CN213159021U - Neutron capture therapy system - Google Patents
Neutron capture therapy system Download PDFInfo
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- CN213159021U CN213159021U CN202020341192.3U CN202020341192U CN213159021U CN 213159021 U CN213159021 U CN 213159021U CN 202020341192 U CN202020341192 U CN 202020341192U CN 213159021 U CN213159021 U CN 213159021U
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Abstract
The application provides a neutron capture treatment system, including the vacuum tube that is used for transmitting the charged particle beam, the neutron production department that is used for producing the neutron beam and the beam integer who carries out the plastic to the neutron beam, the beam integer is seted up the portion of acceping, and neutron production department locates the tip of vacuum tube, and the vacuum tube includes first position and second position, neutron capture treatment system still includes the shifting-out device, the shifting-out device includes the removal part that drives the motion of vacuum tube, and the removal part includes third position and fourth position, and when the removal part was located the third position, the vacuum tube was located the first position; when the moving part is located at the fourth position, the vacuum tube is located at the second position, and the neutron generating part is located on the outer side of the beam shaping body. The vacuum tube with the neutron generating part is detached through the shifting-out device, direct contact between workers and the neutron generating part after nuclear reaction is reduced, and radiation potential safety hazards of the workers are reduced.
Description
Technical Field
The utility model relates to a radioactive ray irradiation system especially relates to a neutron capture treatment system.
Background
With the development of atomic science, radiation therapy such as cobalt sixty, linacs, electron beams, etc. has become one of the main means of cancer treatment. However, the traditional photon or electron therapy is limited by the physical conditions of the radiation, and can kill tumor cells and damage a large amount of normal tissues in the beam path; in addition, due to the difference of the sensitivity of tumor cells to radiation, the conventional radiotherapy has poor effect on the treatment of malignant tumors with relatively high radiation resistance, such as multiple linear glioblastoma (glioblastomas) and melanoma (melanoma).
In order to reduce the radiation damage of normal tissues around the tumor, the target therapy concept in chemotherapy (chemotherapy) is applied to radiotherapy; for tumor cells with high radiation resistance, radiation sources with high Relative Biological Effect (RBE) such as proton therapy, heavy particle therapy, neutron capture therapy, etc. are also actively developed. Wherein, the neutron capture treatment combines the two concepts, such as boron neutron capture treatment, and provides better cancer treatment selection than the traditional radioactive rays by the specific accumulation of boron-containing drugs in tumor cells and the precise neutron beam regulation.
In an accelerator neutron capture therapy system, a charged particle beam is accelerated by an accelerator, the charged particle beam is accelerated to energy enough to overcome the nuclear coulomb repulsion of the neutron generating part in a beam shaping body, and the charged particle beam and the neutron generating part generate neutrons through nuclear reaction, so that the neutron generating part is irradiated by the high-power accelerated charged particle beam in the process of generating neutrons, the temperature of the neutron generating part is greatly increased, the service life of the neutron generating part is influenced, therefore, the neutron generating part is necessary to be replaced by the neutron generating part, a large amount of radiation rays are inevitably stored in the neutron generating part irradiated by the high-energy-level accelerated charged particle beam, and therefore, the potential radiation safety hazard is inevitably generated when the neutron generating part is replaced.
SUMMERY OF THE UTILITY MODEL
In order to provide a neutron capture therapy system for reducing radiation safety hazards, one embodiment of the application provides a neutron capture therapy system, which comprises a vacuum tube for transmitting a charged particle beam, a neutron generation part for generating the neutron beam, and a beam shaping body for shaping the neutron beam, wherein the beam shaping body is provided with a containing part, the vacuum tube comprises a first end part and a second end part, the neutron generation part is arranged at the first end part, the vacuum tube comprises a first position and a second position, the neutron capture therapy system further comprises a removing device for moving the vacuum tube between the first position and the second position, the vacuum tube is arranged at the first position, and the neutron generation part can react with the charged particle beam to generate neutrons; the vacuum tube is located at the second position, and the neutron generating part is located outside the beam shaping body.
