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Related Experiment Videos

Four-dimensional ultrasonography for dynamic bladder shape visualization and analysis during voiding.

Naoki Hirahara1, Osamu Ukimura, So Ushijima

  • 1Department of Urology, Kyoto Prefectural University of Medicine, Kawaramachi-Hirokoji, Kyoto 602-8566, Japan.

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
|February 24, 2006
PubMed
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Four-dimensional ultrasonography (4DUS) effectively visualizes dynamic bladder changes during voiding. This noninvasive method correlates well with uroflowmetry, offering potential for improved understanding of lower urinary tract symptoms.

Area of Science:

  • Urology
  • Medical Imaging
  • Diagnostic Technology

Background:

  • Lower urinary tract symptoms (LUTS) affect many individuals, necessitating improved diagnostic tools.
  • Current urodynamic methods can be invasive and may not fully capture dynamic bladder function.
  • Accurate assessment of bladder voiding dynamics is crucial for diagnosing and managing LUTS.

Purpose of the Study:

  • To evaluate the initial applications of 4DUS for dynamic 3D bladder shape visualization.
  • To analyze intravesical volume and diameter changes during voiding using 4DUS.
  • To assess the correlation between 4DUS measurements and uroflowmetry data.

Main Methods:

  • Transabdominal 4DUS was used to image the bladders of 15 healthy volunteers and 5 patients with LUTS during voiding.

Related Experiment Videos

  • 3D bladder shape, intravesical volume, and diameters (axial, coronal, sagittal) were measured.
  • 4DUS data were compared with standard uroflowmetry results.

    • Main Results:

    • Dynamic 3D visualization of bladder shape during voiding was successful in all participants.
    • 4DUS-derived intravesical volume change and decrease rates correlated significantly with average and maximum flow rates.
    • Coronal diameter changes showed the strongest correlation with intravesical volume changes (P < .0001).

    Conclusions:

    • 4DUS is a feasible method for monitoring bladder voiding in both healthy individuals and patients with LUTS.
    • 4DUS shows potential as a novel, noninvasive urodynamic tool for dynamic lower urinary tract visualization.
    • This technology may enhance the pathophysiologic understanding of voiding dysfunction.