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3. The imaging services accreditation scheme standard: Statements, rationales and criteria;College of Radiographers, Royal College of Radiologists,2013
4. Guidance notes for the acquisition and testing of ultrasound scanners for use in the NHS Breast Screening Programme. NHS Breast Screening Programme Publication No. 70;Dall,2011
5. A multicentre survey of the condition of ultrasound probes;Dudley;Ultrasound,2016