<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def data_ma(self):
 """ A 2D `~numpy.ma.MaskedArray` cutout image of the segment using the minimal bounding box. The mask is `True` for pixels outside of the source segment (i.e. neighboring segments within the rectangular cutout image are masked). """


        mask = (self._segment_img[self.slices] != self.label)
        return np.ma.masked_array(self._segment_img[self.slices], mask=mask)