{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2019:D5PDM4XUGJXHWREBMCTLYH373A","short_pith_number":"pith:D5PDM4XU","canonical_record":{"source":{"id":"1902.00469","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-02-01T17:38:17Z","cross_cats_sorted":["cs.CV","cs.LG"],"title_canon_sha256":"9a3eb713c80fa56d6a0aa4d25e0d0fe0d5b0fb2086b97bd31eb33559ad33642f","abstract_canon_sha256":"1557d1fd54ea5f1fa3d5c1d3e07298e96c546d11d6fbc56ae52cc3c471595d8d"},"schema_version":"1.0"},"canonical_sha256":"1f5e3672f4326e7b448160a6bc1f7fd82841dacf822ead44bddd1eae39ba2546","source":{"kind":"arxiv","id":"1902.00469","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.00469","created_at":"2026-05-17T23:54:57Z"},{"alias_kind":"arxiv_version","alias_value":"1902.00469v1","created_at":"2026-05-17T23:54:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.00469","created_at":"2026-05-17T23:54:57Z"},{"alias_kind":"pith_short_12","alias_value":"D5PDM4XUGJXH","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"D5PDM4XUGJXHWREB","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"D5PDM4XU","created_at":"2026-05-18T12:33:15Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2019:D5PDM4XUGJXHWREBMCTLYH373A","target":"record","payload":{"canonical_record":{"source":{"id":"1902.00469","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-02-01T17:38:17Z","cross_cats_sorted":["cs.CV","cs.LG"],"title_canon_sha256":"9a3eb713c80fa56d6a0aa4d25e0d0fe0d5b0fb2086b97bd31eb33559ad33642f","abstract_canon_sha256":"1557d1fd54ea5f1fa3d5c1d3e07298e96c546d11d6fbc56ae52cc3c471595d8d"},"schema_version":"1.0"},"canonical_sha256":"1f5e3672f4326e7b448160a6bc1f7fd82841dacf822ead44bddd1eae39ba2546","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-17T23:54:57.407594Z","signature_b64":"egPH4iBIkqTZYnqUaUE3i4r2E3MM3vmGkIBNki7cGLasdiyRyW2L07JIh0b3UT72HvpMAgpC/Q99bh994N9TBQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"1f5e3672f4326e7b448160a6bc1f7fd82841dacf822ead44bddd1eae39ba2546","last_reissued_at":"2026-05-17T23:54:57.407002Z","signature_status":"signed_v1","first_computed_at":"2026-05-17T23:54:57.407002Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1902.00469","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":"2026-05-17T23:54:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"azCiXnPPNaE9G8se/QgMn2wVUYHAFZpjRDrmnR1b2SMg0rxs8BgEIugtP/VMD53Ov4kIYBeFSuNsGDLEcoMnDg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T01:22:26.181729Z"},"content_sha256":"9d50f1a29613d96e2acb269cceb7c8a501b3ed379c7975360eff6ecac624212a","schema_version":"1.0","event_id":"sha256:9d50f1a29613d96e2acb269cceb7c8a501b3ed379c7975360eff6ecac624212a"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2019:D5PDM4XUGJXHWREBMCTLYH373A","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"SCATGAN for Reconstruction of Ultrasound Scatterers Using Generative Adversarial Networks","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["cs.CV","cs.LG"],"primary_cat":"eess.IV","authors_text":"Andrawes Al Bahou, Christine Tanner, Orcun Goksel","submitted_at":"2019-02-01T17:38:17Z","abstract_excerpt":"Computational simulation of ultrasound (US) echography is essential for training sonographers. Realistic simulation of US interaction with microscopic tissue structures is often modeled by a tissue representation in the form of point scatterers, convolved with a spatially varying point spread function. This yields a realistic US B-mode speckle texture, given that a scatterer representation for a particular tissue type is readily available. This is often not the case and scatterers are nontrivial to determine. In this work we propose to estimate scatterer maps from sample US B-mode images of a "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.00469","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":"2026-05-17T23:54:57Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"OnUpw2f7vvP+dph5HgqxZdMU4xVAVOK7W2QAzJE9Gv9UA4P3NLlpNuK5rWqR5aT9FhGcWaPwU8WaocnekQVXAw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T01:22:26.182390Z"},"content_sha256":"bcf447cf620e25082d35fc4f605ae5244d963acbc805bdf47972e85a88ee1355","schema_version":"1.0","event_id":"sha256:bcf447cf620e25082d35fc4f605ae5244d963acbc805bdf47972e85a88ee1355"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/D5PDM4XUGJXHWREBMCTLYH373A/bundle.json","state_url":"https://pith.science/pith/D5PDM4XUGJXHWREBMCTLYH373A/