Blood flow test. Nurse performing a doppler ultrasound of blood flow in the carotid arteries of a 93 year old male patient. She is using an ultrasound transducer (centre right) to image the flow of blood in the neck (seen on the monitor at upper left). The patient has previously suffered a transient ischaemic attack (TIA, or 'mini stroke'). Photographed at the Western General Hospital stroke unit, Edinburgh, UK.
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