Skip to main content
. 2021 Nov 20;20:82–87. doi: 10.1016/j.phro.2021.11.002

Fig. 3.

Fig. 3

Two examples shown in the sagittal plane, illustrating exceptions; one or more of the strategies led to part of the bladder being outside the PTV in the simulated post-treatment image. Time of the image indicated in top right corner. a–d) Example 1. Planning CT (a) and T1 weighted images (b–d). The selected LoP PTV (yellow) was sufficient in MRI1, but missed a part (29 cm3) of the bladder in MRI2 (indicated by the yellow arrow in c). (e–h) Example 2. Planning CT (a) and T2 weighted images (f–h). The PTVs of all three strategies missed a part of the bladder in the simulated post-treatment MRI. For LoP and MRgRT15min: 17 cm3 and 28 cm3 of the Bladder2 was outside the PTV respectively (indicated by the yellow arrow in g). For the MRgRT30min workflow: 100 cm3 of the Bladder3 was outside the PTV (indicated by the yellow arrow in h).