Inflamed lymph node, Doppler ultrasound

Inflamed lymph node, Doppler ultrasound

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Credit: SIMON FRASER/SCIENCE PHOTO LIBRARY

Caption: Inflamed lymph node. Colour Doppler ultrasound scan of increased blood flow (red and blue) in an inflamed lymph node in the neck of a 40-year-old woman. The colour-coding shows the direction of the blood flow, away (blue) or towards (red) the detector. It can also distinguish between fast (bright) and slow (dark) flow. Inflammation of a lymph node (lymphadenitis) is usually a response to an infection. The increased lymph node activity produces more of the immune system's lymphocyte cells that fight infection. Colour Doppler ultrasound scanning colour-codes moving fluids, like blood, by detecting the frequency change they cause when reflecting high-frequency sound waves.

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Keywords: 40, 40-year-old, blood flow, circulation, circulatory, colour, condition, diagnosis, diagnostic, disease, disorder, doppler, female, forty years, forty-year-old, gland, healthcare, immune, infected, infection, inflamed, inflammation, lymph node, lymphadenitis, lymphatic system, medical, medicine, neck, patient, scan, scanning, sonograph, sonography, swelling, swollen, ultrasound, vascular system, vessel, vessels, woman

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