<s>[INST] First ultrasound it was dilated kidney (right), second ultra sound right enlarge, left a bit enlarge. I felt numbness n pain both legs n arms n lower right abdominal. Waiting for result blood test kidney before going CT Scan which I try to avoid due to high radiation. Do I need to go for CT Scan? [/INST] Hello and welcome to Chat Doctor. Your anxiety for CT-SCAN radiation harming you, is improper. It does not have the high radiation levels as in an X-RAY.Don't worry at all. Why a CT-SCAN.? Ultrasound scan is a basic screening test, which shows R.and L. enlarged kidneys, but no idea about the cause, or function of either kidneys. The CT-SCAN is accurate in that respect.It's an internal scan. It will give a very good idea about both kidneys function, and, give us valuable information, about cause of the enlargement. Further treatment will depend upon it. </s>