{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2018:V7C7HXVXD4ULTSKFJ5JRUUXDWH","short_pith_number":"pith:V7C7HXVX","canonical_record":{"source":{"id":"1805.10007","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-05-25T07:09:19Z","cross_cats_sorted":[],"title_canon_sha256":"80d16bcb2f8f74e6e5b6805c3988303f6baad8aca9b43074c6e4155a94b5a920","abstract_canon_sha256":"7c5135a044abc8156213d859976018d50a0cfe24ff6de08fd749d25cb50b0941"},"schema_version":"1.0"},"canonical_sha256":"afc5f3deb71f28b9c9454f531a52e3b1f66eded9f24995efb9bb50d1df7fcc4d","source":{"kind":"arxiv","id":"1805.10007","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.10007","created_at":"2026-05-18T00:14:58Z"},{"alias_kind":"arxiv_version","alias_value":"1805.10007v1","created_at":"2026-05-18T00:14:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.10007","created_at":"2026-05-18T00:14:58Z"},{"alias_kind":"pith_short_12","alias_value":"V7C7HXVXD4UL","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"V7C7HXVXD4ULTSKF","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"V7C7HXVX","created_at":"2026-05-18T12:32:59Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2018:V7C7HXVXD4ULTSKFJ5JRUUXDWH","target":"record","payload":{"canonical_record":{"source":{"id":"1805.10007","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-05-25T07:09:19Z","cross_cats_sorted":[],"title_canon_sha256":"80d16bcb2f8f74e6e5b6805c3988303f6baad8aca9b43074c6e4155a94b5a920","abstract_canon_sha256":"7c5135a044abc8156213d859976018d50a0cfe24ff6de08fd749d25cb50b0941"},"schema_version":"1.0"},"canonical_sha256":"afc5f3deb71f28b9c9454f531a52e3b1f66eded9f24995efb9bb50d1df7fcc4d","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:14:58.510411Z","signature_b64":"pA2e0GjgSLUBiCETotVh50S5J4vyG23MSNVPD38Gn9aW0qtkRlndSAw8hYZpWok9iwUtDyBk6t95/WzSu9IKDw==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"afc5f3deb71f28b9c9454f531a52e3b1f66eded9f24995efb9bb50d1df7fcc4d","last_reissued_at":"2026-05-18T00:14:58.509734Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:14:58.509734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1805.10007","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":"2026-05-18T00:14:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"Nm2JlmA9uGjYx8sbesyFafqFGrJom3JHrpbyud+7cPmqPPjFCXuM4xhLdglGLuiuirSbcUeJPksyUcQtIx/dDw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T08:44:26.844673Z"},"content_sha256":"8c5d1729acac2ebd6fddb47be20c2f3941a7b2fbd96dd3d71dc962c486a6e1aa","schema_version":"1.0","event_id":"sha256:8c5d1729acac2ebd6fddb47be20c2f3941a7b2fbd96dd3d71dc962c486a6e1aa"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2018:V7C7HXVXD4ULTSKFJ5JRUUXDWH","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Enhanced 3D-printed holographic acoustic lens for aberration correction of single-element transcranial focused ultrasound","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Javier Redondo, JM Bravo, JV S\\'anchez-P\\'erez, Marcelino Ferri","submitted_at":"2018-05-25T07:09:19Z","abstract_excerpt":"The correction of the aberration of transcranial focused ultrasounds is a relevant issue for enhancing various non-invasive medical treatments. Emission through multi-element phased arrays has been the most widely accepted method to reduce aberrations in recent years; however, a new disruptive technology, based on 3D printed acoustic lenses, has recently been proposed with lower cost and comparable accuracy. The number and size of transducers in phased array configurations was a bottleneck limiting the focusing accuracy, but once the submillimeter precision of the latest generation 3D printers"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.10007","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":"2026-05-18T00:14:58Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yFXcKrVzhonXi+R3iePmgSzxKkbbgo5nF5ZWmKad1Unvf4/xzOJvzLogji3U0z84V03K5Tzf/nzMQZ2A9cOUDA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-06-05T08:44:26.845237Z"},"content_sha256":"49ec50e0937d510a4281c047d01592e8288395edf1515eb8a814bc7eeec93b75","schema_version":"1.0","event_id":"sha256:49ec50e0937d510a4281c047d01592e8288395edf1515eb8a814bc7eeec93b75"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/V7C7HXVXD4ULTSKFJ5JRUUXDWH/bundle.json","state_url":"https://pith.science/pith/V7C7HXVXD4ULTSKFJ5JRUUXDWH/