FIG 5. a–d, Real part of the proton spectra from the VOIs on the corresponding images in figure 4. The spectra from the tumor in slices c and d in the dashed circle and regions of elevated 2>Cho:Cr>1.3 are shaded. All spectra display the 4.0 to 0.5 ppm chemical shift range and are plotted on the same vertical scale, and each represents the signal from a 1.5-cm³ voxel