{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2017:KGLNAF7PBW5G3N32UCTK6BNQE6","short_pith_number":"pith:KGLNAF7P","canonical_record":{"source":{"id":"1703.00481","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-03-01T20:00:43Z","cross_cats_sorted":[],"title_canon_sha256":"1250486be8009cfd26cad5150f4eef148fd27cd2489dec02717c488862eff2ef","abstract_canon_sha256":"4a44662bc97fef83d67edb324b18bb2b2822d182ddc066f111049ded1eda4ef0"},"schema_version":"1.0"},"canonical_sha256":"5196d017ef0dba6db77aa0a6af05b027af14975df6758bb9d1cc3cd55551163a","source":{"kind":"arxiv","id":"1703.00481","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.00481","created_at":"2026-05-17T23:42:31Z"},{"alias_kind":"arxiv_version","alias_value":"1703.00481v2","created_at":"2026-05-17T23:42:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.00481","created_at":"2026-05-17T23:42:31Z"},{"alias_kind":"pith_short_12","alias_value":"KGLNAF7PBW5G","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"KGLNAF7PBW5G3N32","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"KGLNAF7P","created_at":"2026-05-18T12:31:24Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2017:KGLNAF7PBW5G3N32UCTK6BNQE6","target":"record","payload":{"canonical_record":{"source":{"id":"1703.00481","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-03-01T20:00:43Z","cross_cats_sorted":[],"title_canon_sha256":"1250486be8009cfd26cad5150f4eef148fd27cd2489dec02717c488862eff2ef","abstract_canon_sha256":"4a44662bc97fef83d67edb324b18bb2b2822d182ddc066f111049ded1eda4ef0"},"schema_version":"1.0"},"canonical_sha256":"5196d017ef0dba6db77aa0a6af05b027af14975df6758bb9d1cc3cd55551163a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:42:31.166432Z","signature_b64":"hZOtdiqXK3+yhGVfszkxIFQT26RTk06QcPwv+fnBFvmQTh03/zAxHq5SvEMekBgrtzq+rJCp6oaaKPf/WfkHAQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"5196d017ef0dba6db77aa0a6af05b027af14975df6758bb9d1cc3cd55551163a","last_reissued_at":"2026-05-17T23:42:31.165951Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:42:31.165951Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1703.00481","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-17T23:42:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Z4vyjm6E8lgsEctH2WiPm4/d2VkWGjkTv7JhryrJF0P05H15FNEU6NxwoXGYypggS0qeEs+UpLKQjgDrQ+enAQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T05:45:57.387477Z"},"content_sha256":"c14e1bf7cc6cabc0086ef7c641b68b5d0bd6b510879cb7aeb519511a0d953d57","schema_version":"1.0","event_id":"sha256:c14e1bf7cc6cabc0086ef7c641b68b5d0bd6b510879cb7aeb519511a0d953d57"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2017:KGLNAF7PBW5G3N32UCTK6BNQE6","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Optimized Quantification of Spin Relaxation Times in the Hybrid State","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Daniel K Sodickson, Jakob Assl\\\"ander, Martijn A Cloos, Riccardo Lattanzi","submitted_at":"2017-03-01T20:00:43Z","abstract_excerpt":"Purpose: The analysis of optimized spin ensemble trajectories for relaxometry in the hybrid state.\n  Methods: First, we constructed visual representations to elucidate the differential equation that governs spin dynamics in hybrid state. Subsequently, numerical optimizations were performed to find spin ensemble trajectories that minimize the Cram\\'er-Rao bound for $T_1$-encoding, $T_2$-encoding, and their weighted sum, respectively, followed by a comparison of the Cram\\'er-Rao bounds obtained with our optimized spin-trajectories, as well as Look-Locker and multi-spin-echo methods. Finally, we "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.00481","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"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":"2026-05-17T23:42:31Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"vVoyxeE9IrMIE1Q+9WggLYZFqw2cW4qoV5SlWaQ3U/knM0Ezll8hXIM6kwTbn/OGs8OnzU3yC74RTNZCVSlHAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-22T05:45:57.387822Z"},"content_sha256":"40a891aac3a408af464118a148fc8095a1ef4014b5dd8b6076b1d7d9d9e67aec","schema_version":"1.0","event_id":"sha256:40a891aac3a408af464118a148fc8095a1ef4014b5dd8b6076b1d7d9d9e67aec"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/KGLNAF7PBW5G3N32UCTK6BNQE6/bundle.json","state_url":"https://pith.science/pith