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Fig. 2 —Scatterplot of choline-citrate (Cho/Cit) ratio versus
apparent diffusion coefficient (ADC) for MR spectroscopy voxels with minimum
signal-to-noise ratio of 2. Tumor voxels (...) were those that contained 70%
or more tumor, as outlined on T2-weighted images. Peripheral zone voxels
(x) are non-tumor-containing voxels with at least 70% peripheral zone,
and central gland voxels (+) are non-tumor-containing voxels with 70% or more
central gland. Non-tumor-containing voxels, which do not reach either of these
classification thresholds, are labeled peripheral zone, central gland, or
central gland-peripheral zone mixed (
). Line optimally separating tumor
from nontumor voxels is shown.