Preferably, the removing device comprises a moving part which drives the vacuum tube to move, the moving part comprises a third position and a fourth position, the transverse extending direction of the beam shaping body is defined as the X direction, the moving part moves between the third position and the fourth position along the X direction, and when the moving part is located at the third position, the vacuum tube is located at the first position; when the moving part is located at the fourth position, the vacuum tube is located at the second position.
Further, the removing device also comprises at least one clamping part which can clamp or release the vacuum tube, and the clamping part moves along with the moving part in the X direction. In this embodiment, the number of the clamping portions is four, each two clamping portions are in one group, and each group has two clamping portions and is arranged in an upper row and a lower row. Of course, the number of the clamping parts can be any number as long as the clamping parts can clamp or release the vacuum tube and can clamp the vacuum tube to move along with the moving part. For another example, the clamping portion is a circular hole-shaped structure, and the vacuum tube is clamped by enlarging or reducing the circular hole of the clamping portion.
Further, the removing device also comprises a tensioning part supporting the clamping part, the tensioning part moves along with the moving part in the X direction, and the clamping part penetrates through the tensioning part and rotates relative to the tensioning part to clamp or release the vacuum tube. Specifically, the tensioning part is provided with a first through hole, the clamping part penetrates through the first through hole and is supported by the hole wall of the first through hole, and the clamping part rotates in the first through hole to clamp or loosen the vacuum tube.
Furthermore, the removing device also comprises a supporting part fixedly connected to the moving part, the supporting part is closer to the vacuum tube relative to the tensioning part in the X direction, the tensioning part comprises a fifth position and a sixth position, a connecting piece extends from the tensioning part to the supporting part, and the connecting piece penetrates through the supporting part to allow the tensioning part to move between the fifth position and the sixth position. The vacuum tube further comprises a seventh position between the first position and the second position, the vacuum tube being in the first position when the tension section is in the fifth position; when the tensioning part is positioned at the sixth position, the vacuum tube is positioned at the seventh position, and the abutting part abuts against the second end part of the vacuum tube; the clamping part passes through the abutting part through the tensioning part and is positioned on the surface of the vacuum tube so as to clamp or loosen the vacuum tube. Specifically, the abutting portion is provided with a second through hole, the connecting piece is supported by the hole wall of the second through hole, and the connecting piece penetrates through the second through hole and moves relative to the second through hole to allow the tensioning portion to move between a fifth position and a sixth position. The supporting part is also provided with a third through hole penetrating through the supporting part, and the clamping part penetrates through the third through hole through the first through hole and is positioned on the surface of the vacuum tube. The arrangement of the abutting part provides the vacuum tube with abutting force except the clamping force of the clamping part, so that the vacuum tube can keep balance in the process of moving between the first position and the second position, the phenomenon that the vacuum tube is inclined in the moving process and is dry with the containing part of the beam shaping body is reduced, and the vacuum tube is easier to move out of the beam shaping body.
Furthermore, the moving portion, the tensioning portion and the abutting portion are of plate-shaped structures, the moving portion comprises a first side face and a second side face opposite to the first side face, the abutting portion comprises a third side face and a fourth side face opposite to the third side face, the tensioning portion comprises a fifth side face and a sixth side face opposite to the fifth side face, the third side face, the fifth side face and the sixth side face are parallel to each other, the third side face, the fourth side face, the fifth side face and the sixth side face are perpendicular to the first side face and the second side face, the first through hole penetrates through the sixth side face from the fifth side face, the second through hole penetrates through the fourth side face from the third side face, and the third through hole penetrates through the fourth side face from the third side face.
Preferably, the removing device further comprises an aligning portion for determining the relative position of the removing device and the vacuum tube, the aligning portion is fixedly arranged on the abutting portion, and the clamping portion is closer to the outer surface of the vacuum tube than the aligning portion. The alignment part is used for aligning the shifting-out device with the vacuum tube, namely determining the relative position relation between the moving device and the vacuum tube, and after the positions of the moving device and the vacuum tube are determined according to the alignment part, the clamping part of the moving device is positioned outside the vacuum tube. In this embodiment, the number of the aligning portions is four, and the aligning portions are uniformly distributed on the outer periphery of the clamping portion. In other embodiments, the alignment portion may be any number as long as the alignment portion is provided so as not to interfere with the actuation of the clamping portion and can function as a guide alignment. For example, the alignment portion is a circular hole structure capable of being enlarged or reduced, and the whole moving device is guided to be aligned with the vacuum tube through the circular hole of the enlarged or reduced alignment portion.
