ESTRO Brachytherapy for Prostate Cancer 2018

mpMRI-derived GTV measurements of DIPLs derived from T2W, DW-MRI and DCE sequences are reproducible

- GTV is largest on T2W images

- GTV is smallest on DCE-MRI images

- T2W GTVs best approximate to in vivo tumour volume.

Therefore, GTV should be delineated on T2W images when defining the DIPL