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Updated: May 30, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Radiation exposure during pediatric videourodynamics.

Tin C Ngo¹, Curtis J Clark, Colleen Wynne

¹Stanford University School of Medicine, Stanford, California 94305, USA.

The Journal of Urology

|August 25, 2011

Summary

Videourodynamics in children involves radiation exposure. Patient weight and bladder capacity are key factors influencing this exposure, aiding in risk assessment and counseling.

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Area of Science:

Pediatric Urology
Medical Imaging
Radiation Safety

Background:

Videourodynamics is crucial for diagnosing and managing pediatric neurological disorders.
It combines functional urodynamic assessment with anatomical visualization of the urinary tract.
However, this diagnostic approach involves radiation exposure for children.

Purpose of the Study:

To characterize and quantify radiation exposure associated with videourodynamics in pediatric patients.
To identify patient-specific factors that predict radiation dose during videourodynamics.

Main Methods:

A retrospective review of 64 videourodynamic studies was conducted.
Data collected included patient demographics, diagnoses, fluoroscopy time, and radiation dose (mGy).
Multivariate linear regression analysis identified independent predictors of radiation exposure.

Main Results:

The mean radiation exposure was 10 mGy (95% CI 7.5-13.3) over a mean fluoroscopy time of 1.8 minutes.
Patient weight and bladder capacity were identified as the sole independent predictors of total radiation exposure.
The study included 64 children (34 female, 28 male) with a mean age of 8.6 years, most commonly diagnosed with neurogenic bladder.

Conclusions:

Videourodynamics is associated with significant radiation exposure in children.
Physician awareness of these findings can promote judicious fluoroscopy use and inform parental counseling.
Further research is needed to assess organ-specific doses and long-term cancer risks from pediatric medical imaging.