Which is more accurate for diagnosing gallstones, CT or ultrasound?

Both CT and ultrasound can diagnose the size and volume of gallstones, so it is not possible to determine which method is more accurate. The choice should be based on the patient’s individual condition. The detailed analysis is as follows:

Under normal circumstances, ultrasound is the most common and preferred diagnostic method. It is relatively low-cost and offers high detection rates and diagnostic accuracy for most gallstones. Ultrasound is particularly effective for detecting small stones and mild cholecystitis. In contrast, CT scanning can more precisely determine the exact location and size of gallstones and may be more accurate and reliable for patients with complex biliary stones or complications such as bile duct dilation or gallbladder cancer. However, CT involves a higher radiation dose and should be used cautiously in special populations such as pregnant women and children. Since both ultrasound and CT can detect gallstones, it is not possible to compare which is more accurate.

Both ultrasound and CT have unique advantages and indications in diagnosing gallstones. The choice between the two should be made based on the patient's specific condition, physician recommendations, and availability of medical equipment.