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KUB is typically used to investigate gastrointestinal conditions such as a bowel obstruction and gallstones, and can detect the presence of kidney stones. The KUB is often used to diagnose constipation as stool can be seen readily.
Kidneys, ureters, and bladder x-ray. In medicine, KUB refers to a diagnostic medical imaging technique of the abdomen and stands for Kidneys, Ureters, and Bladder. A KUB is a plain frontal supine radiograph of the abdomen.