LEA PATERSON / SCIENCE PHOTO LIBRARY LEA PATERSON / SCIENCE PHOTO LIBRARY
X-ray diagnosis. Doctor pointing to an X-ray of a patient's abdomen. On the X-ray film, the ribs are at top, the spine is at centre and the pelvis is at bottom. The bright specks seen throughout the abdominal region are radioopaque markers used to measure the patient's digestive transit (the time taken for food to pass through the digestive system).
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