Furthermore, the removing device also comprises two reinforcing parts, the reinforcing parts are connected to the first side surface of the moving part and the fourth side surface of the abutting part, and the tensioning part is positioned between the moving part and the two reinforcing parts.
Furthermore, the shifting-out device also comprises a shielding part for shielding the neutron generating part, the clamping part and the moving part are both positioned in the shielding part and move in the shielding part, and when the vacuum tube is positioned at the second position, the neutron generating part is accommodated in the shielding part. As a specific implementation mode, the shielding part comprises a bottom wall provided with the moving part, a top wall arranged opposite to the bottom wall, and a side wall connected with the bottom wall and the top wall, the bottom wall and the side wall are connected to form a shielding space, the clamping part and the moving part are both located in the shielding space and move in the shielding space, and when the vacuum tube is located at the second position, the neutron generating part is contained in the shielding space.
Further, the side walls include a first side wall capable of opening or closing the shield, the vacuum tube being movable from a first position to a second position when the first side wall opens the shield; when the first sidewall closes the shield, the vacuum tube is in the second position.
In the present application, because the seventh position is between the first position and the second position, the movement of the vacuum tube between the first position and the second position in the present application includes the movement of the vacuum tube from the first position to the seventh position and the movement of the vacuum tube from the seventh position to the second position; in addition, since the vacuum tube is always located in the shielded space during the target changing process, it is clear that each displacement distance of the vacuum tube during the movement from the first position to the second position is equal to the distance of the vacuum tube moving from the beam shaper to the shielded space.
The neutron capture treatment system reduces the participation of workers in the target changing process through the arrangement of the shifting-out device, reduces the contact of the workers and the radiation rays, and reduces the potential safety hazard of radiation.
Drawings
FIG. 1 is a perspective view of a neutron capture treatment system of the present application, wherein a neutron production section is in a first position;
FIG. 2 is a schematic view of another angle of the neutron capture therapy system shown in FIG. 1;
FIG. 3 is a schematic view of the moving part of FIG. 2 in a third position, in which the beam shaper is partially in section;
FIG. 4 is a schematic view of the removal device for target exchange including the movement of the displacement portion from the third position to the fourth position, the tensioning portion from the fifth position to the sixth position, and the vacuum tube from the first position to the seventh position and the second position;
FIG. 5 is a schematic view of the removal device away from the beam shaper after the target change is completed;
FIG. 6 is a schematic view of a removal device of the present application;
FIG. 7 is a schematic view of a removal device that does not include a shield;
fig. 8 is a schematic view of another angle of the removal device of fig. 7.
Detailed Description
The use of neutron capture therapy as an effective means of treating cancer has increased in recent years, with boron neutron capture therapy being the most common, the neutrons that supply boron neutron capture therapy being availableTo be supplied by a nuclear reactor or accelerator. Embodiments of the present application take the example of an accelerator boron neutron capture therapy, the basic components of which generally include an accelerator for accelerating charged particles (e.g., protons, deuterons, etc.), a neutron generation and heat removal system, and a beam shaper. The accelerated charged particles react with the metal neutron generating part to generate neutrons, and the appropriate nuclear reaction is selected according to the required neutron yield and energy, the available energy and current of the accelerated charged particles, the physical and chemical properties of the metal neutron generating part and the like. The nuclear reactions in question are often7Li(p,n)7Be and9Be(p,n)9b, the two reactions are both endothermic reactions, and the energy thresholds of the two nuclear reactions are 1.881MeV and 2.055MeV, respectively. Because the ideal neutron source for boron neutron capture therapy is epithermal neutrons at the keV energy level, theoretically, if protons with energy slightly higher than the threshold are used to bombard the metallic lithium neutron generating part, neutrons with relatively low energy can Be generated, and the metallic lithium neutron generating part can Be used clinically without too much slowing treatment, however, the interaction cross section of the two neutron generating parts of lithium metal (Li) and beryllium metal (Be) and protons with threshold energy is not high, and in order to generate a sufficiently large neutron flux, protons with higher energy are usually selected to initiate nuclear reaction.