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/D5PDM4XUGJXHWREBMCTLYH373A/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":"2026-05-27T01:22:26Z","links":{"resolver":"https://pith.science/pith/D5PDM4XUGJXHWREBMCTLYH373A","bundle":"https://pith.science/pith/D5PDM4XUGJXHWREBMCTLYH373A/bundle.json","state":"https://pith.science/pith/D5PDM4XUGJXHWREBMCTLYH373A/state.json","well_known_bundle":"https://pith.science/.well-known/pith/D5PDM4XUGJXHWREBMCTLYH373A/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2019:D5PDM4XUGJXHWREBMCTLYH373A","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":"1557d1fd54ea5f1fa3d5c1d3e07298e96c546d11d6fbc56ae52cc3c471595d8d","cross_cats_sorted":["cs.CV","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-02-01T17:38:17Z","title_canon_sha256":"9a3eb713c80fa56d6a0aa4d25e0d0fe0d5b0fb2086b97bd31eb33559ad33642f"},"schema_version":"1.0","source":{"id":"1902.00469","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1902.00469","created_at":"2026-05-17T23:54:57Z"},{"alias_kind":"arxiv_version","alias_value":"1902.00469v1","created_at":"2026-05-17T23:54:57Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1902.00469","created_at":"2026-05-17T23:54:57Z"},{"alias_kind":"pith_short_12","alias_value":"D5PDM4XUGJXH","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_16","alias_value":"D5PDM4XUGJXHWREB","created_at":"2026-05-18T12:33:15Z"},{"alias_kind":"pith_short_8","alias_value":"D5PDM4XU","created_at":"2026-05-18T12:33:15Z"}],"graph_snapshots":[{"event_id":"sha256:bcf447cf620e25082d35fc4f605ae5244d963acbc805bdf47972e85a88ee1355","target":"graph","created_at":"2026-05-17T23:54:57Z","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":"Computational simulation of ultrasound (US) echography is essential for training sonographers. Realistic simulation of US interaction with microscopic tissue structures is often modeled by a tissue representation in the form of point scatterers, convolved with a spatially varying point spread function. This yields a realistic US B-mode speckle texture, given that a scatterer representation for a particular tissue type is readily available. This is often not the case and scatterers are nontrivial to determine. In this work we propose to estimate scatterer maps from sample US B-mode images of a ","authors_text":"Andrawes Al Bahou, Christine Tanner, Orcun Goksel","cross_cats":["cs.CV","cs.LG"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-02-01T17:38:17Z","title":"SCATGAN for Reconstruction of Ultrasound Scatterers Using Generative Adversarial Networks"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1902.00469","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":"sha256:9d50f1a29613d96e2acb269cceb7c8a501b3ed379c7975360eff6ecac624212a","target":"record","created_at":"2026-05-17T23:54:57Z","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":"1557d1fd54ea5f1fa3d5c1d3e07298e96c546d11d6fbc56ae52cc3c471595d8d","cross_cats_sorted":["cs.CV","cs.LG"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"eess.IV","submitted_at":"2019-02-01T17:38:17Z","title_canon_sha256":"9a3eb713c80fa56d6a0aa4d25e0d0fe0d5b0fb2086b97bd31eb33559ad33642f"},"schema_version":"1.0","source":{"id":"1902.00469","kind":"arxiv","version":1}},"canonical_sha256":"1f5e3672f4326e7b448160a6bc1f7fd82841dacf822ead44bddd1eae39ba2546","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"1f5e3672f4326e7b448160a6bc1f7fd82841dacf822ead44bddd1eae39ba2546","first_computed_at":"2026-05-17T23:54:57.407002Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-17T23:54:57.407002Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"egPH4iBIkqTZYnqUaUE3i4r2E3MM3vmGkIBNki7cGLasdiyRyW2L07JIh0b3UT72HvpMAgpC/Q99bh994N9TBQ==","signature_status":"signed_v1","signed_at":"2026-05-17T23:54:57.407594Z","signed_message":"canonical_sha256_bytes"},"source_id":"1902.00469","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:9d50f1a29613d96e2acb269cceb7c8a501b3ed379c7975360eff6ecac624212a","sha256:bcf447cf620e25082d35fc4f605ae5244d963acbc805bdf47972e85a88ee1355"],"state_sha256":"62bd76ecf82ea0ddae621ca6cb90afbd75ac0c2686eac3edd497b394381b0383"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"1r9Ua3wB7UlsXamStH97zB/yKm62fmgFKRBta8NUKjoAVd1Xw9wfyE85N6b2A+SUy2KjeTOxjcx0uTTOvUdsBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T01:22:26.186169Z","bundle_sha256":"bd7b095d8240f450cd9f4556de756aa28ce74ed4d702f07dca39b344227725c2"}}