1. Medical x-ray imaging devices conformance: guidance for industry and Food and Drug Administration staff Publication: Silver Spring, MD : Center for Devices and Radiological Health, May 8, 2019 Subject(s): Device Approval -- standardsElectrical Equipment and Supplies -- classificationElectrical Equipment and Supplies -- standardsRadiography -- classificationRadiography -- instrumentationEquipment SafetyGuideline AdherenceTomography Scanners, X-Ray Computed -- standardsHumansUnited StatesUnited States. Department of Health and Human Services.United States. Food and Drug Administration.