CN203829493U - Proton tomography device - Google Patents
Proton tomography device Download PDFInfo
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- CN203829493U CN203829493U CN201420263875.6U CN201420263875U CN203829493U CN 203829493 U CN203829493 U CN 203829493U CN 201420263875 U CN201420263875 U CN 201420263875U CN 203829493 U CN203829493 U CN 203829493U
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Abstract
The utility model discloses a proton tomography device. The device comprises a treatment head, a modulation matching module, a magnetic lens group, and an image acquisition module, wherein the treatment head is used for emitting proton beams; the modulation matching module is used for carrying out modulation, matching and shaping on the proton beams to enable the proton beams to irradiate on the predetermined location of an object; the magnetic lens group is used for enabling the proton beams to realize 1 to 1 imaging; the image acquisition module is used for realizing real-time image acquisition by using scintillation crystal and a CCD camera; the modulation matching module, the magnetic lens group and the image acquisition module are all connected onto the same rotary support and the order from the top bottom in the vertical direction is sequentially the modulation matching module, the magnetic lens group and the image acquisition module. The technical effects that by adopting the tomography method, the precision is high, errors are small, and the spatial resolution is high can be realized.
Description
Technical field
This utility model relates to proton radiological study field, relates in particular to a kind of proton tomoscanning device.
Background technology
Along with scientific and technological development and progress, environment is also going from bad to worse, and more pathological changes has appearred in corresponding people's health, as tumor etc., along with the day by day raising of people to healthy attention degree, also stronger to the demand of effective Therapeutic Method of tumor.
General tumor therapeuticing method on the market, can be summarized as three kinds of operations, chemotherapy, radiotherapy substantially, compatible complementary each other, and most of tumor patient all will adopt X-ray therapy.The particle types that current X-ray therapy adopts has electronics, X ray, gamma ray, proton and heavy ion, and the different-energy attenuation characteristic of these particles in human body brought different therapeutic effect.Comparatively speaking, Proton Radiation Therapy has the dose distribution that is better than X ray and electronics, can realize the Partial controll of tumor; And due to proton, to ionize formed secondary electron density low, can reduce Normocellular damage.Generally speaking, Proton Radiation Therapy is a kind of advanced person's radiation therapy technology, international coverage inner proton radiotherapy apparatus has formed industrial chain at present, the proton radiation therapy device of commencement of commercial operation both at home and abroad has tens, the proton beam of these devices is provided by accelerator, and ceiling capacity scope concentrates on 200 ~ 400MeV.
Proton radiation therapy system has following 3 requirements for realizing highly conformal accurate radiotherapy, comprising: the accurate prediction of proton range; The accurate calculating of radiation dose; The hi-Fix of patient's focus.The implementation method generally adopting is at present to utilize X ray computer tomoscan (CT) imaging system to determine the energy of proton beam, the position of sweep parameter and treatment head, the information such as direction, but there is the following shortcoming in this mode: the range information that the 1 X ray attenuation quotient obtaining from CT image is converted to proton beam exists larger uncertainty, range of error is in 5% left and right, cause the reason of this error to mainly contain following 3 aspects: the empirical equation based on relation between radiodiagnosis CT value and electron density exists error, hardening process during X ray process human body, the uncertainty of the X ray reading calibration bringing due to tissue complexity itself, 2 because image guidance system and therapy system are two complete equipments, also has certain error aspect the location of focus.
Nineteen sixty-eight, Koehler etc. have proposed range end imaging mode, imaging system layout as shown in Figure 2, employing be the direct transmission imaging system of proton.When this imaging mode has utilized proton to pass material, the characteristic at Bragg peak, is characterized in that longitudinal resolution is high, but in taking a picture, the thickness of sample must match with the range of proton, is only applicable to low energy proton and takes a picture.Up to now, directly transmission imaging technology is still in flourish, nowadays this technology also can be applicable to intermediate-energy puoton bundle, feature be can obtain proton and pass through object time can damage information, its application prospect is to utilize proton transmission imaging mode to realize image guiding, that is to say proton layer scanning technology (pCT), can overcome the deficiency of current CT image guiding, but this technology is due to the impact of multiple coulomb scattering, and spatial discrimination rate variance, is still not enough to replace CT guidance system.
