# Bas W. Raaymakers

Source: https://onco.cc/people/bas-raaymakers/  
OnCo record `bas-raaymakers` (Person). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

Physicist who invented the MR-linac, letting radiotherapy see and adapt to the tumour in real time.

## Summary

Bas Raaymakers conceived and led the development of the integrated MRI and linear accelerator at UMC Utrecht in collaboration with Elekta and Philips, treating the first patients on a high-field MR-linac in 2017 and enabling daily adaptive radiotherapy with soft-tissue visibility. He leads the MR-Linac Consortium's physics programme and works on real-time tumour tracking.

## Fields

- Kind: Person
- Last checked: 2026-09-10
- Tags: radiotherapy; mr-linac; physics
- Role: Professor of Experimental Clinical Physics, UMC Utrecht
- Specialisms: MR-guided radiotherapy; MR-linac development; Medical physics; Adaptive radiotherapy

## Sources

- PubMed: https://pubmed.ncbi.nlm.nih.gov/?term=Raaymakers%20BW%5BAuthor%5D%20MR-linac

## Connected records

- technologies: [IMRT / IGRT (modern external beam)](https://onco.cc/technologies/imrt-igrt/), [MR-guided adaptive radiotherapy](https://onco.cc/technologies/mr-linac/)
- institutions: [UMC Utrecht Cancer Center](https://onco.cc/institutions/umc-utrecht/)

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JSON: https://onco.cc/api/v1/entities/bas-raaymakers.json