An ideal neutron generator should have the characteristics of high neutron yield, neutron energy distribution near the epithermal neutron energy region (described in detail below), not too much intense penetrating radiation generation, safety, cheapness, easy operation, and high temperature resistance, but actually cannot find a nuclear reaction meeting all the requirements. The embodiment of the present application adopts a neutron generating section made of lithium metal. However, it is well known to those skilled in the art that the material of the neutron generating part may be made of other metal materials than the metal materials mentioned above.
The requirements for the heat removal system vary depending on the nuclear reaction chosen, e.g.7Li(p,n)7Be has a higher requirement for a heat removal system due to the difference between the melting point and the thermal conductivity of the metal neutron generating part (lithium metal)9Be(p,n)9B is high. In the examples of the present application7Li(p,n)7Nuclear reaction of Be. Thus, the high energy is receivedThe temperature of the neutron generating section to which the charged particle beam is irradiated at an accelerated level inevitably increases greatly, thereby affecting the service life of the neutron generating section.
The neutron capture therapy system inevitably has a problem of replacing the neutron generating section. To address this problem, and at the same time, minimize exposure of personnel to radiation, the present application provides a neutron capture treatment system.
Since the main radiation to the target changing person is radiation generated by a nuclear reaction occurring after the charged particle beam is irradiated to the neutron generating unit, the present application intends to explain removal of the neutron generating unit after the nuclear reaction, and does not explain installation of a new neutron generating unit.
As shown in fig. 1 and 2, the neutron capture therapy system 100 includes a vacuum tube 10 for transporting a charged particle beam P, a neutron generating section (not shown) provided at an end of the vacuum tube 10 for generating a neutron beam N, a beam shaper 20 for shaping the neutron beam N, and a removal device 30 for removing the vacuum tube 10.
Referring to fig. 3 to 5, the beam shaper 20 is opened with a receiving portion 21, and in the present embodiment, the vacuum bulb 10 includes an embedded portion 11 embedded in the receiving portion 21 and an extending portion 12 extending out of the beam shaper 20 and extending out of the receiving portion 21. The end of the embedded portion 11 is a first end (not numbered), and the end of the protruding portion 12 is a second end (not numbered). A neutron generator (not shown) is provided at the first end and moves with the vacuum tube 10. The vacuum tube 10 includes a first position L1 and a second position L2, and the removal device 30 moves the vacuum tube 10 between the first position L1 and the second position L2. When the vacuum tube 10 is located at the first position L1, the neutron generating unit (not shown) can react with the charged particle beam P to generate neutrons; when the vacuum tube 10 is located at the second position L2, the neutron generating unit (not shown) is located outside the beam shaper 20.
Referring to fig. 6 to 8, the removing device 30 includes a moving part 31 for moving the vacuum tube 10 between a first position L1 and a second position L2, a holding part 32 for holding the vacuum tube 10 and moving along with the moving part 31, and a shielding part (not numbered) for shielding the vacuum tube 10 provided with a neutron generating part (not shown).
Referring to fig. 4, the transverse extending direction of the beam shaper 20 is defined as the X direction, the moving part 31 includes a third position L3 and a fourth position L4, and the moving part 31 moves between the third position L3 and the fourth position L4 along the X direction. When the moving part 31 is located at the third position L3, the vacuum tube 10 is located at the first position L1, and the neutron generating part (not shown) can react with the charged particle beam to generate neutrons; when the moving unit 31 is located at the fourth position L4, the bulb 10 is located at the second position L2, and the neutron generator (not shown) is located outside the beam shaper 20 and is accommodated in the shielding unit (not shown).
