Total number of patients: 9

Naming convention:
[PatientID]_[timepoint].MHA

Timepoint t0: Pre-treatment
Timepoint t1: During treatment
Timepoint t2: Post-treatment
Timepoint t3: Additional post-treatment

MHA is a standard text-based tagged file format for medical images.
Additional details on how to read MHA files is available at: http://www.itk.org/Wiki/MetaIO/Documentation

Programs to visualize MHA files include Slicer 3D (slicer3d.org) or ParaView (paraview.org).