MRI commissioning of 1.5T MR-linac systems – a multi-institutional study
| Autor: | Brige Chugh, Uulke A. van der Heide, Jihong Wang, Eric S. Paulson, M Glitzner, Rob H N Tijssen, Marielle E.P. Philippens, Andreas Wetscherek, Michael Dubec |
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| Rok vydání: | 2019 |
| Předmět: |
MR-IGRT
Project commissioning Computer science Radiotherapy image guided Practical guideline 030218 nuclear medicine & medical imaging 03 medical and health sciences 0302 clinical medicine Humans Radiology Nuclear Medicine and imaging Mr linac business.industry Field homogeneity Image-guided Quality control Shim (magnetism) Hematology Magnetic Resonance Imaging Quality assurance Reliability engineering Acceptance Oncology Radiology Nuclear Medicine and imaging 030220 oncology & carcinogenesis High precision radiotherapy Particle Accelerators business Radiotherapy Image-Guided MRI |
| Zdroj: | Radiotherapy and Oncology, 132, 114. Elsevier Ireland Ltd Tijssen, R H N, Philippens, M E P, Paulson, E S, Glitzner, M, Chugh, B, Wetscherek, A, Dubec, M, Wang, J & van der Heide, U A 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 |
| ISSN: | 0167-8140 |
| DOI: | 10.1016/j.radonc.2018.12.011 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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