{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2021:MZRFC7LEUMIDO6EP6SXVQPQ5CD","short_pith_number":"pith:MZRFC7LE","canonical_record":{"source":{"id":"2101.12265","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2021-01-28T20:31:04Z","cross_cats_sorted":["physics.optics","q-bio.QM"],"title_canon_sha256":"78a146cd10c8f8fa75498218654ef5dd20513d7d37563b61c15be281c6215361","abstract_canon_sha256":"2c81ca7acfe5ac7517aa81704557ed98432241fb59b0377af2787388ca6fe1b5"},"schema_version":"1.0"},"canonical_sha256":"6662517d64a31037788ff4af583e1d10e7acf6bc69c322f57ec3d84e886602b0","source":{"kind":"arxiv","id":"2101.12265","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.12265","created_at":"2026-07-05T02:10:42Z"},{"alias_kind":"arxiv_version","alias_value":"2101.12265v1","created_at":"2026-07-05T02:10:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.12265","created_at":"2026-07-05T02:10:42Z"},{"alias_kind":"pith_short_12","alias_value":"MZRFC7LEUMID","created_at":"2026-07-05T02:10:42Z"},{"alias_kind":"pith_short_16","alias_value":"MZRFC7LEUMIDO6EP","created_at":"2026-07-05T02:10:42Z"},{"alias_kind":"pith_short_8","alias_value":"MZRFC7LE","created_at":"2026-07-05T02:10:42Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2021:MZRFC7LEUMIDO6EP6SXVQPQ5CD","target":"record","payload":{"canonical_record":{"source":{"id":"2101.12265","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2021-01-28T20:31:04Z","cross_cats_sorted":["physics.optics","q-bio.QM"],"title_canon_sha256":"78a146cd10c8f8fa75498218654ef5dd20513d7d37563b61c15be281c6215361","abstract_canon_sha256":"2c81ca7acfe5ac7517aa81704557ed98432241fb59b0377af2787388ca6fe1b5"},"schema_version":"1.0"},"canonical_sha256":"6662517d64a31037788ff4af583e1d10e7acf6bc69c322f57ec3d84e886602b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T02:10:42.329193Z","signature_b64":"88x64TM8pA4YYmtKoGKxE/3uSz26XBzZ7egl8MyFlyRHzN6aAleq/hPy9AZbv20N7ah/W4GDYNUUbMuxQEwtDQ==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"6662517d64a31037788ff4af583e1d10e7acf6bc69c322f57ec3d84e886602b0","last_reissued_at":"2026-07-05T02:10:42.328843Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T02:10:42.328843Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2101.12265","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":"2026-07-05T02:10:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"AyrhDve6IKKGkwH+gM7e3t8Rh4Xk4S5T8OzWBzUabs3jGHMQKlWEpdveGimerC/ZKafIpahN1zGfSN8kJE3tDQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T11:53:08.712322Z"},"content_sha256":"3aa86ad84b9d1c85312d2fcdb803cfbef1d433f6b6c9493669164e40a24359eb","schema_version":"1.0","event_id":"sha256:3aa86ad84b9d1c85312d2fcdb803cfbef1d433f6b6c9493669164e40a24359eb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2021:MZRFC7LEUMIDO6EP6SXVQPQ5CD","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Speckle Statistics of Biological Tissues in Optical Coherence Tomography","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.optics","q-bio.QM"],"primary_cat":"physics.med-ph","authors_text":"Gary R. Ge, Jannick P. Rolland, Kevin J. Parker","submitted_at":"2021-01-28T20:31:04Z","abstract_excerpt":"The speckle statistics of optical coherence tomography images of biological tissue have been studied using several historical probability density functions. A recent hypothesis implies that underlying power-law distributions in the medium structure, such as the fractal branching vasculature, will contribute to power-law probability distributions of speckle statistics. Specifically, these are the Burr type XII distribution for speckle amplitude, the Lomax distribution for intensity, and the generalized logistic distribution for log amplitude. In this study, these three distributions are fitted "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.12265","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/2101.12265/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":"2026-07-05T02:10:42Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"YhN3AKA8PECnkTm2UbvQkbvVSAWXcPPq8L34oNuSfANWfsUAAYMbDHM3WHOx/l2vu597KjIfZBzDhqigRdMfCA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-21T11:53:08.713085Z"},"content_sha256":"d7cecb3f405da6400b28949fbfa71263c6852d0cba3623fff70fe9a28c35331f","schema_version":"1.0","event_id":"sha256:d7cecb3f405da6400b28949fbfa71263c6852d0cba3623fff70fe9a28c35331f"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MZRFC7LEUMIDO6EP6SXVQPQ5CD/bundle.json","state_url":"https://pith.science/pith/MZRFC7LEUMIDO6EP6SXVQPQ5CD/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MZRFC7LEUMIDO6EP6SXVQPQ5CD/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":"2026-08-21T11:53:08Z","links":{"resolver":"https://pith.science/pith/MZRFC7LEUMIDO6EP6SXVQPQ5CD","bundle":"https://pith.science/pith/MZRFC7LEUMIDO6EP6SXVQPQ5CD/bundle.json","state":"https://pith.science/pith/MZRFC7LEUMIDO6EP6SXVQPQ5CD/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MZRFC7LEUMIDO6EP6SXVQPQ5CD/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2021:MZRFC7LEUMIDO6EP6SXVQPQ5CD","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":"2c81ca7acfe5ac7517aa81704557ed98432241fb59b0377af2787388ca6fe1b5","cross_cats_sorted":["physics.optics","q-bio.QM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2021-01-28T20:31:04Z","title_canon_sha256":"78a146cd10c8f8fa75498218654ef5dd20513d7d37563b61c15be281c6215361"},"schema_version":"1.0","source":{"id":"2101.12265","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2101.12265","created_at":"2026-07-05T02:10:42Z"},{"alias_kind":"arxiv_version","alias_value":"2101.12265v1","created_at":"2026-07-05T02:10:42Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2101.12265","created_at":"2026-07-05T02:10:42Z"},{"alias_kind":"pith_short_12","alias_value":"MZRFC7LEUMID","created_at":"2026-07-05T02:10:42Z"},{"alias_kind":"pith_short_16","alias_value":"MZRFC7LEUMIDO6EP","created_at":"2026-07-05T02:10:42Z"},{"alias_kind":"pith_short_8","alias_value":"MZRFC7LE","created_at":"2026-07-05T02:10:42Z"}],"graph_snapshots":[{"event_id":"sha256:d7cecb3f405da6400b28949fbfa71263c6852d0cba3623fff70fe9a28c35331f","target":"graph","created_at":"2026-07-05T02:10:42Z","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/2101.12265/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"The speckle statistics of optical coherence tomography images of biological tissue have been studied using several historical probability density functions. A recent hypothesis implies that underlying power-law distributions in the medium structure, such as the fractal branching vasculature, will contribute to power-law probability distributions of speckle statistics. Specifically, these are the Burr type XII distribution for speckle amplitude, the Lomax distribution for intensity, and the generalized logistic distribution for log amplitude. In this study, these three distributions are fitted ","authors_text":"Gary R. Ge, Jannick P. Rolland, Kevin J. Parker","cross_cats":["physics.optics","q-bio.QM"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2021-01-28T20:31:04Z","title":"Speckle Statistics of Biological Tissues in Optical Coherence Tomography"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2101.12265","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":"sha256:3aa86ad84b9d1c85312d2fcdb803cfbef1d433f6b6c9493669164e40a24359eb","target":"record","created_at":"2026-07-05T02:10:42Z","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":"2c81ca7acfe5ac7517aa81704557ed98432241fb59b0377af2787388ca6fe1b5","cross_cats_sorted":["physics.optics","q-bio.QM"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2021-01-28T20:31:04Z","title_canon_sha256":"78a146cd10c8f8fa75498218654ef5dd20513d7d37563b61c15be281c6215361"},"schema_version":"1.0","source":{"id":"2101.12265","kind":"arxiv","version":1}},"canonical_sha256":"6662517d64a31037788ff4af583e1d10e7acf6bc69c322f57ec3d84e886602b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"6662517d64a31037788ff4af583e1d10e7acf6bc69c322f57ec3d84e886602b0","first_computed_at":"2026-07-05T02:10:42.328843Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T02:10:42.328843Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"88x64TM8pA4YYmtKoGKxE/3uSz26XBzZ7egl8MyFlyRHzN6aAleq/hPy9AZbv20N7ah/W4GDYNUUbMuxQEwtDQ==","signature_status":"signed_v1","signed_at":"2026-07-05T02:10:42.329193Z","signed_message":"canonical_sha256_bytes"},"source_id":"2101.12265","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:3aa86ad84b9d1c85312d2fcdb803cfbef1d433f6b6c9493669164e40a24359eb","sha256:d7cecb3f405da6400b28949fbfa71263c6852d0cba3623fff70fe9a28c35331f"],"state_sha256":"29965faeae860645d904826cc0ab4a6e0a9403e01dec17073812cf370ab7d7f6"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0hTZfddUEQwBR0zqIHVAk/Z/TfNMsGnXvPr1YglUT2t9hs26lAYxPhqTGia9i7E7zgKYNYi43aZOocvHUyxLAQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-21T11:53:08.720297Z","bundle_sha256":"899fdb67593737a32bfe8e6f761e9323e4d9b40945a6dd2549a96eda01152e7e"}}