Contrast-enhanced computed tomography of the normal and abnormal gallbladder

Area of Science:

• Radiology
• Medical Imaging
• Gastroenterology

Background:

• Gallbladder wall thickness and attenuation on computed tomography (CT) can be indicators of disease.
• Differentiating between chronic pancreatitis, chronic biliary disease, and normal findings is crucial for patient management.

Purpose of the Study:

• To evaluate and compare gallbladder wall attenuation and thickness using CT in patients with and without biliary or pancreatic disease.
• To determine if CT findings can reliably distinguish between chronic pancreatitis, chronic biliary disease, and normal gallbladder wall characteristics.

Main Methods:

• Retrospective review of 114 upper abdominal CT examinations.
• Analysis of gallbladder wall attenuation (Hounsfield Units) before and after intravenous contrast administration.
• Measurement of gallbladder wall thickness (mm) in patients with normal findings, chronic pancreatitis, and chronic biliary disease.

Main Results:

• No statistically significant difference in gallbladder wall attenuation or enhancement was observed between normal patients and those with chronic pancreatitis.
• Patients with chronic biliary disease exhibited a statistically significant increase in gallbladder wall thickness and higher pre-contrast attenuation compared to normal controls.
• The degree of gallbladder wall enhancement after contrast was statistically significant across all groups.

Conclusions:

• CT-based gallbladder wall attenuation and enhancement characteristics do not reliably differentiate between normal findings and chronic pancreatitis.
• Increased gallbladder wall thickness and pre-contrast attenuation on CT are indicative of chronic biliary disease.
• CT remains a valuable tool for assessing gallbladder pathology, with specific findings suggestive of biliary disease.