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. Author manuscript; available in PMC: 2013 Apr 1.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2011 Aug 23;82(5):1783–1790. doi: 10.1016/j.ijrobp.2011.03.053

Fig. 1.

Fig. 1

The two definitions of the chest wall (CW) as an organ at risk. CW3cm (green) was a 3-cm two-dimensional expansion of the ipsilateral lung excluding the lung volume, the mediastinal soft tissue, and anterior vertebral body. The CW contour was extended 1.2 cm above and below the planning target volume. CW2cm (red) was defined as CW3cm, except the lung was expanded 2 cm. An example of the CW2cm and CW3cm structures is shown.