We completed the 1st of our work we intended i.e. we were successfully able to built a simple tool which visualized a MRI scan data. We also wrote a paper and here is our code which does the work only it requires the standard headsq data which comes with vtk data. (Vtk should be installed in the system of course.)
box widget applied to the data. User Interface
vtk installation instuction, set up and other datails can be found here.