ESTRO ACROP consensus guideline on CT- and MRI-based target volume delineation for primary radiation therapy of localized prostate cancer

Carl Salembier, Geert Villeirs, Berardino De Bari, Peter Hoskin, Bradley R Pieters, Marco Van Vulpen, Vincent Khoo, Ann Henry, Alberto Bossi, Gert De Meerleer, Valérie Fonteyne

Research output: Contribution to journalArticlepeer-review


BACKGROUND AND PURPOSE: Delineation of clinical target volumes (CTVs) remains a weak link in radiation therapy (RT), and large inter-observer variation is seen. Guidelines for target and organs at risk delineation for prostate cancer in the primary setting are scarce. The aim was to develop a delineation guideline obtained by consensus between a broad European group of radiation oncologists.

MATERIAL AND METHODS: An ESTRO contouring consensus panel consisting of leading radiation oncologists and one radiologist with known subspecialty expertise in prostate cancer was asked to delineate the prostate, seminal vesicles and rectum on co-registered CT and MRI scans. After evaluation of the different contours, literature review and multiple informal discussions by electronic mail a CTV definition was defined and a guide for contouring the CTV of the prostate and the rectum was developed.

RESULTS: The panel achieved consensus CTV contouring definitions to be used as guideline for primary RT of localized prostate cancer.

CONCLUSION: The ESTRO consensus on CT/MRI based CTV delineation for primary RT of localized prostate cancer, endorsed by a broad base of the radiation oncology community, is presented to improve consistency and reliability.

Original languageEnglish
Pages (from-to)49-61
Number of pages13
JournalRadiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology
Issue number1
Publication statusPublished - Apr 2018


  • Consensus
  • Humans
  • Magnetic Resonance Imaging/methods
  • Male
  • Observer Variation
  • Organs at Risk/diagnostic imaging
  • Prostatic Neoplasms/diagnostic imaging
  • Radiotherapy Planning, Computer-Assisted/methods
  • Radiotherapy, Image-Guided/methods
  • Rectum/diagnostic imaging
  • Reproducibility of Results
  • Seminal Vesicles/diagnostic imaging
  • Tomography, X-Ray Computed/methods

Research Beacons, Institutes and Platforms

  • Manchester Cancer Research Centre


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