cout << " equilinear Equilinear divergent scan beams\n";
cout << " equiangular Equiangular divergent scan beams\n";
cout << " --focal-length Focal length ratio (ratio to radius of phantom)\n";
cout << " equilinear Equilinear divergent scan beams\n";
cout << " equiangular Equiangular divergent scan beams\n";
cout << " --focal-length Focal length ratio (ratio to radius of phantom)\n";