Multiple-energy operation with extended flattops at HIMAC

Iwata, Y.; Kadowaki, Takuya; Uchiyama, Hideki; Fujimoto, T.; Takada, E.; Shirai, Tomoyuki; Furukawa, Takuji; Mizushima, Kota; Takeshita, Eri; Katagiri, Ken; Sato, Shinji; Sano, Y.; Noda, K.

doi:10.1016/j.nima.2010.09.016

Cited by 78 publications

(43 citation statements)

References 7 publications

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“…The range shifter and energy changes can be adjusted in 3-and 30-mm range steps, respectively. In the present study, we set control times for the range shifter and synchrotron energy changes to 420 and 150 ms, respectively [12,13]. Hybrid scanning provides a superior lateral dose fall-oft and a higher relative biological effectiveness than can be obtained with the range shifter only because less range shifter material is needed [11].…”

Section: Methods and Materials Rescanning Methodsmentioning

confidence: 99%

Effects of a difference in respiratory cycle between treatment planning and irradiation for phase-controlled rescanning and carbon pencil beam scanning

Mori¹,

Inaniwa²,

Furukawa³

et al. 2013

BJR

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Section: Methods and Materials Rescanning Methodsmentioning

confidence: 99%

Effects of a difference in respiratory cycle between treatment planning and irradiation for phase-controlled rescanning and carbon pencil beam scanning

Mori¹,

Inaniwa²,

Furukawa³

et al. 2013

BJR

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“…A second challenge is a beam request according to the gating signal while the accelerator extracted pulse timing is not ready. To overcome this, the extended flattop operation was developed with a synchrotron‐based accelerator using a slow‐extraction method . A further problem is the fact that respiratory gating prolongs the treatment time: a 30% duty cycle results in a duty cycle that is approximately 70% shorter with gating than without it.…”

Section: Motion Mitigationmentioning

confidence: 99%

Motion management in particle therapy

Mori¹,

Knopf

Umegaki

2018

Medical Physics

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In this review article, we introduced the importance of “motion management” in advanced particle therapy. Several publications have reported that organ motion causes dose distribution disturbances due to interplay and blurring effects. Furthermore, motion can result in target dose miss and unwanted dose to healthy structures around the target. To avoid these problems, motion should be assessed and monitored prior and during treatment. In this review article, we give an overview about clinically available motion monitoring systems. Based on the acquired motion information an adequate motion mitigation technique should be chosen. This article reviews the clinical status of motion mitigation techniques like rescanning, gating and tracking. A limited number of centers have now started the treatment of targets in the thorax and abdomen using scanned particle beams. Therefore, the establishment of guidelines for motion monitoring and motion mitigation will be essential in the coming years.

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“…One study for a particular synchrotron has estimated that an average reduction in treatment time across all plans using MEE could be about 50% . MEE has now been implemented at several slow‐cycling synchrotron‐based facilities …”

Section: Current State: Beam Production Systemsmentioning

confidence: 99%

New horizons in particle therapy systems

Farr¹,

Flanz

Gerbershagen

et al. 2018

Medical Physics

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Particle therapy is rapidly expanding and claiming its position as the treatment modality of choice in teletherapy. However, the rate of expansion continues to be restricted by the size and cost of the associated particle therapy systems and their operation. Additional technical limitations such as dose delivery rate, treatment process efficiency, and achievement of superior dose conformity potentially hinder the complete fulfillment of the promise of particle therapy. These topics are explored in this review considering the current state of particle therapy systems and what improvements are required to overcome the current challenges. Beam production systems (accelerators), beam transport systems including gantries and beam delivery systems are addressed explicitly in these regards.

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Multiple-energy operation with extended flattops at HIMAC

Cited by 78 publications

References 7 publications

Effects of a difference in respiratory cycle between treatment planning and irradiation for phase-controlled rescanning and carbon pencil beam scanning

Effects of a difference in respiratory cycle between treatment planning and irradiation for phase-controlled rescanning and carbon pencil beam scanning

Motion management in particle therapy

New horizons in particle therapy systems

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