A sterile drape for an o-shaped CT scanner and method of draping an O-shaped CT scanner therewith is provided. The sterile drape has a sterile, flexible tubular wall extending between opposite first and second ends. The first end is open and the second end is substantially closed. The wall has a first seam adjacent the second end. The first seam extends along a circumference of the wall to facilitate forming an opening in the wall adjacent the second end to allow the CT scanner to be fully closed through the opening.