The device according to the disclosure is for stabilising a patient in a desired position during X-ray knee imaging. By default, a tibial inclination angle of 10 is envisaged, as according to statistics this constitutes an inclination for the ideal imaging of the knee joint space. This angle as well as the foot rotation angle are adjustable. The device is suitable for a majority of different body heights and shapes. Equipment sensors determine the achievement of the desired position and this is confirmed to the X-ray technician by means of an acoustic and optical transducer.

A portable radiographic imaging apparatus includes a sensor and a case that houses sensor panel. Radiation detector elements are arrayed two-dimensionally in the sensor panel. The case comprises a corner where two side walls are adjacent. The side walls are made of a continuous fiber reinforced resin that comprises one or more fiber layers oriented in a predetermined direction. The fiber layers are oriented in a direction from one to the other of the adjacent side walls in the corner. A breakpoint where the fiber layers are discontinuous over an entire thickness in a wall thickness direction is not present in an area of at least one of the corners.