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Learn to differentiate between normal gallbladder anatomy and various pathological conditions through detailed CT imaging analysis. Master the identification of normal gallbladder parameters including standard length (≤10 cm), width (≤4 cm), and wall thickness (≤3 mm), while understanding the characteristic low-attenuation appearance of the fluid-filled lumen. Explore the diagnostic features of acute cholecystitis, including enlarged gallbladder dimensions, hyperdense gallstones, increased wall thickness, mucosal hyperenhancement, and pericholecystic fat stranding. Examine the tensile gallbladder fundus sign as an early indicator of acute cholecystitis, characterized by fundal bulging and abdominal wall distortion. Study the critical signs of gangrenous cholecystitis, including wall irregularities, intraluminal membrane formation, absent wall enhancement, and the presence of air bubbles in emphysematous cases.
