Everything looks good. You have loaded the 3D volume successfully! The easiest way to show this in 3D is to go to Data module and drag-and-drop the image volume into the 3D view. You can get even nicer results if you use the Echo volume render module of SliceHeart.
Echo volume rendering settings:
Echo Volume rendering video:
Microdicom and other basic viewers just replay the screenshots of the rendering. That looks nice but has very limited use, because you cannot rotate the view, you cannot do any measurements, analysis, 3D segmentation, etc. The screenshots look like this:
