Objective: Careful analysis of the nephrogram is an integral component of the evaluation of the kidneys during CT urography. This is a review of the anatomy and physiology required to produce a normal nephrogram, as well as the basic principles affecting the interpretation of the nephrogram.
Conclusion: The eight abnormal nephrographic patterns will be illustrated and discussed. This review will enable the reader to recognize and understand the abnormal nephrographic patterns encountered in practice.