CN107412960B

CN107412960B - Neutron capture treatment system

Info

Publication number: CN107412960B
Application number: CN201710544870.9A
Authority: CN
Inventors: 刘渊豪; 陈韦霖
Original assignee: Neuboron Medtech Ltd
Current assignee: Neuboron Medtech Ltd
Priority date: 2015-11-12
Filing date: 2015-11-12
Publication date: 2019-08-06
Anticipated expiration: 2035-11-12
Also published as: CN106474633B; CN107412960A; CN107569781B; CN107569781A; CN107412962B; CN106474633A; CN107412961B; CN107412961A; CN107412962A

Abstract

The application provides a kind of neutron capture treatment system, including beam-shaping body, it includes beam entrance, set on the intracorporal neutron generating unit of beam-shaping, it is adjacent to the slow body of neutron generating unit, it is enclosed in slow external reflector and beam outlet, nuclear reaction occurs for neutron generating unit to generate neutron with the proton beam from beam entrance incidence, slow body is slow by the neutron generated from neutron generating unit, the neutron that reflector will deviate from is back to the slow body to improve epithermal neutron intensity of beam, beam-shaping body includes that at least one can be to movable part that is separate or moving close to neutron generating unit direction, the movable part has first position and the second position, the movable part moves between the first position and the second position, when movable part is located at first position, neutron generating unit can be replaced；When movable part is located at the second position, neutron generating unit can not be replaced.The replacement of the application neutron generating unit is convenient, and structure is simple, use flexibly.

Description

Neutron capture treatment system

Technical field

The present invention relates to a kind of neutron capture treatment systems, more particularly to a kind of neutron that can replace neutron generating unit to catch Obtain treatment system.

Background technique

As the radiation cures such as the development of atomics, such as cobalt 60, linear accelerator, electron beam have become cancer One of the main means of disease treatment.However conventional photonic or electronic therapy are limited by radioactive ray physical condition itself, are being killed While dead tumour cell, normal tissue a large amount of in beam approach can also be damaged；Additionally, due to tumour cell to putting The difference of radiation-sensitive degree, traditional radiation therapy is for relatively having the malignant tumour of radiation resistance (such as: multirow glioblast Tumor (glioblastoma multiforme), melanocytoma (melanoma)) treatment effect it is often bad.

Target therapy in order to reduce the radiation injury of tumour surrounding normal tissue, in chemotherapy (chemotherapy) Concept is just applied in radiation cure；And it is directed to the tumour cell of radiation resistance, also actively development has high phase at present To the radiation source of biological effect (relative biological effectiveness, RBE), as proton therapeutic, heavy particle are controlled Treatment, neutron capture treatment etc..Wherein, neutron capture treatment is to combine above two concept, if boron neutron capture is treated, by Boracic drug gathers in the specificity of tumour cell, and accurately neutron beam regulates and controls for cooperation, provides more better than conventional radiation Treatment of cancer selection.

In the treatment of accelerator boron neutron capture, the neutron for nuclear reaction to occur with proton beam and generates neutron beam is generated Portion need to be subjected to accelerating proton irradiation and it is activation can generate a degree of damage, and neutron generating unit is to the neutron of generation The quality of beam has very important influence, must periodic replacement in order to reduce influence of the neutron generating unit to neutron beam quality Neutron generating unit.

However, it is mostly cylindrical body that accelerator boron neutron capture in the prior art, which treats slow body, neutron generating unit is logical It is normally placed in the slow body of certain depth, when neutron generating unit, which is damaged, to be needed replacing, it is necessary to take more multiple steps It is disassembled, this will lead to more changing jobs for neutron generating unit and is not easy to carry out.

Therefore, it is really necessary to provide the new technical solution of one kind to solve the above problems.

Summary of the invention

To solve the above-mentioned problems, one aspect of the present invention provides a kind of neutron capture treatment system, including beam is whole Body, the beam-shaping body include beam entrance, set on the intracorporal neutron generating unit of beam-shaping, be adjacent to neutron generating unit Slow body, be enclosed in neutron generating unit and slow external reflector and beam outlet, the neutron generating unit with described in Nuclear reaction occurs for the proton beam of beam entrance incidence to generate neutron, and the slow body will be from neutron generating unit generation Sub slow, the neutron that the reflector will deviate from improves epithermal neutron intensity of beam, the beam back to the slow body Shaping body include at least one can to far from or the movable part that move close to neutron generating unit direction, the movable part is the It is moved between one position and the second position, when movable part is located at first position, neutron generating unit can be replaced；Work as movable part When positioned at the second position, when movable part is located at the second position, neutron generating unit can not be replaced, and the movable part is part The combination of the slow body of reflector or partial reflector and part.

