A patient support device for positioning the patient including a support frame and a chair connected to each other, wherein the chair includes a seat portion and a back portion connected to each other. The back portion is extending upward from the seat portion The back portion further includes two opposite ends, a first end and a second end and the back portion is connected at the second end to the seat portion The first end of the back portion determines horizontal axis A. The first end of the back portion is pivotally connected to the frame by a rotating mechanism so that the chair is arranged to rotate around axis A.
