1. Figure 2 Variations between planned and delivered doses of radiation
Figure 2 | Variations between planned and delivered doses of radiation. a | Beam's eye view on a DRR, and b | axial image demonstrating a planned tangential radiation beam avoiding the outlined heart, with resultant isodose distributions largely non-overlapping with the heart. c | Portal film obtained during treatment demonstrating a 'deeper' set-up than planned, with a portion of the heart in the beam's path, and d | this altered position displayed on the axial image. Isodose distributions overlap with the heart in this scenario, resulting in unwanted and potentially harmful exposure of the heart to radiation. DRR, digitally reconstructed radiograph.
Zagar, T. M. et al. (2015) Breast cancer therapy-associated cardiovascular disease
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