Yes, the gallbladder is visualized on CT of the abdomen and pelvis.
The gallbladder is routinely included in the field of view of abdomen/pelvis CT scans and can be evaluated for various pathologies, though CT is not the primary imaging modality for gallbladder assessment 1.
What CT Can Show
CT abdomen/pelvis can detect multiple gallbladder features and pathologies:
Without IV Contrast
- Gallbladder wall thickening
- Pericholecystic inflammation
- Gas formation (emphysematous cholecystitis)
- Intraluminal hemorrhage
- Gallbladder perforation
- Gallstones (with approximately 75% sensitivity) 1
With IV Contrast (Provides Additional Information)
- Abnormal gallbladder wall enhancement in acute cholecystitis
- Adjacent liver parenchymal hyperemia (an early finding in acute cholecystitis and useful problem-solving tool)
- Absence of wall enhancement (suggests gangrene)
- Better characterization of complications 1
Important Limitations
Gallstone Detection
CT has only ~75% sensitivity for detecting gallstones, compared to ultrasound which is superior 1. Stone visibility depends on:
- Density difference between stone and bile
- Stone composition (calcified stones are readily apparent; cholesterol stones may be less dense than bile)
- Stone size
- Section thickness 2
Clinical Context
While CT can visualize the gallbladder, ultrasound remains the first-line imaging modality for suspected gallbladder disease due to higher sensitivity for stones, shorter study time, and ability to perform dynamic assessment 1.
Common Pitfalls
Contracted gallbladder can occur after bowel preparation (e.g., for colonoscopy), potentially leading to incomplete evaluation. In one study, 33% of patients showed >50% volume reduction, and 19% had gallbladder diameter <1.0 cm on same-day imaging 3.
A normal-appearing gallbladder on CT, especially a normal wall, makes acute gallbladder pathology very unlikely, with negative predictive value approaching 90% 1.
CT is typically most appropriate after ultrasound or cholescintigraphy when those studies are equivocal, or when evaluating for complications of cholecystitis 1.