In sum, in the process of present inventor's utility model technical scheme in realizing the embodiment of the present application, find that above-mentioned technology at least exists following technical problem:
In the prior art, because existing proton radiation therapy system is utilized X ray computer tomoscan (CT) imaging system, there is larger uncertainty in the range information that the X ray attenuation quotient that causes obtaining from CT image is converted to proton beam, range of error is in 5% left and right, because image guidance system and therapy system are two complete equipments, aspect the location of focus, also there is certain error, and proton layer scanning technology (pCT), when proton passes object, multiple coulomb scattering will cause the angular separation of incident proton beam, produce the impact of multiple coulomb scattering, cause spatial discrimination rate variance, so, there is the inaccurate error that exists of scanning in existing proton tomoscan method, the technical problem that spatial resolution is poor.
Utility model content
This utility model provides a kind of proton tomoscanning device, solve existing proton tomoscan method and had the inaccurate error that exists of scanning, the technical problem that spatial resolution is poor, realized manufacture tomoscan method scanning accurate scanning precision higher, error is less, and the higher technique effect of spatial resolution.
For solving the problems of the technologies described above, the embodiment of the present application provides a kind of proton tomoscanning device, and described device comprises:
Treatment head, described treatment head is used for utilizing treatment hair to penetrate proton beam;
Modulation matching module, described modulation matching module, for described proton beam being modulated to coupling shaping, makes described proton beam radiation on the predetermined position of object;
Magnetic lenses group, described magnetic lenses group is used for making described proton beam to realize 1:1 imaging;
Image capture module, described image capture module is for utilizing scintillator crystals and CCD camera to realize the Real-time Collection of image, wherein, described modulation matching module, described magnetic lenses group, described image capture module are all connected on same runing rest, and are followed successively by from top to bottom at vertical direction: described modulation matching module, described magnetic lenses group, described image capture module.
Wherein, described modulation matching module specifically comprises:
Diaphragm, described diaphragm is spacing for described proton beam is carried out, and the transverse emittance of described proton beam is limited in a preset range;
Rotation debuncher, described rotation debuncher is for increasing the cross dip of proton;
Two blocks of quadrupole electromagnets, described two blocks of quadrupole electromagnets are for realizing the linear modulation that proton beam lateral attitude and inclination angle are stated in described object place.
Wherein, described magnetic lenses group specifically comprises: four blocks of quadrupole electromagnets and beam-based device.
Wherein, described image capture module specifically comprises:
Scintillator crystals, described scintillator crystals is for making described proton beam realize 1:1 imaging on described scintillator crystals by magnetic lenses group;
CCD camera, described CCD camera is for realizing the Real-time Collection of image.
Wherein, described device also comprises: quadrupole electromagnet, deflection magnet, sweeping magnet.
The one or more technical schemes that provide in the embodiment of the present application, at least have following technique effect or advantage:
Owing to having adopted, first utilize treatment hair to penetrate proton beam, then described proton beam is modulated to coupling shaping, make described proton beam radiation on the predetermined position of object, then by magnetic lenses group, make described proton beam realize 1:1 imaging, finally utilize scintillator crystals and CCD camera to realize the technical scheme of the Real-time Collection of image, added magnetic lenses group to utilize magnetic lenses strong focusing principle to eliminate the impact of multiple coulomb scattering, and this bunch configuration adjustment is convenient, the incident proton that can adapt to different-energy, and also can realize the adjusting of picture contrast by Angle collimator, proton beam is modulated to coupling shaping, the imaging of proton beam and the Real-time Collection of realizing image are all on same runing rest, can whole imaging bunch be done as a whole, guarantee relation each other, guarantee easy to use and precision, so, efficiently solve existing proton tomoscan method and have the inaccurate error that exists of scanning, the technical problem that spatial resolution is poor, and then it is higher to have realized manufacture tomoscan method scanning accurate scanning precision, error is less, and the technique effect that spatial resolution is higher.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the proton tomoscan method in the embodiment of the present application one;
Fig. 2 is the direct transmission imaging principle schematic of the proton in the embodiment of the present application one;
Fig. 3 is the proton radiation therapy chamber layout in the embodiment of the present application one;
Fig. 4 is the proton tomoscanning device structure chart in the embodiment of the present application one;
Fig. 5 is proton and the matter interaction mechanism schematic diagram in the embodiment of the present application one;
Fig. 6 is the proton transmission imaging principle schematic based on magnetic lenses strong focusing principle in the embodiment of the present application one;
Fig. 7 is the imaging magnetic lenses group structural representation in the embodiment of the present application one;
Fig. 8 is the imaging bunch of the proton transmission imaging in the embodiment of the present application one;
Fig. 9 is the modulation coupling evolution diagram of the proton beam in the embodiment of the present application one;
Figure 10 is the tumor image that proton tomoscan imaging bunch obtains that passes through in the embodiment of the present application one;
Figure 11 is the structural representation of proton tomoscanning device in the embodiment of the present application one.
