{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:XPUZUBK7X3G3T3BNQM6T7GJYAT","short_pith_number":"pith:XPUZUBK7","canonical_record":{"source":{"id":"2506.00626","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-05-31T16:33:30Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"1908594a56b78542a4418aacaba4859981a13fab1bb9e77331fbd90a2f9a236b","abstract_canon_sha256":"c21c8b1339a56136bd9846bbcf23e0bc0152c9ca2fb792c7a3dd74d136e31d87"},"schema_version":"1.0"},"canonical_sha256":"bbe99a055fbecdb9ec2d833d3f993804cd352869f57d638fbec755ab9d18d5c1","source":{"kind":"arxiv","id":"2506.00626","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.00626","created_at":"2026-07-05T11:13:37Z"},{"alias_kind":"arxiv_version","alias_value":"2506.00626v1","created_at":"2026-07-05T11:13:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.00626","created_at":"2026-07-05T11:13:37Z"},{"alias_kind":"pith_short_12","alias_value":"XPUZUBK7X3G3","created_at":"2026-07-05T11:13:37Z"},{"alias_kind":"pith_short_16","alias_value":"XPUZUBK7X3G3T3BN","created_at":"2026-07-05T11:13:37Z"},{"alias_kind":"pith_short_8","alias_value":"XPUZUBK7","created_at":"2026-07-05T11:13:37Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:XPUZUBK7X3G3T3BNQM6T7GJYAT","target":"record","payload":{"canonical_record":{"source":{"id":"2506.00626","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-05-31T16:33:30Z","cross_cats_sorted":["eess.SP"],"title_canon_sha256":"1908594a56b78542a4418aacaba4859981a13fab1bb9e77331fbd90a2f9a236b","abstract_canon_sha256":"c21c8b1339a56136bd9846bbcf23e0bc0152c9ca2fb792c7a3dd74d136e31d87"},"schema_version":"1.0"},"canonical_sha256":"bbe99a055fbecdb9ec2d833d3f993804cd352869f57d638fbec755ab9d18d5c1","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T11:13:37.868062Z","signature_b64":"eUtMIhO7G3PkVeD+NDGj93N6RkkATXKyZdLZVb+h6fnyzGPD/2mWFsGhFj0cM3YUUHUX3hYOPpc1mEWtLq3WAA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"bbe99a055fbecdb9ec2d833d3f993804cd352869f57d638fbec755ab9d18d5c1","last_reissued_at":"2026-07-05T11:13:37.867588Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T11:13:37.867588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2506.00626","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":"2026-07-05T11:13:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"CV0I149n1oT4EeVmO6DatEWjNaCV+7LZfQa+aXINfVtXn7d+ff8Je/BkHZL4gq66pXHAWwR8lAlD6zhG8xMkDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:15:13.662782Z"},"content_sha256":"ed5c517f840ebb6dbca3b94d3df0973c71342e84791db057c522d033923ba5ed","schema_version":"1.0","event_id":"sha256:ed5c517f840ebb6dbca3b94d3df0973c71342e84791db057c522d033923ba5ed"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:XPUZUBK7X3G3T3BNQM6T7GJYAT","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Helmet ultrasound for brain imaging in post-hemicraniectomy patients","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["eess.SP"],"primary_cat":"physics.med-ph","authors_text":"Charles Y. Liu, Iyla Rossi, Jonathan J. Russin, Joshua Olick-Gibson, Karteekeya Sastry, Lihong V. Wang, Yang Zhang","submitted_at":"2025-05-31T16:33:30Z","abstract_excerpt":"Noninvasive imaging deep into the adult brain at submillimeter and millisecond scales remains a challenge in medical imaging. Here, we report a helmet based ultrasound brain imager built from a customized helmet, a scanned ultrasound array, and three dimensional printing for real time imaging of human brain anatomical and functional information. Through its application to post hemicraniectomy patients in a sitting position, we achieved volumetric brain tissue structural, vascular, and blood flow images at centimeter scale depths with submillimeter and millisecond spatiotemporal resolutions. We"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.00626","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/2506.00626/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"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T11:13:37Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"3xeCy9MIp/P7JYC84dbYbCE6HZ6R5t9D/ZtglMiKgAD+wFnXN7dpPdbV/JNcDrPmzwpJGfVJ85wvl15gC6yQCg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-07T11:15:13.663163Z"},"content_sha256":"35b8398e3d15d0c588d16980ba937d7ca52616720dc2a191ad8b7aedec1ab2f3","schema_version":"1.0","event_id":"sha256:35b8398e3d15d0c588d16980ba937d7ca52616720dc2a191ad8b7aedec1ab2f3"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/XPUZUBK7X3G3T3BNQM6T7GJYAT/bundle.json","state_url":"https://pith.science/pith/XPUZUBK7X3G3T3BNQM6T7GJYAT/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/XPUZUBK7X3G3T3BNQM6T7GJYAT/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":"2026-07-07T11:15:13Z","links":{"resolver":"https://pith.science/pith/XPUZUBK7X3G3T3BNQM6T7GJYAT","bundle":"https://pith.science/pith/XPUZUBK7X3G3T3BNQM6T7GJYAT/bundle.json","state":"https://pith.science/pith/XPUZUBK7X3G3T3BNQM6T7GJYAT/state.json","well_known_bundle":"https://pith.science/.well-known/pith/XPUZUBK7X3G3T3BNQM6T7GJYAT/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:XPUZUBK7X3G3T3BNQM6T7GJYAT","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":"c21c8b1339a56136bd9846bbcf23e0bc0152c9ca2fb792c7a3dd74d136e31d87","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-05-31T16:33:30Z","title_canon_sha256":"1908594a56b78542a4418aacaba4859981a13fab1bb9e77331fbd90a2f9a236b"},"schema_version":"1.0","source":{"id":"2506.00626","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2506.00626","created_at":"2026-07-05T11:13:37Z"},{"alias_kind":"arxiv_version","alias_value":"2506.00626v1","created_at":"2026-07-05T11:13:37Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2506.00626","created_at":"2026-07-05T11:13:37Z"},{"alias_kind":"pith_short_12","alias_value":"XPUZUBK7X3G3","created_at":"2026-07-05T11:13:37Z"},{"alias_kind":"pith_short_16","alias_value":"XPUZUBK7X3G3T3BN","created_at":"2026-07-05T11:13:37Z"},{"alias_kind":"pith_short_8","alias_value":"XPUZUBK7","created_at":"2026-07-05T11:13:37Z"}],"graph_snapshots":[{"event_id":"sha256:35b8398e3d15d0c588d16980ba937d7ca52616720dc2a191ad8b7aedec1ab2f3","target":"graph","created_at":"2026-07-05T11:13:37Z","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"},"integrity":{"available":true,"clean":true,"detectors_run":[],"endpoint":"/pith/2506.00626/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Noninvasive imaging deep into the adult brain at submillimeter and millisecond scales remains a challenge in medical imaging. Here, we report a helmet based ultrasound brain imager built from a customized helmet, a scanned ultrasound array, and three dimensional printing for real time imaging of human brain anatomical and functional information. Through its application to post hemicraniectomy patients in a sitting position, we achieved volumetric brain tissue structural, vascular, and blood flow images at centimeter scale depths with submillimeter and millisecond spatiotemporal resolutions. We","authors_text":"Charles Y. Liu, Iyla Rossi, Jonathan J. Russin, Joshua Olick-Gibson, Karteekeya Sastry, Lihong V. Wang, Yang Zhang","cross_cats":["eess.SP"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-05-31T16:33:30Z","title":"Helmet ultrasound for brain imaging in post-hemicraniectomy patients"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2506.00626","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:ed5c517f840ebb6dbca3b94d3df0973c71342e84791db057c522d033923ba5ed","target":"record","created_at":"2026-07-05T11:13:37Z","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":"c21c8b1339a56136bd9846bbcf23e0bc0152c9ca2fb792c7a3dd74d136e31d87","cross_cats_sorted":["eess.SP"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-05-31T16:33:30Z","title_canon_sha256":"1908594a56b78542a4418aacaba4859981a13fab1bb9e77331fbd90a2f9a236b"},"schema_version":"1.0","source":{"id":"2506.00626","kind":"arxiv","version":1}},"canonical_sha256":"bbe99a055fbecdb9ec2d833d3f993804cd352869f57d638fbec755ab9d18d5c1","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"bbe99a055fbecdb9ec2d833d3f993804cd352869f57d638fbec755ab9d18d5c1","first_computed_at":"2026-07-05T11:13:37.867588Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T11:13:37.867588Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"eUtMIhO7G3PkVeD+NDGj93N6RkkATXKyZdLZVb+h6fnyzGPD/2mWFsGhFj0cM3YUUHUX3hYOPpc1mEWtLq3WAA==","signature_status":"signed_v1","signed_at":"2026-07-05T11:13:37.868062Z","signed_message":"canonical_sha256_bytes"},"source_id":"2506.00626","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ed5c517f840ebb6dbca3b94d3df0973c71342e84791db057c522d033923ba5ed","sha256:35b8398e3d15d0c588d16980ba937d7ca52616720dc2a191ad8b7aedec1ab2f3"],"state_sha256":"650fbf93efae1538ef7bdce0d92cbef4fe9c45dafd2f4898c90c3794eeab88f5"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"qpoRggbC76dizA5ayZ7cm9n6AMhCTBpDIleyBOIlsvPl0foxX/vkEmSE9Xn0lwVD1xvkK6beP4Q9osdtEsAnDw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-07T11:15:13.665222Z","bundle_sha256":"55fc39d185c52a4b616978926d773f82bbdb2d3053c3170bb566026205df6fbd"}}