CN203909313U - Multi-energy spectrum static CT apparatus - Google Patents
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Abstract
The utility model discloses a multi-energy spectrum static CT apparatus which includes a multi-point distributed type ray generating device, multiple rows of detectors, a data acquisition device, a baggage transfer and control device and a multi-energy projection data processing device. The utility model aims to combine a static CT scan mode with multi-energy spectrum analysis technology, so the multi-energy spectrum static CT apparatus can retain original advantages of static CT, such as high scanning speed, simple mechanical structure, less slip rings and low detector cost, can also achieve identification of material composition, and has a very high practical value in occasions such as security checks, custom suppress smuggling and so forth.
Description
Technical field
The utility model relates to radiant image detection technique field, relates in particular to the static CT equipment of multi-power spectrum.
Background technology
CT technology, owing to can eliminating the impact of overlapped object, has been brought into play vital role in the occasions such as safety inspection.Traditional CT adopts slip-ring device to obtain the data for projection in different angles by the rotation of X source and detector, obtains faultage image by method for reconstructing, thereby obtains the internal information of detected luggage and articles.Multi-power spectrum analysis refers to and utilizes certain material to differentiate this material to the difference in the X ray absorptive character of different-energy.CT technology coordinates multi-power spectrum analytical technology, current luggage and articles checkout facility can be rebuild atomic number and the electron density of optional position, analyte inside, realize the identification of substance classes, in the detection such as explosive, drugs, played good effect.
But because existing CT device conventionally adopts slip ring rotation in data acquisition, not only sweep velocity is limited, bulky, and machining accuracy requirement is high, cost is higher, has limited its widespread use in practice.In recent years, carbon nano-tube X-ray tube technology had entered practical field.Different from conventional light source, it need not utilize high temperature to produce ray, but produces cathode ray according to carbon nano-tube point discharge principle, practices shooting and produces X-ray.Its advantage is opening and closing fast, and volume is less.This X source is arranged into ring-type, carries out the irradiation to object under different angles, just can make " static CT " without rotation, greatly improve the speed of radial imaging, owing to having saved the structure of slip ring, provide cost savings simultaneously, be of great significance for field tools such as safety inspections.
Through inquiry to document and patent, not yet find the report of the static CT technology of integrated application and multi-power spectrum analytical technology in radiation image-forming system at present.Existing static CT system is monoenergetic system, only can reconstruct the linear attenuation coefficient of analyte inside, has greatly limited its recognition capability.And if adopt multi-power spectrum technology, the static CT system that realizes multi-power spectrum is faced with some practical difficulties.On the one hand, existing CT device often adopts single energy X source to add multipotency detector in order to realize multi-power spectrum analysis, the detector front and back of surveying different-energy X ray are placed, ray is introduced into be surveyed compared with the detector of low-energy X-ray, enters the detector of surveying higher-energy X ray after power spectrum shaping.The dual intensity detector 120 and 130 that Fig. 1 has illustrated slip ring CT to adopt single energy X source 110 to add front and back placement is realized the method for energy spectrum analysis, light source and detector can rotate with slip ring, detector does not need to cover very wide-angle, low energy detector 120 and high energy detector 130 that any ray passes are all one to one, are easy to carry out multi-power spectrum analysis accurately.And static CT has cancelled slip ring structure employing distributed light source 210, the very large angular range of detector 220 and 230 needs covering is even arranged into the form of annulus, as shown in Figure 2.If the multipotency detector 220 and 230 of placing before and after adopting like this will cause ray oblique fire problem, and the ray of different angles oblique fire degree is different.Oblique fire has not only brought the difficulty of high low energy Registration of Measuring Data, also can aggravate crosstalking between adjacent detector, causes the resolution of rebuilding image to decline.
On the other hand, existing CT realizes the another kind of method of also normal use that multi-power spectrum is analyzed, adopt multipotency X source to add monoenergetic detector, between multiple energy, switching at a high speed the scanning of obtaining under different-energy by X source in slip ring rotary course, but this method also exists intrinsic deficiency.When X source switches between multiple energy, slip ring is at High Rotation Speed, cause existing between high low energy data the deviation of projection angle, the frequency of switching when X source energy is when higher, this deviation generally compared with I to ignore, if and this method is applied to static CT, need X source adjacent in multiple sources to be set to different energy, quantity for the consideration X source of the factor such as cost, technique can not be very many, therefore the projection angle deviation between high low energy data cannot be ignored, and affect the precision that multi-power spectrum is analyzed.
Utility model content
For one or more problems of the prior art, the static CT equipment of a kind of multi-power spectrum is proposed.
