ROIDraw with dicom file gives error

Reference to non-existent field 'PixelSpacing'.

Error in ROIDraw>preview_Callback (line 432) spacing = handles.info.PixelSpacing;

Error in gui_mainfcn (line 96) feval(varargin{:});

Error in ROIDraw (line 43) gui_mainfcn(gui_State, varargin{:});

Error while evaluating uicontrol Callback