D.OUELLETTE,PUBLIPHOTO DIFFUSION / SCIENCE PHOTO LIBRARY D.OUELLETTE,PUBLIPHOTO DIFFUSION / SCIENCE PHOTO LIBRARY
Ultrasound scanning. Doctor using an ultrasound transducer to examine blood flow through the portal vein in a woman's abdomen. Ultrasound is a diagnostic technique using high- frequency sound waves to create an image of a patient's organs and tissues.
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