CONTINUING EDUCATION Renal Cortical Scintigraphy and Diuresis Renography in Infants and Children*

Renal scintigraphy is performed frequently in infants and children. Renal cortical scintigraphy using 99mTc dimercaptosuccinic acid is predominantly performed to assess the renal sequelae of urinary tract infection. It is most commonly performed for the evaluation of chronic renal scars, although it is also undertaken in the assessment of acute pyelonephritis. Diuresis renography using 99mTc mercaptoacetyltriglycine is of great use in the evaluation of renal tract obstruction, which may occur at a variety of levels, but most commonly occurs at the ureteropelvic junction. Consensus statements have been formulated in an attempt to standardize methods of performing these investigations. However, several areas of controversy exist in the performance of these studies, and these are outlined. Radionuclide cystography and renal function estimation using clearance calculations are not covered in this article.