{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2015:T4GSGTEIW4NIHWAYU6UJGLN2LT","short_pith_number":"pith:T4GSGTEI","schema_version":"1.0","canonical_sha256":"9f0d234c88b71a83d818a7a8932dba5cd7367324abb64f05bdd4a76ba286530b","source":{"kind":"arxiv","id":"1504.06388","version":1},"attestation_state":"computed","paper":{"title":"Thickness Measurements from Single X-ray Phase-contrast Speckle Projection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Jingchen Ma, Jun Zhao, Rongbiao Tang, Yan Xi","submitted_at":"2015-04-24T04:19:13Z","abstract_excerpt":"We propose a one-shot thickness measurement method for sponge-like structures using a propagation-based X-ray phase-contrast imaging (P-PCI) method. In P-PCI, the air-material interface refracts the incident X-ray. Refracted many times along their paths by such a structure, incident X-rays propagate randomly within a small divergent angle range, resulting in a speckle pattern in the captured image. We found structure thickness and contrast of a phase-contrast projection are directly related in images. This relationship can be described by a natural logarithm equation. Thus, from the one phase-"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1504.06388","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2015-04-24T04:19:13Z","cross_cats_sorted":[],"title_canon_sha256":"280e0df19dc2739c6218558a0dc4b5a331bb7241ceb8f3943fe691ee20dcb7ac","abstract_canon_sha256":"085dea39efa7042ee38cbb325f3ab79bb696dbed251f6fce16836387907b1dc8"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T02:17:53.816079Z","signature_b64":"Tz+mqyuHAGjSUO9++39at7tbcJ2Uz0doU9dJzHUXCqELzy0CvqbcRrSVxv1RiNFKku4HEyHfulcT1IDD/0svBw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9f0d234c88b71a83d818a7a8932dba5cd7367324abb64f05bdd4a76ba286530b","last_reissued_at":"2026-05-18T02:17:53.815281Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T02:17:53.815281Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Thickness Measurements from Single X-ray Phase-contrast Speckle Projection","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Jingchen Ma, Jun Zhao, Rongbiao Tang, Yan Xi","submitted_at":"2015-04-24T04:19:13Z","abstract_excerpt":"We propose a one-shot thickness measurement method for sponge-like structures using a propagation-based X-ray phase-contrast imaging (P-PCI) method. In P-PCI, the air-material interface refracts the incident X-ray. Refracted many times along their paths by such a structure, incident X-rays propagate randomly within a small divergent angle range, resulting in a speckle pattern in the captured image. We found structure thickness and contrast of a phase-contrast projection are directly related in images. This relationship can be described by a natural logarithm equation. Thus, from the one phase-"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1504.06388","kind":"arxiv","version":1},"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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1504.06388","created_at":"2026-05-18T02:17:53.815403+00:00"},{"alias_kind":"arxiv_version","alias_value":"1504.06388v1","created_at":"2026-05-18T02:17:53.815403+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1504.06388","created_at":"2026-05-18T02:17:53.815403+00:00"},{"alias_kind":"pith_short_12","alias_value":"T4GSGTEIW4NI","created_at":"2026-05-18T12:29:42.218222+00:00"},{"alias_kind":"pith_short_16","alias_value":"T4GSGTEIW4NIHWAY","created_at":"2026-05-18T12:29:42.218222+00:00"},{"alias_kind":"pith_short_8","alias_value":"T4GSGTEI","created_at":"2026-05-18T12:29:42.218222+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/T4GSGTEIW4NIHWAYU6UJGLN2LT","json":"https://pith.science/pith/T4GSGTEIW4NIHWAYU6UJGLN2LT.json","graph_json":"https://pith.science/api/pith-number/T4GSGTEIW4NIHWAYU6UJGLN2LT/graph.json","events_json":"https://pith.science/api/pith-number/T4GSGTEIW4NIHWAYU6UJGLN2LT/events.json","paper":"https://pith.science/paper/T4GSGTEI"},"agent_actions":{"view_html":"https://pith.science/pith/T4GSGTEIW4NIHWAYU6UJGLN2LT","download_json":"https://pith.science/pith/T4GSGTEIW4NIHWAYU6UJGLN2LT.json","view_paper":"https://pith.science/paper/T4GSGTEI","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1504.06388&json=true","fetch_graph":"https://pith.science/api/pith-number/T4GSGTEIW4NIHWAYU6UJGLN2LT/graph.json","fetch_events":"https://pith.science/api/pith-number/T4GSGTEIW4NIHWAYU6UJGLN2LT/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/T4GSGTEIW4NIHWAYU6UJGLN2LT/action/timestamp_anchor","attest_storage":"https://pith.science/pith/T4GSGTEIW4NIHWAYU6UJGLN2LT/action/storage_attestation","attest_author":"https://pith.science/pith/T4GSGTEIW4NIHWAYU6UJGLN2LT/action/author_attestation","sign_citation":"https://pith.science/pith/T4GSGTEIW4NIHWAYU6UJGLN2LT/action/citation_signature","submit_replication":"https://pith.science/pith/T4GSGTEIW4NIHWAYU6UJGLN2LT/action/replication_record"}},"created_at":"2026-05-18T02:17:53.815403+00:00","updated_at":"2026-05-18T02:17:53.815403+00:00"}