Figure 3From: The application of PET-CT to post-mastectomy regional radiation therapy using a deformable image registrationDigitally reconstructed radiographs (DRR) image of each field. A: Anterior field. It is the historically designed field. B: Tangential fields. They also follow the historically designed fields. C: Modified anterior field. It is 1 cm larger below the junction compared to the historical field. D: Posterior axillary boost beam. Sky blue line represents the area received the dose below 90% of the prescribed dose.Back to article page