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Healthy heart and blood vessels, MRI angiogram
Coloured frontal magnetic resonance angiogram (MRA) scan of a healthy heart and blood vessels. The heart is at centre, with its major blood vessels. The kidneys are at bottom centre. The blood vessels of the neck and arms are at top centre and upper left and upper right. MRA is a type of magnetic resonance imaging (MRI) technique that highlights blood vessels without the need for X-rays or the injection of a radio-opaque dye.
, by ZEPHYR/SCIENCE PHOTO LIBRARY
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