{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:65RTCO2IR6QRSDTZPQMTCFX5CF","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":"79af4771ff3694c83923582889fb9fa2d9dd38ead7d7e5671c336cc9c9e0c06c","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-03-28T12:52:59Z","title_canon_sha256":"459c5dbc74cc98d859cd90e5da89dd4330d7dece5906fe5062448257ce9c4536"},"schema_version":"1.0","source":{"id":"2503.22392","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2503.22392","created_at":"2026-07-05T10:41:04Z"},{"alias_kind":"arxiv_version","alias_value":"2503.22392v1","created_at":"2026-07-05T10:41:04Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2503.22392","created_at":"2026-07-05T10:41:04Z"},{"alias_kind":"pith_short_12","alias_value":"65RTCO2IR6QR","created_at":"2026-07-05T10:41:04Z"},{"alias_kind":"pith_short_16","alias_value":"65RTCO2IR6QRSDTZ","created_at":"2026-07-05T10:41:04Z"},{"alias_kind":"pith_short_8","alias_value":"65RTCO2I","created_at":"2026-07-05T10:41:04Z"}],"graph_snapshots":[{"event_id":"sha256:a7a436583507c887fe71c570b70bc0f7a3f17787ed1e503dfe1bd9c5d3ce4584","target":"graph","created_at":"2026-07-05T10:41:04Z","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/2503.22392/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"We have previously introduced Spectral Diffusion Posterior Sampling (Spectral DPS) as a framework for accurate one-step material decomposition by integrating analytic spectral system models with priors learned from large datasets. This work extends the 2D Spectral DPS algorithm to 3D by addressing potentially limiting large-memory requirements with a pre-trained 2D diffusion model for slice-by-slice processing and a compressed polychromatic forward model to ensure accurate physical modeling. Simulation studies demonstrate that the proposed memory-efficient 3D Spectral DPS enables material deco","authors_text":"Grace J. Gang, J. Webster Stayman, Xiao Jiang","cross_cats":["eess.IV"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-03-28T12:52:59Z","title":"Volumetric Material Decomposition Using Spectral Diffusion Posterior Sampling with a Compressed Polychromatic Forward Model"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2503.22392","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:b3ffa4573f78e414f5f5ab02cdfb0ae925e59a75da14a0f9aab4b5a910f06797","target":"record","created_at":"2026-07-05T10:41:04Z","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":"79af4771ff3694c83923582889fb9fa2d9dd38ead7d7e5671c336cc9c9e0c06c","cross_cats_sorted":["eess.IV"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-03-28T12:52:59Z","title_canon_sha256":"459c5dbc74cc98d859cd90e5da89dd4330d7dece5906fe5062448257ce9c4536"},"schema_version":"1.0","source":{"id":"2503.22392","kind":"arxiv","version":1}},"canonical_sha256":"f763313b488fa1190e797c193116fd1171f20c68d7c73d96f10295e32c2fed9d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"f763313b488fa1190e797c193116fd1171f20c68d7c73d96f10295e32c2fed9d","first_computed_at":"2026-07-05T10:41:04.162527Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:41:04.162527Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"f/T/iPQxbYgOh3wQWddmyBLvFRj5Z6pRvGcXtinQrZ9XxzdTXwni2XKWZGqZ1dqemkk9/7dU+j2B79ynsRWhBw==","signature_status":"signed_v1","signed_at":"2026-07-05T10:41:04.163016Z","signed_message":"canonical_sha256_bytes"},"source_id":"2503.22392","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:b3ffa4573f78e414f5f5ab02cdfb0ae925e59a75da14a0f9aab4b5a910f06797","sha256:a7a436583507c887fe71c570b70bc0f7a3f17787ed1e503dfe1bd9c5d3ce4584"],"state_sha256":"862c6df8b05831de09939a8b3e669507f08d95a8d5c9a917ed312cbdb1d86434"}