Gross tumour volume delineation in anal cancer on T2-weighted and diffusion-weighted MRI - reproducibility between radiologists and radiation oncologists and impact of reader experience level and DWI image quality.

CONCLUSION: Overall interobserver agreement for anal cancer GTV delineation on MRI is good for both radiologists and radiation oncologists, regardless of experience level. Use of DWI did not improve agreement. DWI artefacts affecting GTV delineation occurred in almost half of the patients, which may severely limit the use of DWI for radiotherapy planning if no steps are undertaken to avoid them.
PMID: 32540336 [PubMed - as supplied by publisher]

Source: Radiotherapy and Oncology : journal of the European Society for Therapeutic Radiology and Oncology - June 11, 2020 Category: Radiology Authors: Min LA, Vacher YJL, Dewit L, Donker M, Sofia C, van Triest B, Bos P, van Griethuysen JJW, Maas M, Beets-Tan RGH, Lambregts DMJ Tags: Radiother Oncol Source Type: research