{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2014:SA6LD7X5RVAKYFO7J3WOJLANHE","short_pith_number":"pith:SA6LD7X5","canonical_record":{"source":{"id":"1412.7262","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-12-23T06:24:38Z","cross_cats_sorted":["physics.ins-det","physics.med-ph"],"title_canon_sha256":"01d8b0759cd9bf70da7e09c9d82468435264fe66fbaa759a28453ee3fc028255","abstract_canon_sha256":"e40b35dc0c0f38fbc5de4337e05b962b87b963d6c65d9de48d2e2ee1171b3e5b"},"schema_version":"1.0"},"canonical_sha256":"903cb1fefd8d40ac15df4eece4ac0d390db0e51336c3c8c59ffb1a4c32440a02","source":{"kind":"arxiv","id":"1412.7262","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.7262","created_at":"2026-05-18T01:22:14Z"},{"alias_kind":"arxiv_version","alias_value":"1412.7262v1","created_at":"2026-05-18T01:22:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.7262","created_at":"2026-05-18T01:22:14Z"},{"alias_kind":"pith_short_12","alias_value":"SA6LD7X5RVAK","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"SA6LD7X5RVAKYFO7","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"SA6LD7X5","created_at":"2026-05-18T12:28:49Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2014:SA6LD7X5RVAKYFO7J3WOJLANHE","target":"record","payload":{"canonical_record":{"source":{"id":"1412.7262","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-12-23T06:24:38Z","cross_cats_sorted":["physics.ins-det","physics.med-ph"],"title_canon_sha256":"01d8b0759cd9bf70da7e09c9d82468435264fe66fbaa759a28453ee3fc028255","abstract_canon_sha256":"e40b35dc0c0f38fbc5de4337e05b962b87b963d6c65d9de48d2e2ee1171b3e5b"},"schema_version":"1.0"},"canonical_sha256":"903cb1fefd8d40ac15df4eece4ac0d390db0e51336c3c8c59ffb1a4c32440a02","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:22:14.781598Z","signature_b64":"zYo4t07iTpOIKEKKe8Wfdwi2W/2LWszobIbAgvbhj03k/0+bArKdWkR4Y5TVYdlzEkcMVoOHQfU6427mRyAUCQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"903cb1fefd8d40ac15df4eece4ac0d390db0e51336c3c8c59ffb1a4c32440a02","last_reissued_at":"2026-05-18T01:22:14.780841Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:22:14.780841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1412.7262","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:22:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"juVwAppsmEXgxkwTlJE9zsDZ1Cgx7apIdrrmGN9gjjv4QUdAxW+eJmCmXJ+YFiVr4oGKeDxt7PcPN9981UzUBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T02:52:57.888721Z"},"content_sha256":"0dfda8c01d0e7c966eb2907823313fe79965e6d8c3fa3e773f2bbd552857d921","schema_version":"1.0","event_id":"sha256:0dfda8c01d0e7c966eb2907823313fe79965e6d8c3fa3e773f2bbd552857d921"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2014:SA6LD7X5RVAKYFO7J3WOJLANHE","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Photoacoustics meets ultrasound: micro-Doppler photoacoustic effect and detection by ultrasound","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det","physics.med-ph"],"primary_cat":"physics.optics","authors_text":"Claus-Dieter Ohl, Fei Gao, Xiaohua Feng, Yuanjin Zheng","submitted_at":"2014-12-23T06:24:38Z","abstract_excerpt":"In recent years, photoacoustics has attracted intensive research for both anatomical and functional biomedical imaging. However, the physical interaction between photoacoustic generated endogenous waves and an exogenous ultrasound wave is a largely unexplored area. Here, we report the initial results about the interaction of photoacoustic and external ultrasound waves leading to a micro-Doppler photoacoustic (mDPA) effect, which is experimentally observed and consistently modelled. It is based on a simultaneous excitation on the target with a pulsed laser and continuous wave (CW) ultrasound. T"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.7262","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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:22:14Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"9LupoVGXJV4ydJIQc3KI0ZJaQpjlNTiz8IrgCUSj2wZ2r+tc9UlflDa06iKQIcyIrGGzk4CwNszUkUCmvF46Cg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-03T02:52:57.889072Z"},"content_sha256":"8760dab3ed48e6068c0578d55e3945ab0b63f7c1b425c0092058003757f71a12","schema_version":"1.0","event_id":"sha256:8760dab3ed48e6068c0578d55e3945ab0b63f7c1b425c0092058003757f71a12"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/SA6LD7X5RVAKYFO7J3WOJLANHE/bundle.json","state_url":"https://pith.science/pith/SA6LD7X5RVAKYFO7J3WOJLANHE/