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Figure 1 | Radiation Oncology

Figure 1

From: A 4D IMRT planning method using deformable image registration to improve normal tissue sparing with contemporary delivery techniques

Figure 1

The difference between (a) t4Dplan method and (b) traditional ITV method. The planning target volume (PTV) in the ITV method is the target volume used to plan and treat. In the t4Dplan method, the PTV50 plus the hot regions (HRs) are the target volume used to plan and treat. The cold regions (CRs) in the t4Dplan method represent the reduced treated volume relative to that in plans from the ITV method. CTV represents the clinical target volume; GTV represents gross tumor volume; IGTV represents internal gross tumor volume.

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Radiation Oncology

ISSN: 1748-717X

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