Fig. 2
From: Development and validation of an automated Tomotherapy planning method for cervical cancer
Examples of the auxiliary structure creation. Left: The green area represented the rectum, and the blue area represented the PTV. Right: The red area represented rectum-ptv, the brown area represented PTV_new, and the remaining green part represented rectum_new. Equations: rectum − rectum_new = rectum-ptv; PTV − (rectum-ptv) = PTV_new. Note: rectum_new represented the volume of intersection between the rectum and the PTV after it has been contracted inward