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EP-3808409-B1 - RADIOTHERAPY APPARATUS

EP3808409B1EP 3808409 B1EP3808409 B1EP 3808409B1EP-3808409-B1

Inventors

  • LIU, HAIFENG
  • LI, DALIANG

Dates

Publication Date
20260506
Application Date
20190805

Claims (13)

  1. A radiotherapy device, comprising: a radiotherapy unit (10) configured to emit a treatment beam to a to-be-treated area (T) of a patient, wherein in use the to-be-treated area (T) of the patient is located outside the radiotherapy unit (10); and wherein the to-be treated area (T) of the patient includes one or more to-be-treated target sites; and an imaging unit (20) arranged adjacent to the radiotherapy unit (10) and configured to emit an imaging beam to the to-be-treated area (T) of the patient, wherein the radiotherapy unit (10) comprises: a radioactive source (S) configured to emit a treatment beam; wherein the radiotherapy unit further comprises: a shielding body (101), a source carrier (102), and a collimator (103) arranged in sequence from outside to inside, wherein the shielding body (101) covers the source carrier (102), the source carrier (102) covers the collimator (103), the radioactive source (S) is located on the source carrier (102); and the treatment beam emitted by the radioactive source (S) is focused on an intersection point (I) located outside the radiotherapy unit (10) through the collimator (103), and the intersection point coincides with an imaging center of the imaging unit; wherein the source carrier (102) and/or the collimator (103) are rotatable around a rotation axis(RA), wherein in use the intersection point (I) coincides with one of the target sites of the to-be-treated area (T) of the patient, and the imaging unit (20) is arranged on an end surface on an edge of the source carrier (102) or the collimator (103) so that the imaging unit (20) can rotate with the rotation of the source carrier (102) or the collimator (103) around the rotation axis (Ra).
  2. The radiotherapy device according to claim 1, wherein the radiotherapy unit (10) comprises: a first radiotherapy unit (10A) and a second radiotherapy unit (10B), and the imaging unit (20) is located between the first radiotherapy unit (10A) and the second radiotherapy unit.
  3. The radiotherapy device according to claim 1, further comprising: a radioactive source receiving unit (30) configured to receive and store the radioactive source (S) when the radiotherapy device is not in operation.
  4. The radiotherapy device according to claim 1, further comprising: a first anti-sinking unit (1041) provided between the shielding body (101) and the source carrier (102).
  5. The radiotherapy device according to claim 4, further comprising: a second anti-sinking unit (1042) provided between the source carrier (101) and the collimator (103).
  6. The radiotherapy device according to claim 1, wherein the radioactive source (S) is arranged on a source box (S1), and the source carrier (102) comprises: a source box mounting hole within which the source box (S1) is mounted.
  7. The radiotherapy device according to claim 6, wherein the shielding body (101) comprises: a source box shielding hole (1011) and a source box shielding block (1012), a size of the source box shielding hole (1011) is greater than or equal to a size of the source box mounting hole, and the source box shielding block (1012) is adapted to the source box shielding hole (1011).
  8. The radiotherapy device according to claim 1, wherein the imaging unit (20) comprises an imaging source (202) and an imager (203), a center axis of an imaging beam emitted by the imaging source (202) deviates from a reference axis, and the reference axis is an axis that passes through the imaging center (R) and is perpendicular to the imager (203).
  9. The radiotherapy device according to claim 1, wherein the imaging unit (20) comprises a shielding member (201) arranged adjacent to the radiotherapy unit (10) and configured to shield the treatment beam passing through the intersection point (I).
  10. The radiotherapy device according to claim 9, wherein the shielding member (201) is hollow-shaped or sheet-shaped.
  11. The radiotherapy device according to claim 1, wherein the imaging unit (20) comprises at least one of: an X-ray apparatus, a CT apparatus, an MRI apparatus, a PET apparatus, an ultrasonic apparatus, or a DSA apparatus.
  12. The radiotherapy device according to claim 1, further comprising: a shielding door (50) configured to turn on or off the radiotherapy device, and/or shield the treatment beam emitted from the radiotherapy unit (10).
  13. The radiotherapy device according to claim 1, wherein the radiotherapy unit (10) is bowl-shaped or tube-shaped.

