An<unk>  is an<unk> -ray of the abdomen. It is sometimes abbreviated to<unk> , or KUB (for kidneys, ureters, and urinary bladder).
Abdominal x-ray
Lower gastrointestinal series
Upper gastrointestinal series
Sigmoidoscopy
Dry enema
Double-contrast barium enema
Endoscopic ultrasound
Rectal thermometry