Referring to fig. 6, in the embodiment of the present invention, there are four clamping portions 32, and each two clamping portions 32 are in a group, and each group has two clamping portions and is arranged in an upper and a lower row. When the moving part 31 is located at the third position L3, the clamping part 32 is located at the outer surface of the vacuum tube 10 and clamps or unclamps the outer surface of the vacuum tube 10 as required. In another embodiment, the vacuum tube may be provided with a flange or a groove, and the clamping portion may be clamped to the flange or the groove of the vacuum tube. Of course, the clamping portion 32 may be any number as long as the clamping portion 32 can clamp or release the vacuum tube 10 and can move the vacuum tube 10 along with the moving portion 31. For example, the number of the clamping portions is two, and the angle between the two clamping portions is 180 degrees in order to provide sufficient clamping force to the vacuum tube. Likewise, when the number of the clamping portions is three, the three clamping portions are uniformly distributed in the circumferential direction of the vacuum tube in order to provide a sufficient clamping force to the vacuum tube. For another example, the clamping portion is a circular hole structure capable of being enlarged or reduced, and the vacuum tube is loosened or clamped by enlarging or reducing the circular hole of the clamping portion. Specifically, the clamping part includes first clamping part, one end is connected in first clamping part other end and the first clamping part second clamping part that separates and is used for connecting or unclamping the hasp portion of first clamping part and second clamping part, first clamping part and second clamping part integrated into one piece, can regard clamping part quantity as one. As an embodiment, the first clamping portion and the second clamping portion are respectively provided with a threaded hole at a separated end, and the locking portion comprises a threaded rod and a nut matched with the threaded rod. The screw rod passes the screw hole of first clamping part and the screw hole of second clamping part, revolves the nut of twisting on the screw rod and makes first clamping part and second clamping part or connect, and whole clamping part is the round hole form when first clamping part links together with the second clamping part, and the degree of screwing up of nut has decided the aperture size of round hole to make the clamping part press from both sides tightly or loosen the vacuum tube. The locking part can be of other mechanical structures as long as the first clamping part and the second clamping part can clamp or loosen the vacuum tube. In addition, the first clamping part and the second clamping part can also be of a structure with two separated ends, and the clamping parts clamp or loosen the vacuum tube by arranging two locking parts. In this case, the number of the clamping portions may be two.
With reference to fig. 7 and 8, the removing device 30 further includes a holding portion 34 fixedly connected to the moving portion 31 and moving together with the moving portion 31, and a tightening portion 35 capable of moving relative to the holding portion 34. In the X direction, the abutting portion 34 is closer to the neutron generating portion (not shown) than the tightening portion 35. The tension part 35 moves in the X direction along with the moving part 31, and the clamping part 32 passes through the tension part 35 and rotates relative to the tension part 35 to clamp or release the outer surface of the vacuum tube 10. In the present application, the moving portion 31, the abutting portion 34, and the tightening portion 35 are all plate-shaped structures. The moving portion 31 includes a first side 311 and a second side 312 opposite to the first side 311, the holding portion 34 includes a third side 341 and a fourth side 342 opposite to the third side 341, and the tightening portion 35 includes a fifth side 351 and a sixth side 352 opposite to the fifth side 351. The third side 341, the fourth side 342, the fifth side 351, and the sixth side 352 are parallel to each other, and the third side 341, the third side 342, the fifth side 351, and the sixth side 352 are perpendicular to the first side 311 and the second side 312.
