Spectral CT Detection of Entrapped Gallstone Based on Z-effective Map

Abstract

Gallstone disease and related cholecystitis are common clinical conditions for which ultrasound is the diagnostic method of choice. Computed Tomography (CT) can help in difficult and inconclusive cases. We present a case of a patient with a final diagnosis of an entrapped gallstone causing subacute cholecystitis, detected first with a spectral CT and the use of the mean atomic number display map of the gallbladder content.

Keywords

• gallstone disease
• tomography
• X-ray computed
• cholesterol gallstones
• dual-energy CT
• spectral CT
• effective Z map