Micturition cystourethrography using X-ray or scintigraphy in children with reflux

Area of Science:

• Pediatric Nephrology
• Diagnostic Imaging
• Radiation Safety

Background:

• First-time urinary tract infections (UTIs) in children can indicate underlying conditions like vesicoure ureteral reflux (VUR).
• Accurate diagnosis of VUR is crucial for preventing renal scarring and long-term complications.
• Traditional diagnostic methods involve radiation exposure, prompting the search for safer alternatives.

Purpose of the Study:

• To compare the diagnostic efficacy of scintigraphy versus micturition cystourethrography (MCUG) for detecting VUR in children.
• To evaluate the radiation dose associated with each imaging modality.
• To recommend the optimal imaging technique for routine VUR screening in pediatric patients.

Main Methods:

• A cohort of thirty children with a first-time UTI underwent both MCUG (X-ray) and scintigraphy.
• Both diagnostic procedures were performed after bladder catheterization.
• Radiation doses were compared, focusing on scintigraphy's lower dose compared to fluoroscopy during MCUG.

Main Results:

• Scintigraphy detected reflux to the renal pelvis more frequently than MCUG.
• The nosographic sensitivity and predictive value of a negative test were comparable between the two methods (approximately 0.90).
• Scintigraphy delivered less than 10% of the radiation dose associated with MCUG fluoroscopy.

Conclusions:

• Scintigraphy is a highly effective and safer alternative for diagnosing VUR in children.
• The comparable diagnostic accuracy and significantly lower radiation dose support the use of scintigraphy for routine VUR screening.
• Routine implementation of scintigraphy can reduce radiation exposure in pediatric patients undergoing VUR evaluation.