Wherein, 1-proton beam, 2-object, 3-imaging screen, 4-treats head, 5-therapeutic bed, 6-therapeutic room, 7-quadrupole electromagnet, 8-deflection magnet, 9-sweeping magnet, the outlet of 10-treatment head, 11-diaphragm, 12-rotates debuncher, 13-vacuum-tight window, 14-patient's (object), 15-runing rest, 16-beam-based device, 17-scintillator crystals, 18-CCD camera, the reaction of 19-ionization energy loss, 20-nuclear reaction, 21-Coulomb scattering, 22-Fourier plane, 23-horizontal focusing quadrupole electromagnet, 24-vertical focusing quadrupole electromagnet, 25-modulation coupling plastic section, 26-magnetic lenses group imaging session, 27-image is accepted section.
The specific embodiment
This utility model provides a kind of proton tomoscanning device, solve existing proton tomoscan method and had the inaccurate error that exists of scanning, the technical problem that spatial resolution is poor, realized manufacture tomoscan method scanning accurate scanning precision higher, error is less, and the higher technique effect of spatial resolution.
Technical scheme during the application implements is for solving the problems of the technologies described above.General thought is as follows:
First utilize treatment hair to penetrate proton beam, then described proton beam is modulated to coupling shaping, make described proton beam radiation on the predetermined position of object, then by magnetic lenses group, make described proton beam realize 1:1 imaging, finally utilize scintillator crystals and CCD camera to realize the technical scheme of the Real-time Collection of image, added magnetic lenses group to utilize magnetic lenses strong focusing principle to eliminate the impact of multiple coulomb scattering, and this bunch configuration adjustment is convenient, the incident proton that can adapt to different-energy, and also can realize the adjusting of picture contrast by Angle collimator, proton beam is modulated to coupling shaping, the imaging of proton beam and the Real-time Collection of realizing image are all on same runing rest, can whole imaging bunch be done as a whole, guarantee relation each other, guarantee easy to use and precision, so, efficiently solve existing proton tomoscan method and have the inaccurate error that exists of scanning, the technical problem that spatial resolution is poor, and then it is higher to have realized manufacture tomoscan method scanning accurate scanning precision, error is less, and the technique effect that spatial resolution is higher.
In order better to understand technique scheme, below in conjunction with Figure of description and concrete embodiment, technique scheme is described in detail.
Embodiment mono-:
In embodiment mono-, a kind of proton tomoscan method is provided, please refer to Fig. 1-Figure 10, described method comprises:
S10, utilizes treatment hair to penetrate proton beam;
S20, modulates coupling shaping to described proton beam, makes described proton beam radiation on the predetermined position of object;
S30, makes described proton beam realize 1:1 imaging by magnetic lenses group;
S40, utilizes scintillator crystals and CCD camera to realize the Real-time Collection of image.
Wherein, in the embodiment of the present application, described to described proton beam modulate coupling shaping specifically comprise:
First, utilize diaphragm to carry out described proton beam spacing, the transverse emittance of described proton beam is limited in a preset range;
Then, utilize debuncher to increase the cross dip of proton;
Finally, utilize two blocks of quadrupole electromagnets to realize the linear modulation that proton beam lateral attitude and inclination angle are stated in described object place.
Wherein, in the embodiment of the present application, describedly by magnetic lenses group, make described proton beam realize 1:1 imaging to be specially: by the magnetic lenses group being formed by four blocks of quadrupole electromagnets and beam-based device, make described proton beam realize 1:1 imaging.
