Whole-Brain N-Acetylaspartate Spectroscopy and Diffusion Tensor Imaging in Patients with Newly Diagnosed Gliomas: A Preliminary Study
M. Inglesea,
S. Browna,
G. Johnsona,
M. Lawa,
E. Knoppa and
O. Gonena
a From the Department of Radiology, New York University School of Medicine, NY

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Fig 1. A, Top left, axial T2-weighted MR image of a section containing the lesion (mixed glioneurocytoma grade II) in patient 4 in the Table.
B, Top right, postcontrast T1-weighted image of the same section.
C, Bottom left, DTI (b = 0) image from the same level as A and B and the contralateral NAWM ROIs used for the MD and FA analyses 3.
D, Bottom right, color-coded MD map of the same section showing the marked elevated MD in the tumor and surrounding tissue, analogous to regions 1 and 2 in C. Note that the ROI selected does not contain any apparent tissue abnormalities.
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Fig 2. Scatterplot of WBNAA versus MD for the 10 patients (black circles) and 9 controls (white circles). The WBNAA deficit strongly inversely correlates with MD increase (r = 0.879, P = .01) in patients (WBNAA = 18.69.MD + 27.65, solid line) but not in controls (r = 0.012, P = .975, dashed line).
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