Further, for the ease of the replacement of neutron generating unit, preferably as one kind, the movable part is that part is reflected Body, the front that the slow body is arranged in the neutron generating unit are enveloped by the reflector, and the slow body abuts against institute State the rear of neutron generating unit.

Further, for the ease of the taking-up of neutron generating unit, the movable part has symmetrical plane, the movable part edge The symmetrical plane is symmetrical, and the neutron generating unit has axis, and the symmetrical plane of the movable part passes through the neutron generating unit Axis, the reflector has first straight line height, and the movable part has second straight line height, neutron generating unit tool There is third straight line height, the second straight line height is less than or equal to first straight line height and is greater than third straight line height.

Further, when the second straight line height of the movable part is equal to the first straight line height of reflector, if living Faying face between moving part and reflector is the connection between plane and plane, is generated during underway sub- capture treatment Radiation will be revealed by the faying face, preferably the reflector has first connecting portion as a kind of, and described first connects Socket part has the first joint face and the first faying face, and the movable part has second connecting portion, and the second connecting portion has the Two joint faces and the second faying face are greater than neutron when the second straight line height of movable part is less than the first straight line height of reflector When the third straight line height of generating unit, the first joint face of the reflector is overlapped with the first faying face, and the of the movable part Two joint faces are overlapped with the second faying face, the first faying face connection of the second faying face of the movable part and reflector and with institute Any one plane where adding neutron generating unit axis is stated to be overlapped.

Further, the reflector has first connecting portion, and the first connecting portion has the first joint face and first Faying face, the movable part have second connecting portion, and the second connecting portion has the second joint face and the second faying face, works as institute When stating the second straight line height of movable part and being equal to the first straight line height of reflector, first joint face and the first faying face connect Different Plane is connect but is located at, second joint face connect with the second faying face but is located at Different Plane, first joint face It is connect with the second joint face, the first faying face is connect with the second faying face.

Further, the neutron capture treatment system further includes driving assembly, and the driving component includes carrying activity The door lock of part and allow door lock to far from or close to the guide rail that moves of neutron generating unit direction, the door lock is along guide rail to separate Or moved close to the direction of beam-shaping body, when door lock far from beam-shaping body direction to when moving, the movable part is to remote Direction movement from neutron generating unit；When moving when door lock to the direction close to beam-shaping body, the movable part is in The direction of sub- generating unit moves.

Further, the guide rail is external set on beam-shaping, and the driving component further includes support frame, support frame as described above One end support door lock other end moved in guide rail, the door lock with support frame move along the rail and to separate or close The direction of beam-shaping body moves.

Further, the neutron capture treatment system further includes driving assembly, and the driving component includes door lock and branch Support door lock and the rotating member for allowing door lock to rotate, the door lock supports movable part, described when door lock is rotated up around rotating member Movable part is moved to the direction close to neutron generating unit；When door lock is rotated down around rotating member, the movable part is to far from The direction of sub- generating unit moves.

Further, the neutron capture treatment system that is used for further includes driving assembly, and the driving component includes first Connecting rod, second connecting rod and the third connecting rod for connecting the first, second connecting rod, it is external that the first connecting rod is fixed on beam-shaping, institute The one end for stating second connecting rod is fixed on the movable part other end and is connected to first connecting rod, and the first connecting rod drives third connecting rod fortune Dynamic, third connecting rod drives second connecting rod movement so that movable part is moved to the direction far from or close to neutron generating unit.

Further, it is greater than when the second straight line height of the movable part is less than the first straight line height of the reflector The third straight line height of neutron generating unit, the reflector is interior to be equipped with guide rail, and the movable part is installed in beam-shaping body simultaneously It can be moved along guide rail to the direction far from or close to neutron generating unit.

Compared with prior art, the application has the advantages that the application can be to separate or lean on by setting The movable part of nearly neutron generating unit direction movement, convenient for the replacement of neutron generating unit, structure is simple, use flexibly.

