Abstract: The present invention provides an apparatus for displaying a two-dimensional cross-sectional image of an arbitrary base plane which matches to the subject's head without creating extra labor to the operator even when the subject's head is asymmetrical. The apparatus is connected to a display unit for displaying a cross-sectional image of a head. The apparatus comprising: a conversion parameter obtaining unit for obtaining a conversion parameter indicating a difference in shape between a standard head and a subject's head based on a volume data; a subject base plane generating unit for generating an anatomical base plane of the subject's head based on the conversion parameter and an anatomical base plane of the standard head; and a cross-sectional reconstruction unit for generating a cross-sectional image of the anatomical base plane of the subject's head based on the volume data of the subject's head and displaying said cross-sectional image on the display unit.

Abstract: A spine immobilization tool that can control the movement of the spine with improved safety as a spine immobilization tool that includes a first covering portion, a second covering portion, and a joint portion. The first covering portion covers at least a part of a vertebral arch of a vertebra at a head-side among the adjacent vertebrae, and thus can be fixed to the vertebra. The second covering portion covers at least a part of a vertebral arch of a vertebra at a buttock side amongst the adjacent vertebrae, and thus can be fixed to the vertebra. The joint portion couples the first covering portion and the second covering portion together while allowing changing relative positions of the first covering portion and the second covering portion.