[Magnetic resonance imaging for the wrist joint of the coal miners in vibration department].

Objective: To study the magnetic resonance imaging (MRI) in the wrist joint of coal miners who work in excavation and vibration department.

Methods: Forty-three coal miners with the hand-arm vibration disease served as the observation group while 20 workers who were not working in the vibration department acted as the control group. The patients in the observation group were divided into five subgroups according to the time when they received vibration.