Wherein, in the embodiment of the present application, the described Real-time Collection that utilizes scintillator crystals and CCD camera to realize image specifically comprises:
First, by magnetic lenses group, make described proton beam on scintillator crystals, realize 1:1 imaging;
Then, by CCD camera, realize the Real-time Collection of image.
Wherein, in the embodiment of the present application, described imaging and the described Real-time Collection of realizing image that described proton beam is modulated to coupling shaping, described proton beam all carries out on same runing rest.
Wherein, in actual applications, be illustrated in figure 3 proton radiation therapy chamber layout, core component is treatment head, rotatable bunch and runing rest, consists of.Conformal therapy comprehensive to focus for realizing, multi-angle, treatment head comprises scattering object, collimator, conformal device, compensator, metering detector, deflection magnet, focusing quadrupole magnet and sweeping magnet etc., and light path is very complicated.The proton tomoscan bunch of the embodiment of the present application, by utilizing the proton beam of drawing from treatment head to carry out imaging, that is to say at the end for the treatment of head and sets up a proton transmission imaging bunch.When carrying out proton radiation therapy, imaging bunch no power, does not affect Patients During Radiotherapy; When carrying out the guiding of pCT image, imaging bunch can normal power-up work.Be the schematic diagram of a kind of conventional " debunching pattern " treatment head as shown in Figure 4, at its end, added proton transmission imaging bunch can realize pCT function.
To design principle and the method for proton transmission imaging bunch be described in detail below.
The mechanism of proton and matter interaction as shown in Figure 5, comprise: 1 with the interaction of electron outside nucleus: proton loses its energy in ionization mode when through medium, ionization reaction refers to that incident proton passes to electron outside nucleus by its portion of energy, make medium atom produce ionization or excite and off-energy (ionization energy loss), this reaction can represent with Bethe-Block formula; 2 with the interaction of core Coulombian field: when proton is during by medium, incident proton will be subject to the interaction of atomic nucleus electric field, the track of incident proton will be subject to the deflection of nuclear power plant, and this process is called Coulomb scattering, and this reacts available Molliere formula and well describes; 3 and nuclear strong interaction: the strong interaction between incident proton and atomic nucleus (that is to say nuclear reaction) comprises core elastic scattering, quasi-elastic scattering and inelastic scattering.
When proton passes object, multiple coulomb scattering will cause the angular separation of incident proton beam, if adopt the direct transmission imaging layout of Fig. 2, the image of acquisition will produce serious image blur.For overcoming the problems referred to above, can utilize magnetic lenses group that the proton beam scattering is converged to obtain image clearly again.The main cause that can so do is because proton is charged, can utilize electromagnetic field to carry out deflection and focusing to it.
Shown in Fig. 6, be the proton transmission imaging principle schematic based on magnetic lenses strong focusing principle, be characterized in that proton is irrelevant at position and its initial angle of picture plane, so just substantially eliminated the impact of Coulomb scattering.The geometric optical imaging of this situation and convex lens is similar, belongs to object point picture point point-to-point imaging system one to one.This Magnet combination also has a feature, the position of the center proton and its initial position are irrelevant, only be decided by the angle of initially faling apart, so just formed a Fourier plane, as shown in Figure 6, in the proton arrival Fourier plane at large loose angle, away from the position of bundle axle, the proton at little loose angle arrives the position near bundle axle.Like this, be placed on the ability that beam-based device in Fourier plane just has angle Selection.Further analyze, proton is relevant with the material properties (cascade unit) of object through the Coulomb scattering angle of object, so utilize Fourier plane also can determine the character of object.
The structural representation of imaging magnetic lenses group as shown in Figure 7, by two identical FODO unit, formed, FODO unit is exactly a kind of arrangement mode of Magnet, be specially the combination of a horizontal focusing Magnet+mono-section drift section+mono-vertical focusing Magnet+mono-section drift section, spacing represents with L and S, and F represents horizontal focusing quadrupole electromagnet, and D represents vertical focusing quadrupole electromagnet, O represents drift section, and the transmission matrix of one of them FODO unit can be expressed as c:
(1)
Wherein,
frepresent the focusing length of quadrupole electromagnet.The transmission matrix of whole magnetic lenses group can be expressed as:
(2)
Wherein,
represent matrix
order,
determinant
.If
, that is to say and work as
time, satisfy condition
,
for cell matrix, so just can realize some some imaging.
