Control device for controlling an irradiation procedure, particle therapy unit, and method for irradiating a target volume
The present embodiments relate to a control device for controlling an irradiation procedure, which is designed in such a way that a target volume is irradiated by at least two irradiation procedures. In each irradiation procedure, an energy of a particle beam is varied in such a way that the target volume is irradiated layer-wise in layers that are spatially arranged one behind another. A sequence in which the layers of the target volume are irradiated in one of the irradiation procedures is varied from irradiation procedure to irradiation procedure, in terms of a direction of incidence of the particle beam.
1. A control device for controlling an irradiation procedure in a particle therapy unit, the control device being configured to control at least two irradiation procedures of a target volume, the control device comprising:
an energy variation controller configured to vary an energy of a particle beam in the at least two irradiation procedures in such a way that the target volume is irradiated layer-wise in layers that are spatially arranged one behind another,
a sequence variation controller configured to vary a sequence, in which the layers of the target volume are irradiated in one of the at least two irradiation procedures, from a first of the at least two irradiation procedures to a second of the at least two irradiation procedures, in a direction of incidence of the particle beam, and
an irradiation procedure controller configured to control the at least two irradiation procedures such that a sequence of layers that are irradiated in the first of the at least two irradiation procedures runs in an alternate direction from a sequence of layers that are irradiated in the second of the at least two irradiation procedures, with respect to the direction of incidence of the particle beam.
2. The control device as claimed in claim 1 , wherein the sequence, in which the layers are irradiated in one of the irradiation procedures, is changed from the first irradiation procedure to the second irradiation procedure in such a way that in a transition from the first irradiation procedure to the second irradiation procedure, an identical layer is irradiated or adjacent layers are irradiated.
3. The control device as claimed in claim 1 , wherein the same layers of the target volume are irradiated in the at least two irradiation procedures.
4. The control device as claimed in claim 1 , wherein different layers of the target volume are irradiated in the at least two irradiation procedures.
5. The control device as claimed in claim 1 , wherein the direction of incidence of the particle beam remains identical from the first irradiation procedure to the second irradiation procedure in the at least two irradiation procedures.
6. The control device as claimed in claim 1 , wherein the direction of incidence of the particle beam is varied from the first irradiation procedure to the second irradiation procedure in the at least two irradiation procedures.
7. A particle therapy unit comprising:
a particle source that is operable to generate particles,
an accelerator that is operable to accelerate the particles and to provide a high-energy particle beam,
a high-energy beam transport system that is operable to direct the high-energy particle beam formed of the accelerated particles into an irradiation chamber,
an energy adjusting device that is operable to adjust an energy of the high-energy particle beam, and
a control device that is configured to control at least two irradiation procedures of a target volume, the control device being configured to control the energy adjusting device to vary the energy of the high-energy particle beam in the at least two irradiation procedures in such a way that the target volume is irradiated layer-wise in layers that are spatially arranged one behind another,
wherein the control device is configured to control the at least two irradiation procedures such that a sequence of layers that are irradiated in a first of the at least two irradiation procedures runs in an alternate direction to a sequence of layers that are irradiated in a second of the at least two irradiation procedures, with respect to a direction of incidence of the high-energy particle beam.
8. The particle therapy unit as claimed in claim 7 , wherein the accelerator, the high-energy beam transport system, or the accelerator and the high-energy beam transport system include at least one superconducting magnet.
9. The particle therapy unit as claimed in claim 8 , wherein the energy of the high-energy particle beam is adjusted using the energy adjusting device in the direction of incidence of the high-energy particle beam upstream of the at least one superconducting magnet, and
wherein a magnetic field that is generated by the at least one superconducting magnet is synchronized with the energy of the high-energy particle beam.
10. A method for controlling energy of a particle beam during an irradiation of a target volume, in which the target volume is irradiated using at least two irradiation procedures, the method comprising:
varying the energy of the particle beam such that in the at least two irradiation procedures, the target volume is irradiated layer-wise in layers that are spatially arranged one behind another, and a sequence, in which the layers of the target volume are irradiated in one of the at least two irradiation procedures, is varied from a first of the at least two irradiation procedures to a second of the at least two irradiation procedures, in a direction of incidence of the particle beam,
wherein the sequence of layers that are irradiated in one irradiation procedure runs in an alternate direction from irradiation procedure to irradiation procedure in the direction of incidence of the particle beam.
11. The method as claimed in claim 10 , wherein the sequence, in which the layers of the target volume are irradiated in one of the irradiation procedures, is varied in such a way that in a transition from the first of the at least two irradiation procedures to the second of the at least two irradiation procedures, an identical layer is irradiated or adjacent layers are irradiated.
12. The method as claimed in claim 10 , wherein the same layers of the target volume are irradiated in the at least two irradiation procedures.
13. The method as claimed in claim 10 , wherein different layers of the target volume are irradiated in the at least two irradiation procedures.
14. The method as claimed in claim 10 , wherein the direction of incidence of the particle beam remains identical from the first of the at least two irradiation procedures to the second of the at least two irradiation procedures.
15. The method as claimed in claim 10 , wherein the direction of incidence of the particle beam is varied from the first of the at least two irradiation procedures to the second of the at least two irradiation procedures.
16. The method as claimed in claim 10 , wherein the energy of the particle beam is adjusted before the particle beam is directed by a superconducting magnet of an accelerator or of a high-energy beam transport system.
17. The method as claimed in claim 10 , wherein the sequence, in which the layers of the target volume are irradiated in one of the irradiation procedures, is varied in such a way that in a transition from the first of the at least two irradiation procedures to the second of the at least two irradiation procedures, an identical layer is irradiated or adjacent layers are irradiated.