def dcm_collimator_1(scale=nil, axis)
      coeff = 1
      if scale == :elekta
        axis = (axis == :x ? :y : :x)
        coeff = -1
      elsif scale == :varian
        coeff = -1
      end
      dcm_collimator(axis, coeff, side=1)
    end
def dcm_collimator_1(scale=nil, axis)
      coeff = 1
      if scale == :elekta
        axis = (axis == :x ? :y : :x)
        coeff = -1
      elsif scale == :varian
        coeff = -1
      end
      dcm_collimator(axis, coeff, side=1)
    end
Converts the collimator1 attribute to proper DICOM format.

 @param [Symbol] scale if set, relevant device parameters are converted from a native readout format to IEC1217 (supported values are :elekta & :varian)
 @return [Float] the DICOM-formatted collimator_x1 attribute