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Early diagnosis of cholecystolithiasis is significant for prevention of further development of situation. Ultrasound is the best choice for the diagnosis of cholecystolithiasis with a sensitivity of 95% and specificity of practically 100%. However, ultrasound is not perfect for it is not so clear sometimes. So, MRI is needed to assist the diagnosing of cholecystolithiasis. Some studies have been conducted to investigate the diagnostic value of ultrasound combined with MRI in cholecystolithiasis, however, the evidence was not enough. We wi