geodesicActiveContour->SetNumberOfIterations( it );
smoothing->SetInput( filter2->GetOutput() );
gradientMagnitude->SetInput( smoothing->GetOutput() );
sigmoid->SetInput( gradientMagnitude->GetOutput() );
fastMarching->SetInput( sigmoid->GetOutput() );
geodesicActiveContour->SetNumberOfIterations( it );
smoothing->SetInput( filter2->GetOutput() );
gradientMagnitude->SetInput( smoothing->GetOutput() );
sigmoid->SetInput( gradientMagnitude->GetOutput() );
fastMarching->SetInput( sigmoid->GetOutput() );