Convection triggers local MR signal loss during proton beam irradiation of liquid water phantoms
Convection triggers local MR signal loss during proton beam irradiation of liquid water phantoms
Peter, J.; Gantz, S.; Karsch, L.; Pawelke, J.; Hoffmann, A. L.
Abstract
MRI-based proton beam visualisation in water has proven feasible in exploratory irradiation experiments performed on a first research prototype in-beam MRI system. Beam-induced convection was hypothesised to be implicated into MR signal loss observed within the beam volume. In this study, this hypothesis was tested in liquid water-filled phantoms by suppression of convection-induced motion using mechanical barriers and temperature control of water expansivity. In absence of convection-induced motion, no beam-induced signal changes occurred, supporting the hypothesis that convection triggers local MR signal loss during proton beam irradiation. The elucidation of the exact mechanism of convection-induced signal loss requires further investigation.
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Beitrag zu Proceedings
Joint Annual Meeting ISMRM-ESMRMB 2022, 07.-12.05.2022, London/online, United Kingdom
Proceedings of the joint annual meeting ISMRM-ESMRMB 2022 & ISMRT Annual Meeting -
Poster
Joint Annual Meeting ISMRM-ESMRMB & ISMRT 31st Annual Meeting, 07.-12.05.2022, London, Vereinigtes Königreich
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