Paper |
Title |
Page |
WEPME010 |
Patient-specific Intensity-modulation of a Slowly Extracted Beam at the HIT Synchrotron |
2944 |
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- C. Schömers, E. Feldmeier, Th. Haberer, J. Naumann, R.E. Panse, A. Peters
HIT, Heidelberg, Germany
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Since 2009 more than 1100 tumour patients have been treated at the Heidelberg Ion Therapy-Centre (HIT). The HIT synchrotron produces a library of energy, focus and intensity-variable pencil beams used to deliver dose distributions of utmost conformity to irregularly shaped target volumes. The required number of particles for each volume element of the tumour, which can vary by more than two magnitudes, is applied using the rasterscan technology. The irradiation-time and thus the patient throughput are highly sensitive to the achieved spill-structure driven by RF-Knockout extraction. Presently unfavourable fluctuations of the extracted intensity due to inhomogeneous phase space distribution of the beam are present. Recently a feedback-loop coupling the dose-defining ionisation chamber in front of the patient with the RF-Exciter was implemented allowing for the adaptation of the extracted intensity to the patient-specific treatment plan in real-time. The technical implementation and the impact on the clinical operation will be discussed.
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THXB201 |
Novel Techniques and Challenges in Hadron Therapy |
3112 |
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- Th. Haberer, E. Feldmeier, M. Galonska, A. Peters, C. Schömers
HIT, Heidelberg, Germany
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This talk should review novel techniques and challenges for beam delivery systems with various beam scanning methods (such as 3D scanning, 4D scanning and so on) to conform the beam dose to the tumor shape in proton and carbon ion therapy, as developed by PSI, GSI, HIMAC, IMP etc. Besides traditional accelerators such as cyclotrons and synchrotrons, the talk should review the technical challenges and prospects for future compact hadron therapy accelerators such as DWA, laser accelerators and so on.
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Slides THXB201 [4.934 MB]
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