{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:H76EY2R7APGJ7TDSTSQMGKGTNN","short_pith_number":"pith:H76EY2R7","canonical_record":{"source":{"id":"2510.02847","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-10-03T09:34:06Z","cross_cats_sorted":[],"title_canon_sha256":"be8d72bc101bc67f442d86002474c591387a5f9a31ac5c3f7aac7dd86cb09911","abstract_canon_sha256":"43b79ead7af92e3d782b9cbb7a97978a35ddb8b4a2b536b00873e340896a5ff9"},"schema_version":"1.0"},"canonical_sha256":"3ffc4c6a3f03cc9fcc729ca0c328d36b65e316324928915bcb89ae3ad202dcce","source":{"kind":"arxiv","id":"2510.02847","version":4},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2510.02847","created_at":"2026-06-23T01:11:57Z"},{"alias_kind":"arxiv_version","alias_value":"2510.02847v4","created_at":"2026-06-23T01:11:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2510.02847","created_at":"2026-06-23T01:11:57Z"},{"alias_kind":"pith_short_12","alias_value":"H76EY2R7APGJ","created_at":"2026-06-23T01:11:57Z"},{"alias_kind":"pith_short_16","alias_value":"H76EY2R7APGJ7TDS","created_at":"2026-06-23T01:11:57Z"},{"alias_kind":"pith_short_8","alias_value":"H76EY2R7","created_at":"2026-06-23T01:11:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:H76EY2R7APGJ7TDSTSQMGKGTNN","target":"record","payload":{"canonical_record":{"source":{"id":"2510.02847","kind":"arxiv","version":4},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-10-03T09:34:06Z","cross_cats_sorted":[],"title_canon_sha256":"be8d72bc101bc67f442d86002474c591387a5f9a31ac5c3f7aac7dd86cb09911","abstract_canon_sha256":"43b79ead7af92e3d782b9cbb7a97978a35ddb8b4a2b536b00873e340896a5ff9"},"schema_version":"1.0"},"canonical_sha256":"3ffc4c6a3f03cc9fcc729ca0c328d36b65e316324928915bcb89ae3ad202dcce","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-06-23T01:11:57.472728Z","signature_b64":"MsjLU7Q+RJkP+SxxV06QRi+75Q6uzHABHpy0na1ycPRTG6ix6lUc6wRzkkTmmkn3Qs3gZCG4Rh0qRt4V6bRnDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3ffc4c6a3f03cc9fcc729ca0c328d36b65e316324928915bcb89ae3ad202dcce","last_reissued_at":"2026-06-23T01:11:57.472176Z","signature_status":"signed_v1","first_computed_at":"2026-06-23T01:11:57.472176Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2510.02847","source_version":4,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-06-23T01:11:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"p38BHWcB1HUwOSfCMb+4ejsHQYygDT3BH+FjnZQihg+vG47ZSSLCPfusR+sjcfyAYI33cXTwQaXJoQZLf0xeCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T06:12:41.233780Z"},"content_sha256":"2ec8418d528a8d717001d18e7db8f23b6895b989cb04e8b19447e8ec2d05fb4b","schema_version":"1.0","event_id":"sha256:2ec8418d528a8d717001d18e7db8f23b6895b989cb04e8b19447e8ec2d05fb4b"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:H76EY2R7APGJ7TDSTSQMGKGTNN","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Dipolar order mapping based on spin-lock magnetic resonance imaging","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Qianxue Shan, Weitian Chen, Zijian Gao, Ziqiang Yu, Ziqin Zhou","submitted_at":"2025-10-03T09:34:06Z","abstract_excerpt":"Purpose: Inhomogeneous magnetization transfer (ihMT) effect reflects dipolar order with a dipolar relaxation time ($T_{1D}$), specific to motion-restricted macromolecules. We aim to quantify $T_{1D}$ using spin-lock MRI technique. Methods: In the proposed method, we introduce a $T_{1D}$-specific ratio, denoted as $RATIO_{dosl}$. This ratio is derived from the distinct relaxation rate $R_{dosl}$, calculated as the difference between dual-frequency relaxation $R_{1\\rho}^{dual}$ and single-frequency $R_{1\\rho}^{single}$ relaxation measurements. A novel rotary-echo spin-lock sequence was developed"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2510.02847","kind":"arxiv","version":4},"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/2510.02847/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":"2026-06-23T01:11:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pY3hOVwX4bLuFRW9HD469afAkLWgDV8wn8VN2ebIegUX62GOwZvUXQV4fTmREhXN/PXtbpGbpVKKtfKraYRMCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-05T06:12:41.234273Z"},"content_sha256":"be4d5ebeeee801e4d82a8071d85b6546e70779aeae1fbb43595230aae48b3f8b","schema_version":"1.0","event_id":"sha256:be4d5ebeeee801e4d82a8071d85b6546e70779aeae1fbb43595230aae48b3f8b"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/H76EY2R7APGJ7TDSTSQMGKGTNN/bundle.json","state_url":"https://pith.science/pith/H76EY