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A New Reliable Method for Evaluating Gallbladder Dynamics: The 3-Dimensional Sonographic Examination.

Carla Serra1, Francesca Pallotti1, Mauro Bortolotti2

  • 1Department of Digestive System, Sant'Orsola-Malpighi Hospital and University of Bologna, Bologna, Italy (C.S., F.P., M.B., C.C., C.F., R.D.G., G.B.); and Laboratory of Biostatistics, Department of Medical and Surgical Sciences, Alma Mater Studiorum, University of Bologna, Bologna, Italy (E.N., A.M.M.L.).

Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine
|January 8, 2016
PubMed
Summary

Three-dimensional (3D) sonography offers a more reproducible method for assessing gallbladder volume and contractility compared to conventional 2D sonography. This advanced technique provides reliable results, even when performed by less experienced operators.

Keywords:
3-dimensional sonographycholecystokinetic stimulationgallbladder contractiongallbladder volumegastrointestinal ultrasound

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Area of Science:

  • Medical Imaging
  • Gastroenterology
  • Diagnostic Ultrasound

Background:

  • Conventional 2-dimensional (2D) B-mode sonography is widely used for gallbladder assessment.
  • Evaluating gallbladder volume and contractility is crucial for diagnosing various hepatobiliary conditions.
  • Limitations in 2D sonography's accuracy and reproducibility, especially by less experienced operators, necessitate exploring advanced imaging techniques.

Purpose of the Study:

  • To compare the accuracy and reproducibility of 3-dimensional (3D) sonography versus conventional 2D sonography in assessing gallbladder volume and contractility.
  • To evaluate the impact of operator skill on measurements obtained by both 2D and 3D sonography.
  • To determine the reliability of 3D sonography for gallbladder dynamic studies.

Main Methods:

  • 32 healthy volunteers underwent gallbladder evaluation using both 2D (ellipsoid method) and 3D (volumetric matrix probe) sonography.
  • Measurements were taken after fasting and postprandial states following a standardized meal.
  • Both skilled and unskilled sonographers performed the evaluations to assess operator dependency.

Main Results:

  • 3D sonography yielded significantly lower postprandial gallbladder volumes compared to 2D sonography (P=.013).
  • Significant differences in measurements were observed between skilled and unskilled operators for 2D sonography (P<.001), but not for 3D sonography.
  • 3D sonography demonstrated higher reproducibility in gallbladder volume evaluation, particularly in the postprandial state.

Conclusions:

  • 3D sonography with a volumetric matrix probe is a simple, reliable, and more reproducible technique than 2D sonography for gallbladder assessment.
  • The 3D method is less dependent on operator skill, offering consistent results even from unskilled operators.
  • This advanced 3D technique provides a reliable method for gallbladder dynamic studies and stimulation tests.