The video given below provides great understanding of x-ray KUB. It helps to identify the various structures that are visible in an x-ray KUB. 00:00-01:21 Introduction 01:21-06:21 Bones of the Lumbar Region 06:21-07:30 Psoas Major Muscle 07:31-08:15 Kidneys 08:16-11:02 Ureters & Urinary Bladder