Detailed description of the invention

Fig. 1 is the schematic diagram of the application neutron capture treatment system；

Fig. 2 a the application movable part is located at the schematic diagram of the second position；

Fig. 2 b is the schematic diagram that the application movable part is located at first position；

Fig. 3 a be the first faying face connection of herein described the second faying face of movable part and reflector and with the neutron The schematic diagram that plane where the axis of generating unit is overlapped；

Fig. 3 b is cross-sectional view of the application movable part along symmetrical plane A；

Fig. 4 a is the first joint face of reflector and the schematic diagram of the inclined angle setting of the first faying face；

Fig. 4 b is the groove surface of the movable part schematic diagram mutually chimeric with the raised face of reflector；

Fig. 5 a is that piecemeal activity part is embedded the schematic diagram in door lock；

Fig. 5 b is the schematic diagram that driving assembly has support frame；

Fig. 6 is the schematic diagram of the embodiment of the present application two；

Fig. 7 is the schematic diagram of the embodiment of the present application three；

Fig. 8 is the schematic diagram of the embodiment of the present application four.

Specific embodiment

Neutron capture treatment as a kind of effective treating cancer means in recent years using gradually increasing, wherein with boron Neutron capture treatment is most commonly seen, and the neutron of supply boron neutron capture treatment can be supplied by nuclear reactor or accelerator.This Shen By taking the treatment of accelerator boron neutron capture as an example, the basic module of accelerator boron neutron capture treatment generally includes to use embodiment please It is whole in accelerator, neutron generating unit and the hot removal system and beam accelerated to charged particle (such as proton, deuteron) Body, wherein charged particle and the effect of metal neutron generating unit is accelerated to generate neutron, according to required neutron yield rate and energy, can The characteristics such as the acceleration charged particle energy of offer and the materialization of size of current, metal neutron generating unit are anti-to select suitable core It answers, the nuclear reaction being often discussed has⁷Li(p,n)⁷Be and⁹Be(p,n)⁹B, both reactions are all the endothermic reaction.Two kinds of nuclear reactions Energy threshold be respectively 1.881MeV and 2.055MeV, since the ideal neutron source of boron neutron capture treatment is keV energy etc. The epithermal neutron of grade can produce phase if being theoretically only slightly taller than the proton bombardment lithium metal neutron generating unit of threshold values using energy To the neutron of low energy, clinic can be used for by being not necessary to too many slow processing, however in two kinds of lithium metal (Li) and beryllium metal (Be) Sub- generating unit and the proton-effect section of threshold values energy be not high, to generate sufficiently large neutron flux, usually selects higher-energy Proton cause nuclear reaction.

Ideal neutron generating unit should have high neutron yield rate, generation neutron energy distribution close to epithermal neutron energy area, Without wear by force too much radiation generate, the characteristics such as cheap easily operated and high temperature resistant of safety, but actually and can not find meet it is all It is required that nuclear reaction.In boron neutron capture therapeutic process, neutron generating unit, must due to impact, radiation by accelerating proton So it will receive damage, and neutron generating unit has very big influence to the quality for the neutron beam that beam-shaping body generates, so Being replaced periodically or according to the damage situations of neutron generating unit to neutron generating unit just seems necessary, is described below one Kind can replace the neutron capture treatment system of neutron generating unit.

Fig. 1 is the schematic diagram of the application neutron capture treatment system 100.The neutron capture treatment system 100 includes penetrating Beam shaping body 10 and driving assembly 20.

The beam-shaping body 10 includes beam entrance 11, neutron generating unit 12, is adjacent to the slow of neutron generating unit 12 Body 13 is enclosed in neutron generating unit 12 and reflector 14 and beam outlet 15 outside slow body 13.The neutron generating unit 12 with Nuclear reaction occurs to generate neutron from the incident proton beam of the beam entrance 11, the slow body 13 is generated to from the neutron The neutron that portion 12 generates carries out slowly, and the neutron that the reflector 14 will deviate from is back to the slow body 13 to improve in superthermal Sub-beam intensity.

