A method for acquiring an ultrasound image for rheumatoid arthritis examination includes receiving a hand in a scanning assembly that includes a transducer array and a fluid that provides acoustic coupling between the transducer array and the hand; Identifying the positions of a plurality of knuckles of the hand while stationary within. Ultrasound images of multiple finger joints are acquired with a transducer array while the hand is stationary within the scanning assembly, and the ultrasound images are smaller than the entire area of the hand based on the identified location of the finger joints of the hand. Of the region. [Selection] Figure 1
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