{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2022:2XDJS26FKPXJXTMQIP3NYLE2GZ","short_pith_number":"pith:2XDJS26F","canonical_record":{"source":{"id":"2202.10633","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2022-02-22T02:39:01Z","cross_cats_sorted":[],"title_canon_sha256":"dc8cd2fd42ecc09040f5040009dae03d0e4ef16130ee955eb72fb285ce49b638","abstract_canon_sha256":"33b5c20cf1608fa65c8b40a1d01a355945fbd9dd7a8782541e3d3117e72a6b72"},"schema_version":"1.0"},"canonical_sha256":"d5c6996bc553ee9bcd9043f6dc2c9a36454969a9d5be432f13afbdd2a844837c","source":{"kind":"arxiv","id":"2202.10633","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.10633","created_at":"2026-07-05T05:18:26Z"},{"alias_kind":"arxiv_version","alias_value":"2202.10633v2","created_at":"2026-07-05T05:18:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.10633","created_at":"2026-07-05T05:18:26Z"},{"alias_kind":"pith_short_12","alias_value":"2XDJS26FKPXJ","created_at":"2026-07-05T05:18:26Z"},{"alias_kind":"pith_short_16","alias_value":"2XDJS26FKPXJXTMQ","created_at":"2026-07-05T05:18:26Z"},{"alias_kind":"pith_short_8","alias_value":"2XDJS26F","created_at":"2026-07-05T05:18:26Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2022:2XDJS26FKPXJXTMQIP3NYLE2GZ","target":"record","payload":{"canonical_record":{"source":{"id":"2202.10633","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2022-02-22T02:39:01Z","cross_cats_sorted":[],"title_canon_sha256":"dc8cd2fd42ecc09040f5040009dae03d0e4ef16130ee955eb72fb285ce49b638","abstract_canon_sha256":"33b5c20cf1608fa65c8b40a1d01a355945fbd9dd7a8782541e3d3117e72a6b72"},"schema_version":"1.0"},"canonical_sha256":"d5c6996bc553ee9bcd9043f6dc2c9a36454969a9d5be432f13afbdd2a844837c","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T05:18:26.057876Z","signature_b64":"Fs3sxx/WezgV3vMDkdPQXEP7h0T+kjB7vxw6dsy36/wGTEaPLgQJw+0DpvGxWH7vhFxTV+m5ZxfN2OR8RGz3Bg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"d5c6996bc553ee9bcd9043f6dc2c9a36454969a9d5be432f13afbdd2a844837c","last_reissued_at":"2026-07-05T05:18:26.057389Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T05:18:26.057389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2202.10633","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-07-05T05:18:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"BsBgj91RAmG+NBpdJ7oUVBnUZvzWdx0Wm6TYYwB47kD8s+Rhwc9MDFrvcE7MYRq3qivxJid6iLF0onTtiiWxAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T10:42:14.876960Z"},"content_sha256":"e265989349875353c0dda167dd9733e36af09bda7248bc2732764b848866b278","schema_version":"1.0","event_id":"sha256:e265989349875353c0dda167dd9733e36af09bda7248bc2732764b848866b278"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2022:2XDJS26FKPXJXTMQIP3NYLE2GZ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Pulse-echo speed-of-sound imaging using convex probes","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Christophe Fraschini, Martin Frenz, Michael Jaeger, Naiara Korta Martiartu, Parisa Salemi Yolgunlu, Patrick St\\\"ahli, Thomas Frappart","submitted_at":"2022-02-22T02:39:01Z","abstract_excerpt":"Computed ultrasound tomography in echo mode (CUTE) is a new ultrasound (US)-based medical imaging modality with promise for diagnosing various types of disease based on the tissue's speed of sound (SoS). It is developed for conventional pulse-echo US using handheld probes and can thus be implemented in state-of-the-art medical US systems. One promising application is the quantification of the liver fat fraction in fatty liver disease. So far, CUTE was demonstrated using linear array probes where the imaging depth is comparable to the aperture size. For liver imaging, however, convex probes are"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.10633","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/2202.10633/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":"2026-07-05T05:18:26Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"someo2KqzD4seUGGU759ycBocyga3Ll9oTPzUKSom+Ehch9NyUN5sZvbX24CRDBpvFKqvWcT3Mo1md9rAVFcDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-07-10T10:42:14.877359Z"},"content_sha256":"91c1849eabcbdc6f016b1be7027bef3778ba5b68c4899f1c08bce965c4fb4baa","schema_version":"1.0","event_id":"sha256:91c1849eabcbdc6f016b1be7027bef3778ba5b68c4899f1c08bce965c4fb4baa"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/2XDJS26FKPXJXTMQIP3NYLE2GZ/bundle.json","state_url":"https://pith.science/pith/2XDJS26FKPXJXTMQIP3NYLE2GZ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/2XDJS26FKPXJXTMQIP3NYLE2GZ/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":"2026-07-10T10:42:14Z","links":{"resolver":"https://pith.science/pith/2XDJS26FKPXJXTMQIP3NYLE2GZ","bundle":"https://pith.science/pith/2XDJS26FKPXJXTMQIP3NYLE2GZ/bundle.json","state":"https://pith.science/pith/2XDJS26FKPXJXTMQIP3NYLE2GZ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/2XDJS26FKPXJXTMQIP3NYLE2GZ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2022:2XDJS26FKPXJXTMQIP3NYLE2GZ","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":"33b5c20cf1608fa65c8b40a1d01a355945fbd9dd7a8782541e3d3117e72a6b72","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2022-02-22T02:39:01Z","title_canon_sha256":"dc8cd2fd42ecc09040f5040009dae03d0e4ef16130ee955eb72fb285ce49b638"},"schema_version":"1.0","source":{"id":"2202.10633","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2202.10633","created_at":"2026-07-05T05:18:26Z"},{"alias_kind":"arxiv_version","alias_value":"2202.10633v2","created_at":"2026-07-05T05:18:26Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2202.10633","created_at":"2026-07-05T05:18:26Z"},{"alias_kind":"pith_short_12","alias_value":"2XDJS26FKPXJ","created_at":"2026-07-05T05:18:26Z"},{"alias_kind":"pith_short_16","alias_value":"2XDJS26FKPXJXTMQ","created_at":"2026-07-05T05:18:26Z"},{"alias_kind":"pith_short_8","alias_value":"2XDJS26F","created_at":"2026-07-05T05:18:26Z"}],"graph_snapshots":[{"event_id":"sha256:91c1849eabcbdc6f016b1be7027bef3778ba5b68c4899f1c08bce965c4fb4baa","target":"graph","created_at":"2026-07-05T05:18:26Z","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/2202.10633/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Computed ultrasound tomography in echo mode (CUTE) is a new ultrasound (US)-based medical imaging modality with promise for diagnosing various types of disease based on the tissue's speed of sound (SoS). It is developed for conventional pulse-echo US using handheld probes and can thus be implemented in state-of-the-art medical US systems. One promising application is the quantification of the liver fat fraction in fatty liver disease. So far, CUTE was demonstrated using linear array probes where the imaging depth is comparable to the aperture size. For liver imaging, however, convex probes are","authors_text":"Christophe Fraschini, Martin Frenz, Michael Jaeger, Naiara Korta Martiartu, Parisa Salemi Yolgunlu, Patrick St\\\"ahli, Thomas Frappart","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2022-02-22T02:39:01Z","title":"Pulse-echo speed-of-sound imaging using convex probes"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2202.10633","kind":"arxiv","version":2},"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:e265989349875353c0dda167dd9733e36af09bda7248bc2732764b848866b278","target":"record","created_at":"2026-07-05T05:18:26Z","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":"33b5c20cf1608fa65c8b40a1d01a355945fbd9dd7a8782541e3d3117e72a6b72","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2022-02-22T02:39:01Z","title_canon_sha256":"dc8cd2fd42ecc09040f5040009dae03d0e4ef16130ee955eb72fb285ce49b638"},"schema_version":"1.0","source":{"id":"2202.10633","kind":"arxiv","version":2}},"canonical_sha256":"d5c6996bc553ee9bcd9043f6dc2c9a36454969a9d5be432f13afbdd2a844837c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"d5c6996bc553ee9bcd9043f6dc2c9a36454969a9d5be432f13afbdd2a844837c","first_computed_at":"2026-07-05T05:18:26.057389Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T05:18:26.057389Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"Fs3sxx/WezgV3vMDkdPQXEP7h0T+kjB7vxw6dsy36/wGTEaPLgQJw+0DpvGxWH7vhFxTV+m5ZxfN2OR8RGz3Bg==","signature_status":"signed_v1","signed_at":"2026-07-05T05:18:26.057876Z","signed_message":"canonical_sha256_bytes"},"source_id":"2202.10633","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:e265989349875353c0dda167dd9733e36af09bda7248bc2732764b848866b278","sha256:91c1849eabcbdc6f016b1be7027bef3778ba5b68c4899f1c08bce965c4fb4baa"],"state_sha256":"02e05be9e1aa13686b5432bccf3fa6eb32caa99dfeab2280596733bcd2aaef6f"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"wTAO9qI4GlJ70p8fS/V2VqzhXmk71LuP8qyL3tvB3iDh1ljcY8VXBJoQ6Tyqg7y5DLdcNb87rSXSLUHB8uctCA==","signed_message":"bundle_sha256_bytes","signed_at":"2026-07-10T10:42:14.879181Z","bundle_sha256":"b77184e8d3dbb1e08ce9326fe896b946c942c5f522fa32cc8ef79614a61a69cb"}}