Which test is generally less expensive and easier to perform for diagnosing cholecystitis?

Ultrasound is generally less expensive and easier to perform for diagnosing cholecystitis compared to other imaging modalities. It is a non-invasive test that can be conducted quickly in an outpatient setting, making it widely accessible and efficient for initial evaluation.

The ultrasound examination can reveal the presence of gallstones, gallbladder wall thickening, and pericholecystic fluid, which are all indicators of cholecystitis. Its portability and the fact that it does not involve ionizing radiation also add to its advantages in various clinical settings.

In contrast, a CT scan and HIDA scan, while useful diagnostic tools, are typically more costly and may take longer to interpret. MRCP, being a specialized MRI technique for evaluating bile ducts, is also more expensive and less commonly used as a first-line screening for cholecystitis. Therefore, ultrasound remains the preferred initial imaging study due to its practicality and effectiveness in the diagnosis of this condition.