{"data":{"id":"us/21-cfr-882.1925","jurisdiction":"us","citation":"21 CFR 882.1925","heading":"Ultrasonic scanner calibration test block.","body":"(a) Identification. An ultrasonic scanner calibration test block is a block of material with known properties used to calibrate ultrasonic scanning devices (e.g., the echoencephalograph).\n(b) Classification. Class I (general controls). The device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 882.9.","path":["Title 21—Food and Drugs","CHAPTER I—FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES","SUBCHAPTER H—MEDICAL DEVICES","PART 882—NEUROLOGICAL DEVICES","Subpart B—Neurological Diagnostic Devices"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-21.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:24:47Z","sha256":"47f8ff9c7e3e4a7cd281a9dc130ea4e1cf3ba2c865e06438b9e40596c1581dcb","source_id":"us-cfr","stale":true,"prev":"us/21-cfr-882.1900","next":"us/21-cfr-882.1935"},"notice":"GroundRules: Original legal text. Not legal advice."}