Article

Ultrasound evaluation of gallbladder dyskinesia: comparison of scintigraphy and dynamic 3D and 4D ultrasound techniques.

Department of Radiology, Medical University of South Carolina, Charleston, 29425, USA.
American Journal of Roentgenology (Impact Factor: 2.9). 11/2011; 197(5):1103-10. DOI: 10.2214/AJR.10.5391
Source: PubMed

ABSTRACT The purpose of this study was to determine the efficacy of 3D and 4D ultrasound in correlation with hepatoiminodiacetic acid (HIDA) scanning for calculating gallbladder ejection fraction (EF).
A prospective study was conducted with 40 adult patients with suspected gallbladder dyskinesia. Cholecystokinin-provoked (99m)Tc-HIDA scintigraphy was performed, and concurrent 3D and 4D ultrasound images of the gallbladder were obtained before cholecystokinin infusion and 20, 30, and 40 minutes after infusion. The EF values calculated from the ultrasound images and HIDA scan were compared.
The gallbladder EF values (mean ± standard error of the mean) calculated 20 minutes after cholecystokinin infusion from HIDA scans and 3D and 4D ultrasound images were 54.1% ± 5.0%, 58.9% ± 6.3%, and 62.8% ± 5.5%. Thirty minutes after infusion the EF values were 56.3% ± 4.7%, 56.9% ± 5.7%, and 59.1% ± 4.6%. The numbers of patients with an EF less than 50% were 14, 12, and 13, and the numbers with an EF less than 35% were 10, seven, and eight. For the patients with an EF less than 50%, the kappa agreement between HIDA scanning and 3D ultrasound was 0.89 (95% CI, 0.73-1.00), between HIDA scanning and 4D ultrasound was 0.83 (95% CI, 0.65-1.00), and between 3D and 4D ultrasound was 0.83 (95% CI, 0.64-1.00).
Both 3D and 4D ultrasound techniques correlate well with HIDA scanning for calculating gallbladder EF in patients with suspected biliary dyskinesia.

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    ABSTRACT: OBJECTIVE. The objectives of our study were to assess the feasibility of dynamic CT and MR cholangiography during gallbladder stimulation, to compare CT and MR cholangiography with biliary scintigraphy, and to identify morphologic differences between patients with functional biliary pain and healthy control subjects. SUBJECTS AND METHODS. In this prospective study, 30 patients with functional biliary pain underwent biliary scintigraphy, CT cholangiography, and MR cholangiography before and during 45-minute sincalide infusions. Thirty healthy control subjects also underwent MR cholangiography with sincalide infusion. IV contrast agents (iodipamide meglumine or gadobenate dimeglumine) were administered before scanning. CT and MR images were qualitatively and quantitatively analyzed. RESULTS. Diagnostic images were obtained of all participants. There was good agreement for gallbladder ejection fraction (EF) at 40 minutes by all three methods (Lin's concordance correlation coefficient ≥ 0.6). Gallbladder contraction and refilling occurred more promptly by CT and MR cholangiography than scintigraphy. CT and MR cholangiography showed previously un-diagnosed gallstones in two patients (7%). Gallbladder shape was categorized as straight, curved, or folded; a folded gallbladder was present in 37% and 23% of patients at baseline and 40 minutes, respectively, versus in 3% of control subjects at both times (p ≤ 0.004). Asymmetric patterns of gallbladder contraction occurred in 10 patients (33%) and four control subjects (13%) (p = 0.13). CONCLUSION. Dynamic CT cholangiography and MR cholangiography performed during pharmacologic stimulation accurately measure gallbladder EFs and detect missed gallstones. Gallbladder shape before and during contraction differs between patients with functional biliary pain and healthy control subjects. Dynamic CT cholangiography and MR cholangiography are promising techniques that might improve selection of patients to undergo cholecystectomy for functional biliary pain.
    American Journal of Roentgenology 05/2013; · 2.90 Impact Factor

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