Axial tomography head holder

摘要

A head holder for an X-ray subject uses a rigid U-shaped receptacle having an angulated cervical extension that fastens to a patient supporting cradle. A head restraint sheet that may be preformed to a U-shape has a tie-down strap fastened to it is wrapped about the bottom and sides of a flexible foam preformed U-shaped liner that has notches for accommodating the subject's ears. The sheet and liner are deposited in the U-shaped rigid receptacle with the head of the subject in the liner and the strap ends crossed over the forehead and attached to "Velcro" pile that is fixed on the outside of the receptacle. The resilient foam liner and flexible sheet act as a pressure feedback system which restores a head to its initial relaxed position if the head has moved. A wedge is inserted between the flexible sheet and receptacle bottom to tilt the head of the subject.