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/SA6LD7X5RVAKYFO7J3WOJLANHE/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-06-03T02:52:57Z","links":{"resolver":"https://pith.science/pith/SA6LD7X5RVAKYFO7J3WOJLANHE","bundle":"https://pith.science/pith/SA6LD7X5RVAKYFO7J3WOJLANHE/bundle.json","state":"https://pith.science/pith/SA6LD7X5RVAKYFO7J3WOJLANHE/state.json","well_known_bundle":"https://pith.science/.well-known/pith/SA6LD7X5RVAKYFO7J3WOJLANHE/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2014:SA6LD7X5RVAKYFO7J3WOJLANHE","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":"e40b35dc0c0f38fbc5de4337e05b962b87b963d6c65d9de48d2e2ee1171b3e5b","cross_cats_sorted":["physics.ins-det","physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-12-23T06:24:38Z","title_canon_sha256":"01d8b0759cd9bf70da7e09c9d82468435264fe66fbaa759a28453ee3fc028255"},"schema_version":"1.0","source":{"id":"1412.7262","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1412.7262","created_at":"2026-05-18T01:22:14Z"},{"alias_kind":"arxiv_version","alias_value":"1412.7262v1","created_at":"2026-05-18T01:22:14Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1412.7262","created_at":"2026-05-18T01:22:14Z"},{"alias_kind":"pith_short_12","alias_value":"SA6LD7X5RVAK","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_16","alias_value":"SA6LD7X5RVAKYFO7","created_at":"2026-05-18T12:28:49Z"},{"alias_kind":"pith_short_8","alias_value":"SA6LD7X5","created_at":"2026-05-18T12:28:49Z"}],"graph_snapshots":[{"event_id":"sha256:8760dab3ed48e6068c0578d55e3945ab0b63f7c1b425c0092058003757f71a12","target":"graph","created_at":"2026-05-18T01:22:14Z","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"},"paper":{"abstract_excerpt":"In recent years, photoacoustics has attracted intensive research for both anatomical and functional biomedical imaging. However, the physical interaction between photoacoustic generated endogenous waves and an exogenous ultrasound wave is a largely unexplored area. Here, we report the initial results about the interaction of photoacoustic and external ultrasound waves leading to a micro-Doppler photoacoustic (mDPA) effect, which is experimentally observed and consistently modelled. It is based on a simultaneous excitation on the target with a pulsed laser and continuous wave (CW) ultrasound. T","authors_text":"Claus-Dieter Ohl, Fei Gao, Xiaohua Feng, Yuanjin Zheng","cross_cats":["physics.ins-det","physics.med-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-12-23T06:24:38Z","title":"Photoacoustics meets ultrasound: micro-Doppler photoacoustic effect and detection by ultrasound"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1412.7262","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":"sha256:0dfda8c01d0e7c966eb2907823313fe79965e6d8c3fa3e773f2bbd552857d921","target":"record","created_at":"2026-05-18T01:22:14Z","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":"e40b35dc0c0f38fbc5de4337e05b962b87b963d6c65d9de48d2e2ee1171b3e5b","cross_cats_sorted":["physics.ins-det","physics.med-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.optics","submitted_at":"2014-12-23T06:24:38Z","title_canon_sha256":"01d8b0759cd9bf70da7e09c9d82468435264fe66fbaa759a28453ee3fc028255"},"schema_version":"1.0","source":{"id":"1412.7262","kind":"arxiv","version":1}},"canonical_sha256":"903cb1fefd8d40ac15df4eece4ac0d390db0e51336c3c8c59ffb1a4c32440a02","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"903cb1fefd8d40ac15df4eece4ac0d390db0e51336c3c8c59ffb1a4c32440a02","first_computed_at":"2026-05-18T01:22:14.780841Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:22:14.780841Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"zYo4t07iTpOIKEKKe8Wfdwi2W/2LWszobIbAgvbhj03k/0+bArKdWkR4Y5TVYdlzEkcMVoOHQfU6427mRyAUCQ==","signature_status":"signed_v1","signed_at":"2026-05-18T01:22:14.781598Z","signed_message":"canonical_sha256_bytes"},"source_id":"1412.7262","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0dfda8c01d0e7c966eb2907823313fe79965e6d8c3fa3e773f2bbd552857d921","sha256:8760dab3ed48e6068c0578d55e3945ab0b63f7c1b425c0092058003757f71a12"],"state_sha256":"57ad50aadcb02e6947f90028a103141a8004f426002ce1d7eec03aa143c38153"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"rFluFKZwDZWhozSv6iwJFzknfzx8CM4JQVe1HI/I28pGsnuUyVxqub0WgmA1r0Lsml3+GpaWaMCL2DKyMRONDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-03T02:52:57.891180Z","bundle_sha256":"23129c4e1692bdb1d545f0016eefff0d819f772192c6df87cc8521d2133b6211"}}