{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2024:UUETHUPZPANLCHJN6V3BPOB2WE","short_pith_number":"pith:UUETHUPZ","schema_version":"1.0","canonical_sha256":"a50933d1f9781ab11d2df57617b83ab10d6022d7976d5812c7fa2b68274c5cb1","source":{"kind":"arxiv","id":"2404.11633","version":1},"attestation_state":"computed","paper":{"title":"Review of speckle-tracking algorithms for x-ray phase contrast imaging: low dose applications","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.med-ph","authors_text":"Christopher Ninham, Emmanuel Brun, Laurene Quenot, Luca Fardin, Rafael Celestre","submitted_at":"2024-04-17T09:50:04Z","abstract_excerpt":"X-ray speckles have been used for a wide variety of experiments, ranging from imaging (and tomography), wavefront sensing, spatial coherence measurements all the way to x-ray photon correlation spectroscopy (XPCS) and ptychography. In the near-field regime, x-ray speckle-grains preserve shape and size under free-space propagation for a static random modulation of the illumination, which permits using them as wavefront markers. The introduction of an object in the modulated field will lead to a displacement of the speckles due to refraction. Retrieving the local displacements enables access to "},"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":"2404.11633","kind":"arxiv","version":1},"metadata":{"license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","primary_cat":"physics.med-ph","submitted_at":"2024-04-17T09:50:04Z","cross_cats_sorted":["physics.optics"],"title_canon_sha256":"0dc45e9bafbe1f691cd1238e4dd4626a1de106a2d3c3efb8cfaf1bc71c312913","abstract_canon_sha256":"4b73ccccecdb23454a24457cb9c5ba10ca0cd8728771a3eabbf13ab3e33ba22c"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T08:09:13.821839Z","signature_b64":"PxyRIDpdPL842ewjJ/HctjPUItaZPtHb7eJDjjIzC5LuYN3wGdbbzs+odIBAR3/7t030bW9vJaredQbV6uW8BQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"a50933d1f9781ab11d2df57617b83ab10d6022d7976d5812c7fa2b68274c5cb1","last_reissued_at":"2026-07-05T08:09:13.821396Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T08:09:13.821396Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Review of speckle-tracking algorithms for x-ray phase contrast imaging: low dose applications","license":"http://creativecommons.org/licenses/by-nc-sa/4.0/","headline":"","cross_cats":["physics.optics"],"primary_cat":"physics.med-ph","authors_text":"Christopher Ninham, Emmanuel Brun, Laurene Quenot, Luca Fardin, Rafael Celestre","submitted_at":"2024-04-17T09:50:04Z","abstract_excerpt":"X-ray speckles have been used for a wide variety of experiments, ranging from imaging (and tomography), wavefront sensing, spatial coherence measurements all the way to x-ray photon correlation spectroscopy (XPCS) and ptychography. In the near-field regime, x-ray speckle-grains preserve shape and size under free-space propagation for a static random modulation of the illumination, which permits using them as wavefront markers. The introduction of an object in the modulated field will lead to a displacement of the speckles due to refraction. Retrieving the local displacements enables access to "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2404.11633","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2404.11633/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"},"aliases":[{"alias_kind":"arxiv","alias_value":"2404.11633","created_at":"2026-07-05T08:09:13.821479+00:00"},{"alias_kind":"arxiv_version","alias_value":"2404.11633v1","created_at":"2026-07-05T08:09:13.821479+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2404.11633","created_at":"2026-07-05T08:09:13.821479+00:00"},{"alias_kind":"pith_short_12","alias_value":"UUETHUPZPANL","created_at":"2026-07-05T08:09:13.821479+00:00"},{"alias_kind":"pith_short_16","alias_value":"UUETHUPZPANLCHJN","created_at":"2026-07-05T08:09:13.821479+00:00"},{"alias_kind":"pith_short_8","alias_value":"UUETHUPZ","created_at":"2026-07-05T08:09:13.821479+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/UUETHUPZPANLCHJN6V3BPOB2WE","json":"https://pith.science/pith/UUETHUPZPANLCHJN6V3BPOB2WE.json","graph_json":"https://pith.science/api/pith-number/UUETHUPZPANLCHJN6V3BPOB2WE/graph.json","events_json":"https://pith.science/api/pith-number/UUETHUPZPANLCHJN6V3BPOB2WE/events.json","paper":"https://pith.science/paper/UUETHUPZ"},"agent_actions":{"view_html":"https://pith.science/pith/UUETHUPZPANLCHJN6V3BPOB2WE","download_json":"https://pith.science/pith/UUETHUPZPANLCHJN6V3BPOB2WE.json","view_paper":"https://pith.science/paper/UUETHUPZ","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2404.11633&json=true","fetch_graph":"https://pith.science/api/pith-number/UUETHUPZPANLCHJN6V3BPOB2WE/graph.json","fetch_events":"https://pith.science/api/pith-number/UUETHUPZPANLCHJN6V3BPOB2WE/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/UUETHUPZPANLCHJN6V3BPOB2WE/action/timestamp_anchor","attest_storage":"https://pith.science/pith/UUETHUPZPANLCHJN6V3BPOB2WE/action/storage_attestation","attest_author":"https://pith.science/pith/UUETHUPZPANLCHJN6V3BPOB2WE/action/author_attestation","sign_citation":"https://pith.science/pith/UUETHUPZPANLCHJN6V3BPOB2WE/action/citation_signature","submit_replication":"https://pith.science/pith/UUETHUPZPANLCHJN6V3BPOB2WE/action/replication_record"}},"created_at":"2026-07-05T08:09:13.821479+00:00","updated_at":"2026-07-05T08:09:13.821479+00:00"}