{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2016:JUCMDAHSTILTFKODYXF3U5HRBU","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":"953f161d809fc1c6214315e01ab9aa92cbfeda61118131356955614845d2c802","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2016-09-06T10:56:13Z","title_canon_sha256":"ed40c49be772be5c875e7a61c77d1f0f843ae562cb93efffa34b067fd1541408"},"schema_version":"1.0","source":{"id":"1609.01483","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1609.01483","created_at":"2026-05-18T01:05:39Z"},{"alias_kind":"arxiv_version","alias_value":"1609.01483v1","created_at":"2026-05-18T01:05:39Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1609.01483","created_at":"2026-05-18T01:05:39Z"},{"alias_kind":"pith_short_12","alias_value":"JUCMDAHSTILT","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_16","alias_value":"JUCMDAHSTILTFKOD","created_at":"2026-05-18T12:30:25Z"},{"alias_kind":"pith_short_8","alias_value":"JUCMDAHS","created_at":"2026-05-18T12:30:25Z"}],"graph_snapshots":[{"event_id":"sha256:c2c873d52a004282ab177b35ad5dcd40d713d0f1bcf794b06430be01db313aea","target":"graph","created_at":"2026-05-18T01:05:39Z","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":"We propose a framework for extracting the bone surface from B-mode images employing the eigenspace minimum variance (ESMV) beamformer and a ridge detection method. We show that an ESMV beamformer with a rank-1 signal subspace can preserve the bone anatomy and enhance the edges, despite an image which is less visually appealing due to some speckle pattern distortion. The beamformed images are post-processed using the phase symmetry (PS) technique. We validate this framework by registering the ultrasound images of a vertebra (in a water bath) against the corresponding Computed Tomography (CT) da","authors_text":"Gabriel Kiss, Saeed Mehdizadeh, Sebastien Muller, Sverre Holm, Tonni F. Johansen","cross_cats":["physics.bio-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2016-09-06T10:56:13Z","title":"Joint Beamforming and Feature Detection for Enhanced Visualization of Spinal Bone Surfaces in Ultrasound Images"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1609.01483","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":"sha256:5d2104b9705e2f797b4e80105142575d2cf5c593581bbafd1e3a46fe223541d5","target":"record","created_at":"2026-05-18T01:05:39Z","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":"953f161d809fc1c6214315e01ab9aa92cbfeda61118131356955614845d2c802","cross_cats_sorted":["physics.bio-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2016-09-06T10:56:13Z","title_canon_sha256":"ed40c49be772be5c875e7a61c77d1f0f843ae562cb93efffa34b067fd1541408"},"schema_version":"1.0","source":{"id":"1609.01483","kind":"arxiv","version":1}},"canonical_sha256":"4d04c180f29a1732a9c3c5cbba74f10d0beae36caedd60a6f63ed13ceda7ae0c","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"4d04c180f29a1732a9c3c5cbba74f10d0beae36caedd60a6f63ed13ceda7ae0c","first_computed_at":"2026-05-18T01:05:39.424639Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:05:39.424639Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"UGctwdajowvUeIVxiCwaOM6k8OO8/4p/tG8Woj+GqOT3OwmRXjpNF5LVnO41rhgXBMWu/a6d2Xu3z8GiAe2nAw==","signature_status":"signed_v1","signed_at":"2026-05-18T01:05:39.425212Z","signed_message":"canonical_sha256_bytes"},"source_id":"1609.01483","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:5d2104b9705e2f797b4e80105142575d2cf5c593581bbafd1e3a46fe223541d5","sha256:c2c873d52a004282ab177b35ad5dcd40d713d0f1bcf794b06430be01db313aea"],"state_sha256":"d1799b4232140500ee3db9e563c0ad4494075e10809c21c37decafd25ba0adcb"}