MRI commissioning of 1.5T MR-linac systems – a multi-institutional study

Rob H.N. Tijssen, Marielle E.P. Philippens, Eric S. Paulson, Markus Glitzner, Brige Chugh, Andreas Wetscherek, Michael Dubec, Jihong Wang, Uulke A. van der Heide

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Background: Magnetic Resonance linear accelerator (MR-linac) systems represent a new type of technology that allows for online MR-guidance for high precision radiotherapy (RT). Currently, the first MR-linac installations are being introduced clinically. Since the imaging performance of these integrated MR-linac systems is critical for their application, a thorough commissioning of the MRI performance is essential. However, guidelines on the commissioning of MR-guided RT systems are not yet defined and data on the performance of MR-linacs are not yet available. Materials & methods: Here we describe a comprehensive commissioning protocol, which contains standard MRI performance measurements as well as dedicated hybrid tests that specifically assess the interactions between the Linac and the MRI system. The commissioning results of four MR-linac systems are presented in a multi-center study. Results: Although the four systems showed similar performance in all the standard MRI performance tests, some differences were observed relating to the hybrid character of the systems. Field homogeneity measurements identified differences in the gantry shim configuration, which was later confirmed by the vendor. Conclusion: Our results highlight the importance of dedicated hybrid commissioning tests and the ability to compare the machines between institutes at this very early stage of clinical introduction. Until formal guidelines and tolerances are defined the tests described in this study may be used as a practical guideline. Moreover, the multi-center results provide initial bench mark data for future MR-linac installations.

Original languageEnglish (US)
Pages (from-to)114-120
Number of pages7
JournalRadiotherapy and Oncology
Volume132
DOIs
StatePublished - Mar 2019

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Multi-Institutional Systems
Particle Accelerators
Magnetic Resonance Spectroscopy
Guidelines
Radiotherapy
Technology

Keywords

  • Acceptance
  • Image-guided
  • MR-IGRT
  • MRI
  • Quality assurance
  • Quality control

ASJC Scopus subject areas

  • Hematology
  • Oncology
  • Radiology Nuclear Medicine and imaging

Cite this

Tijssen, R. H. N., Philippens, M. E. P., Paulson, E. S., Glitzner, M., Chugh, B., Wetscherek, A., ... van der Heide, U. A. (2019). MRI commissioning of 1.5T MR-linac systems – a multi-institutional study. Radiotherapy and Oncology, 132, 114-120. https://doi.org/10.1016/j.radonc.2018.12.011

MRI commissioning of 1.5T MR-linac systems – a multi-institutional study. / Tijssen, Rob H.N.; Philippens, Marielle E.P.; Paulson, Eric S.; Glitzner, Markus; Chugh, Brige; Wetscherek, Andreas; Dubec, Michael; Wang, Jihong; van der Heide, Uulke A.

In: Radiotherapy and Oncology, Vol. 132, 03.2019, p. 114-120.

Research output: Contribution to journalArticle

Tijssen, RHN, Philippens, MEP, Paulson, ES, Glitzner, M, Chugh, B, Wetscherek, A, Dubec, M, Wang, J & van der Heide, UA 2019, 'MRI commissioning of 1.5T MR-linac systems – a multi-institutional study', Radiotherapy and Oncology, vol. 132, pp. 114-120. https://doi.org/10.1016/j.radonc.2018.12.011
Tijssen RHN, Philippens MEP, Paulson ES, Glitzner M, Chugh B, Wetscherek A et al. MRI commissioning of 1.5T MR-linac systems – a multi-institutional study. Radiotherapy and Oncology. 2019 Mar;132:114-120. https://doi.org/10.1016/j.radonc.2018.12.011
Tijssen, Rob H.N. ; Philippens, Marielle E.P. ; Paulson, Eric S. ; Glitzner, Markus ; Chugh, Brige ; Wetscherek, Andreas ; Dubec, Michael ; Wang, Jihong ; van der Heide, Uulke A. / MRI commissioning of 1.5T MR-linac systems – a multi-institutional study. In: Radiotherapy and Oncology. 2019 ; Vol. 132. pp. 114-120.
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