Surgical Planning Laboratory - Brigham & Women's Hospital - Boston, Massachusetts USA - a teaching affiliate of Harvard Medical School

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Figure 4: <b>Synthetic Imagery Results.</b> A sphere is mapped to its deformed counterpart. In the lower image we show the deformation vector field. It is clearly visible that the magnitude of deformation is maximum at the top where the dent is and it decays smoothly inside the sphere. Data size 128<sup>3</sup> )
Figure 4: Synthetic Imagery Results. A sphere is mapped to its deformed counterpart. In the lower image we show the deformation vector field. It is clearly visible that the magnitude of deformation is maximum at the top where the dent is and it decays smoothly inside the sphere. Data size 1283 )
Figure 6: Visualization of the geometric diffusion indices.
Figure 6: Visualization of the geometric diffusion indices.
Results of tract parameterization and FA group comparison. Footnote: FA distributions along the tracts, and group differences for tracts interconnecting IC and three Brodmann areas (BAs). In the left column, thicker lines represent group differences at a < 0.05 corrected using false discovery rate (FDR)). Middle column illustrates logarithmically scaled P values, with the red line representing significance cut-off. Right-hand column shows ROIs used (IC- dark pink, BAs- dark cyan).
Results of tract parameterization and FA group comparison. Footnote: FA distributions along the tracts, and group differences for tracts interconnecting IC and three Brodmann areas (BAs). In the left column, thicker lines represent group differences at a < 0.05 corrected using false discovery rate (FDR)). Middle column illustrates logarithmically scaled P values, with the red line representing significance cut-off. Right-hand column shows ROIs used (IC- dark pink, BAs- dark cyan).
Figure 6: Seven superposed composite models.
Figure 6: Seven superposed composite models.
Figure 4: Effects of age on signal intensities sampled at different distances from the WM surface. Statistical p maps showing the results from GLMs testing the effect of age on signal intensity mapped at six different distances from the white surface. Cold colors indicate attenuated signal with advancing age while warm color indicate the opposite relation. The statistical maps were thresholded at p b 10− 6 to allow for visual inspection of regional variability over measures. Mean ventricle CSF intensity for each subject was included in the models to account for scanner related noise.
Figure 4: Effects of age on signal intensities sampled at different distances from the WM surface. Statistical p maps showing the results from GLMs testing the effect of age on signal intensity mapped at six different distances from the white surface. Cold colors indicate attenuated signal with advancing age while warm color indicate the opposite relation. The statistical maps were thresholded at p b 10− 6 to allow for visual inspection of regional variability over measures. Mean ventricle CSF intensity for each subject was included in the models to account for scanner related noise.
Figure 2: FreeSurfer manual registration tool (tkregister2), coronal and sagittal views. (A) T1-weighted anatomical with white surface. (B) T2<sup>⁎</sup>-weighted Functional. The cortex can be seen as bright patches against the darker white matter. (C, D) Functional with surface placed by the given registration technique. (C) CR. (D) NMI. (E). BBR. The green arrows are in the same place relative to the surface in each panel and indicate places where the registration in CR or NMI are inaccurate.
Figure 2: FreeSurfer manual registration tool (tkregister2), coronal and sagittal views. (A) T1-weighted anatomical with white surface. (B) T2⁎-weighted Functional. The cortex can be seen as bright patches against the darker white matter. (C, D) Functional with surface placed by the given registration technique. (C) CR. (D) NMI. (E). BBR. The green arrows are in the same place relative to the surface in each panel and indicate places where the registration in CR or NMI are inaccurate.
Figure 1: Tissue sampling method. A. Gray matter was sampled 35% through the total cortical thickness (blue surface; between 1 and 2 mm normal to the gray/white border (orange surface)), and white matter was sampled at a constant distance of 1 mm (green surface). This conservative sampling procedure assured that most measures were obtained from neighboring voxels, or voxels separated by one to two voxels in between. B. An example of an older adult with low contrast (left) and an older adult with high contrast (right) in the same region. C. Mean maps of signal intensities and GWR in young adults demonstrate the variation in these measures across the surface of the cortex.
Figure 1: Tissue sampling method. A. Gray matter was sampled 35% through the total cortical thickness (blue surface; between 1 and 2 mm normal to the gray/white border (orange surface)), and white matter was sampled at a constant distance of 1 mm (green surface). This conservative sampling procedure assured that most measures were obtained from neighboring voxels, or voxels separated by one to two voxels in between. B. An example of an older adult with low contrast (left) and an older adult with high contrast (right) in the same region. C. Mean maps of signal intensities and GWR in young adults demonstrate the variation in these measures across the surface of the cortex.
Figure 2: A. Corpus callosum overlaid on the midsagittal section. B. Parcellation of the corpus callosum according to the Witelson scheme. Each segment is labeled with a different color. The segments from left to right correspond to the anterior third, anterior midbody, posterior midbody, isthmus, and splenium.
Figure 2: A. Corpus callosum overlaid on the midsagittal section. B. Parcellation of the corpus callosum according to the Witelson scheme. Each segment is labeled with a different color. The segments from left to right correspond to the anterior third, anterior midbody, posterior midbody, isthmus, and splenium.
Figure 5: Normalized square of the acoustic field pressure on the x-z plane (y = 0): a) sinusoidal CW (no PSK), b) sequential BPSK, c) random BPSK, d)sequential QPSK, and e) random QPSK.
Figure 5: Normalized square of the acoustic field pressure on the x-z plane (y = 0): a) sinusoidal CW (no PSK), b) sequential BPSK, c) random BPSK, d)sequential QPSK, and e) random QPSK.
Figure 2: a,b. In the checkerboard display between the preoperative image (before deformation) and intraoperative image, a black line indicates a contour of the total gland, whereas a white line indicates a contour of the central gland. a: The contours showed discrepancy at white arrows. b: In a checkerboard display between deformed preoperative and intraoperative images, the contours match closely after registration has been performed. A slight discrepancy remained at the posterior part of the prostate (black arrow).
Figure 2: a,b. In the checkerboard display between the preoperative image (before deformation) and intraoperative image, a black line indicates a contour of the total gland, whereas a white line indicates a contour of the central gland. a: The contours showed discrepancy at white arrows. b: In a checkerboard display between deformed preoperative and intraoperative images, the contours match closely after registration has been performed. A slight discrepancy remained at the posterior part of the prostate (black arrow).
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