hi i am Bhargav from mumbai, i had a kidney scan done for its function in June 2010, at that time the left kidney functioned around 23% and right funtioned 73%. i wanted to know how risky it is. i was diagnosed with scars on left kidney and the kidney is half in size as compared to the right one. Also lately i have been having troubles with back pain on the right side, and had urine test done and have passed pus in it. in two earlier urine tests there was also albumin present. There is also bacteria.