DMSA

One gives Tc-DMSA and takes pictures 3 hours later. The DMSA is a favourite snack of the PROXIMAL TUBULAR KIDNEY CELLS.

If there is renal failure then the 3 hour pictures will be clouded over by soft tissue contrast, so need to wait another 3 hours.

All that the DMSA will tell you is whether the kidneys are normal size and whether there is any scarring of the cortex.