// itkSetMacro(IsoCenter, OutputPointType);
// itkGetConstReferenceMacro(IsoCenter, OutputPointType)
// itkSetMacro( SourceToScreen, double );
// itkSetMacro(IsoCenter, OutputPointType);
// itkGetConstReferenceMacro(IsoCenter, OutputPointType)
// itkSetMacro( SourceToScreen, double );