A guide plate, on which a carrier runs in a guide element around a pivot point, is laterally secured to the examination table. An arm rest is arranged at the carrier, this arm rest being rotatable in the carrier around an axis that lies on a line extending between the pivot point and the...http://www.google.com.au/patents/US5697164?utm_source=gb-gplus-sharePatent US5697164 - Movable positioning aid permitting abduction and rotation of the shoulder joint for a kinematic imaging examination thereof 
