{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2023:HQH7JVGPU7JDVHO5CK57ATD3T4","short_pith_number":"pith:HQH7JVGP","canonical_record":{"source":{"id":"2306.09681","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2023-06-16T08:24:18Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"3f0ef2e80d621a56fde37eed3d5716f50d0ebc37d9e481eeceb542f84e8135a8","abstract_canon_sha256":"cd74e954daef2d0b921b492d77a59da0dc555df8759cb760a61f7f1195d61194"},"schema_version":"1.0"},"canonical_sha256":"3c0ff4d4cfa7d23a9ddd12bbf04c7b9f2e0374e6655791798e7154c56ab1cd1b","source":{"kind":"arxiv","id":"2306.09681","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.09681","created_at":"2026-07-05T06:58:57Z"},{"alias_kind":"arxiv_version","alias_value":"2306.09681v2","created_at":"2026-07-05T06:58:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.09681","created_at":"2026-07-05T06:58:57Z"},{"alias_kind":"pith_short_12","alias_value":"HQH7JVGPU7JD","created_at":"2026-07-05T06:58:57Z"},{"alias_kind":"pith_short_16","alias_value":"HQH7JVGPU7JDVHO5","created_at":"2026-07-05T06:58:57Z"},{"alias_kind":"pith_short_8","alias_value":"HQH7JVGP","created_at":"2026-07-05T06:58:57Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2023:HQH7JVGPU7JDVHO5CK57ATD3T4","target":"record","payload":{"canonical_record":{"source":{"id":"2306.09681","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2023-06-16T08:24:18Z","cross_cats_sorted":["cs.LG"],"title_canon_sha256":"3f0ef2e80d621a56fde37eed3d5716f50d0ebc37d9e481eeceb542f84e8135a8","abstract_canon_sha256":"cd74e954daef2d0b921b492d77a59da0dc555df8759cb760a61f7f1195d61194"},"schema_version":"1.0"},"canonical_sha256":"3c0ff4d4cfa7d23a9ddd12bbf04c7b9f2e0374e6655791798e7154c56ab1cd1b","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T06:58:57.598536Z","signature_b64":"+ruWUGZjTrayGIy4hfpx70QE0fvbiS826Wk6TZxl7kV+ZajxkScCg+3mtd7AtZNw5t3Ivfj/c51tFnHnCXf8BA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3c0ff4d4cfa7d23a9ddd12bbf04c7b9f2e0374e6655791798e7154c56ab1cd1b","last_reissued_at":"2026-07-05T06:58:57.598044Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T06:58:57.598044Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2306.09681","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":"2026-07-05T06:58:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"FB5aMMaAykf0cq3/GP579saraIbxWh14dvo6/lHWU5b3+eHsQkMU312wBLYJHpz6gBsQePrjnVhl109Ogg/nCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T21:29:30.237230Z"},"content_sha256":"e241a7f053fa137523698238d1e92ddb1842365fa61420e2871dd13200674382","schema_version":"1.0","event_id":"sha256:e241a7f053fa137523698238d1e92ddb1842365fa61420e2871dd13200674382"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2023:HQH7JVGPU7JDVHO5CK57ATD3T4","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Magnetic Resonance Spectroscopy Quantification Aided by Deep Estimations of Imperfection Factors and Macromolecular Signal","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.LG"],"primary_cat":"physics.med-ph","authors_text":"Dicheng Chen, Di Guo, Huiting Liu, Jianzhong Lin, Jiayu Li, Jiazheng Wang, Jing Li, Liangjie Lin, Meijin Lin, Taishan Kang, Xiaobo Qu, Xi Chen, Yirong Zhou, Zhigang Wu","submitted_at":"2023-06-16T08:24:18Z","abstract_excerpt":"Objective: Magnetic Resonance Spectroscopy (MRS) is an important technique for biomedical detection. However, it is challenging to accurately quantify metabolites with proton MRS due to serious overlaps of metabolite signals, imperfections because of non-ideal acquisition conditions, and interference with strong background signals mainly from macromolecules. The most popular method, LCModel, adopts complicated non-linear least square to quantify metabolites and addresses these problems by designing empirical priors such as basis-sets, imperfection factors. However, when the signal-to-noise rat"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.09681","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2306.09681/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":"2026-07-05T06:58:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"IIUaqnNhmJU7902a++bh+O2ogNVdVRKA5W00I5P/j5OFvFT7athkZhqTNF+sXVH4jnXH7d7CFACVx9OHtPCNAA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T21:29:30.237828Z"},"content_sha256":"69b8280d90b51029623627eccd48c4b24e7a68919568037af0e101da9cc8b534","schema_version":"1.0","event_id":"sha256:69b8280d90b51029623627eccd48c4b24e7a68919568037af0e101da9cc8b534"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HQH7JVGPU7JDVHO5CK57ATD3T4/bundle.json","state_url":"https