2R7APGJ7TDSTSQMGKGTNN/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/H76EY2R7APGJ7TDSTSQMGKGTNN/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":"2026-08-05T06:12:41Z","links":{"resolver":"https://pith.science/pith/H76EY2R7APGJ7TDSTSQMGKGTNN","bundle":"https://pith.science/pith/H76EY2R7APGJ7TDSTSQMGKGTNN/bundle.json","state":"https://pith.science/pith/H76EY2R7APGJ7TDSTSQMGKGTNN/state.json","well_known_bundle":"https://pith.science/.well-known/pith/H76EY2R7APGJ7TDSTSQMGKGTNN/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:H76EY2R7APGJ7TDSTSQMGKGTNN","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":"43b79ead7af92e3d782b9cbb7a97978a35ddb8b4a2b536b00873e340896a5ff9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-10-03T09:34:06Z","title_canon_sha256":"be8d72bc101bc67f442d86002474c591387a5f9a31ac5c3f7aac7dd86cb09911"},"schema_version":"1.0","source":{"id":"2510.02847","kind":"arxiv","version":4}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2510.02847","created_at":"2026-06-23T01:11:57Z"},{"alias_kind":"arxiv_version","alias_value":"2510.02847v4","created_at":"2026-06-23T01:11:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2510.02847","created_at":"2026-06-23T01:11:57Z"},{"alias_kind":"pith_short_12","alias_value":"H76EY2R7APGJ","created_at":"2026-06-23T01:11:57Z"},{"alias_kind":"pith_short_16","alias_value":"H76EY2R7APGJ7TDS","created_at":"2026-06-23T01:11:57Z"},{"alias_kind":"pith_short_8","alias_value":"H76EY2R7","created_at":"2026-06-23T01:11:57Z"}],"graph_snapshots":[{"event_id":"sha256:be4d5ebeeee801e4d82a8071d85b6546e70779aeae1fbb43595230aae48b3f8b","target":"graph","created_at":"2026-06-23T01:11:57Z","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/2510.02847/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Purpose: Inhomogeneous magnetization transfer (ihMT) effect reflects dipolar order with a dipolar relaxation time ($T_{1D}$), specific to motion-restricted macromolecules. We aim to quantify $T_{1D}$ using spin-lock MRI technique. Methods: In the proposed method, we introduce a $T_{1D}$-specific ratio, denoted as $RATIO_{dosl}$. This ratio is derived from the distinct relaxation rate $R_{dosl}$, calculated as the difference between dual-frequency relaxation $R_{1\\rho}^{dual}$ and single-frequency $R_{1\\rho}^{single}$ relaxation measurements. A novel rotary-echo spin-lock sequence was developed","authors_text":"Qianxue Shan, Weitian Chen, Zijian Gao, Ziqiang Yu, Ziqin Zhou","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-10-03T09:34:06Z","title":"Dipolar order mapping based on spin-lock magnetic resonance imaging"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2510.02847","kind":"arxiv","version":4},"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":"sha256:2ec8418d528a8d717001d18e7db8f23b6895b989cb04e8b19447e8ec2d05fb4b","target":"record","created_at":"2026-06-23T01:11:57Z","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":"43b79ead7af92e3d782b9cbb7a97978a35ddb8b4a2b536b00873e340896a5ff9","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-10-03T09:34:06Z","title_canon_sha256":"be8d72bc101bc67f442d86002474c591387a5f9a31ac5c3f7aac7dd86cb09911"},"schema_version":"1.0","source":{"id":"2510.02847","kind":"arxiv","version":4}},"canonical_sha256":"3ffc4c6a3f03cc9fcc729ca0c328d36b65e316324928915bcb89ae3ad202dcce","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3ffc4c6a3f03cc9fcc729ca0c328d36b65e316324928915bcb89ae3ad202dcce","first_computed_at":"2026-06-23T01:11:57.472176Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-06-23T01:11:57.472176Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MsjLU7Q+RJkP+SxxV06QRi+75Q6uzHABHpy0na1ycPRTG6ix6lUc6wRzkkTmmkn3Qs3gZCG4Rh0qRt4V6bRnDQ==","signature_status":"signed_v1","signed_at":"2026-06-23T01:11:57.472728Z","signed_message":"canonical_sha256_bytes"},"source_id":"2510.02847","source_kind":"arxiv","source_version":4}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:2ec8418d528a8d717001d18e7db8f23b6895b989cb04e8b19447e8ec2d05fb4b","sha256:be4d5ebeeee801e4d82a8071d85b6546e70779aeae1fbb43595230aae48b3f8b"],"state_sha256":"763057300f18f003c738dfa68b79c64ca57520be1d45afa2e076cec5f1875c67"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"RyR/AYRztJE63bDkCVKXChqkn03lbk+NGOHUetZqH4E5O0mwp06gVAaR92bA2s79DQdRHdNVNYfIK8tps96PDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-05T06:12:41.238492Z","bundle_sha256":"59536342aa76dd3dffe121f581c39748529bb5d9dca724c9e92c132354e8f14e"}}