The use of radioactive labels for tracers is an important part of the investigation of renal disease. These techniques seldom replace, but often complement radiographic techniques. Generally, the radionuclide methods provide functional and dynamic information in a non-invasive, non-traumatic type of examination. The examinations usually are relatively simple to perform and carry a very low risk of untoward reaction. The past decade has seen significant advances in radiopharmaceutical design and instrumentation. It is expected that the next decade will produce an even greater advance in this field.
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