Radiotherapy treatment device comprising image acquisition device and irradiation device, and radiotherapy method

1. A radiotherapy treatment device comprising:

an image acquisition device;

an irradiation device including a linear accelerator, and;

a patient positioning device having a patient positioning platform, wherein a movement device is provided for jointly moving the image acquisition device and the irradiation device between an irradiation position, in which a radiotherapeutic treatment of a patient located on the patient positioning platform is possible by means of the irradiation device, and an image acquisition position, in which an image acquisition of the patient located on the patient positioning platform is possible by means of the image acquisition device.

2. The radiotherapy treatment device as claimed in claim 1 , wherein the movement device comprises a guidance system for the irradiation device and the image acquisition device.

3. The radiotherapy treatment device as claimed in claim 2 , wherein the guidance system is arranged on a ceiling and/or on a floor of a room containing the radiotherapy treatment device.

4. The radiotherapy treatment device as claimed in claim 2 , wherein the guidance system extends along a longitudinal axis of the patient positioning platform of the patient positioning device.

5. The radiotherapy treatment device as claimed in claim 1 , further comprising a collision avoidance device having at least one sensor for monitoring a relative position of a patient located on the patient positioning platform and components of the image acquisition device and the irradiation device.

6. The radiotherapy treatment device as claimed in claim 1 , wherein the patient positioning device has at least one protection means protecting the patient against moving components of the image acquisition device and the irradiation device.

7. The radiotherapy treatment device as claimed in claim 6 , wherein the at least one protection means has at least one protective body, in particular a protective cushion and/or a protective section integrally molded to a shape of the patient positioning platform, arranged at an edge of the patient positioning platform of the patient positioning device.

8. The radiotherapy treatment device as claimed in claim 6 , wherein the at least one protection means is embodied as at least partially integral with a patient immobilizing device, the patient immobilizing device in particular having a positioning means which is stiffened by vacuumization.

9. The radiotherapy treatment device as claimed in claim 1 , wherein a support structure of the patient positioning device is arranged such that parts of the image acquisition device and/or the irradiation device are driven under the patient positioning platform.

10. The radiotherapy treatment device as claimed in claim 9 , wherein the support structure is provided on the side of the irradiation device which is not partially driven under the patient positioning platform.

11. The radiotherapy treatment device as claimed in claim 9 , wherein a retaining device of the irradiation device at least partially surrounds the support structure or is at least partially surrounded by the latter.

12. The radiotherapy treatment device as claimed in claim 9 , wherein the patient positioning device includes the central support structure and the patient positioning platform, the patient positioning platform being movable in the direction of the irradiation device in order to assume the irradiation position, and movable in the direction of the image acquisition device in order to assume the image acquisition position.

13. The radiotherapy treatment device as claimed in claim 1 , wherein in the case of an image acquisition device embodied as a magnetic resonance device, the irradiation target is positioned in the irradiation position inside a patient receiving means of the image acquisition device, but outside of the homogeneity region of the image acquisition device.

14. The radiotherapy treatment device as claimed in claim 1 , wherein the image acquisition device is a magnetic resonance device.

15. A radiotherapy method for treating an irradiation target in a patient by means of a radiotherapy treatment device comprising: an image acquisition device, an irradiation device including providing a linear accelerator, and a patient positioning device having a patient positioning platform; and, positioning a patient in an irradiation position, in which a radiotherapeutic treatment of a patient located on the patient positioning platform takes place by means of the irradiation device, and an image acquisition position, in which an image acquisition of the patient located on the patient positioning platform takes place by means of the image acquisition device, are assumed by means of a movement device for jointly moving the image acquisition device and the irradiation device.

16. The method as claimed in claim 15 , wherein a position of the irradiation target is determined and/or monitored by means of an evaluation device from image data acquired by means of the image acquisition device.

17. The method as claimed in claim 16 , wherein the irradiation is interrupted at least once during the entire period of the irradiation and the radiotherapy treatment device is moved into the image acquisition position in order to acquire the image data serving for monitoring the position of the target.

18. The method as claimed in claim 15 , wherein during a periodic movement in a target region comprising the irradiation target, in particular a respiratory motion, a series of image data reflecting at least one cycle of the periodic movement is recorded in the image acquisition position, motion information of the irradiation target is determined from the series of image data and taken into account taking into consideration the signals of at least one monitoring device monitoring the periodic movement, in particular a respiratory belt and/or an X-ray device integrated in the irradiation device and/or an ultrasound device integrated in the patient positioning device, for the purpose of controlling the irradiation device in order to ensure correct irradiation of the irradiation target.