Particle therapy system
First Claim
1. A method of irradiating a charged particle beam comprising the steps of:
- delivering, out of a charged particle beam irradiation apparatus, a charged particle beam which is extracted from a charged particle beam generation apparatus and which arrives at a downstream side of a collimator provided to said charged particle beam irradiation apparatus without being blocked off by said collimatorintroducing a charged particle beam blocked off by said collimator into a plurality of metallic sheets arranged side by side in a direction of advance of the charged particle beam blocked off by said collimator; and
measuring energy of the charged particle beam blocked off by said collimator based on a position at which the metallic sheet having generated a maximum amount of electric charges is arranged.
0 Assignments
0 Petitions
Accused Products
Abstract
A particle therapy system capable of measuring energy of a charged particle beam even during irradiation of the charged particle beam is provided. A beam delivery (irradiation) system comprises a block collimator constituted by a pair of collimator members, and an energy detector mounted to one of the collimator members to be disposed on the upstream side thereof. When the pair of collimator members are moved in directions away from each other, a beam passage is formed between them. The energy detector constitutes an energy measuring device together with a signal processing unit. A part of the ion beam having reached the interior of the irradiation nozzle is irradiated to a patient through the beam passage. When a part of the remaining ion beam enters the energy detector, electric charges generate in the energy detector. The signal processing unit determines energy of the ion beam based on a position within the energy detector at which electric charges have generated in maximum amount.
186 Citations
6 Claims
-
1. A method of irradiating a charged particle beam comprising the steps of:
-
delivering, out of a charged particle beam irradiation apparatus, a charged particle beam which is extracted from a charged particle beam generation apparatus and which arrives at a downstream side of a collimator provided to said charged particle beam irradiation apparatus without being blocked off by said collimator introducing a charged particle beam blocked off by said collimator into a plurality of metallic sheets arranged side by side in a direction of advance of the charged particle beam blocked off by said collimator; and measuring energy of the charged particle beam blocked off by said collimator based on a position at which the metallic sheet having generated a maximum amount of electric charges is arranged. - View Dependent Claims (2, 3, 4, 5, 6)
-
Specification