Suppose that initial coordinate is
proton pass through after object, due to scattering effect, the coordinate of particle becomes
, here
represent the loose angle that multiple coulomb scattering causes.The lateral attitude of this proton in Fourier plane is like this:
(3)
Initial position and the initial angle of supposing proton meet linear relationship, that is to say:
and
(4)
Wherein
represent correlation coefficient, this up-to-date style (3) can be expressed as:
(5)
Can find out, the lateral attitude of Fourier plane place proton is only directly proportional to angle of scattering, by placing transversal collimation device, just can realize angle-resolved.
Consider that proton can follow the loss of momentum in passing through object process
, lateral attitude when this particle finally reaches imaging screen is:
(6)
For this magnetic lenses group, the quadratic term of transmission matrix meets following relational expression:
(7)
Convolution (4), formula (6), formula (7), the final position of particle is:
(8)
Wherein,
representative color differential mode is stuck with paste, with angle of scattering
and momentum spread
directly related.
From above-mentioned derivation, can find out, by the strong-focusing magnetic lenses group shown in Fig. 7, the image blur of proton transmission imaging can significantly reduce, and single order aberration is eliminated completely, second order aberration is most of to be eliminated, and can principle, significantly promote the lateral resolution of proton transmission imaging.
By the imaging magnetic lenses group shown in Fig. 6, Fig. 7, can realize a some imaging, but initial line is had to 2 requirements: the 1 starting point line at magnetic lenses group imaging session meets the restrictive condition of formula (4), that is to say that the initial position of proton and initial angle meet linear relationship; 2 line lateral dimensions are enough large, can illuminate whole visual field.For realizing above-mentioned requirements, must add in magnetic lenses group imaging session the place ahead line modulation matching section, as shown in Figure 8.In addition, in order to realize the image acquisition of proton beam, at the end of proton transmission imaging bunch, added image to accept section, utilized scintillator (as LSO crystal) that proton images is converted to optical signal, then collect by CCD camera.
Utilize special magnetic lenses group can significantly reduce the image blur that scattering causes, but incident proton is had to very strong restrictive condition, in service at actual accelerator, this condition is difficult to realize.The way that modulation matching section is realized this condition is that debuncher (foil) passes in the bundle group (being guaranteed by small-bore diaphragm) that makes transverse emittance minimum, after proton cross dip is significantly increased, again through one section of matching section, so just can realize the modulation at lateral displacement and inclination angle, as shown in Figure 9, wherein in Fig. 9, the left side is that proton beam passes through before debuncher, mid portion is that proton beam passes through after debuncher, right-hand component is that proton beam arrives modulation matching section end, as can be seen from Figure 9, proton beam is after ovennodulation matching section, the lateral attitude of proton beam and inclination angle are substantially proportional, and the lateral dimension of line is also expanded, can cover whole visual field.
For example the proton tomoscan of the embodiment of the present application is introduced below, wherein, an actual design is as shown in table 1, table 1 is the parameter configuration of proton tomoscan bunch, wherein, proton beam energy is 325MeV, and the reduced length of knub position is 32.4g/cm
2, tumor shape is the circle of radius 10mm, the reduced length of tumor periphery is 29.7g/cm
2, approach with normal condition.Figure 10 shows that the tumor image obtaining by this imaging bunch, this clear picture ground has reflected shape and the position of tumor.
Table 1 proton tomoscan bunch major parameter
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
Owing to having adopted, first utilize treatment hair to penetrate proton beam, then described proton beam is modulated to coupling shaping, make described proton beam radiation on the predetermined position of object, then by magnetic lenses group, make described proton beam realize 1:1 imaging, finally utilize scintillator crystals and CCD camera to realize the technical scheme of the Real-time Collection of image, added magnetic lenses group to utilize magnetic lenses strong focusing principle to eliminate the impact of multiple coulomb scattering, and this bunch configuration adjustment is convenient, the incident proton that can adapt to different-energy, and also can realize the adjusting of picture contrast by Angle collimator, proton beam is modulated to coupling shaping, the imaging of proton beam and the Real-time Collection of realizing image are all on same runing rest, can whole imaging bunch be done as a whole, guarantee relation each other, guarantee easy to use and precision, so, efficiently solve existing proton tomoscan method and have the inaccurate error that exists of scanning, the technical problem that spatial resolution is poor, and then it is higher to have realized manufacture tomoscan method scanning accurate scanning precision, error is less, and the technique effect that spatial resolution is higher.