The reflector 14 includes that at least one can be to activity that is separate or moving close to 12 direction of neutron generating unit Part 16.The movable part 16 has first position L1 and second position L2 (in conjunction with Fig. 2 a and Fig. 2 b), and the movable part 16 is at this It is moved between first position L1 and second position L2, when movable part 16 is located at first position L1, neutron generating unit 12 can be by Replacement；When movable part 16 is located at second position L2, neutron generating unit 12 can not be replaced.Specifically, when the activity When part 16 moves to first position L1 to the direction far from neutron generating unit 12, neutron generating unit 12 is revealed from beam-shaping body 10 Out, it takes out neutron generating unit 12 and neutron generating unit 12 is replaced；When the neutron generating unit 12 more finished changing is installed on beam After in shaping body 10, the movable part 16 moves to second position L2 (movable part 16 to the direction close to neutron generating unit 12 It is coated on the periphery of neutron generating unit 12, neutron generating unit 12 can not be replaced), it should in subsequent neutron capture therapeutic process Movable part 16 and reflector 14 lead back to the neutron of deviation jointly.

The movable part 16 can be the combination of the slow body of partial reflector or partial reflector and part.Movable part 16 Refer to that neutron generating unit 12 is arranged in the front of slow body 13 and is enveloped by reflector 14 for the case where partial reflector, slow body 13 abut against the rear of neutron generating unit 12, as long as setting mobilizable structure (i.e. movable part) for partial reflector at this time, By movable part far from replacing neutron generating unit.Movable part 16 is that the case where slow body of partial reflector and part combines is Refer to, the front that a part of neutron generating unit 12 is located at slow body 13 is coated by reflector 14, and a part is embedded in slow body 13 Middle to be coated by slow body 13, at this time in order to replace neutron generating unit 12, by being coated on, the part outside neutron generating unit 12 is anti- The slow body of beam and part is set as mobilizable structure (i.e. movable part), to realize the replacement of neutron generating unit 12.

In conjunction with Fig. 3 a and Fig. 3 b, for the ease of the replacement of neutron generating unit 12, preferably as one kind, the movable part 16 For symmetrical member, which has symmetrical plane A, and movable part 16 is symmetrical along symmetrical plane A, and the symmetrical plane A passes through institute The axis I of neutron generating unit 12 is stated, the reflector 14 has first straight line height H1, and the movable part 16 has second straight line Height H2, the neutron generating unit 12 have third straight line height H3, the second straight line height H2 of the movable part 16 be less than or Person be equal to reflector 14 first straight line height H1 and be greater than the neutron generating unit 12 third straight line height H3.

In conjunction with Fig. 4 a and Fig. 4 b, the reflector 14 also has first connecting portion 140, and the movable part 16 has second to connect Socket part 160.The first faying face that the first connecting portion 140 has the first joint face 141 and connect with the first joint face 141 142, the second faying face 162 that the second connecting portion 160 has the second joint face 161 and connect with the second joint face 161.

It is greater than described when the second straight line height H2 of the movable part 16 is less than the first straight line height H1 of reflector 14 When the third straight line height H3 of neutron generating unit 12,142 weight of the first joint face 141 and the first faying face of the reflector 14 It closes, the second joint face 161 of the movable part 16 is overlapped with the second faying face 162, the second faying face 162 of the movable part 16 It connect with the first faying face 142 of reflector 14 and is overlapped with any one plane where the axis of the neutron generating unit 12 (such as Fig. 3 a).At this time the movable part 16 be reflector 14 a part, in this case, when the movable part 16 to When direction far from neutron generating unit 12 moves to first position L1, movable part 16 forms notch on the reflector 14, institute It states neutron generating unit 12 to expose from the notch, neutron generating unit 12 is replaced in the indentation, there；When the movable part 16 to When moving to second position L2 close to the direction of neutron generating unit 12, the movable part 16 is enclosed in the neutron generating unit 12 Periphery, movable part 16 and reflector 14 lead back to the neutron of deviation jointly in subsequent neutron capture therapeutic process.

