Table 1 Inclusion and exclusion criteria of patients for the study

Inclusion criteria

 Age > 18 years

 With a negative hepatitis B virus surface antigen and hepatitis C virus antibody

 Willingness to undergo ultrasound and magnetic resonance examinations

 Signed informed consent form

Exclusion criteria

 With a history of other liver disease or diabetes

 Excess alcoholic drinking [15] (≥ 20 g/day for men and ≥ 10 g/day for women)

 Taking hypolipidemic drug, liver protectant, or drugs that could cause steatosis

 With clinical symptoms or signs of other liver disease

 MR examination contraindications (such as claustrophobia, cardiac pacemakers or metal implants)

 Pregnant patients