Method in corresponding embodiment mono-, embodiment mono-also provides a kind of proton tomoscanning device, please refer to Figure 11 and Fig. 4, and described device 10 comprises:
Treatment 4, described treatment head is used for utilizing treatment hair ejaculation proton beam;
Modulation matching module 101, described modulation matching module, for described proton beam being modulated to coupling shaping, makes described proton beam radiation on the predetermined position of object;
Magnetic lenses group 102, described magnetic lenses group is used for making described proton beam to realize 1:1 imaging;
Image capture module 103, described image capture module is for utilizing scintillator crystals and CCD camera to realize the Real-time Collection of image, wherein, described modulation matching module 101, described magnetic lenses group 102, described image capture module 103 are all connected on same runing rest 15, and are followed successively by from top to bottom at vertical direction: described modulation matching module 101, described magnetic lenses group 102, described image capture module 103.
Wherein, in the embodiment of the present application, described modulation matching module 101 specifically comprises:
Diaphragm 11, described diaphragm 11 is spacing for described proton beam is carried out, and the transverse emittance of described proton beam is limited in a preset range;
Rotation debuncher 12, described rotation debuncher 12 is for increasing the cross dip of proton;
Two blocks of quadrupole electromagnets, described two blocks of quadrupole electromagnets are for realizing the linear modulation that proton beam lateral attitude and inclination angle are stated in described object place.
Wherein, in the embodiment of the present application, described magnetic lenses group 102 specifically comprises: four blocks of quadrupole electromagnets and beam-based device 16.
Wherein, in the embodiment of the present application, described image capture module 103 specifically comprises:
Scintillator crystals 17, described scintillator crystals 17 is for making described proton beam realize 1:1 imaging on described scintillator crystals by magnetic lenses group 102;
CCD camera 18, described CCD camera 18 is for realizing the Real-time Collection of image.
Wherein, in the embodiment of the present application, described modulation matching module 101, described magnetic lenses group 102, described image capture module 103 are all connected on same runing rest 15.
Wherein, in actual applications, please refer to Fig. 4, treatment 4 is to be fixed on a discharger, described discharger is by quadrupole electromagnet 7, deflection magnet 8, sweeping magnet 9 connects to form successively, and be positioned at treatment head, export being followed successively by of 10 belows: diaphragm 11, rotation debuncher 12, vacuum-tight window 13, patient's (object) 14, runing rest 15, beam-based device 16, scintillator crystals 17, CCD camera 18, wherein, vacuum-tight window 13, patient's (object) 14, beam-based device 16, scintillator crystals 17, CCD camera 18 is all fixed on runing rest 15, and patient's (object) 14 is placed on therapeutic bed 5, therapeutic bed 5 is positioned on runing rest 15 equally, wherein, at vertical direction, be followed successively by from top to bottom: diaphragm 11, rotation debuncher 12, vacuum-tight window 13, patient's (object) 14, therapeutic bed 5, beam-based device 16, scintillator crystals 17, CCD camera 18.
Technical scheme in above-mentioned the embodiment of the present application, at least has following technique effect or advantage:
Owing to having adopted, first utilize treatment hair to penetrate proton beam, then described proton beam is modulated to coupling shaping, make described proton beam radiation on the predetermined position of object, then by magnetic lenses group, make described proton beam realize 1:1 imaging, finally utilize scintillator crystals and CCD camera to realize the technical scheme of the Real-time Collection of image, added magnetic lenses group to utilize magnetic lenses strong focusing principle to eliminate the impact of multiple coulomb scattering, and this bunch configuration adjustment is convenient, the incident proton that can adapt to different-energy, and also can realize the adjusting of picture contrast by Angle collimator, proton beam is modulated to coupling shaping, the imaging of proton beam and the Real-time Collection of realizing image are all on same runing rest, can whole imaging bunch be done as a whole, guarantee relation each other, guarantee easy to use and precision, so, efficiently solve existing proton tomoscan method and have the inaccurate error that exists of scanning, the technical problem that spatial resolution is poor, and then it is higher to have realized manufacture tomoscan method scanning accurate scanning precision, error is less, and the technique effect that spatial resolution is higher.
