Spine SRS

Table of Contents

Modulation Complexity Score (MCS)

The MCS is shown in the Treatment Delivery PDF under Objects and Constraints and gives a measure of the complexity of the treatment plan. It considers the positions of neighboring leaves and the deviation from the maximum aperture for each control point weighted by the irradiated dose. A value of 1.0 characterizes the simplest form, a uniform, rectangular aperture for each control point. Lower values indicate more complex shapes. For further information on how the MCS is calculated, refer to the following publications:

  1. A new metric for assessing IMRT modulation complexity and plan deliverability. McNiven AL, Sharpe MB, Purdie TG. Med Phys. 2010 Feb;37(2):505-15.
  2. Impact of plan parameters on the dosimetric accuracy of volumetric modulated arc therapy. Masi L, Doro R, Favuzza V, Cipressi S, Livi L. Med Phys. 2013 Jul;40(7):071718. doi: 10.1118/1.4810969.

Art-No. 60919-40EN

Date of publication: 2019-05-22