.. index:: Protocol; Siemens

Siemens
=======

**Photon Profile Parameters**

The defined photon parameters are:

.. toctree::
   :maxdepth: 1

*  :ref:`Field Centre<1D Field Centre 50>`
*  :ref:`Field Size<1D Field Size 50>`
*  :ref:`Penumbra 80%-20% Left<1D Penumbra 8020 Left>`
*  :ref:`Penumbra 80%-20% Right<1D Penumbra 8020 Right>`
*  :ref:`Area Symmetry<1D Symmetry Area>`
*  :ref:`Dose Difference<1D Flatness Diff>`
*  :ref:`MAX/CAX<1D Deviation Ratio>`

**Electron Profile Parameters**

The electron parameters are the same as the photon parameters

**Flattened field**

The flattend field is defined by the :ref:`In Field Area`.