{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2022:TPE4FOAEXS47V4U46BLYZQ2IDA","short_pith_number":"pith:TPE4FOAE","schema_version":"1.0","canonical_sha256":"9bc9c2b804bcb9faf29cf0578cc34818115b2facb9f160c2074ee07b9aa94237","source":{"kind":"arxiv","id":"2203.16806","version":2},"attestation_state":"computed","paper":{"title":"Photoacoustic Imaging Based on AlN MF-PMUT with Broadened Bandwidth","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Daohuai Jiang, Fei Gao, Junxiang Cai, Liang Lou, Tao Wu, Yiyun Wang, Yuandong (Alex) Gu","submitted_at":"2022-03-31T05:23:45Z","abstract_excerpt":"This paper reports an aluminum nitride (AlN) multi-frequency piezoelectric micromachined ultrasound transducers (MF-PMUT) array for photoacoustic (PA) imaging, where the broadened bandwidth is beneficial to improve imaging resolution. Specifically, PMUT based on micro-electromechanical systems (MEMS) technology is suitable for PA endoscopic imaging of blood vessels and bronchi due to its miniature size. More importantly, AlN is a non-toxic material, which makes it harmless for biomedical applications. In this work, a MF-PMUT array are designed and fabricated for PAI. The device's vibration mod"},"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":"2203.16806","kind":"arxiv","version":2},"metadata":{"license":"http://creativecommons.org/licenses/by/4.0/","primary_cat":"physics.med-ph","submitted_at":"2022-03-31T05:23:45Z","cross_cats_sorted":[],"title_canon_sha256":"8f209085bbadc7c42808514c2b7e46b14fb82fef6c08ef756716208926de703d","abstract_canon_sha256":"bfd424bc3f992f4cc32b078763a32749246aabccf24cb77c1910a2560ef13a13"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T04:10:41.417119Z","signature_b64":"xt/CBY4BNMi4u/Pfs9twLbwjvnw21L/lvfSCP0sFUMUpwyaX1/0RPjaBDsXJ8/8Ef7bnP6Sspl+W67rWc5HWCA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"9bc9c2b804bcb9faf29cf0578cc34818115b2facb9f160c2074ee07b9aa94237","last_reissued_at":"2026-07-05T04:10:41.416652Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T04:10:41.416652Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"Photoacoustic Imaging Based on AlN MF-PMUT with Broadened Bandwidth","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Daohuai Jiang, Fei Gao, Junxiang Cai, Liang Lou, Tao Wu, Yiyun Wang, Yuandong (Alex) Gu","submitted_at":"2022-03-31T05:23:45Z","abstract_excerpt":"This paper reports an aluminum nitride (AlN) multi-frequency piezoelectric micromachined ultrasound transducers (MF-PMUT) array for photoacoustic (PA) imaging, where the broadened bandwidth is beneficial to improve imaging resolution. Specifically, PMUT based on micro-electromechanical systems (MEMS) technology is suitable for PA endoscopic imaging of blood vessels and bronchi due to its miniature size. More importantly, AlN is a non-toxic material, which makes it harmless for biomedical applications. In this work, a MF-PMUT array are designed and fabricated for PAI. The device's vibration mod"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.16806","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/2203.16806/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":"2203.16806","created_at":"2026-07-05T04:10:41.416712+00:00"},{"alias_kind":"arxiv_version","alias_value":"2203.16806v2","created_at":"2026-07-05T04:10:41.416712+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2203.16806","created_at":"2026-07-05T04:10:41.416712+00:00"},{"alias_kind":"pith_short_12","alias_value":"TPE4FOAEXS47","created_at":"2026-07-05T04:10:41.416712+00:00"},{"alias_kind":"pith_short_16","alias_value":"TPE4FOAEXS47V4U4","created_at":"2026-07-05T04:10:41.416712+00:00"},{"alias_kind":"pith_short_8","alias_value":"TPE4FOAE","created_at":"2026-07-05T04:10:41.416712+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/TPE4FOAEXS47V4U46BLYZQ2IDA","json":"https://pith.science/pith/TPE4FOAEXS47V4U46BLYZQ2IDA.json","graph_json":"https://pith.science/api/pith-number/TPE4FOAEXS47V4U46BLYZQ2IDA/graph.json","events_json":"https://pith.science/api/pith-number/TPE4FOAEXS47V4U46BLYZQ2IDA/events.json","paper":"https://pith.science/paper/TPE4FOAE"},"agent_actions":{"view_html":"https://pith.science/pith/TPE4FOAEXS47V4U46BLYZQ2IDA","download_json":"https://pith.science/pith/TPE4FOAEXS47V4U46BLYZQ2IDA.json","view_paper":"https://pith.science/paper/TPE4FOAE","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=2203.16806&json=true","fetch_graph":"https://pith.science/api/pith-number/TPE4FOAEXS47V4U46BLYZQ2IDA/graph.json","fetch_events":"https://pith.science/api/pith-number/TPE4FOAEXS47V4U46BLYZQ2IDA/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/TPE4FOAEXS47V4U46BLYZQ2IDA/action/timestamp_anchor","attest_storage":"https://pith.science/pith/TPE4FOAEXS47V4U46BLYZQ2IDA/action/storage_attestation","attest_author":"https://pith.science/pith/TPE4FOAEXS47V4U46BLYZQ2IDA/action/author_attestation","sign_citation":"https://pith.science/pith/TPE4FOAEXS47V4U46BLYZQ2IDA/action/citation_signature","submit_replication":"https://pith.science/pith/TPE4FOAEXS47V4U46BLYZQ2IDA/action/replication_record"}},"created_at":"2026-07-05T04:10:41.416712+00:00","updated_at":"2026-07-05T04:10:41.416712+00:00"}