:py:mod:`pytomography.transforms.SPECT.cutoff`
==============================================

.. py:module:: pytomography.transforms.SPECT.cutoff


Module Contents
---------------

Classes
~~~~~~~

.. autoapisummary::

   pytomography.transforms.SPECT.cutoff.CutOffTransform




.. py:class:: CutOffTransform(mask)


   Bases: :py:obj:`pytomography.transforms.Transform`

   The parent class for all transforms used in reconstruction (obj2obj, im2im, obj2im). Subclasses must implement the ``__call__`` method.

   :param device: Pytorch device used for computation
   :type device: str

   .. py:method:: forward(proj, padded = True)

      Cuts off the projection data outside of a certain region.
      :param proj: Projection data
      :type proj: torch.Tensor
      :param padded: Whether or not the projection data is padded. Defaults to True.
      :type padded: bool, optional

      :returns: Projection data with cutoff applied
      :rtype: torch.Tensor


   .. py:method:: backward(proj, padded = True)

      Returns the projection data without the cutoff.
      :param proj: Projection data
      :type proj: torch.Tensor
      :param padded: Whether or not the projection data is padded. Defaults to True.
      :type padded: bool, optional

      :returns: Projection data without cutoff
      :rtype: torch.Tensor