{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"f6b24906c2658d76934c3010601c8bbe877599fecd5a7ba1f440d31c9e4e32ce","created":"2026-10-03T07:18:06Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"6861dc8dc58024f606a7e5a7786af6c849b1b586e3f7ad7344be7f1b5f095bed","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"med.focused-ultrasound.thermometry","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"Heating treatments need to know the temperature at the focus as it rises, which today requires an expensive magnetic resonance scanner.","posed_since":"1995","precise":"Measure tissue temperature during focused ultrasound heating to an accuracy of 1 K with a spatial resolution of 2 mm and an update rate above 1 Hz, in fat-containing and moving tissue, using acoustic observables such as speed-of-sound shift, thermal strain, or backscatter change. An answer is a demonstrated technique meeting these figures against an independent temperature reference.","problem_ref":null,"references":"","settled_by":"Comparison with embedded thermometry or magnetic resonance thermometry in tissue phantoms and in vivo during heating.","status_note":"","title":"Real-time tissue thermometry without magnetic resonance","topic_ref":"8f240ebd4ecd5f8e303bb3f92d02a60c846c51e2ff4c97cf08dac7930e62b3b4"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"e5818c39a99c6cb94fe3bc6d402339db9cddef92859890c98a76060deb7d8f07","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"d0c9cef140800520de7a8eda5b5a4d0494953f103a8c89d561ae4f186f68cfd2","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"EGbaZ3u8bT-H8oUkruDKaF86TAoIAHsbPtcjbBGwfBjSywKowJvf5vwpiZwdD0kubCUWzSVNDjXZiSKNUtZeCw"},"schema":"pubphys.envelope/1"},"record_hash":"e5818c39a99c6cb94fe3bc6d402339db9cddef92859890c98a76060deb7d8f07","leaf_index":1688}