@pimms.value<EOL><INDENT>def rh_white_indices(rh_white_mask):<DEDENT>
if rh_white_mask is None: return None<EOL>if is_image(rh_white_mask): rh_white_mask = rh_white_mask.get_data()<EOL>idcs = np.transpose(np.where(rh_white_mask))<EOL>return frozenset([tuple(row) for row in idcs])<EOL>
sub.rh_white_indices is a frozenset of the indices of the white voxels in the given
subject's rh, represented as 3-tuples.