{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:PG42NPVWB3UVNUIS7O4ZD24YIU","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":"15d1194ef90a0852aeb6e944ce5932cf0d83935ef1e88f7fe059765b422dabec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-11-19T17:03:29Z","title_canon_sha256":"32d6c7587e10a54df3acb43f8d9f12d1e937d42b6a542822a350709504daaacb"},"schema_version":"1.0","source":{"id":"2511.15617","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2511.15617","created_at":"2026-06-10T01:09:46Z"},{"alias_kind":"arxiv_version","alias_value":"2511.15617v2","created_at":"2026-06-10T01:09:46Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2511.15617","created_at":"2026-06-10T01:09:46Z"},{"alias_kind":"pith_short_12","alias_value":"PG42NPVWB3UV","created_at":"2026-06-10T01:09:46Z"},{"alias_kind":"pith_short_16","alias_value":"PG42NPVWB3UVNUIS","created_at":"2026-06-10T01:09:46Z"},{"alias_kind":"pith_short_8","alias_value":"PG42NPVW","created_at":"2026-06-10T01:09:46Z"}],"graph_snapshots":[{"event_id":"sha256:b3b54acd7e847bee0972ebd705314f01d01a0e69bf2f1dd2ab291ef67f8fb433","target":"graph","created_at":"2026-06-10T01:09:46Z","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/2511.15617/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Purpose: To demonstrate the feasibility of performing in-vivo imaging and quantitative relaxation mapping of soft and hard tissues using a low-cost, portable MRI scanner, and to establish the methodological foundations for zero echo time (ZTE) imaging in systems affected by strong field inhomogeneities. Methods: A complete framework for artifact-free ZTE imaging at low field was developed, including: (i) RF pulse pre/counteremphasis calibration to minimize ring-down and electronics switching time; (ii) an extension of a recent single-point double-shot (SPDS) protocol for simultaneous B0 and B1","authors_text":"Alba Gonz\\'alez-Cebri\\'an, Eduardo Pall\\'as, Elisa Casta\\~n\\'on, Fernando Galve, Jes\\'us Conejero, Joseba Alonso, Jose Borreguero, Jose Miguel Algar\\'in, Laia Porcar, Lorena Vega Cid, Lucas Swistunow, Luiz G. C. Santos, Marina Fern\\'andez-Garc\\'ia, Pablo Benlloch, Pablo Garc\\'ia-Crist\\'obal, Rub\\'en Bosch, Teresa Guallart-Naval","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-11-19T17:03:29Z","title":"Qualitative and quantitative hard-tissue MRI with portable Halbach scanners"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2511.15617","kind":"arxiv","version":2},"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":"sha256:097efccff6975b186dae275ee8c9ec54a825d931b7e785e28695585e90d45bcb","target":"record","created_at":"2026-06-10T01:09:46Z","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":"15d1194ef90a0852aeb6e944ce5932cf0d83935ef1e88f7fe059765b422dabec","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-11-19T17:03:29Z","title_canon_sha256":"32d6c7587e10a54df3acb43f8d9f12d1e937d42b6a542822a350709504daaacb"},"schema_version":"1.0","source":{"id":"2511.15617","kind":"arxiv","version":2}},"canonical_sha256":"79b9a6beb60ee956d112fbb991eb98453eeb40c1fdafd2014bf1383ce65c5370","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"79b9a6beb60ee956d112fbb991eb98453eeb40c1fdafd2014bf1383ce65c5370","first_computed_at":"2026-06-10T01:09:46.863771Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-10T01:09:46.863771Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"FRKMCWsmCYbT9fQAFfuEykwnT/PAK5DRE7pSsGYBZpWfmlCI2NJLnbYqNqG85BtPqhBbDmluorrL4KZTyleyAQ==","signature_status":"signed_v1","signed_at":"2026-06-10T01:09:46.864339Z","signed_message":"canonical_sha256_bytes"},"source_id":"2511.15617","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:097efccff6975b186dae275ee8c9ec54a825d931b7e785e28695585e90d45bcb","sha256:b3b54acd7e847bee0972ebd705314f01d01a0e69bf2f1dd2ab291ef67f8fb433"],"state_sha256":"59cb93734caed6e492ee96787ae96984423d1e2456ac9abac6c321edb28d8c69"}