Cyclotrons2019 - List of Keywords (power-supply)

Paper	Title	Other Keywords	Page
TUB04	On-Line Dynamic Beam Intensity Control in a Proton Therapy Cyclotron	controls, cyclotron, proton, operation	148
	S. Psoroulas, P. Fernandez Carmona, D. Meer, D.C. Weber PSI, Villigen PSI, Switzerland D.C. Weber KRO, Bern, Switzerland D.C. Weber University of Zurich, University Hospital, Zurich, Switzerland
	Modern proton therapy facilities use the pencil beam scanning (PBS) technique for the treatment of tumours: the beam is scanned through the tumour volume sequentially, i.e. stopping the beam at each position in the tumour for the amount of time necessary to deliver the prescribed dose for that position, and then moving to the next position (dose-driven delivery). This technique is robust against fluctuations in the beam current. Modern cyclotrons however offer very stable beam currents, and allow regulating the beam intensity online to match the requested beam intensity profile as a function of time (’time-driven’ delivery). To realise time-driven delivery at the COMET cyclotron at PSI, we have designed a beam intensity controller* which is able to partially compensate for the non-linearity and the delay introduced by the physical limitations of the beam line elements and its drivers; this is particularly important when trying to achieve a very fast modulation of the beam, as required by the clinical plans. Experimental results have shown good performance for most current clinical scenarios, though we are investigating more advanced solutions for higher dose rates scenarios. () Klimpki, G., et al. (2018). PMB, 63(14), 145006 (*) Fernandez Carmona, P., et al., (2018) Proceedings of PCaPAC2018, FRCC2
	Slides TUB04 [10.992 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUB04
About •	paper received ※ 14 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Other Keywords

Page

TUB04

On-Line Dynamic Beam Intensity Control in a Proton Therapy Cyclotron

controls, cyclotron, proton, operation

148

S. Psoroulas, P. Fernandez Carmona, D. Meer, D.C. Weber
PSI, Villigen PSI, Switzerland
D.C. Weber
KRO, Bern, Switzerland
D.C. Weber
University of Zurich, University Hospital, Zurich, Switzerland

Modern proton therapy facilities use the pencil beam scanning (PBS) technique for the treatment of tumours: the beam is scanned through the tumour volume sequentially, i.e. stopping the beam at each position in the tumour for the amount of time necessary to deliver the prescribed dose for that position, and then moving to the next position (dose-driven delivery). This technique is robust against fluctuations in the beam current. Modern cyclotrons however offer very stable beam currents, and allow regulating the beam intensity online to match the requested beam intensity profile as a function of time (’time-driven’ delivery). To realise time-driven delivery at the COMET cyclotron at PSI*, we have designed a beam intensity controller** which is able to partially compensate for the non-linearity and the delay introduced by the physical limitations of the beam line elements and its drivers; this is particularly important when trying to achieve a very fast modulation of the beam, as required by the clinical plans. Experimental results have shown good performance for most current clinical scenarios, though we are investigating more advanced solutions for higher dose rates scenarios.
(*) Klimpki, G., et al. (2018). PMB, 63(14), 145006
(**) Fernandez Carmona, P., et al., (2018) Proceedings of PCaPAC2018, FRCC2

Slides TUB04 [10.992 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-Cyclotrons2019-TUB04

About •

paper received ※ 14 September 2019 paper accepted ※ 26 September 2019 issue date ※ 20 June 2020

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)