A connecting member 353 extends from the fifth side 351 of the tension portion 35 to the fourth side 342 of the holding portion 34, at least two first through holes 354 with rectangular cross sections penetrate from the fifth side 351 to the sixth side 352 of the tension portion 35, a second through hole 343 penetrates from the third side 341 to the fourth side 342 of the holding portion 34, the connecting member 353 is supported on the wall of the second through hole 343 and can move relative to the holding portion 34 in the X direction in the second through hole 343, and the tension portion 35 moves together with the connecting member 353. The third through hole 344 corresponding to the first through hole 354 is formed through the third side 341 of the holding portion 34 toward the fourth side 342, the cross section of the third through hole 344 is also rectangular, and the clamping portion 32 passes through the first through hole 354 and enters the third through hole 344. The clamping portion 32 is supported by the wall of the first through hole 354 and can be rotated in the first through hole 354 and the third through hole 344 by the support of the first through hole 354, thereby clamping or unclamping the outer surface of the vacuum tube 10. In the present application, in order that the rotation range of the clamping portion 32 in the first through hole 354 is not limited by the third through hole 344, the size of the third through hole 344 is larger than the size of the first through hole 354 in the rotation direction. The clamping portion 32 and the tensioning portion 34 are relatively fixed in the X-direction, that is, the clamping portion 32 and the tensioning portion 34 move together in the X-direction. The tension part 35 has a fifth position L5 and a sixth position L6, the vacuum tube 10 further comprises a seventh position L7 between the first position L1 and the second position L2, and the tension part 35 moves between the fifth position L5 and the sixth position L6 relative to the holding part 34 with the movement of the connecting member 353 in the second through hole 343. When the tightening part 35 is in the fifth position L5, the vacuum tube 10 is in the first position L1; when the tightening part 35 is in the sixth position L6, the vacuum tube 10 is in the seventh position L7, in which the abutment 34 abuts against the end of the projection 12 of the vacuum tube 10. This has the advantage that before the moving part 31 moves the vacuum tube 10 to the second position L2, the tensioning part 35 moves from the fifth position L5 to the sixth position L6 to move the clamping part 32 clamping the vacuum tube 10, so that the end of the protruding part 22 of the vacuum tube 10 abuts against the abutting part 35, i.e. the vacuum tube 10 moves to the seventh position L7. Therefore, when the vacuum tube 10 is moved, in addition to the clamping force provided by the clamping portion 32 to the vacuum tube 10, the abutting portion 34 also provides the abutting force to the vacuum tube 10, so that the vacuum tube 10 can be kept balanced during the movement, the vacuum tube 10 is prevented from being tilted and being dry with the accommodating portion 21 during the movement, and the vacuum tube 10 is easier to move out of the accommodating portion 21. Of course, in other embodiments, the vacuum tube 10 may be completely embedded in the receiving portion 21 without providing an extending portion, in which case the clamping portion 32 directly extends into the receiving portion 21 to clamp the vacuum tube 10, or the clamping portion may be provided to clamp the second end portion of the vacuum tube, so that the vacuum tube 10 moves between the first position L1 and the second position L2 along with the movement of the moving portion 31 between the third position L3 and the fourth position L4. In the implementation, a filling part (not numbered) for shielding is further provided between the inner wall of the housing part 21 and the outer wall of the bulb 10, and the filling part moves together with the bulb when the bulb is clamped by the clamping part and the bulb moves together with the moving part from the first position L1 to the second position L2.
The shielding part (not numbered) includes a top wall 331, a bottom wall 332 disposed opposite to the top wall 331, and a side wall 333 connecting the top wall 331 and the bottom wall 332, and a shielding space 334 for accommodating the moving part 31, the tightening part 34, and the abutting part 35 is formed among the top wall 331, the bottom wall 332, and the side wall 333. The moving portion 31 is disposed on the bottom wall 332, and the moving portion 31, the clamping portion 32, the tensioning portion 34 and the abutting portion 35 all move in the shielding space 334. The side walls 333 comprise a first side wall 335, the first side wall 335 being openable or closable, the vacuum tube 10 being movable from a first position L1 to a second position L2 when the first side wall 335 is opened; when the vacuum tube 10 is in the second position L2, the first sidewall 335 is closed and the vacuum tube 10 is shielded. The distance that the vacuum tube 10 moves from the first position L1 to the second position L2 is always equal to the distance that the vacuum tube 10 moves from the beam shaper 20 into the shielded space 334.
In the embodiment of the present application, the removing device 30 further includes two reinforcing portions 36 located in the shielding space 334, the reinforcing portions 36 are connected to the first side 311 of the moving portion 31 and the fourth side 342 of the abutting portion 34, and the tightening portion 35 is located between the moving portion 31 and the two reinforcing portions 36. The provision of the reinforcement 36 can increase the overall strength of the removal device 30. The third side 341 of the abutting portion 34 further holds at least two alignment portions 37 for determining the relative position of the removing device 30 and the vacuum tube 10, so that the clamping portion 32 is located on the outer surface of the vacuum tube 10. In the present embodiment, the number of the alignment portions 37 is four, two alignment portions 37 are provided in one set, and each set of the alignment portions 37 is located outside each set of the holding portions 32. The fact that each set of alignment portions 37 is located outside each set of clamping portions 32 as described herein is understood that when the moving portion 31 is located at the third position L3, the clamping portions 32 are located closer to the outer surface of the vacuum tube 10 than the alignment portions 37. Before the removal device 30 performs the target changing operation, the relative position between the removal device 30 and the vacuum tube 10 is determined based on the alignment portion 37.
