mpiWorld.getComm().Bcast (&opt_rotangle, 1, MPI::DOUBLE, 0);
mpiWorld.getComm().Bcast (&opt_nview, 1, MPI::INT, 0);
mpiWorld.getComm().Bcast (&opt_ndet, 1, MPI::INT, 0);
mpiWorld.getComm().Bcast (&opt_nray, 1, MPI::INT, 0);
mpiWorld.getComm().Bcast (&opt_rotangle, 1, MPI::DOUBLE, 0);
mpiWorld.getComm().Bcast (&opt_nview, 1, MPI::INT, 0);
mpiWorld.getComm().Bcast (&opt_ndet, 1, MPI::INT, 0);
mpiWorld.getComm().Bcast (&opt_nray, 1, MPI::INT, 0);