void reg_affine_positionField_gpu( mat44 *affineMatrix,
nifti_image *targetImage,
float4 **array_d)
{
int3 imageSize = make_int3(targetImage->nx,targetImage->ny,targetImage->nz);
CUDA_SAFE_CALL(cudaMemcpyToSymbol(c_ImageSize,&imageSize,sizeof(int3)));
CUDA_SAFE_CALL(cudaMemcpyToSymbol(c_VoxelNumber,&(targetImage->nvox),sizeof(int)));