{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2025:FLX2BBYQOJPF5M2EOVZZMNSYZQ","short_pith_number":"pith:FLX2BBYQ","canonical_record":{"source":{"id":"2502.01593","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-02-03T18:26:04Z","cross_cats_sorted":[],"title_canon_sha256":"e305cc8fb40e6e22f782db39f56080fd6c489ad1ae8d658724a4227aa5b6c7d2","abstract_canon_sha256":"21612582efe4d96cb106600e444db1cbb137639d76263f8399c99a87d5af54a1"},"schema_version":"1.0"},"canonical_sha256":"2aefa08710725e5eb3447573963658cc0384946d8e17b7fd977568b0dc63f1b0","source":{"kind":"arxiv","id":"2502.01593","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.01593","created_at":"2026-07-05T10:08:56Z"},{"alias_kind":"arxiv_version","alias_value":"2502.01593v1","created_at":"2026-07-05T10:08:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.01593","created_at":"2026-07-05T10:08:56Z"},{"alias_kind":"pith_short_12","alias_value":"FLX2BBYQOJPF","created_at":"2026-07-05T10:08:56Z"},{"alias_kind":"pith_short_16","alias_value":"FLX2BBYQOJPF5M2E","created_at":"2026-07-05T10:08:56Z"},{"alias_kind":"pith_short_8","alias_value":"FLX2BBYQ","created_at":"2026-07-05T10:08:56Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2025:FLX2BBYQOJPF5M2EOVZZMNSYZQ","target":"record","payload":{"canonical_record":{"source":{"id":"2502.01593","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-02-03T18:26:04Z","cross_cats_sorted":[],"title_canon_sha256":"e305cc8fb40e6e22f782db39f56080fd6c489ad1ae8d658724a4227aa5b6c7d2","abstract_canon_sha256":"21612582efe4d96cb106600e444db1cbb137639d76263f8399c99a87d5af54a1"},"schema_version":"1.0"},"canonical_sha256":"2aefa08710725e5eb3447573963658cc0384946d8e17b7fd977568b0dc63f1b0","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-07-05T10:08:56.877208Z","signature_b64":"h5NOdOyE6JgBNjSfEDlTZax3IZoZBql6+gUT6i51P+FHKMhFnk1tcm20M6QXz7lARlP0hMT0kBa7dHHVpWVBBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"2aefa08710725e5eb3447573963658cc0384946d8e17b7fd977568b0dc63f1b0","last_reissued_at":"2026-07-05T10:08:56.876751Z","signature_status":"signed_v1","first_computed_at":"2026-07-05T10:08:56.876751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"2502.01593","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":"2026-07-05T10:08:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"pypi7dczs1kaiOMh9V9g4zEYzKZH7juXJ/Pq5i4GJ12xxP9WNcdgpEXyE1RMP7kE9JFkIQyt14g9/fWXU4hqBg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T20:08:42.421079Z"},"content_sha256":"0c379bf384c214e7fd6de6d7aee1f9426128c4296a3a57b57e8322a2135c93eb","schema_version":"1.0","event_id":"sha256:0c379bf384c214e7fd6de6d7aee1f9426128c4296a3a57b57e8322a2135c93eb"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2025:FLX2BBYQOJPF5M2EOVZZMNSYZQ","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Ultrafast Proton Delivery with Pin Ridge Filters (pRFs): A Novel Approach for Motion Management in Proton Therapy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"physics.med-ph","authors_text":"Ahmal Jawad Zafar, Jun Zhou, Xiaofeng Yang, Yinan Wang, Zachary Diamond","submitted_at":"2025-02-03T18:26:04Z","abstract_excerpt":"Active breath-hold techniques effectively mitigate respiratory motion but pose challenges for patients who are ineligible for the procedure. Conventional treatment planning relies on multiple energy layers, extending delivery time due to slow layer switching. We propose to use pin ridge filters (pRFs), initially developed for FLASH radiotherapy, to construct a single energy beam plan and minimize dose delivery time. The conventional ITV--based free--breathing treatment plan served as the reference. A GTV--based IMPT--DS plan with a downstream energy modulation strategy was developed based on a"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.01593","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/2502.01593/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":"2026-07-05T10:08:56Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"6R9pAnlh0a9iqOzEtM6fALIs2ZHNCKSXAwJgB0vFI3zZ/FeSJgiI4o8eiTc4XOUyKrOquiMu3J/7FFiZdzsCCw==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-08-06T20:08:42.421449Z"},"content_sha256":"4776d49e601ab33104d5a8d01d1b79ce96911cfe58a7ef619a48f34da2c39422","schema_version":"1.0","event_id":"sha256:4776d49e601ab33104d5a8d01d1b79ce96911cfe58a7ef619a48f34da2c39422"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/FLX2BBYQOJPF5M2EOVZZMNSYZQ/bundle.json","state_url":"https://pith.science/pith/FLX2BBYQOJPF5M2EOVZZMNSYZQ/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/FLX2BBYQOJPF5M2EOVZZMNSYZQ/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":"2026-08-06T20:08:42Z","links":{"resolver":"https://pith.science/pith/FLX2BBYQOJPF5M2EOVZZMNSYZQ","bundle":"https://pith.science/pith/FLX2BBYQOJPF5M2EOVZZMNSYZQ/bundle.json","state":"https://pith.science/pith/FLX2BBYQOJPF5M2EOVZZMNSYZQ/state.json","well_known_bundle":"https://pith.science/.well-known/pith/FLX2BBYQOJPF5M2EOVZZMNSYZQ/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2025:FLX2BBYQOJPF5M2EOVZZMNSYZQ","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":"21612582efe4d96cb106600e444db1cbb137639d76263f8399c99a87d5af54a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-02-03T18:26:04Z","title_canon_sha256":"e305cc8fb40e6e22f782db39f56080fd6c489ad1ae8d658724a4227aa5b6c7d2"},"schema_version":"1.0","source":{"id":"2502.01593","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"2502.01593","created_at":"2026-07-05T10:08:56Z"},{"alias_kind":"arxiv_version","alias_value":"2502.01593v1","created_at":"2026-07-05T10:08:56Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.2502.01593","created_at":"2026-07-05T10:08:56Z"},{"alias_kind":"pith_short_12","alias_value":"FLX2BBYQOJPF","created_at":"2026-07-05T10:08:56Z"},{"alias_kind":"pith_short_16","alias_value":"FLX2BBYQOJPF5M2E","created_at":"2026-07-05T10:08:56Z"},{"alias_kind":"pith_short_8","alias_value":"FLX2BBYQ","created_at":"2026-07-05T10:08:56Z"}],"graph_snapshots":[{"event_id":"sha256:4776d49e601ab33104d5a8d01d1b79ce96911cfe58a7ef619a48f34da2c39422","target":"graph","created_at":"2026-07-05T10:08:56Z","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/2502.01593/integrity.json","findings":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938","summary":{"advisory":0,"by_detector":{},"critical":0,"informational":0}},"paper":{"abstract_excerpt":"Active breath-hold techniques effectively mitigate respiratory motion but pose challenges for patients who are ineligible for the procedure. Conventional treatment planning relies on multiple energy layers, extending delivery time due to slow layer switching. We propose to use pin ridge filters (pRFs), initially developed for FLASH radiotherapy, to construct a single energy beam plan and minimize dose delivery time. The conventional ITV--based free--breathing treatment plan served as the reference. A GTV--based IMPT--DS plan with a downstream energy modulation strategy was developed based on a","authors_text":"Ahmal Jawad Zafar, Jun Zhou, Xiaofeng Yang, Yinan Wang, Zachary Diamond","cross_cats":[],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-02-03T18:26:04Z","title":"Ultrafast Proton Delivery with Pin Ridge Filters (pRFs): A Novel Approach for Motion Management in Proton Therapy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2502.01593","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":"sha256:0c379bf384c214e7fd6de6d7aee1f9426128c4296a3a57b57e8322a2135c93eb","target":"record","created_at":"2026-07-05T10:08:56Z","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":"21612582efe4d96cb106600e444db1cbb137639d76263f8399c99a87d5af54a1","cross_cats_sorted":[],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"physics.med-ph","submitted_at":"2025-02-03T18:26:04Z","title_canon_sha256":"e305cc8fb40e6e22f782db39f56080fd6c489ad1ae8d658724a4227aa5b6c7d2"},"schema_version":"1.0","source":{"id":"2502.01593","kind":"arxiv","version":1}},"canonical_sha256":"2aefa08710725e5eb3447573963658cc0384946d8e17b7fd977568b0dc63f1b0","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"2aefa08710725e5eb3447573963658cc0384946d8e17b7fd977568b0dc63f1b0","first_computed_at":"2026-07-05T10:08:56.876751Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-07-05T10:08:56.876751Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"h5NOdOyE6JgBNjSfEDlTZax3IZoZBql6+gUT6i51P+FHKMhFnk1tcm20M6QXz7lARlP0hMT0kBa7dHHVpWVBBg==","signature_status":"signed_v1","signed_at":"2026-07-05T10:08:56.877208Z","signed_message":"canonical_sha256_bytes"},"source_id":"2502.01593","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:0c379bf384c214e7fd6de6d7aee1f9426128c4296a3a57b57e8322a2135c93eb","sha256:4776d49e601ab33104d5a8d01d1b79ce96911cfe58a7ef619a48f34da2c39422"],"state_sha256":"b61584b136e129ba20f5b00867f7ea352d0e6323673b50e30e6c85951d511599"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+6Eea9aUtURwIOPQr6VWgDGe9QcPjneNP208AodUGQ18Qd64WJpOn7Gb1zbgnDXHhZFqepXrguvb327MhVLRCQ==","signed_message":"bundle_sha256_bytes","signed_at":"2026-08-06T20:08:42.425205Z","bundle_sha256":"8aa69c9a909da91e577e0c3a0e8e0b3f4e76e95414d494feff5024303078c5cb"}}