text: Abdomen<unk>  may be helpful in the diagnosis of hydronephrosis. Findings on<unk>  suggestive of hydronephrosis include renal perfusion and renal diffusion during acute ureteral obstruction.
option_0: Hydronephrosis MRI
option_1: Hydronephrosis electrocardiogram
option_2: Pyonephrosis MRI
option_3: Pyonephrosis ultrasound
option_4: Pyonephrosis CT
option_5: Hydronephrosis echocardiography or ultrasound
option_6: Hydronephrosis CT
option_7: Hydronephrosis x ray