Particle therapy apparatus and method for modulating a particle beam generated in an accelerator
First Claim
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1. A particle therapy apparatus, comprising:
- an accelerator that generates a particle beam;
a passive energy modulator that performs a passive energy modulation of the particle beam; and
a control unit that switches between an active adjustment of energy in the accelerator and the passive energy modulation for changing energy of the particle beam between a high energy level and a low energy level step-by-step,wherein the control unit switches between the active adjustment of the energy and the passive energy modulation iteratively in an alternating sequence.
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Abstract
The invention relates to a particle therapy apparatus having an accelerator for generating a particle beam, a passive energy modulator comprising an absorber element, and a control entity. The control entity is designed to switch between an active adjustment of the energy in the accelerator and a passive energy modulation by the energy modulator, for the purpose of changing the energy of the particle beam from a high energy level to a low energy level in a step-by-step manner. In particular, this has the effect of shortening the dead times when changing between the energy levels.
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18 Claims
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1. A particle therapy apparatus, comprising:
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an accelerator that generates a particle beam; a passive energy modulator that performs a passive energy modulation of the particle beam; and a control unit that switches between an active adjustment of energy in the accelerator and the passive energy modulation for changing energy of the particle beam between a high energy level and a low energy level step-by-step, wherein the control unit switches between the active adjustment of the energy and the passive energy modulation iteratively in an alternating sequence. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for modulating a particle beam, comprising:
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generating the particle beam in an accelerator; and changing energy of the particle beam between a high energy level and a low energy level step-by-step by an active adjustment of energy in the accelerator and a passive energy modulation in a beam path of the particle beam, wherein the active adjustment of the energy and the passive energy modulation are applied iteratively in an alternating sequence. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification