MedX3D 1.2.0 is a package which contains extra nodes for H3DAPI. The source code for the package is released. For Windows users MedX3D is binary distributed with H3DAPI 2.1.1 or H3DViewer 2.1.1.
Grab MedX3D from the downloads section.
MedX3D is an implementation of the coming ( not known when ) Volume Rendering Component of the X3D specification. It includes nodes for volume rendering of for example medical data. MedX3D also contains some extra nodes/features not part of the Volume Rendering Component such as an implementation of the Marching Cubes algorithm.
MedX3D has support for reading files of different formats, e.g. raw file format, nrrd file format and DICOM file format.
MedX3D also contains a demo in which it is easy to change properties of the x3d nodes on the fly.
MedX3D 1.2.0 features new volume styles and improved volume rendering as well as various bug fixes.
For more information check out the MedX3D entry in the H3D wiki at http://www.h3dapi.org/modules/mediawiki/index.php/MedX3D