When the second straight line height H2 of the movable part 16 is equal to the first straight line height H1 of reflector 14, the activity Part 16 is the half for being enclosed in the reflector 14 of 12 periphery of neutron generating unit.In order to reduce in subsequent neutron capture therapeutic process In the particle that leaks from the junction of movable part 16 and reflector 14 or radiation, as it is a kind of preferably, the reflector 14 The first joint face 141 and the first faying face 142 be located at Different Plane, the second joint face 161 and second of the movable part 16 Faying face 162 is located at Different Plane, and first joint face 141 is bonded with the second joint face 161, the first faying face 142 and The fitting of two faying faces 162.First connecting portion 140 and second connecting portion 160 specific as follows can be arranged (in conjunction with Fig. 4 a), the second connection Face 161 and the inclined angle of the second faying face 162 are arranged, and first faying face 142 is set with the inclined angle of the first joint face 141 Set, both of the aforesaid inclination angle and be 180 degree.Second described in when movable part 16 is enclosed in the periphery of the neutron generating unit 12 Faying face 162 is bonded with the first faying face 142, and the second joint face 161 is bonded with the first joint face 141.First connecting portion 140 with Second connecting portion 160 can also be arranged as follows (in conjunction with Fig. 4 b), and second faying face 162 is recessed from the second joint face 161 Groove surface, first faying face 142 are from the raised face outstanding of the first joint face 141, when movable part 16 is enclosed in described Groove surface and raised face are mutually chimeric when the periphery of sub- generating unit 12.

The structure of driving assembly 20 is introduced in detail below, in addition, because having carried out in detail to the structure of movable part 16 above It is thin to introduce, it is hereafter just not repeated to describe, it in actual application, can be according to specific requirements by the knot of above-mentioned movable part 16 Structure is combined with driving assembly 20 described below, although and being that there are two movable parts with reflector tool in Examples below For be illustrated, but can be convenient for neutron generating unit 12 if movable part 16 is arranged in actual application Replacement, then one movable part of setting.

It is also embodiments herein one shown in Fig. 2 a and Fig. 2 b, which is that there are two be located at the tool of reflector 14 It is carried out for 12 two sides of neutron generating unit and the movable part 16 (i.e. the first movable part 163 and the second movable part 164) interconnected It introduces.The driving component 20 includes the door lock 22 of the guide rail 21 and support movable part 16 outside beam-shaping body 10, described Door lock 22 is moved in guide rail 21 to drive movable part 16 to move to the direction far from or close to neutron generating unit 12.Movable part 16 include the first movable part 163 and the second movable part 164, and the door lock 22 includes 221 He of the first door lock moved along guide rail 21 Second door lock 222, first door lock 221 support the first movable part 163, and second door lock 222 supports the second movable part 164.First door lock 221 and the second door lock 222 move in guide rail 21 drives first movable part 163 and second respectively Movable part 164 is moved to the direction far from or close to neutron generating unit 12.When the first door lock 221 and the second door lock 222 are distinguished When moving to first position L1 to the direction far from beam-shaping body 10, first movable part 163 and the second movable part 164 It is moved respectively to the direction far from neutron generating unit 12, neutron generating unit 12 is exposed from beam-shaping body 10 at this time, to neutron Generating unit 12 is replaced；When the first door lock 221 and the second door lock 222 are moved to the direction close to neutron generating unit 12 respectively When the L2 of the second position, first movable part 163 and the second movable part 164 are also moved directly to the direction close to neutron generating unit 12 It is coated on 12 periphery of neutron generating unit to the first movable part 163 and the second movable part 164, in subsequent neutron capture therapeutic process Described in the first movable part 163 and the second movable part 164 be used to lead back to the neutron of deviation.

For the ease of structure design, preferably as one kind, the knot of first movable part 163 and the second movable part 164 Structure is identical, and first door lock 221 is identical with the structure of the second door lock 222, infra for introduction is convenient for, with general designation activity Part 16 and door lock 22 are introduced.

The structure of the door lock 22 can there are many kinds of, in the present embodiment, the second straight line height H2 of the movable part 16 Equal to reflector 14 first straight line height H1 when, door lock 22 is coated on the periphery of movable part 16, it can be understood as movable part 16 It is entrenched in door lock 22, movement of the door lock 22 in guide rail 21 is equivalent to the open and close movement of door lock 22, the movable part 16 With door lock 22 folding far from or close to neutron generating unit 12.Preferably as one kind, the door lock 22 is made of concrete. Certainly, in order to save space or cost, the half of movable part 16 even less part can also be embedded in door lock 22 (in conjunction with Fig. 5 a), if the design of door lock 22 can support the movable part 16, and movable part 16 can be driven to separate or It is moved close to the direction of neutron generating unit 12.When the second straight line height H2 of movable part 16 is less than the first straight of reflector 14 Can also support frame 23 (in conjunction with Fig. 5 b) be set between door lock 22 and guide rail 21 when line height.One end of support frame as described above 23 with Door lock 22 is fixed, and the other end moves in guide rail 21 to the direction far from or close to beam-shaping body 10.The movable part 16 It is moved along guide rail 21 to the direction far from or close to neutron generating unit 12 with the movement of door lock 22.That is, the door lock 22 drive the movement of door lock 22 sufficiently large to avoid needing for door lock 22 to be arranged to by movement of the support frame 23 in guide rail 21 Size moves it directly in guide rail 21, to reduce the size of door lock 22.

