Renogram - Nephron

  • Preparation for the scan is required. Please contact our practice.

This is a dynamic study for the assessment of individual renal function. Useful for evaluating renovascular hypertension, PUJ obstruction (a blockage of the flow of urine from the renal pelvis to the ureter), hydronephrosis, renal failure and renal transplants. The basic renogram can also be performed with diuresis and a reflux study can be done at the end of the study. An estimate of GFR (a test used to check how well the kidneys are working) can also be obtained. Patients must normally be well hydrated and in children special arrangements may be necessary. A straightforward study takes about 45 minutes. This scan produces better anatomical representation is effected than for DTPA (other Renogram study) but as the agent is excreted by both the glomerulus and tubular cells it cannot provide a true GFR. It is the agent of choice for indirect micturating cysto-ureterography. An estimate of ERPF (effective renal plasma flow) can also be obtained.

Used to assess:

Anatomy of the kidneys Blood supply to kidney Function of kidneys


Injection time: 3 mins
Scan duration: 50 mins

Child (0 - 4 years old):

Injection time: 30 mins (Drip)
Waiting time before scan: Wait for sedation to take effect before injecting isotope
Scan duration: 45 min

How to book

Patients will need to be referred to Nuclear Med by a referring doctor. Patients must select the specific scan/study required by their referring doctor and book an appointment at the most convenient location.


  • Medical aid authorisation (referring doctor to provide patient with specific ICD 10 code for medical aid authorisation)
  • Referring doctor’s name and practice number
  • Newly diagnosed oncology patients may need to register for oncology (referring doctor to facilitate registration)