Which imaging technique is used for gallbladder stones?

Ultrasound is the preferred imaging technique for detecting gallbladder stones due to its effectiveness in visualizing the biliary system and is non-invasive, with no exposure to ionizing radiation. It uses sound waves to create images of the internal organs, which can clearly show the presence of gallstones, their size, and their location within the gallbladder.

This imaging modality is particularly suited for gallbladder evaluation because it is not only good at identifying stones but is also able to assess for potential complications, such as cholecystitis. Additionally, ultrasound can be performed at the bedside, making it a practical option in emergencies.

While X-rays can detect some types of gallstones, they are not reliable for this purpose since many gallstones (especially cholesterol stones) are radiolucent and won't be visible. CT scans with contrast can offer detailed images of the gallbladder and surrounding structures but may not be the first-line investigation specifically for gallstones due to cost, radiation exposure, and the availability of ultrasound. MRI is useful for assessing soft tissue and bile duct disorders related to gallbladder disease but is typically not employed primarily to identify gallstones.

Thus, the use of ultrasound as a first-line diagnostic tool for gallbl