/KGLNAF7PBW5G3N32UCTK6BNQE6/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/KGLNAF7PBW5G3N32UCTK6BNQE6/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":"2026-06-22T05:45:57Z","links":{"resolver":"https://pith.science/pith/KGLNAF7PBW5G3N32UCTK6BNQE6","bundle":"https://pith.science/pith/KGLNAF7PBW5G3N32UCTK6BNQE6/bundle.json","state":"https://pith.science/pith/KGLNAF7PBW5G3N32UCTK6BNQE6/state.json","well_known_bundle":"https://pith.science/.well-known/pith/KGLNAF7PBW5G3N32UCTK6BNQE6/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2017:KGLNAF7PBW5G3N32UCTK6BNQE6","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":"4a44662bc97fef83d67edb324b18bb2b2822d182ddc066f111049ded1eda4ef0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-03-01T20:00:43Z","title_canon_sha256":"1250486be8009cfd26cad5150f4eef148fd27cd2489dec02717c488862eff2ef"},"schema_version":"1.0","source":{"id":"1703.00481","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1703.00481","created_at":"2026-05-17T23:42:31Z"},{"alias_kind":"arxiv_version","alias_value":"1703.00481v2","created_at":"2026-05-17T23:42:31Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1703.00481","created_at":"2026-05-17T23:42:31Z"},{"alias_kind":"pith_short_12","alias_value":"KGLNAF7PBW5G","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_16","alias_value":"KGLNAF7PBW5G3N32","created_at":"2026-05-18T12:31:24Z"},{"alias_kind":"pith_short_8","alias_value":"KGLNAF7P","created_at":"2026-05-18T12:31:24Z"}],"graph_snapshots":[{"event_id":"sha256:40a891aac3a408af464118a148fc8095a1ef4014b5dd8b6076b1d7d9d9e67aec","target":"graph","created_at":"2026-05-17T23:42:31Z","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":"Purpose: The analysis of optimized spin ensemble trajectories for relaxometry in the hybrid state.\n  Methods: First, we constructed visual representations to elucidate the differential equation that governs spin dynamics in hybrid state. Subsequently, numerical optimizations were performed to find spin ensemble trajectories that minimize the Cram\\'er-Rao bound for $T_1$-encoding, $T_2$-encoding, and their weighted sum, respectively, followed by a comparison of the Cram\\'er-Rao bounds obtained with our optimized spin-trajectories, as well as Look-Locker and multi-spin-echo methods. Finally, we ","authors_text":"Daniel K Sodickson, Jakob Assl\\\"ander, Martijn A Cloos, Riccardo Lattanzi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-03-01T20:00:43Z","title":"Optimized Quantification of Spin Relaxation Times in the Hybrid State"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1703.00481","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:c14e1bf7cc6cabc0086ef7c641b68b5d0bd6b510879cb7aeb519511a0d953d57","target":"record","created_at":"2026-05-17T23:42:31Z","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":"4a44662bc97fef83d67edb324b18bb2b2822d182ddc066f111049ded1eda4ef0","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2017-03-01T20:00:43Z","title_canon_sha256":"1250486be8009cfd26cad5150f4eef148fd27cd2489dec02717c488862eff2ef"},"schema_version":"1.0","source":{"id":"1703.00481","kind":"arxiv","version":2}},"canonical_sha256":"5196d017ef0dba6db77aa0a6af05b027af14975df6758bb9d1cc3cd55551163a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"5196d017ef0dba6db77aa0a6af05b027af14975df6758bb9d1cc3cd55551163a","first_computed_at":"2026-05-17T23:42:31.165951Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:42:31.165951Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"hZOtdiqXK3+yhGVfszkxIFQT26RTk06QcPwv+fnBFvmQTh03/zAxHq5SvEMekBgrtzq+rJCp6oaaKPf/WfkHAQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:42:31.166432Z","signed_message":"canonical_sha256_bytes"},"source_id":"1703.00481","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:c14e1bf7cc6cabc0086ef7c641b68b5d0bd6b510879cb7aeb519511a0d953d57","sha256:40a891aac3a408af464118a148fc8095a1ef4014b5dd8b6076b1d7d9d9e67aec"],"state_sha256":"8ee5c9f03375062ef049982a885e707cadc9d0a0ef0c04a4697812e99e282e77"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p93cuXbetHGHsFonkUn+kdQZB7ZDQ68605LTiH7vOa2QvsO+cN5wkinF+jg0N5iP2aCnfLZLfAxY5rrDuiU0Cw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-22T05:45:57.389836Z","bundle_sha256":"c31db2498d05d37fbdbaedb0e0f488cabad2f5f3f1db2880d79f9ab5e7398150"}}