://pith.science/pith/HQH7JVGPU7JDVHO5CK57ATD3T4/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HQH7JVGPU7JDVHO5CK57ATD3T4/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":"2026-08-06T21:29:30Z","links":{"resolver":"https://pith.science/pith/HQH7JVGPU7JDVHO5CK57ATD3T4","bundle":"https://pith.science/pith/HQH7JVGPU7JDVHO5CK57ATD3T4/bundle.json","state":"https://pith.science/pith/HQH7JVGPU7JDVHO5CK57ATD3T4/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HQH7JVGPU7JDVHO5CK57ATD3T4/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2023:HQH7JVGPU7JDVHO5CK57ATD3T4","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":"cd74e954daef2d0b921b492d77a59da0dc555df8759cb760a61f7f1195d61194","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2023-06-16T08:24:18Z","title_canon_sha256":"3f0ef2e80d621a56fde37eed3d5716f50d0ebc37d9e481eeceb542f84e8135a8"},"schema_version":"1.0","source":{"id":"2306.09681","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2306.09681","created_at":"2026-07-05T06:58:57Z"},{"alias_kind":"arxiv_version","alias_value":"2306.09681v2","created_at":"2026-07-05T06:58:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2306.09681","created_at":"2026-07-05T06:58:57Z"},{"alias_kind":"pith_short_12","alias_value":"HQH7JVGPU7JD","created_at":"2026-07-05T06:58:57Z"},{"alias_kind":"pith_short_16","alias_value":"HQH7JVGPU7JDVHO5","created_at":"2026-07-05T06:58:57Z"},{"alias_kind":"pith_short_8","alias_value":"HQH7JVGP","created_at":"2026-07-05T06:58:57Z"}],"graph_snapshots":[{"event_id":"sha256:69b8280d90b51029623627eccd48c4b24e7a68919568037af0e101da9cc8b534","target":"graph","created_at":"2026-07-05T06:58:57Z","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/2306.09681/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Objective: Magnetic Resonance Spectroscopy (MRS) is an important technique for biomedical detection. However, it is challenging to accurately quantify metabolites with proton MRS due to serious overlaps of metabolite signals, imperfections because of non-ideal acquisition conditions, and interference with strong background signals mainly from macromolecules. The most popular method, LCModel, adopts complicated non-linear least square to quantify metabolites and addresses these problems by designing empirical priors such as basis-sets, imperfection factors. However, when the signal-to-noise rat","authors_text":"Dicheng Chen, Di Guo, Huiting Liu, Jianzhong Lin, Jiayu Li, Jiazheng Wang, Jing Li, Liangjie Lin, Meijin Lin, Taishan Kang, Xiaobo Qu, Xi Chen, Yirong Zhou, Zhigang Wu","cross_cats":["cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2023-06-16T08:24:18Z","title":"Magnetic Resonance Spectroscopy Quantification Aided by Deep Estimations of Imperfection Factors and Macromolecular Signal"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2306.09681","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:e241a7f053fa137523698238d1e92ddb1842365fa61420e2871dd13200674382","target":"record","created_at":"2026-07-05T06:58:57Z","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":"cd74e954daef2d0b921b492d77a59da0dc555df8759cb760a61f7f1195d61194","cross_cats_sorted":["cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2023-06-16T08:24:18Z","title_canon_sha256":"3f0ef2e80d621a56fde37eed3d5716f50d0ebc37d9e481eeceb542f84e8135a8"},"schema_version":"1.0","source":{"id":"2306.09681","kind":"arxiv","version":2}},"canonical_sha256":"3c0ff4d4cfa7d23a9ddd12bbf04c7b9f2e0374e6655791798e7154c56ab1cd1b","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3c0ff4d4cfa7d23a9ddd12bbf04c7b9f2e0374e6655791798e7154c56ab1cd1b","first_computed_at":"2026-07-05T06:58:57.598044Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T06:58:57.598044Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"+ruWUGZjTrayGIy4hfpx70QE0fvbiS826Wk6TZxl7kV+ZajxkScCg+3mtd7AtZNw5t3Ivfj/c51tFnHnCXf8BA==","signature_status":"signed_v1","signed_at":"2026-07-05T06:58:57.598536Z","signed_message":"canonical_sha256_bytes"},"source_id":"2306.09681","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e241a7f053fa137523698238d1e92ddb1842365fa61420e2871dd13200674382","sha256:69b8280d90b51029623627eccd48c4b24e7a68919568037af0e101da9cc8b534"],"state_sha256":"a7c725e3ec8319477d78481ec437d015d3c9385ccd370d9610994dd200c798c9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"l8xRs5t0BVOj6GJRDDe9FodXwGMhUXwcL5uPwQiNxIfJdKMOzSe2No2m8fP6u+s7vB5XDcVHPHjo8qAXmRukCw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T21:29:30.243476Z","bundle_sha256":"6dde382b475d519c6f25ae636df880e7d85febdfe2051f413d6944acbea1eca3"}}