An apparatus having at least one anatomical support member which comprises at least one layer of laminar sheeting and at least one articulating joint unit is in engagement with the at least one of anatomical support member. The joint is positionable in at least a vertical and horizontal orientations enabling smooth positioning of portions of an anatomy in three dimensions such that translational and/or rotational centrepoints in its x, y and z axes substantially coincide. The joint is preferably made of by material(s) that do not cause substantial radiographic or nuclear imaging artifacts when medically imaged thereby.