Although described preferred embodiment of the present utility model, once those skilled in the art obtain the basic creative concept of cicada, can make other change and modification to these embodiment.So claims are intended to all changes and the modification that are interpreted as comprising preferred embodiment and fall into this utility model scope.
Obviously, those skilled in the art can carry out various changes and modification and not depart from spirit and scope of the present utility model this utility model.Like this, if within of the present utility model these are revised and modification belongs to the scope of this utility model claim and equivalent technologies thereof, this utility model is also intended to comprise these changes and modification interior.
Claims (5)
1. a kind of proton tomoscanning device, is characterized in that, described device comprises:
Treatment head, described treatment head is used for utilizing treatment hair to penetrate proton beam;
Modulation matching module, described modulation matching module, for described proton beam being modulated to coupling shaping, makes described proton beam radiation on the predetermined position of object;
Magnetic lenses group, described magnetic lenses group is used for making described proton beam to realize 1:1 imaging;
Image capture module, described image capture module is for utilizing scintillator crystals and CCD camera to realize the Real-time Collection of image, wherein, described modulation matching module, described magnetic lenses group, described image capture module are all connected on same runing rest, and are followed successively by from top to bottom at vertical direction: described modulation matching module, described magnetic lenses group, described image capture module.
2. device according to claim 1, is characterized in that, described modulation matching module specifically comprises:
Diaphragm, described diaphragm is spacing for described proton beam is carried out, and the transverse emittance of described proton beam is limited in a preset range;
Rotation debuncher, described rotation debuncher is for increasing the cross dip of proton;
Two blocks of quadrupole electromagnets, described two blocks of quadrupole electromagnets are for realizing the linear modulation that proton beam lateral attitude and inclination angle are stated in described object place.
3. device according to claim 1, is characterized in that, described magnetic lenses group specifically comprises: four blocks of quadrupole electromagnets and beam-based device.
4. device according to claim 1, is characterized in that, described image capture module specifically comprises:
Scintillator crystals, described scintillator crystals is for making described proton beam realize 1:1 imaging on described scintillator crystals by magnetic lenses group;
CCD camera, described CCD camera is for realizing the Real-time Collection of image.
5. device according to claim 1, is characterized in that, described device also comprises: quadrupole electromagnet, deflection magnet, sweeping magnet.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404183A (en) * | 2018-04-26 | 2019-11-05 | 株式会社日立制作所 | Particle beam irradiating apparatus and particle therapy system |
| CN111686377A (en) * | 2020-06-16 | 2020-09-22 | 中国科学院近代物理研究所 | Carbon ion beam superconducting rotating Gantry |
| CN113970567A (en) * | 2020-07-22 | 2022-01-25 | 同方威视技术股份有限公司 | Back scattering imaging device, control method and inspection system |
| CN116087244A (en) * | 2023-04-06 | 2023-05-09 | 之江实验室 | Multi-material diagnosis method, device and application |
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2014
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404183A (en) * | 2018-04-26 | 2019-11-05 | 株式会社日立制作所 | Particle beam irradiating apparatus and particle therapy system |
| CN110404183B (en) * | 2018-04-26 | 2021-06-08 | 株式会社日立制作所 | Particle beam irradiation device and particle beam therapy system |
| CN111686377A (en) * | 2020-06-16 | 2020-09-22 | 中国科学院近代物理研究所 | Carbon ion beam superconducting rotating Gantry |
| CN113970567A (en) * | 2020-07-22 | 2022-01-25 | 同方威视技术股份有限公司 | Back scattering imaging device, control method and inspection system |
| CN116087244A (en) * | 2023-04-06 | 2023-05-09 | 之江实验室 | Multi-material diagnosis method, device and application |
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