{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:F2PERANNDNXUFDVXZ24HWEI22P","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":"bc39f3bfd4d3cc8be83d9ec9847a1529dba9702b5adb9f8d603939a9afaf3520","cross_cats_sorted":["physics.bio-ph","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2016-10-06T16:11:02Z","title_canon_sha256":"06b04067c869eeb8709a07908d2d704536c9008e555fe1303568a7edb6436102"},"schema_version":"1.0","source":{"id":"1610.01924","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1610.01924","created_at":"2026-05-18T00:26:30Z"},{"alias_kind":"arxiv_version","alias_value":"1610.01924v1","created_at":"2026-05-18T00:26:30Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1610.01924","created_at":"2026-05-18T00:26:30Z"},{"alias_kind":"pith_short_12","alias_value":"F2PERANNDNXU","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_16","alias_value":"F2PERANNDNXUFDVX","created_at":"2026-05-18T12:30:15Z"},{"alias_kind":"pith_short_8","alias_value":"F2PERANN","created_at":"2026-05-18T12:30:15Z"}],"graph_snapshots":[{"event_id":"sha256:765cd7eb1ca8547505d0eb974cb40ba7caf458047b93e5594ca5a7f8612fbc8d","target":"graph","created_at":"2026-05-18T00:26:30Z","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"},"paper":{"abstract_excerpt":"Magnetic resonance imaging (MRI) is a widely used biomedical imaging modality that derives much of its contrast from microscale magnetic field gradients in biological tissues. However, the connection between these sub-voxel field patterns and MRI contrast has not been studied experimentally. Here, we describe a new method to map subcellular magnetic fields in mammalian cells and tissues using nitrogen vacancy diamond magnetometry and connect these maps to voxel-scale MRI contrast, providing insights for in vivo imaging and contrast agent design.","authors_text":"Aadyot Bhatnagar, Audrey Lee-Gosselin, David R. Glenn, Hunter C. Davis, John F. Barry, Mikhail G. Shapiro, Pradeep Ramesh, Ronald L. Walsworth","cross_cats":["physics.bio-ph","quant-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2016-10-06T16:11:02Z","title":"Mapping the Microscale Origins of MRI Contrast with Subcellular NV Diamond Magnetometry"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1610.01924","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:fb778fd5b987237abc1cdd9aa69df85395007f95820f8bbf1b6e3de4472d2e48","target":"record","created_at":"2026-05-18T00:26:30Z","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":"bc39f3bfd4d3cc8be83d9ec9847a1529dba9702b5adb9f8d603939a9afaf3520","cross_cats_sorted":["physics.bio-ph","quant-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2016-10-06T16:11:02Z","title_canon_sha256":"06b04067c869eeb8709a07908d2d704536c9008e555fe1303568a7edb6436102"},"schema_version":"1.0","source":{"id":"1610.01924","kind":"arxiv","version":1}},"canonical_sha256":"2e9e4881ad1b6f428eb7ceb87b111ad3cfb11d48b2829b51fc3fe2c9ccd658dc","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2e9e4881ad1b6f428eb7ceb87b111ad3cfb11d48b2829b51fc3fe2c9ccd658dc","first_computed_at":"2026-05-18T00:26:30.675818Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:26:30.675818Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"k+RKVZI6TO+1XrdIZ4cK2CZytm7u5bTJE4YbIlBntmj5iM1xr1dABCw26c8NcJCXx/drd5M62fAfYVuXGvfyAA==","signature_status":"signed_v1","signed_at":"2026-05-18T00:26:30.676546Z","signed_message":"canonical_sha256_bytes"},"source_id":"1610.01924","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fb778fd5b987237abc1cdd9aa69df85395007f95820f8bbf1b6e3de4472d2e48","sha256:765cd7eb1ca8547505d0eb974cb40ba7caf458047b93e5594ca5a7f8612fbc8d"],"state_sha256":"bac272499789d8fb461991fa7cbb38aef2f70025668ad9cc8ba81dc4458ab040"}