ENH: Add units/raise_unknown to MINC/ECAT get_zooms

Author: effigies

nibabel/ecat.py

@@ -578,7 +578,7 @@ def get_frame_affine(self, frame=0):
                                                               z_off])
         return aff
 
-    def get_zooms(self, frame=0):
+    def get_zooms(self, frame=0, units='norm', raise_unknown=False):
         """returns zooms  ...pixdims"""
         subhdr = self.subheaders[frame]
         x_zoom = subhdr['x_pixel_size'] * 10

nibabel/minc1.py

@@ -90,7 +90,7 @@ def get_data_dtype(self):
     def get_data_shape(self):
         return self._image.data.shape
 
-    def get_zooms(self):
+    def get_zooms(self, units='norm', raise_unknown=False):
         """ Get real-world sizes of voxels """
         # zooms must be positive; but steps in MINC can be negative
         return tuple([abs(float(dim.step)) if hasattr(dim, 'step') else 1.0