Detection of Vesicoureteral Reflux Using Electrical Impedance Tomography

Area of Science:

• Biomedical Engineering
• Medical Imaging
• Urology

Background:

• Vesicoureteral reflux (VUR) is a common congenital urinary tract abnormality in children, leading to infections and kidney damage.
• Current diagnostic methods like voiding cystourethrograms are invasive and involve ionizing radiation.
• There is a significant need for noninvasive VUR detection methods, especially for pediatric screening.

Purpose of the Study:

• To evaluate the efficacy of electrical impedance tomography (EIT) for noninvasive detection of vesicoureteral reflux (VUR).
• To assess EIT's potential as a screening tool for VUR in pediatric populations.

Main Methods:

• Porcine models were used, with urine-mimicking solution infused into ureters.
• EIT measurements were recorded using abdominal electrodes before, during, and after infusion.
• Data analysis involved statistical assessment of voltage signals and reconstructed EIT images.

Main Results:

• Unilateral VUR was detected with high accuracy: 94.83% via voltage signals and over 98.28% via reconstructed images.
• EIT images demonstrated clear visual contrast between the reflux area and surrounding tissues.
• The method proved successful in identifying reflux in animal models.

Conclusions:

• EIT demonstrates high accuracy in detecting VUR in animal models.
• The findings suggest EIT's potential as a noninvasive screening tool for VUR in children.
• This technology offers a promising alternative to invasive diagnostic procedures.