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/V7C7HXVXD4ULTSKFJ5JRUUXDWH/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":"2026-06-05T08:44:26Z","links":{"resolver":"https://pith.science/pith/V7C7HXVXD4ULTSKFJ5JRUUXDWH","bundle":"https://pith.science/pith/V7C7HXVXD4ULTSKFJ5JRUUXDWH/bundle.json","state":"https://pith.science/pith/V7C7HXVXD4ULTSKFJ5JRUUXDWH/state.json","well_known_bundle":"https://pith.science/.well-known/pith/V7C7HXVXD4ULTSKFJ5JRUUXDWH/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:V7C7HXVXD4ULTSKFJ5JRUUXDWH","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":"7c5135a044abc8156213d859976018d50a0cfe24ff6de08fd749d25cb50b0941","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-05-25T07:09:19Z","title_canon_sha256":"80d16bcb2f8f74e6e5b6805c3988303f6baad8aca9b43074c6e4155a94b5a920"},"schema_version":"1.0","source":{"id":"1805.10007","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1805.10007","created_at":"2026-05-18T00:14:58Z"},{"alias_kind":"arxiv_version","alias_value":"1805.10007v1","created_at":"2026-05-18T00:14:58Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1805.10007","created_at":"2026-05-18T00:14:58Z"},{"alias_kind":"pith_short_12","alias_value":"V7C7HXVXD4UL","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_16","alias_value":"V7C7HXVXD4ULTSKF","created_at":"2026-05-18T12:32:59Z"},{"alias_kind":"pith_short_8","alias_value":"V7C7HXVX","created_at":"2026-05-18T12:32:59Z"}],"graph_snapshots":[{"event_id":"sha256:49ec50e0937d510a4281c047d01592e8288395edf1515eb8a814bc7eeec93b75","target":"graph","created_at":"2026-05-18T00:14:58Z","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":"The correction of the aberration of transcranial focused ultrasounds is a relevant issue for enhancing various non-invasive medical treatments. Emission through multi-element phased arrays has been the most widely accepted method to reduce aberrations in recent years; however, a new disruptive technology, based on 3D printed acoustic lenses, has recently been proposed with lower cost and comparable accuracy. The number and size of transducers in phased array configurations was a bottleneck limiting the focusing accuracy, but once the submillimeter precision of the latest generation 3D printers","authors_text":"Javier Redondo, JM Bravo, JV S\\'anchez-P\\'erez, Marcelino Ferri","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-05-25T07:09:19Z","title":"Enhanced 3D-printed holographic acoustic lens for aberration correction of single-element transcranial focused ultrasound"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1805.10007","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":"sha256:8c5d1729acac2ebd6fddb47be20c2f3941a7b2fbd96dd3d71dc962c486a6e1aa","target":"record","created_at":"2026-05-18T00:14:58Z","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":"7c5135a044abc8156213d859976018d50a0cfe24ff6de08fd749d25cb50b0941","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2018-05-25T07:09:19Z","title_canon_sha256":"80d16bcb2f8f74e6e5b6805c3988303f6baad8aca9b43074c6e4155a94b5a920"},"schema_version":"1.0","source":{"id":"1805.10007","kind":"arxiv","version":1}},"canonical_sha256":"afc5f3deb71f28b9c9454f531a52e3b1f66eded9f24995efb9bb50d1df7fcc4d","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"afc5f3deb71f28b9c9454f531a52e3b1f66eded9f24995efb9bb50d1df7fcc4d","first_computed_at":"2026-05-18T00:14:58.509734Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:14:58.509734Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"pA2e0GjgSLUBiCETotVh50S5J4vyG23MSNVPD38Gn9aW0qtkRlndSAw8hYZpWok9iwUtDyBk6t95/WzSu9IKDw==","signature_status":"signed_v1","signed_at":"2026-05-18T00:14:58.510411Z","signed_message":"canonical_sha256_bytes"},"source_id":"1805.10007","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:8c5d1729acac2ebd6fddb47be20c2f3941a7b2fbd96dd3d71dc962c486a6e1aa","sha256:49ec50e0937d510a4281c047d01592e8288395edf1515eb8a814bc7eeec93b75"],"state_sha256":"60046d0a270c95c431fca78cb5fc1eb545f46ed85a6a902871ae3804dc9e0afc"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"eAsQUrVLZV4hDyi3cwL7eIdo/LhYf7LWw0iUE0ddGz/rByIoQc12R305DolPnza0UHtO76sGGIvM4Gd4NtEAAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-06-05T08:44:26.848299Z","bundle_sha256":"7b1a4865262224fb27b93ed2eb0a4c27e8938e5d4c8c2126d97b78a3e6427cd4"}}