Baseline (pre captopril) study
Normal bilateral renal perfusion and cortical uptake. Radiotracer appears in the calyx by 90 seconds bilaterally. Clearance of radiotracer from the upper urinary tract with persistent cortical retention at the end of 20 minutes study. Time to peak is approximate 5 minutes in both kidneys.
Post captopril study
Normal bilateral renal perfusion and cortical uptake. Radiotracer appears in the calyx by 90 seconds bilaterally. Clearance of radiotracer from the upper urinary tract with persistent cortical retention at the end of 45 minutes study. Time to peak is approximate 3 minutes on the left and 4 minutes on the right.
Both the baseline study and post captopril study demonstrate a normal Type 0 renogram with 20-minute/max ratio not significantly different between the two studies.
The differential renal function at 2-3 minutes is 49% on the left and 51% on the right and baseline and 50% bilaterally at the post captopril study.
Overall impression:
No scintigraphic evidence of renal artery stenosis.