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Subkey                       Description                                                                                                                                                                                                                                                   
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CheckSpacing                 Determine whether to check the spacing or not. If True, and the spacing of the image is [1x1x1], we assume the spacing is incorrect, and overwrite it using the DICOM metadata.                                                                               
Clipping                     Determine whether to use intensity clipping in preprocessing of image or not.                                                                                                                                                                                 
Clipping_Range               Lower- and upperbound of intensities to be used in clipping.                                                                                                                                                                                                  
Normalize                    Determine whether to use normalization in preprocessing of image or not.                                                                                                                                                                                      
Normalize_ROI                If a mask is supplied and this is set to True, normalize image based on supplied ROI. Otherwise, the full image is used for normalization using the SimpleITK Normalize function. Lastly, setting this to False will result in no normalization being applied.
Method                       Method used for normalization if ROI is supplied. Currently, z-scoring or using the minimum and median of the ROI can be used.                                                                                                                                
ROIDetermine                 Choose whether a ROI for normalization is provided, or Otsu thresholding is used to determine one.                                                                                                                                                            
ROIdilate                    Determine whether the ROI has to be dilated with a disc element or not.                                                                                                                                                                                       
ROIdilateradius              Radius of disc element to be used in ROI dilation.                                                                                                                                                                                                            
Resampling                   Determine whether the image and mask will be resampled or not.                                                                                                                                                                                                
Resampling_spacing           Spacing to resample image and mask to, if resampling is used.                                                                                                                                                                                                 
BiasCorrection               Determine whether N4 Bias correction will be applied or not.                                                                                                                                                                                                  
BiasCorrection_Mask          Whether withing bias correction, a mask generated through Otsu thresholding is used or not.                                                                                                                                                                   
CheckOrientation             Determine whether to check the image orientation or not. If checked, if the orientation is not equal to the OrientationPrimaryAxis, the image is rotated.                                                                                                     
OrientationPrimaryAxis       If CheckOrientation is True, if primary axis is not this one, rotate image such that it is. Currently, only "axial" is supported.                                                                                                                             
HistogramEqualization        Determine whether to use histogram equalization or not.                                                                                                                                                                                                       
HistogramEqualization_Alpha  Controls how much the filter acts like the classical histogram equalization method, see https://simpleitk.org/doxygen/latest/html/classitk_1_1simple_1_1AdaptiveHistogramEqualizationImageFilter.html                                                         
HistogramEqualization_Beta   Controls how much the filters acts like an unsharp mask, see https://simpleitk.org/doxygen/latest/html/classitk_1_1simple_1_1AdaptiveHistogramEqualizationImageFilter.html                                                                                    
HistogramEqualization_Radius Controls the windows size, see https://simpleitk.org/doxygen/latest/html/classitk_1_1simple_1_1AdaptiveHistogramEqualizationImageFilter.html                                                                                                                  
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