Fig. 6 show the schematic diagram of the embodiment of the present application two.The driving component 20 include rotating member 24 (such as shaft member) and The door lock 22 ' being immobilizated on rotating member 24.The rotating member 24 is located at the underface of beam-shaping body 10 and the rotating member 24 Axis it is parallel with the axis of the neutron generating unit 12.The door lock 22 ' is rotated upwardly and downwardly around rotating member 24, when the door lock 22 ' when moving downward, and the door lock 22 ' drives movable part 16 move to the direction far from neutron generating unit 12, the neutron production Life portion 12 exposes, and replaces neutron generating unit 12；When door lock 22 ' is rotated up, drive movable part 16 to close to neutron generating unit 12 direction rotation, the movable part 16 are enclosed in 12 periphery of neutron generating unit, are used in subsequent neutron capture therapeutic process Lead back to the neutron of deviation.

Fig. 7 is the schematic diagram that the application implements three.Driving assembly 20 described in the present embodiment includes being fixed on beam-shaping First connecting rod 25 outside body 10, the second connecting rod 26 for being connected to movable part 16 and connection first connecting rod 25 and second connecting rod 26 Third connecting rod 27, the third connecting rod 27 movement drive second connecting rod 26 to move, the movable part 16 with second connecting rod 26 fortune The separate or direction close to neutron generating unit 12 of trend moves.

Fig. 8 is the schematic diagram of the embodiment of the present application four.When the second straight line height H2 of movable part 16 is less than the reflector (especially when the second straight line height H2 of movable part 16 is greater than the third straight line of neutron generating unit 12 when 14 first straight line height H1 When height H3), guide rail 28 can be set, and handle 165 is arranged in the outside wall surface of movable part 16 in reflector 14, pass through push-and-pull Handle 165 drives movable part 16 to move along guide rail 28 to the direction far from or close to neutron generating unit 12.It is of course also possible to will As soon as driving assembly of the above-described embodiment into embodiment three is not situated between in detail in this present embodiment to substitute handle herein It continues.

The neutron capture treatment system that the application discloses is not limited to content described in above embodiments and attached drawing institute The structure of expression.Apparently change that material and shape and position on the basis of the application to wherein component are made is replaced Generation or modification, all this application claims within the scope of.

Claims

1. a kind of neutron capture treatment system, including beam-shaping body, it is characterised in that: the beam-shaping body includes that beam enters Mouthful, set on the intracorporal neutron generating unit of beam-shaping, the slow body for being adjacent to neutron generating unit, to be enclosed in neutron generating unit gentle With the proton beam from the beam entrance incidence nuclear reaction occurs for the external reflector of speed and beam outlet, the neutron generating unit To generate neutron, the neutron generating unit has axis, and the slow body is slow by the neutron generated from the neutron generating unit, The neutron that the reflector will deviate from improves epithermal neutron intensity of beam, the beam-shaping body packet back to the slow body At least one movable part that can be moved to separate or close neutron generating unit direction is included, the movable part has first position And the second position, the movable part move between the first position and the second position, when movable part is located at first position, in Sub- generating unit can be replaced；When movable part is located at the second position, neutron generating unit can not be replaced, and the movable part is The combination of the slow body of partial reflector or partial reflector and part, the reflecting part includes first connecting portion, the activity Part includes second connecting portion, when movable part is located at first position, the first connecting portion and second connecting portion separation；Work as activity When part is located at the second position, the first connecting portion is combined with second connecting portion.

2. neutron capture treatment system according to claim 1, it is characterised in that: the movable part is partial reflector, The front that the slow body is arranged in the neutron generating unit is enveloped by the reflector, and the slow body abuts against in described The rear of sub- generating unit.

