data (brain/heart) following the method in the original paper, reproducing its key figures. Results were compared to consolidated reference implementations created after the challenge, accounting for the two most common programming la"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.04308","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/2008.04308/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":"2026-07-05T02:13:48Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zvrGJkJuaeU6AvcAEjs8HthXzl0241lNjuxsUSc1axUaNjBdWmz2unrr8KTOsPog2TY4Of26idxhK9OwPCMlBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-07T04:45:34.720491Z"},"content_sha256":"35b870d06e8d24709a343ab6e43605bc821b588dcafa6ebdea88f7b7acc6679c","schema_version":"1.0","event_id":"sha256:35b870d06e8d24709a343ab6e43605bc821b588dcafa6ebdea88f7b7acc6679c"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/7ILND52VB4B4X7B2JNBGJUV57K/bundle.json","state_url":"https://pith.science/pith/7ILND52VB4B4X7B2JNBGJUV57K/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/7ILND52VB4B4X7B2JNBGJUV57K/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":"2026-08-07T04:45:34Z","links":{"resolver":"https://pith.science/pith/7ILND52VB4B4X7B2JNBGJUV57K","bundle":"https://pith.science/pith/7ILND52VB4B4X7B2JNBGJUV57K/bundle.json","state":"https://pith.science/pith/7ILND52VB4B4X7B2JNBGJUV57K/state.json","well_known_bundle":"https://pith.science/.well-known/pith/7ILND52VB4B4X7B2JNBGJUV57K/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:7ILND52VB4B4X7B2JNBGJUV57K","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":"f0c0695cec3fc25a42c8fdf975b2c005c2f7c22a6ee72a23f03708e1f4474464","cross_cats_sorted":["cs.SE","eess.SP","physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-08-10T15:58:54Z","title_canon_sha256":"250952d710858fd6e0209c1ef018b6121c36b68f30572cc9fe57ab5fc2629633"},"schema_version":"1.0","source":{"id":"2008.04308","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.04308","created_at":"2026-07-05T02:13:48Z"},{"alias_kind":"arxiv_version","alias_value":"2008.04308v1","created_at":"2026-07-05T02:13:48Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.04308","created_at":"2026-07-05T02:13:48Z"},{"alias_kind":"pith_short_12","alias_value":"7ILND52VB4B4","created_at":"2026-07-05T02:13:48Z"},{"alias_kind":"pith_short_16","alias_value":"7ILND52VB4B4X7B2","created_at":"2026-07-05T02:13:48Z"},{"alias_kind":"pith_short_8","alias_value":"7ILND52V","created_at":"2026-07-05T02:13:48Z"}],"graph_snapshots":[{"event_id":"sha256:35b870d06e8d24709a343ab6e43605bc821b588dcafa6ebdea88f7b7acc6679c","target":"graph","created_at":"2026-07-05T02:13:48Z","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/2008.04308/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Purpose: The aim of this work is to shed light on the issue of reproducibility in MR image reconstruction in the context of a challenge. Participants had to recreate the results of \"Advances in sensitivity encoding with arbitrary k-space trajectories\" by Pruessmann et al.\n  Methods: The task of the challenge was to reconstruct radially acquired multi-coil k-space data (brain/heart) following the method in the original paper, reproducing its key figures. Results were compared to consolidated reference implementations created after the challenge, accounting for the two most common programming la","authors_text":"Agah Karakuzu, Alexander Fyrdahl, Daniel Gallichan, Florian Knoll, Franz Patzig, Kerstin Hammernik, Ke Wang, Lars Kasper, Martin Uecker, Michael Loecher, Oliver Maier, Seb Harrevelt, Steven H. Baete, Ye Tian","cross_cats":["cs.SE","eess.SP","physics.med-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-08-10T15:58:54Z","title":"CG-SENSE revisited: Results from the first ISMRM reproducibility challenge"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.04308","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:fda91e4069cf0ce00280cddfa5d6d11b7be6c20b809c99b3cee90b8986ca2868","target":"record","created_at":"2026-07-05T02:13:48Z","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":"f0c0695cec3fc25a42c8fdf975b2c005c2f7c22a6ee72a23f03708e1f4474464","cross_cats_sorted":["cs.SE","eess.SP","physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-08-10T15:58:54Z","title_canon_sha256":"250952d710858fd6e0209c1ef018b6121c36b68f30572cc9fe57ab5fc2629633"},"schema_version":"1.0","source":{"id":"2008.04308","kind":"arxiv","version":1}},"canonical_sha256":"fa16d1f7550f03cbfc3a4b4264d2bdfa921e790f83395efaa73fc94a4a76a8ac","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"fa16d1f7550f03cbfc3a4b4264d2bdfa921e790f83395efaa73fc94a4a76a8ac","first_computed_at":"2026-07-05T02:13:48.430539Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:13:48.430539Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"U84MoDYYdCenNJ2o9JTGOtvgVKOzhi+Jd0oWHY4VipeR0SXQzWzUTg9ln1nmY7in2KBaI4nWrSBtW+PsjWPkAA==","signature_status":"signed_v1","signed_at":"2026-07-05T02:13:48.431009Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.04308","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fda91e4069cf0ce00280cddfa5d6d11b7be6c20b809c99b3cee90b8986ca2868","sha256:35b870d06e8d24709a343ab6e43605bc821b588dcafa6ebdea88f7b7acc6679c"],"state_sha256":"4df037bdff1f3c414d49e519816a1b89adcf446264217ef34d3e8d94f712a3ea"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"95KEg08NOPngWAnOsuyhN0Uu2ceor58OCFGQPBaYbcqpnBodtFeIhDIZ0atpL1BRpAWhn04jeiFd9j5QrwjdBA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-07T04:45:34.725499Z","bundle_sha256":"0b7fac06d690e940a5446b15dca17c925a1fdf26fd6303da5ccb83e2ed043fd9"}}