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AJNR - American Journal of Neuroradiology

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Method for Quantitatively Evaluating the Lateralization of Linguistic Function Using Functional MR Imaging

Shun-ichi Nagata^,a, Koichi Uchimura^a, Wataru Hirakawa^a and Jun-ichi Kuratsu^a

^a From the Department of Neurosurgery, Faculty of Medicine, Kagoshima University, 8-35-1 Sakuragaoka, Kagoshima City, Japan, 890-8520.

View larger version (10K): [in a new window]   FIG 1. A and B, Scatter diagrams for subjects 5 (A) and 10 (B). Circles indicate the values for the left ROI; squares, for the right ROI

View larger version (159K): [in a new window]   FIG 2. A–D, Brain activity images (viewed from below) of subject 5 at thresholds 1.0 (A) and 1.5 (B) and of subject 10 at thresholds 1.0 (C) and 1.5 (D). Black boxes indicate ROIs

View larger version (14K): [in a new window]   FIG 3. A–C, The mean correlation coefficient between (1/z score), (1/z score)2. . . (1/z score)10, and the number of activated pixels for all subjects on both sides (A), on the left side (B), and on the right side (C)

View larger version (16K): [in a new window]   FIG 4. A and B, The regression line of subjects 5 (A) and 10 (B). Circles indicate the left ROI; squares, the right ROI. The underlined fixed values indicate the regression coefficient of the regression line for each ROI (regression analysis, R; correlation coefficient)

View larger version (12K): [in a new window]   FIG 5. Scatter plot shows gap between LI-1 and LI-2 (regression analysis, r2 = .244, P < .01, n = 28)

View larger version (11K): [in a new window]   FIG 6. Scatter plot for LI-1 versus LI-2 for subjects 12 through 17