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Description
Relative renal function and differences in the images of kidneys through renal gammagraphy with radiopharmaceutical $^{99m}$Tc-MAG3 and $^{99m}$Tc-DMSA was compared. For the study a sample of 50 patients was analyzed, in which 75% were children. Images were acquired with a double-headed AnyScan SC gamma camera of MEDISO Company. The renal gammagraphy with $^{99m}$Tc-MAG3 was processed as a DMSA study, using the DMSA protocol, taking the sum of first images. Comparison in RRF of left kidney (used as reference) between both studies show a correlation coefficient of 0.996 and a slope value of 1.02±0.01. The images were analyzed by nuclear physicians of ten or more years of experience leading to similar conclusion that sum first images of $^{99m}$Tc-MAG3 renography can be informed as a DMSA study, only when in the diagnosis the patient doesn’t present ectopic kidneys. This results show that relative renal function obtained in a DMSA study can be obtained through a renography with $^{99m}$Tc-MAG3 taking the first images previous to pelvis drainage. In this we can avoid overexposed patients submitted to both studies, avoiding loss of time and guarantee savings of material.
