ARRANGEMENT FOR EXPANDING THE PARTICLE ENERGY DISTRIBUTION OF A PARTICLE BEAM

• US 20100264327A1
• Filed: 04/07/2010
• Published: 10/21/2010
• Est. Priority Date: 04/15/2009
• Status: Abandoned Application

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Bönig, Marc-Oliver, Hein, Gerd
• Application Number:
  US12/755,742
• Publication Number:
  US 20100264327A1
• Time in Patent Office: Days
• US Class Current: 250/396.R
• CPC Class Codes: A61N 2005/1087 Ions; Protons
• CPC Class Codes: A61N 2005/1095 Elements inserted into the radiation path within the system, e.g. filters or wedges
• CPC Class Codes: G21K 1/10 Scattering devices; Absorbing devices; Ionising radiation filters

Abstract

An arrangement for expanding the particle energy distribution of a particle beam is provided. The arrangement includes at least two ripple filters, which are arranged in series such that one ripple filter is behind another ripple filter in a radiation direction.

Claims

1. An arrangement for expanding a particle energy distribution of a particle beam, the arrangement comprising at least first and second ripple filters, which are arranged in series such that the first ripple filter is behind the second ripple filter in a radiation direction.

2. The arrangement as claimed in claim 1, wherein the first and second ripple filters are rotated relative to one another.

3. The arrangement as claimed in claim 2, wherein the first and second ripple filters are rotated through 90°

relative to one other.

4. The arrangement as claimed in claim 1, wherein the first and second ripple filters are configured to expand the particle energy distribution of the particle beam 2 mm, 3 mm, or 2 mm and 3 mm.

5. The arrangement as claimed in claim 3, wherein the first ripple filter expands the particle energy distribution of the particle beam 2 mm, and the second ripple filter is connected downstream of the first ripple filter and expands the particle energy distribution of the particle beam 3 mm.

6. The arrangement as claimed in claim 2, wherein the first and second ripple filters are arranged such that the first ripple filter is behind the second ripple filter at a maximum spacing of about 1 m apart.

7. The arrangement as claimed in claim 1, wherein the first and second ripple filters are plates having a periodic structure consisting of fine grooves.

8. The arrangement as claimed in claim 1, wherein the first and second ripple filters are made of polymethylmethacrylate.

11. The arrangement as claimed in claim 2, wherein the first and second ripple filters are configured to expand the particle energy distribution of the particle beam 2 mm, 3 mm, or 2 mm and 3 mm.

12. The arrangement as claimed in claim 4, wherein the first and second ripple filters are arranged such that the first ripple filter is behind the second ripple filter at a maximum spacing of about 1 m apart.

13. The arrangement as claimed in claim 5, wherein the first and second ripple filters are arranged such that the first ripple filter is behind the second ripple filter at a maximum spacing of about 1 m apart.

14. The arrangement as claimed in claim 2, wherein the first and second ripple filters are plates having a periodic structure consisting of fine grooves.

15. The arrangement as claimed in claim 3, wherein the first and second ripple filters are plates having a periodic structure consisting of fine grooves.

16. The arrangement as claimed in claim 4, wherein the first and second ripple filters are plates having a periodic structure consisting of fine grooves.

17. The arrangement as claimed in claim 6, wherein the first and second ripple filters are plates having a periodic structure consisting of fine grooves.

18. The arrangement as claimed in claim 2, wherein the first and second ripple filters are made of polymethylmethacrylate.

9. A particle therapy system comprising:

an arrangement for expanding a particle energy distribution of a particle beam, the arrangement comprising two ripple filters, which are arranged in series such that one ripple filter is behind another ripple filter in a radiation direction.

19. The particle therapy system as claimed in claim 9, wherein the two ripple filters are rotated relative to one another.

20. The particle therapy system as claimed in claim 9, wherein the two ripple filters are plates having a periodic structure consisting of fine grooves.

10. A method for expanding the particle energy distribution of a particle beam, wherein two ripple filters are connected in series such that a first ripple filter is behind a second ripple filter in a radiation direction.