{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"c6d65195310259b96d287c4cfe01c249935df856b0953243a4b03ed06c60ee6a","created":"2026-10-03T07:18:07Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"e746ea7e88aef2fa20151dc8fd4e2047a56a36a059dae1d11c99cff40f5f05e4","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"med.pcct.dose-limit","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"Counting photons individually should allow the same image quality at a lower dose, but how much lower is debated.","posed_since":"2015","precise":"Quantify the dose reduction factor achievable with photon-counting relative to energy-integrating detection at matched task-based detectability, separately for high-contrast spatial resolution tasks, low-contrast detection tasks and material quantification tasks, for patient thicknesses of 20 to 45 cm. An answer is a factor with uncertainty per task class.","problem_ref":null,"references":"","settled_by":"Matched-phantom and reader studies on paired systems with observer-model detectability analysis.","status_note":"Reported reductions of roughly 20 to 45 percent are task and system specific.","title":"Achievable dose reduction at fixed diagnostic performance","topic_ref":"26d23f25e437e5a24b43745dd4da6507964829094aa1ed73aeaafb9ea3f82278"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"dffbe4f996a2ad0056235e694b844537276e49f02915b22a74e7d00369350063","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"a1b33415294aceffff4669b27315e18764b819ea71550a4f03ad5c2d0cc06717","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"qsgY0P3fvA5vzzltOEogx7KsApW6g57wiHsCthOU-P0PbAKX0ZUqiKq5F-nHoFMGJ4yltDBo0kJNwMw1V5dBCw"},"schema":"pubphys.envelope/1"},"record_hash":"dffbe4f996a2ad0056235e694b844537276e49f02915b22a74e7d00369350063","leaf_index":1710}