A renal (kidney) scan is a test to evaluate the anatomy and function of the kidney. A renal scan is also known as renal imaging or renal scintigraphy. A renal scan is used for diagnosis of renal cortical lesions by using radioisotopes. It is also done to detect the location and degree of renal scars and renal parenchymal changes._x000D_ EC renal scan is a type of nuclear medicine procedure that uses a radioactive material called a radiotracer. Doctor would use Technetium-99m Ethylene Dicysteine (EC or TC99m EC) which is a metabolite of ethylene cysteine dimer while performing EC renal scan. EC or TC99M EC is a new technetium-labelled renal radiotracer. It has faster clearance (higher leakage) rate and thus absorbed radiation dose in patients is less. Additionally, an EC renal scan creates better quality cortical images.