392 ms; flip angle, 20; matrix size, 256x160 mm; FOV, 80 cm; voxel
643 NCC 392 (102) Table 3 SPM statistics showing differences in regional gray and white matter; a Montreal Neurological Institute coordinates of the voxel
of maximal statistical significance within each region; b Statistical significance set to p<.
Therefore the distribution of the orientation vectors of the voxels
should show peaks corresponding to the main shafts of each fibre.
Finally, the clustering methods [19-25] also have problems to identify patterns of activation and specific ROIs since they force voxels
to be grouped into separate functional clusters.
proposed to oversegment LH histogram using mean shift clustering and then group similar voxels
by using hierarchical clustering .
Figure 1 shows some of the system's participants: voxels
, metavoxels, a volume-primitive particle, a light, a camera, and the world.
A principal component model was generated from a dataset of 400 simulated 3D images with 100 x 100 x 50 voxels
To solve this problem, the Japanese researchers created plasma voxels
using femtosecond lasers that pulsed between 30-269 femtoseconds at a time.
This pattern is known as a voxel
mesh (volume and pixel).
do not need to be subdivided, which often results in large empty regions (Escobar, 2009).
Once activation maps have been produced, hemispheric dominance is assessed by either counting the active voxels
(volumetric pixels representing a value in 3-dimensional space) at a specified threshold in each hemisphere, or assessing BOLD signal changes in pre-defined anatomical regions.
The electric potentials are defined at the vertices of the voxels
, and the electric field is defined by set of discrete vectors on the voxel
edges; the magnitude of the electric field is defined at the voxel
centre by averaging the three sets of four parallel edge electric field components.