Fig. 2
From: THUNDER 2: THeragnostic Utilities for Neoplastic DisEases of the Rectum by MRI guided radiotherapy
Example of dose escalation in accordance with the ERI index. Figure 2A shows the simulation plan according to the SIB 2 protocol. Figure 2B represents the dose escalation obtained at the tenth treatment fraction, where the red colourwash isodose line represents the V95% of the 60.1 Gy prescribed to PTV3. The orange colourwash isodose line represents the V95% of 55 Gy prescribed to PTV2, while the yellow colourwash isodose line represents the V95% of 45 Gy prescribed to PTV1