{"record_type":"pith_number_record","schema_url":"https://pith.science/schemas/pith-number/v1.json","pith_number":"pith:2017:MTXOFGONBOWN3PIPMD2WJE3YDF","short_pith_number":"pith:MTXOFGON","schema_version":"1.0","canonical_sha256":"64eee299cd0bacddbd0f60f564937819790aabc12101ce49c9521c31ecc2d650","source":{"kind":"arxiv","id":"1705.08273","version":1},"attestation_state":"computed","paper":{"title":"A New 3D Segmentation Technique for QCT Scans of the Lumbar Spine to Determine BMD and Vertebral Geometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Andre Mastmeyer, Christina Fuchs, Klaus Engelke, Willi Kalender","submitted_at":"2017-05-19T19:13:38Z","abstract_excerpt":"Quantitative computed tomography (QCT) is a standard method to determine bone mineral density (BMD) in the spine. Traditionally single 8 - 10 mm thick slices have been analyzed only. Current spiral CT scanners provide true 3D acquisition schemes allowing for a more differential BMD analysis and an assessment of geometric parameters, which may improve fracture prediction. We developed a novel 3D segmentation approach that combines deformable balloons, multi seeded volume growing, and dedicated morphological operations to extract the vertebral bodies. An anatomy-oriented coordinate system attach"},"verification_status":{"content_addressed":true,"pith_receipt":true,"author_attested":false,"weak_author_claims":0,"strong_author_claims":0,"externally_anchored":false,"storage_verified":false,"citation_signatures":0,"replication_records":0,"graph_snapshot":true,"references_resolved":false,"formal_links_present":false},"canonical_record":{"source":{"id":"1705.08273","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"cs.CV","submitted_at":"2017-05-19T19:13:38Z","cross_cats_sorted":[],"title_canon_sha256":"8d4cbb5e167d191e0d8fb187adf28ed888981f4dd682cdedfc4e7b5e791845fa","abstract_canon_sha256":"80c0d4c1079ac56efe27bb337fb858b6994f7533124b7029bc35befb6a385d7e"},"schema_version":"1.0"},"receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T00:43:48.817434Z","signature_b64":"tOzzYwstif3guz0rwMhljLmUTDTztRIPzRrreTZap6xVH+4/A0N1E0MDnZdE+MRe/chgksgGrr/gwVP88mYMBg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"64eee299cd0bacddbd0f60f564937819790aabc12101ce49c9521c31ecc2d650","last_reissued_at":"2026-05-18T00:43:48.816733Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T00:43:48.816733Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"graph_snapshot":{"paper":{"title":"A New 3D Segmentation Technique for QCT Scans of the Lumbar Spine to Determine BMD and Vertebral Geometry","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"cs.CV","authors_text":"Andre Mastmeyer, Christina Fuchs, Klaus Engelke, Willi Kalender","submitted_at":"2017-05-19T19:13:38Z","abstract_excerpt":"Quantitative computed tomography (QCT) is a standard method to determine bone mineral density (BMD) in the spine. Traditionally single 8 - 10 mm thick slices have been analyzed only. Current spiral CT scanners provide true 3D acquisition schemes allowing for a more differential BMD analysis and an assessment of geometric parameters, which may improve fracture prediction. We developed a novel 3D segmentation approach that combines deformable balloons, multi seeded volume growing, and dedicated morphological operations to extract the vertebral bodies. An anatomy-oriented coordinate system attach"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1705.08273","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"},"aliases":[{"alias_kind":"arxiv","alias_value":"1705.08273","created_at":"2026-05-18T00:43:48.816854+00:00"},{"alias_kind":"arxiv_version","alias_value":"1705.08273v1","created_at":"2026-05-18T00:43:48.816854+00:00"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1705.08273","created_at":"2026-05-18T00:43:48.816854+00:00"},{"alias_kind":"pith_short_12","alias_value":"MTXOFGONBOWN","created_at":"2026-05-18T12:31:31.346846+00:00"},{"alias_kind":"pith_short_16","alias_value":"MTXOFGONBOWN3PIP","created_at":"2026-05-18T12:31:31.346846+00:00"},{"alias_kind":"pith_short_8","alias_value":"MTXOFGON","created_at":"2026-05-18T12:31:31.346846+00:00"}],"events":[],"event_summary":{},"paper_claims":[],"inbound_citations":{"count":0,"internal_anchor_count":0,"sample":[]},"formal_canon":{"evidence_count":0,"sample":[],"anchors":[]},"links":{"html":"https://pith.science/pith/MTXOFGONBOWN3PIPMD2WJE3YDF","json":"https://pith.science/pith/MTXOFGONBOWN3PIPMD2WJE3YDF.json","graph_json":"https://pith.science/api/pith-number/MTXOFGONBOWN3PIPMD2WJE3YDF/graph.json","events_json":"https://pith.science/api/pith-number/MTXOFGONBOWN3PIPMD2WJE3YDF/events.json","paper":"https://pith.science/paper/MTXOFGON"},"agent_actions":{"view_html":"https://pith.science/pith/MTXOFGONBOWN3PIPMD2WJE3YDF","download_json":"https://pith.science/pith/MTXOFGONBOWN3PIPMD2WJE3YDF.json","view_paper":"https://pith.science/paper/MTXOFGON","resolve_alias":"https://pith.science/api/pith-number/resolve?arxiv=1705.08273&json=true","fetch_graph":"https://pith.science/api/pith-number/MTXOFGONBOWN3PIPMD2WJE3YDF/graph.json","fetch_events":"https://pith.science/api/pith-number/MTXOFGONBOWN3PIPMD2WJE3YDF/events.json","actions":{"anchor_timestamp":"https://pith.science/pith/MTXOFGONBOWN3PIPMD2WJE3YDF/action/timestamp_anchor","attest_storage":"https://pith.science/pith/MTXOFGONBOWN3PIPMD2WJE3YDF/action/storage_attestation","attest_author":"https://pith.science/pith/MTXOFGONBOWN3PIPMD2WJE3YDF/action/author_attestation","sign_citation":"https://pith.science/pith/MTXOFGONBOWN3PIPMD2WJE3YDF/action/citation_signature","submit_replication":"https://pith.science/pith/MTXOFGONBOWN3PIPMD2WJE3YDF/action/replication_record"}},"created_at":"2026-05-18T00:43:48.816854+00:00","updated_at":"2026-05-18T00:43:48.816854+00:00"}