The moving device 30 further includes a driving part (not numbered). The driving part includes a first driving part 41 for driving the moving part 31 to move between a third position L3 and a fourth position L4, a second driving part 42 for driving the clamping part 32 to clamp or unclamp the outer surface of the vacuum tube 10, a third driving part 43 for driving the tensioning part 35 to move between a fifth position L5 and a sixth position L6, and a fourth driving part 44 for driving the first sidewall 335 to open or close the shielding part (not numbered).
In the present application, the first driving part 41 and the fourth driving part 44 are rodless cylinders, the first side 311 of the moving part 31 is disposed on the first driving part 41, and the moving part 31 moves between the third position L3 and the fourth position L4 under the action of the first driving part 41; the first sidewall 335 is disposed on the fourth driving portion 44, and the first sidewall 335 is opened or closed by the fourth driving portion. In the embodiment of the present application, the second driving unit 42 is a thin pneumatic claw cylinder. The third driving portion 43 is a telescopic cylinder, one end of the telescopic cylinder is connected to the fourth side 342 of the abutting portion 34, and the other end of the telescopic cylinder is fixedly connected to the fifth side 351 of the tensioning portion 35, so that the tensioning portion 35 moves between a fifth position L5 and a sixth position L6 relative to the abutting portion 34 under the action of the third driving portion 43.
The neutron capture therapy system 100 further comprises a movable support 50, the removing device 30 is disposed on the support 50, and the fourth driving part 44 is disposed on a side of the support 50 close to the beam shaper 20. The support 50 is adjusted in accordance with the alignment portion 37 so that the clamping portion 32 is located on the outer surface of the extension 12 of the vacuum tube 10 to determine the relative position of the removal device 30 and the vacuum tube. The direction perpendicular to the X direction is defined as the Y direction, and the support portion 50 can be extended or shortened in the Y direction in the present application.
The target changing process of the removing device 30 will be explained below.
S1, adjusting the support 50 by the alignment portion 37 to determine the relative position of the removal device 30 and the vacuum tube 10;
s2, the moving part 31 is driven by the first driving part 41 to move to the third position L3, when the protruding part 12 of the vacuum tube 10 enters the shielding space 334 of the shielding part 33, the vacuum tube is located at the first position L1, the fourth driving part 44 drives the first side wall 335 to open the shielding part, the clamping part 32 is located at the vacuum tube 10 and is in a released state, and the tensioning part 35 is located at the fifth position L5;
s3, driving the clamping part 32 to clamp the outer surface of the vacuum tube 10 by the second driving part 42;
s4, the third driving part 43 drives the tension part 35 to move from the fifth position L5 to the sixth position L6, at which time the vacuum tube 10 moves from the first position L1 to the seventh position L7;
s5, the first driving part 41 drives the moving part 31 to move from the third position L3 to the fourth position L4, at which time the vacuum tube moves from the seventh position L7 to the second position L2, at which time the vacuum tube 10 is completely accommodated in the shielded space 334;
s6, the fourth driving part 44 drives the first sidewall 335 to close the shielding part;
s7, the support 50 is moved so that the removing device 30 housing the vacuum tube 10 is away from the beam shaper 20.
The neutron capture treatment system disclosed in the present application is not limited to the above-described embodiments and the structures shown in the drawings, and obviously changes, substitutions or modifications of the materials, shapes and positions of the components in the neutron capture treatment system based on the present application are within the scope of the present application.
