diff --git a/matRad/util/matRad_plotSlice.m b/matRad/util/matRad_plotSlice.m
index a704d88dd..676636c73 100644
--- a/matRad/util/matRad_plotSlice.m
+++ b/matRad/util/matRad_plotSlice.m
@@ -1,4 +1,4 @@
-function [] = matRad_plotSlice(ct, varargin)
+function [hCMap,hDose,hCt,hContour,hIsoDose] = matRad_plotSlice(ct, varargin)
 % matRad tool function to directly plot a complete slice of a ct with dose
 % optionally including contours and isolines
 %
@@ -68,14 +68,14 @@
 isCubeIdx           = @(x) isscalar(x);
 isPlane             = @(x) isscalar(x) && (sum(x==[1, 2, 3])==1);
 isDoseWindow        = @(x) (length(x) == 2 && isvector(x));
-isThresh            = @(x) isscalar(x) && (x>=0) && (x<=1);
-isAlpha             = @(x) isscalar(x) && (x>=0) && (x<=1);
+isThresh            = @(x) (isscalar(x) && (x>=0) && (x<=1)) || isempty(x);
+isAlpha             = @(x) isscalar(x) && (x>=0) && (x<=1) || isempty(x);
 isDoseColorMap      = @(x) isnumeric(x) && (size(x, 2)==3) &&  all(x(:) >= 0) && all(x(:) <= 1);
-isDoseIsoLevels     = @(x) isnumeric(x) && isvector(x);
-isVOIselection      = @(x) all(x(:)==1 | x(:)==0);
+isDoseIsoLevels     = @(x) isnumeric(x) && isvector(x)|| isempty(x);
+isVOIselection      = @(x) isnumeric(x) || isempty(x); %all(x(:)==1 | x(:)==0) || isempty(x);
 isContourColorMap   = @(x) isnumeric(x) && (size(x, 2)==3) && size(x, 1)>=2 && all(x(:) >= 0) && all(x(:) <= 1);
 isBoolPlotLegend    = @(x) x==0 || x ==1;
-isColorBarLabel     = @(x) isstring(x) || ischar(x);
+isColorBarLabel     = @(x) isstring(x) || ischar(x) || isempty(x);
 isShowCt            = @(x) isscalar(x) && (x==0) || (x==1);
 
 p = inputParser;
diff --git a/matRad/util/matRad_plotSliceWrapper.m b/matRad/util/matRad_plotSliceWrapper.m
index bcc7d9436..f56d2bac6 100644
--- a/matRad/util/matRad_plotSliceWrapper.m
+++ b/matRad/util/matRad_plotSliceWrapper.m
@@ -63,6 +63,8 @@
 %
 % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
+warning('Deprecation warning: matRad_plotSliceWrapper is deprecated. Using matRad_plot_Slice instead');
+
 % Handle the argument list
 if ~exist('thresh','var') || isempty(thresh)
     thresh = [];
@@ -101,6 +103,11 @@
 
 matRad_cfg = MatRad_Config.instance();
 
+warning('Deprecation warning: matRad_plotSliceWrapper is deprecated. Using matRad_plot_Slice instead');
+
+[hCMap,hDose,hCt,hContour,hIsoDose] = matRad_plotSlice(ct, 'axesHandle', axesHandle, 'cst', cst, 'cubeIdx', cubeIdx, 'dose', dose, 'plane', plane, 'slice', slice,'thresh', thresh, 'alpha', alpha, 'contourColorMap', contourColorMap, 'doseColorMap', doseColorMap, 'doseWindow', doseWindow, 'doseIsoLevels', doseIsoLevels, 'voiSelection', voiSelection, 'colorBarLabel', colorBarLabel, 'boolPlotLegend', boolPlotLegend, 'others', varargin);
+
+%{
 set(axesHandle,'YDir','Reverse');
 % plot ct slice
 hCt = matRad_plotCtSlice(axesHandle,ct.cubeHU,cubeIdx,plane,slice); 
@@ -171,6 +178,6 @@
 if ~isempty(colorBarLabel)
     set(get(hCMap,'YLabel'),'String', colorBarLabel,'FontSize',matRad_cfg.gui.fontSize);
 end
-
+%}
 end