{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2018:GVMWFST2E2NA6NYN356U2SQRBH","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":"a936678eef2e103d08e5505fc2b9aca265552dd7ebcf00e11f169f70670f006d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-02-06T17:42:07Z","title_canon_sha256":"66fdd40140cebae4ea1b837992d3a793c8c9bb1307da340fdf42bf3a215f7445"},"schema_version":"1.0","source":{"id":"1802.02088","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1802.02088","created_at":"2026-05-18T00:19:32Z"},{"alias_kind":"arxiv_version","alias_value":"1802.02088v1","created_at":"2026-05-18T00:19:32Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1802.02088","created_at":"2026-05-18T00:19:32Z"},{"alias_kind":"pith_short_12","alias_value":"GVMWFST2E2NA","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_16","alias_value":"GVMWFST2E2NA6NYN","created_at":"2026-05-18T12:32:25Z"},{"alias_kind":"pith_short_8","alias_value":"GVMWFST2","created_at":"2026-05-18T12:32:25Z"}],"graph_snapshots":[{"event_id":"sha256:1fe6bbc6ddd7201576a43ae5a1e8f918e6208ae9eb9f0d3f4683f43f8e45d7ba","target":"graph","created_at":"2026-05-18T00:19:32Z","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 spatial compounding technique and variational framework to improve 3D ultrasound image quality by compositing multiple ultrasound volumes acquired from different probe orientations. In the composite volume, instead of intensity values, we estimate a tensor at every voxel. The resultant tensor image encapsulates the directional information of the underlying imaging data and can be used to generate ultrasound volumes from arbitrary, potentially unseen, probe positions. Extending the work of Hennersperger et al., we introduce a log-Euclidean framework to ensure that the tensors are p","authors_text":"David Hawkes, Donald Peebles, Fred Ushakov, Jan Deprest, Jyotirmoy Banerjee, Premal A. Patel, Sebastien Ourselin, Tom Vercauteren","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-02-06T17:42:07Z","title":"A Log-Euclidean and Total Variation based Variational Framework for Computational Sonography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1802.02088","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":"sha256:15633773e79a08f3b1df36cb674acf4ad4fb0a7a02f3f789c9b94e3d4ee3fba9","target":"record","created_at":"2026-05-18T00:19:32Z","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":"a936678eef2e103d08e5505fc2b9aca265552dd7ebcf00e11f169f70670f006d","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2018-02-06T17:42:07Z","title_canon_sha256":"66fdd40140cebae4ea1b837992d3a793c8c9bb1307da340fdf42bf3a215f7445"},"schema_version":"1.0","source":{"id":"1802.02088","kind":"arxiv","version":1}},"canonical_sha256":"355962ca7a269a0f370ddf7d4d4a1109e58c5a5ee8cba99d7fdca7c5ec96ec6e","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"355962ca7a269a0f370ddf7d4d4a1109e58c5a5ee8cba99d7fdca7c5ec96ec6e","first_computed_at":"2026-05-18T00:19:32.903236Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T00:19:32.903236Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"LrnWEneMbkcKASXsEzE14Yw9QElq4AAMxvFS3pJCEwsjbaWhzk7qnGvdui8BlL0KkoFmNWF7/eVXRI8VRGt/BQ==","signature_status":"signed_v1","signed_at":"2026-05-18T00:19:32.904119Z","signed_message":"canonical_sha256_bytes"},"source_id":"1802.02088","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:15633773e79a08f3b1df36cb674acf4ad4fb0a7a02f3f789c9b94e3d4ee3fba9","sha256:1fe6bbc6ddd7201576a43ae5a1e8f918e6208ae9eb9f0d3f4683f43f8e45d7ba"],"state_sha256":"40c05361e72472045c8e7e02b6f06d9c9239ad5437c99f38aa18d5fa7a9cd63b"}