Description

TECHNICAL FIELD The present disclosure relates to the field of medical equipment technologies, and in particular to a radiotherapy device. BACKGROUND At present, in order to improve the speed and precision of tumor positioning to radiotherapy, a radiotherapy device usually simply combines a radiotherapy unit and an imaging unit, such that a patient is not required to be moved from an imaging chamber with the imaging unit to a treatment chamber with the radiotherapy unit, thereby realizing radiotherapy of a tumor of the patient. For example, first, the patient is sent to the imaging unit for imaging by moving a position of the treatment couch in the radiotherapy device, then a treatment plan is formulated based on a size, a shape, surrounding tissues, and the like of the tumor in the imaging; and then, the patient is sent to the radiotherapy unit by moving the treatment couch and the treatment couch is positioned, such that the tumor position is consistent with the tumor position in the treatment plan, thereby realizing radiotherapy of the tumor of the patient. A system combining a radiotherapy unit and an imaging unit is described in publication CN 102 430 206 A. SUMMARY The invention is defined by the claims. Embodiments of the present disclosure provide a radiotherapy device, including: a radiotherapy unit configured to emit a treatment beam to a to-be-treated area of a patient, the to-be-treated area of the patient being located outside the radiotherapy unit; and an imaging unit arranged adjacent to the radiotherapy unit and configured to emit an imaging beam to the to-be-treated area of the patient. Alternatively, the radiotherapy unit includes a first radiotherapy unit and a second radiotherapy unit, and the imaging unit is located between the first radiotherapy unit and the second radiotherapy unit. The radiotherapy unit includes: a radioactive source, a treatment beam emitted by the radioactive source is focused on an intersection point located outside the radiotherapy unit, and the intersection point coincides with an imaging center of the imaging unit. Alternatively, the radiotherapy device further includes: a radioactive source receiving unit configured to receive and store the radioactive source when the radiotherapy device is not in operation. The radiotherapy unit further includes: a shielding body, a source carrier, and a collimator which are covered together in sequence, the radioactive source is located on the source carrier; and the treatment beam emitted by the radioactive source is focused on the intersection point through the collimator. The source carrier and/or the collimator are rotatable around a rotation axis, and/or movable along a preset trajectory. The imaging unit is provided on an end surface on an edge of the source carrier or the collimator. Alternatively, the radiotherapy unit is bowl-shaped or tube-shaped. Alternatively, the radioactive source is uniformly distributed on the source carrier in a spiral shape or uniformly distributed on the source carrier in a peripheral direction. Alternatively, the radiotherapy device further includes: a first anti-sinking unit provided between the shielding body and the source carrier. Alternatively, the radiotherapy device further includes: a second anti-sinking unit provided between the source carrier and the collimator. Alternatively, both the first anti-sinking unit and the second anti-sinking unit are bearings. Alternatively, the radioactive source is arranged on a source box, and the source carrier includes: a source box mounting hole within which the source box is mounted. Alternatively, the shielding body includes: a source box shielding hole and a source box shielding block, a size of the source box shielding hole is greater than or equal to a size of the radioactive source mounting hole, and the source box shielding block is adapted to the source box shielding hole. Alternatively, the imaging unit includes an imaging source and an imager, a center axis of an imaging beam emitted by the imaging source deviates from a reference axis, and the reference axis is an axis that passes through the imaging center and is perpendicular to the imager. Alternatively, the imaging unit includes a shielding member arranged adjacent to the radiotherapy unit and configured to shield the treatment beam passing through the intersection point. Alternatively, the shielding member is hollow-shaped or sheet-shaped. Alternatively, the imaging unit is at least one of: an X-ray apparatus, a CT apparatus, an MRI apparatus, a PET apparatus, an ultrasonic apparatus, or a DSA apparatus. Alternatively, the radiotherapy device further includes: a shielding door configured to turn on or off the radiotherapy device, and/or shield the treatment beam emitted from the radiotherapy unit. Alternatively, the radiotherapy device further includes: a treatment couch arranged at a side of the imaging unit. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings are used