.. index:: Parameters; 2D Uniformity ICRU 72

2D Uniformity ICRU 72
=====================

Returns the maximum difference between the max and the min of the :ref:`In Field Area` normalised to the average of the IFA according to ICRU 72 eq 3.2.

.. math:: {(max-min)} \cdot \cfrac {100} {ave}

Where *max* and *min* are the IFA maximum and minimum respectively and *ave* is the average value of the IFA.

**Protocol invocation name**: 2D Uniformity ICRU 72

|Note| The *max* and *min* may be affected by the set window levels.

.. |Note| image:: _static/Note.png