Figure 4. Graphs showing serial changes in volume of the enhancing abnormality (EA), T2 non-enhanceing abnormality (NEA) and magnetization transfer ratio (MTR)-NEA for Patient 1 (top left), Patient 2 (top right), Patient 3 (bottom left) and Patient 4 (bottom right). The horizontally shaded bar on the x-axis represents the period of radiotherapy.