Duplex ultrasound scanners.
D000068:Accreditation; D016477:Artifacts; D003365:Costs and Cost Analysis; D004868:Equipment Failure; D006804:Ergonomics; D005069:Evaluation Studies as Topic; D006801:Humans; D008283:Maintenance; D012449:Safety; D013673:Technology Assessment, Biomedical; D014159:Transducers; D018616:Ultrasonography, Doppler, Duplex / Q000009:adverse effects / Q000191:economics / Q000295:instrumentation* / Q000379:methods