Abstract: An RF coil assembly for an MRI system may include a coil support and an RF coil. The coil support may include a base, a first adjusting arm and a second adjusting arm. The first adjusting arm is rotatably connected to the base and rotatable about a first axis relative to the base. The second adjusting arm is rotatably connected to the first adjusting arm and rotatable about a second axis relative to the first adjusting arm, the second axis being parallel to the first axis. The RF coil is rotatably connected to the second adjusting arm and rotatable about a third axis relative to the second adjusting arm, the third axis being parallel to the first axis. The position and angle of the RF coil can be flexibly adjusted so that the RF coil fits the examination subject more closely, thus helping to increase imaging quality.