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Gastrointestinal Fluoroscopy

Fluoroscopy is a type of imaging that allows our Radiologists to view continuous X-ray images while performing your procedure. At Kingston Imaging Services (KIS), fluoroscopy is used to examine the upper digestive tract.

Type of Upper GI Tests

Barium Swallow

This procedure is used to visualize the esophagus by swallowing liquid barium while X-ray images are obtained.

Upper Gastrointestinal (GI) Series

The esophagus, stomach and duodenum (first part of the small intestine) are imaged using liquid barium to reveal abnormalities.

Small Bowel Series

This procedure involves filling the small intestine with liquid barium.  X-ray images are taken every 20-30 minutes over the next hour or two until the entire small bowel is opacified.


  • Nothing to eat or drink after midnight.
  • Upper GI Series/Barium Swallow/ Small Bowel Follow-Through