A simple method for determining split renal function from dynamic (99m)Tc-MAG3 scintigraphic data.

Area of Science:

• Nuclear Medicine
• Radiopharmacology
• Renal Physiology

Background:

• Traditional split renal function (SRF) methods require complex background and vascular corrections.
• These corrections can lead to inaccurate SRF estimates and implementation challenges.

Purpose of the Study:

• To evaluate the novel blood pool compensation (BPC) technique for determining SRF.
• The BPC method aims for simplicity, eliminating extrarenal background correction and intrinsic vascular activity compensation.

Main Methods:

• SRF was calculated using the BPC method from parametric plots of blood-pool and renal regions of interest (ROIs).
• Data from 107 patients undergoing (99m)Tc-MAG3 scintigraphy were analyzed.
• BPC results were compared to integral (IN) and Patlak-Rutland (PR) methods using Bland-Altman and Passing-Bablok analyses.
• Interobserver variability of the BPC technique was assessed.

Main Results:

• BPC-derived SRF values showed no significant difference or consistent bias compared to the PR method.
• The IN method yielded significantly different SRF values with bias compared to both PR and BPC methods.
• No significant interobserver variability was observed for the BPC technique.

Conclusions:

• The BPC method offers a simple, reliable approach for estimating SRF using only three ROIs.
• It provides statistically equivalent results to the PR method with good interobserver agreement.
• The BPC technique represents a valuable new tool for quality control in monitoring relative kidney function.