The corrector-medullary differentiation provides a wide pace in understanding the patho-physiology of renal diseases. It displayed specific findings and hence it could be implemented as an investigatory as well as follow up tool for patients with renal stones and who are on lithotripsy treatment. This study being the first of its type in Sudan, it was justified to be carried to provide preliminary normative data and hence to be used as a reference value for patients renal stones and who are on lithotripsy treatment. This book provides rich information about the effect of the ESWL on the Kidneys, where quantitative analysis are done and hence objective diagnosis is achieved.