{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2020:3EWVC4RQSJUQJ2CSN3LLUKG3BG","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":"ce0df5aafb52ea2722d50179282a0993ee6224ca296fe6c2f8d0af7bb9169701","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-08-04T20:08:43Z","title_canon_sha256":"f536cb4daecd303f1818bac3747f67a8e1f35a72586713b0849612a06b909606"},"schema_version":"1.0","source":{"id":"2008.01806","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2008.01806","created_at":"2026-07-05T01:24:54Z"},{"alias_kind":"arxiv_version","alias_value":"2008.01806v1","created_at":"2026-07-05T01:24:54Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2008.01806","created_at":"2026-07-05T01:24:54Z"},{"alias_kind":"pith_short_12","alias_value":"3EWVC4RQSJUQ","created_at":"2026-07-05T01:24:54Z"},{"alias_kind":"pith_short_16","alias_value":"3EWVC4RQSJUQJ2CS","created_at":"2026-07-05T01:24:54Z"},{"alias_kind":"pith_short_8","alias_value":"3EWVC4RQ","created_at":"2026-07-05T01:24:54Z"}],"graph_snapshots":[{"event_id":"sha256:0b6aa6edd4446d199575e5a5bc1d50d7978ec69174907959c24282c5c315768e","target":"graph","created_at":"2026-07-05T01:24:54Z","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/2008.01806/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Magnetic resonance (MR)-$T_2^*$ mapping is widely used to study hemorrhage, calcification and iron deposition in various clinical applications, it provides a direct and precise mapping of desired contrast in the tissue. However, the long acquisition time required by conventional 3D high-resolution $T_2^*$ mapping method causes discomfort to patients and introduces motion artifacts to reconstructed images, which limits its wider applicability. In this paper we address this issue by performing $T_2^*$ mapping from undersampled data using compressive sensing (CS). We formulate the reconstruction ","authors_text":"Deqiang Qiu, James J. Lah, Jason W. Allen, Shuai Huang","cross_cats":["cs.CV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-08-04T20:08:43Z","title":"Fast Nonconvex $T_2^*$ Mapping Using ADMM"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2008.01806","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:d27df83df3e0901f7da094c2cbe4e24d7d2b1206ca0d78c861fd40ad0c52f92a","target":"record","created_at":"2026-07-05T01:24:54Z","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":"ce0df5aafb52ea2722d50179282a0993ee6224ca296fe6c2f8d0af7bb9169701","cross_cats_sorted":["cs.CV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2020-08-04T20:08:43Z","title_canon_sha256":"f536cb4daecd303f1818bac3747f67a8e1f35a72586713b0849612a06b909606"},"schema_version":"1.0","source":{"id":"2008.01806","kind":"arxiv","version":1}},"canonical_sha256":"d92d517230926904e8526ed6ba28db09a889374804d367526208604b8fe68a0b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d92d517230926904e8526ed6ba28db09a889374804d367526208604b8fe68a0b","first_computed_at":"2026-07-05T01:24:54.968387Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T01:24:54.968387Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"2G6d/gYaCDlHs6nQgC5bGzBSgf7oO2/IwrJfgkeeTepbnujnO4tNuo6PvlvFkrvbKfknIYGYspnNmt8T+nLhCA==","signature_status":"signed_v1","signed_at":"2026-07-05T01:24:54.968744Z","signed_message":"canonical_sha256_bytes"},"source_id":"2008.01806","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:d27df83df3e0901f7da094c2cbe4e24d7d2b1206ca0d78c861fd40ad0c52f92a","sha256:0b6aa6edd4446d199575e5a5bc1d50d7978ec69174907959c24282c5c315768e"],"state_sha256":"8560a93a3725eb38cd0befa024260f7670495b66d0a8505ce2ff1364a01e4d1a"}