Examination
The patient is asked to drink a suspension of barium sulfate. Fluoroscopy images are taken as the barium is swallowed. This is typically at a rate of 2 or 3 frames per second. The patient is asked to swallow the barium a number of times, whilst standing in different positions, i.e. AP, oblique and lateral, to assess the 3D structure as best as possible. This technique induces gas production in the esophagus, and can be uncomfortable to the subject.
Read more about this topic: Barium Swallow
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—Ishmael Reed (b. 1938)