@pimms.value<EOL><INDENT>def lh_vertex_to_voxel_lines_interpolation(lh_gray_indices, lh, image_dimensions,<EOL>vertex_to_voxel_matrix):<DEDENT>
return _vertex_to_voxel_lines_interpolation(lh, lh_gray_indices, image_dimensions,<EOL>vertex_to_voxel_matrix)<EOL>
sub.lh_gray_vertex_to_voxel_lines_interpolation is a scipy sparse matrix representing the
  interpolation from the vertices into the voxels; the ordering of the voxels that is
  produced by the dot-product of this matrix with the vector of vertex-values is the same
  as the ordering used in sub.lh_gray_indices.
The method works by projecting the vectors from the white surface vertices to the pial
surface vertices into the the ribbon and weighting them by the fraction of the vector that
lies in the voxel.