ANTONIA REEVE / SCIENCE PHOTO LIBRARY ANTONIA REEVE / SCIENCE PHOTO LIBRARY
Barium meal X-ray. Radiologist viewing an abdominal X-ray (centre left) of an elderly male patient. The patient has swallowed a barium meal, a suspension of barium sulphate which is opaque to the X-rays produced by the X-ray machine at upper right. This procedure enables the detection of diseases or abnormalities of the lower oesophagus, stomach and upper intestine.
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