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dynamic renal scintigraphy
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Dynamic renal scintigraphy provides functional information about each renal tract. The isotopes most commonly used are:

  • diethylenetriamine penta-acetic acid - DTPA - labelled with 99m technetium
  • mercaptoacetylglycine - MAG3 - labelled with 99m technetium
  • hippuran labelled with iodine 131

Radionuclide cystography is a variation on this method that is used to study patients with suspected vesico-ureteric reflux. The degree of reflux is assessed by measuring activity in the upper tracts after voiding.