Benign gallbladder diseases: Imaging techniques and tips for differentiating with malignant gallbladder diseases

Figure 5 Sludge ball. A, B: Ultrasound imaging of movable intraluminal echogenic mass-like gallbladder lesion, without posterior acoustic shadowing, internal vascularity absent by color Doppler ultrasound (B); C, D: high-attenuated intraluminal mass on precontrast computed tomography (C), with no enhancement on post-contrast computed tomography (D).