3. neutron capture treatment system according to claim 1, it is characterised in that: the movable part has symmetrical plane, The movable part is symmetrical along the symmetrical plane, and the neutron generating unit has axis, and the symmetrical plane of the movable part passes through institute The axis of neutron generating unit is stated, the reflector has perpendicular to the first straight line of axis direction and movable part direction of motion height Degree, the movable part have the second straight line height perpendicular to axis direction and the movable part direction of motion, and the neutron generates Portion have perpendicular to axis direction and the movable part direction of motion third straight line height, the second straight line height be less than or It is greater than third straight line height equal to first straight line height.

4. neutron capture treatment system according to claim 2, it is characterised in that: the reflector has the first connection Portion, the first connecting portion have the first joint face and the first faying face, the movable part have second connecting portion, described second Interconnecting piece has the second joint face and the second faying face, when movable part is perpendicular to the of axis direction and the movable part direction of motion Two straight line height are less than reflector and are greater than neutron perpendicular to the first straight line height of axis direction and the movable part direction of motion When generating unit is perpendicular to the third straight line height of axis direction and the movable part direction of motion, the first joint face of the reflector It is overlapped with the first faying face, the second joint face of the movable part is overlapped with the second faying face, and the second of the movable part combines Face connects with the first faying face of reflector and is overlapped with any one plane where the neutron generating unit axis.

5. neutron capture treatment system according to claim 2, it is characterised in that: the reflector has the first connection Portion, the first connecting portion have the first joint face and the first faying face, the movable part have second connecting portion, described second Interconnecting piece has the second joint face and the second faying face, when the movable part is perpendicular to axis direction and the movable part direction of motion Second straight line height be equal to reflector perpendicular to the first straight line height of axis direction and the movable part direction of motion when, it is described First joint face and the first faying face connect but are located at Different Plane, and second joint face connect but is located at the second faying face Different Plane, first joint face are connect with the second joint face, and the first faying face is connect with the second faying face.

6. neutron capture treatment system according to claim 1, it is characterised in that: the neutron capture treatment system is also wrapped Driving assembly is included, the driving component includes carrying the door lock of movable part and allowing door lock to separate or close neutron generating unit The guide rail of direction movement, the door lock are moved along guide rail to far from or close to the direction of beam-shaping body, when door lock is to separate When beam-shaping body direction moves, the movable part is moved to the direction far from neutron generating unit；When door lock is whole to close beam When the direction movement of body, the movable part is moved to the direction close to neutron generating unit.

7. neutron capture treatment system according to claim 6, it is characterised in that: the guide rail is set to beam-shaping body Outside, when the second straight line height of movable part is less than the first straight line height of reflector, the driving component further includes support frame, One end support door lock other end of support frame as described above moves in guide rail, and the door lock moves along the rail and Xiang Yuan with support frame From or close to beam-shaping body direction move.

8. neutron capture treatment system according to claim 1, it is characterised in that: the neutron capture treatment system is also wrapped Driving assembly is included, the driving component includes door lock and supports door lock and allow the rotating member of door lock rotation, the door lock support Movable part, when door lock is rotated up around rotating member, the movable part is moved to the direction close to neutron generating unit；When door lock around When rotating member rotates down, the movable part is moved to the direction far from neutron generating unit.

9. neutron capture treatment system according to claim 1, it is characterised in that: the neutron capture treatment system is also wrapped Driving assembly is included, the driving component includes first connecting rod, second connecting rod and the third connecting rod for connecting the first, second connecting rod, institute It states first connecting rod and is fixed on that beam-shaping is external, one end of the second connecting rod is fixed on the movable part other end and is connected to third company Bar, the first connecting rod drive third connecting rod movement, and third connecting rod drives second connecting rod movement so that movable part is to separate Or it is moved close to the direction of neutron generating unit.

10. neutron capture treatment system according to claim 2, it is characterised in that: when the movable part is perpendicular to axis The second straight line height of direction and the movable part direction of motion is less than the reflector and transports perpendicular to axis direction and movable part The first straight line height in dynamic direction and to be greater than neutron generating unit straight perpendicular to the third of axis direction and the movable part direction of motion Line height, is equipped with guide rail in the reflector, the movable part be installed in beam-shaping body and can along guide rail to separate or Person moves close to the direction of neutron generating unit.