A Study on Predicting Split Renal Function Using Renal Blood Flow Weighted Estimated Glomerular Filtration Rate From...

Area of Science:

• Medical Imaging
• Nephrology
• Radiology

Background:

• Traditional methods for split renal function assessment, such as CT and radionuclide imaging, involve ionizing radiation or nephrotoxic contrast agents.
• These limitations highlight the need for safer, effective alternatives in evaluating kidney function.

Purpose of the Study:

• To evaluate the utility of renal blood flow (RBF)-weighted estimated glomerular filtration rate (eGFR) derived from arterial spin labeling (ASL)-MRI.
• To predict split renal function in patients with suspected renal artery stenosis (RAS).

Main Methods:

• A retrospective study involving 53 patients with suspected RAS and renal insufficiency.
• Renal ASL-MRI was performed at 1.5T using a 3D pseudo-continuous ASL technique.
• RBF-weighted eGFR (RBFw eGFR) was calculated and compared to radionuclide GFR (rGFR) as the reference standard.

Main Results:

• RBFw eGFR demonstrated strong significant correlations with rGFR (r ≈ 0.80).
• High diagnostic efficiency was observed for differentiating varying degrees of renal insufficiency (AUCs ranging from 0.865 to 0.936).

Conclusions:

• ASL-MRI-derived RBFw eGFR is a valuable tool for assessing split renal function.
• This technique shows significant correlation with rGFR and high accuracy in differentiating renal dysfunction, offering a potential non-invasive alternative for patients with RAS.