what tests are taken to determine kidney function?
1 Tests of your blood and your urine may give your doctor clues about what's causing your signs and symptoms.  Imaging tests. Imaging tests allow your doctor to visualize a kidney tumor or abnormality. Imaging tests might include ultrasound, computerized tomography (CT) scan or magnetic resonance imaging (MRI).
Estimated Glomerular Filtration Rate (eGFR) The eGFR kidney test is a test that estimates the total blood filtered through the kidneys every minute. Healthy kidneys filter 90ml to 120ml every minute of every hour. This occurs through the glomerular capillaries of the kidneys, hence the name.