Access to resources on a computer may be provided by using a first namespace of resources and a second namespace of resources, where one or more names are common to both namespaces and those names refer to different respective instances of resources. The volumetric data visualizations generally take the form of volumetric images which approximate the spatial distribution of an x-ray attenuation coefficient throughout the region of interest in the object, such as a person, under examination. , a white color fluorescent tube W, a red color fluorescent tube R, a green color fluorescent tube G, and a blue color fluorescent tube B, are arranged on both end in a longitudinal direction of a light guide plate respectively. This parallel capacitor is located inside an area surrounded by the transformer, the switching device and the electrolytic capacitor to reduce a circuit area where electromagnetic radiation noise is generated.