Claims (10)
1. A neutron capture therapy system, characterized by: the neutron capture treatment system comprises a vacuum tube for transmitting charged particle beams, a neutron generating part for generating neutron beams, and a beam shaping body for shaping the neutron beams, wherein the beam shaping body is provided with a containing part, the vacuum tube comprises a first end part and a second end part, the neutron generating part is arranged at the first end part of the vacuum tube, the vacuum tube comprises a first position and a second position, the neutron capture treatment system further comprises a moving-out device for enabling the vacuum tube to move between the first position and the second position, the vacuum tube is positioned at the first position, and the neutron generating part can react with the charged particle beams to generate neutrons; the vacuum tube is located at the second position, and the neutron generating part is located outside the beam shaping body.
2. The neutron capture therapy system of claim 1, wherein: the moving-out device comprises a moving part which drives the vacuum tube to move, the moving part comprises a third position and a fourth position, the transverse extending direction of the beam shaping body is defined as the X direction, the moving part moves between the third position and the fourth position along the X direction, and when the moving part is located at the third position, the vacuum tube is located at the first position; when the moving part is located at the fourth position, the vacuum tube is located at the second position.
3. The neutron capture therapy system of claim 2, wherein: the removing device also comprises at least one clamping part which can clamp or release the vacuum tube, and the clamping part moves along with the moving part in the X direction.
4. The neutron capture therapy system of claim 3, wherein: the removing device also comprises a tensioning part supporting the clamping part, the tensioning part moves along with the moving part in the X direction, and the clamping part penetrates through the tensioning part and rotates relative to the tensioning part to clamp or release the vacuum tube.
5. The neutron capture therapy system of claim 4, wherein: the removing device further comprises a supporting part fixedly connected to the moving part, the supporting part is closer to the vacuum tube relative to the tensioning part in the X direction, the tensioning part comprises a fifth position and a sixth position, a connecting piece extends from the tensioning part to the supporting part, the connecting piece penetrates through the supporting part to allow the tensioning part to move between the fifth position and the sixth position, the vacuum tube further comprises a seventh position located between the first position and the second position, and when the tensioning part is located at the fifth position, the vacuum tube is located at the first position; when the tensioning part is positioned at the sixth position, the vacuum tube is positioned at the seventh position, and the abutting part abuts against the second end part of the vacuum tube; the clamping part passes through the abutting part through the tensioning part to clamp or loosen the vacuum tube.
6. The neutron capture therapy system of claim 5, wherein: the moving portion, the tensioning portion and the abutting portion are all of plate-shaped structures, the moving portion comprises a first side face and a second side face arranged opposite to the first side face, the abutting portion comprises a third side face and a fourth side face arranged opposite to the third side face, the tensioning portion comprises a fifth side face and a sixth side face arranged opposite to the fifth side face, the third side face, the fourth side face, the fifth side face and the sixth side face are parallel to each other, and the third side face, the fourth side face, the fifth side face and the sixth side face are perpendicular to the first side face and the second side face.
7. The neutron capture therapy system of claim 5, wherein: the removing device further comprises an aligning part used for determining the relative position of the removing device and the vacuum tube, the aligning part is arranged on the abutting part, and the clamping part is closer to the outer surface of the vacuum tube than the aligning part.
8. The neutron capture therapy system of claim 6, wherein: the shifting-out device further comprises two reinforcing parts, the reinforcing parts are connected to the first side face of the moving part and the fourth side face of the abutting part, and the tensioning part is located between the moving part and the two reinforcing parts.
9. The neutron capture therapy system of claim 3, wherein: the shift-out device further comprises a shielding part for shielding the neutron generating part, the clamping part and the moving part are both located in the shielding part and move in the shielding part, and when the vacuum tube is located at the second position, the neutron generating part is contained in the shielding part.
10. The neutron capture therapy system of claim 9, wherein: the shielding part comprises a first side wall, the first side wall can open or close the shielding part, and when the shielding part is opened by the first side wall, the vacuum tube can move from a first position to a second position; when the first sidewall closes the shield, the vacuum tube is in the second position.
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| CN202020341192.3U CN213159021U (en) | 2020-03-18 | 2020-03-18 | Neutron capture therapy system |
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| CN202020341192.3U CN213159021U (en) | 2020-03-18 | 2020-03-18 | Neutron capture therapy system |
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