{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:IBDERPNJ24EMVHISP33GBRHESU","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":"ce88add5f3af9d5fe453c3241cd5f4dc24aec9d0e0a34da5b292248320b2e6b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2021-03-18T21:51:58Z","title_canon_sha256":"5bbea5e9e60c13d279ba98eb9cbf7c80f4f2f9b115c567741daaf08c086ee936"},"schema_version":"1.0","source":{"id":"2103.10541","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2103.10541","created_at":"2026-07-05T02:24:42Z"},{"alias_kind":"arxiv_version","alias_value":"2103.10541v1","created_at":"2026-07-05T02:24:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2103.10541","created_at":"2026-07-05T02:24:42Z"},{"alias_kind":"pith_short_12","alias_value":"IBDERPNJ24EM","created_at":"2026-07-05T02:24:42Z"},{"alias_kind":"pith_short_16","alias_value":"IBDERPNJ24EMVHIS","created_at":"2026-07-05T02:24:42Z"},{"alias_kind":"pith_short_8","alias_value":"IBDERPNJ","created_at":"2026-07-05T02:24:42Z"}],"graph_snapshots":[{"event_id":"sha256:c946d61dc13d90cf7d17bf2fe259c26b1c953ddc16911c5c164773e489e6b51c","target":"graph","created_at":"2026-07-05T02:24:42Z","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/2103.10541/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"In this study, 18F-FDG PET/CT brain scans of 50 patients with head and neck malignant lesions were employed to systematically assess the relationship between the amount of injected dose (10%, 8%, 6%, 5%, 4%, 3%, 2%, and 1% of standard dose) and the image quality through measuring standard image quality metrics (peak-signal-to-noise-ration (PSNR), structural similarity index (SSIM), root mean square error (RMSE), and standard uptake value (SUV) bias) for the whole head region as well as within the malignant lesions, considering the standard-dose PET images as reference. Furthermore, we evaluate","authors_text":"Behnoush Sanaei, Hossein Arabi, Reza Faghihi","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2021-03-18T21:51:58Z","title":"Quantitative investigation of low-dose PET imaging and post-reconstruction smoothing"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2103.10541","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":"sha256:9c4f0584b14f6d1b20a0f0550d9d2f493158338a8bd0d492f326671463536df1","target":"record","created_at":"2026-07-05T02:24:42Z","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":"ce88add5f3af9d5fe453c3241cd5f4dc24aec9d0e0a34da5b292248320b2e6b5","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2021-03-18T21:51:58Z","title_canon_sha256":"5bbea5e9e60c13d279ba98eb9cbf7c80f4f2f9b115c567741daaf08c086ee936"},"schema_version":"1.0","source":{"id":"2103.10541","kind":"arxiv","version":1}},"canonical_sha256":"404648bda9d708ca9d127ef660c4e4953f40177b543e1c63264e00cfc8dfc900","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"404648bda9d708ca9d127ef660c4e4953f40177b543e1c63264e00cfc8dfc900","first_computed_at":"2026-07-05T02:24:42.365737Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:24:42.365737Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"MEhuH0jgO4mCxs9Z/KkaJPlKVDj6V01ZgzYxeRHdX3dvbxxbR4AI1G+9c829VBp1e2hNLV4XRJlcH7DCF474Dg==","signature_status":"signed_v1","signed_at":"2026-07-05T02:24:42.366134Z","signed_message":"canonical_sha256_bytes"},"source_id":"2103.10541","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9c4f0584b14f6d1b20a0f0550d9d2f493158338a8bd0d492f326671463536df1","sha256:c946d61dc13d90cf7d17bf2fe259c26b1c953ddc16911c5c164773e489e6b51c"],"state_sha256":"5334d9812c83fc4ae7f3f3c9a1ba942864dbf71b71356c454589716958d6adfe"}