Fig. 2.

Identifying voxels of the TVZ and eliminating partial volume effects in an NF1 patient. A 2 mm exclusion gap (white) was placed directly adjacent to the anterior-inferior aspect of the third ventricle wall, visualized on a T2-weighted image (A), and was confined by the anterior and posterior borders of the ventricle. The TVZ transition zone voxels (cyan) were placed directly adjacent to the exclusion gap. Measures of the ADC (B) and nCBF (C) in the TVZ voxels were collected. Focal abnormal signal intensities (red) and tumour were excluded from TVZ ROIs. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)