abdominal X-rays intravenous pyelogram (IVP) retrograde pyelogram ultrasound of the kidney (this is the preferred study) MRI of the abdomen and kidneys abdominal CT scan
The following tests can rule out obstruction:abdominal X-raysintravenous pyelogram (IVP)retrograde pyelogramultrasound of the kidney (this is the preferred study)MRI of the abdomen and kidneysabdominal CT scan