Fluoroscopy allows doctors to see movement inside the body and is commonly used to examine the gastrointestinal and genitourinary areas. Different examinations can be performed to allow the radiologists to visualize the esophagus, stomach, small bowel, large bowel or the bladder and kidneys with the use of contrast. Depending on the exam being performed, your child will be asked to drink a barium sulfate drink that tastes like a strawberry shake. The radiologist captures x-ray images as the exam is being performed.