The conventional radionuclide renal examination using a 1020-mCi dose of technetium-99m t mTc) DTPA (Pentetate), conducted over a 30-60-min duration, does not accommodate the Gates method for GFR determination. Simple modifications to the Gates technique will, however, permit a GFR determination to be made without sacrificing the components of a complete conventional renal examination, and will...