Aspect one of the present utility model, the static CT equipment of a kind of multi-power spectrum has been proposed, comprising: connecting gear, carrying inspected object rectilinear motion, distributed source, comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object, sniffer, comprise first row detector and the second row detector adjacent with described first row detector in the direction of motion of described inspected object, described first row detector comprises multiple probe units with the first energy response, be arranged in parallel plane the first plane with described distributed source, reception penetrates the X ray of described inspected object, described second row detector comprises multiple probe units with the second energy response, be arranged in parallel plane the second plane with described distributed source, reception penetrates the X ray of described inspected object, harvester, is connected with described sniffer, and the X ray that described first row detector is surveyed is converted to the first digital signal, and the X ray that described second row detector is surveyed is converted to the second digital signal, treating apparatus, is connected with described harvester, based on the CT image of described the first digital signal and described the second digital signal reconstruction inspected object.
Preferably, in described first row detector and described second row detector, one of at least there is filter plate.
Preferably, each ray source point is specially carbon nano-tube X-ray tube.
Preferably, described sniffer is also included in the 3rd row's detector adjacent with described second row detector in the direction of motion of described inspected object, described the 3rd row's detector comprises multiple probe units with the third energy response, be arranged in parallel plane the 3rd plane with described distributed source, receive the X ray that penetrates described inspected object; The X ray that described harvester is surveyed described the 3rd row's detector is converted to three digital signal, and the X ray that described the 3rd row's detector is surveyed is converted to three digital signal; Described treating apparatus is rebuild the CT image of inspected object based on described the first digital signal, described the second digital signal and described three digital signal.
On the other hand of the present utility model, the static CT equipment of a kind of multi-power spectrum has been proposed, comprising: connecting gear, carrying inspected object rectilinear motion; The first scanning stage, comprise: the first distributed source, comprise multiple ray source points, described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, send X ray at least partly around described inspected object, and towards described inspected object; First row detector, comprises multiple probe units with the first energy response, is arranged in parallel plane the first plane with described the first distributed source, receives the X ray that penetrates described inspected object; The second scanning stage, along the setting of connecting with described the first scanning stage of the direction of motion of described inspected object, described the second scanning stage comprises: the second distributed source, comprise multiple ray source points, described multiple ray source point is arranged in the plane vertical with the direction of motion of inspected object, send X ray at least partly around described inspected object, and towards described inspected object; Second row detector, comprises multiple probe units with the second energy response, is arranged in parallel plane the second plane with described the second distributed source, receives the X ray that penetrates described inspected object; Harvester, is connected with described first row detector and described second row detector, and the X ray that described first row detector is surveyed is converted to the first digital signal, and the X ray that described second row detector is surveyed is converted to the second digital signal; Treating apparatus, is connected with described harvester, based on the CT image of described the first digital signal and described the second digital signal reconstruction inspected object.
Propose the static CT equipment of a kind of multi-power spectrum more on the one hand of the present utility model, having comprised: connecting gear, carrying inspected object rectilinear motion; The first scanning stage, comprise: the first distributed source, comprise multiple ray source points, described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, send X ray at least partly around described inspected object, and towards described inspected object; First row detector, comprises multiple probe units with the first energy response, is arranged in parallel plane the first plane with described the first distributed source, receives the X ray that penetrates described inspected object; Second row detector, comprises multiple probe units with the second energy response, is arranged in parallel plane the second plane with described the first distributed source, receives the X ray that penetrates described inspected object; The second scanning stage, along the setting of connecting with described the first scanning stage of the direction of motion of described inspected object, described the second scanning stage comprises: the second distributed source, comprise multiple ray source points, described multiple ray source point is arranged in the plane vertical with the direction of motion of inspected object, send X ray at least partly around described inspected object, and towards described inspected object; The 3rd row's detector, comprises multiple probe units with the first energy response, is arranged in parallel plane the 3rd plane with described the second distributed source, receives the X ray that penetrates described inspected object; The 4th row's detector, comprises multiple probe units with the second energy response, is arranged on the parallel plane Siping City face with described the second distributed source, receives the X ray that penetrates described inspected object; Harvester, be connected with described first row detector, described second row detector, described the 3rd row's detector device and described the 4th row's detector, the X ray that described first row detector is surveyed is converted to the first digital signal, the X ray that described second row detector is surveyed is converted to the second digital signal, the X ray that described the 3rd row's detector is surveyed is converted to three digital signal, and the X ray that described the 4th row's detector is surveyed is converted to the 4th digital signal; Treating apparatus, is connected with described harvester, rebuilds the CT image of inspected object based on one of described the first digital signal, described the second digital signal, described three digital signal and described the 4th digital signal.
Preferably, described the first scanning stage is also included in the 5th row's detector adjacent with described second row detector in the direction of motion of described inspected object, described the 5th row's detector comprises multiple probe units with the third energy response, be arranged in parallel plane the 3rd plane with described distributed source, receive the X ray that penetrates described inspected object;
Described the second scanning stage is also included in the 6th row's detector adjacent with described the 4th row's detector in the direction of motion of described inspected object, described the 6th row's detector comprises multiple probe units with the third energy response, be arranged on the parallel plane Siping City face with described distributed source, receive the X ray that penetrates described inspected object;
The X ray that described harvester is surveyed the described the 5th and the 6th row's detector is converted to the 5th and the 6th digital signal;
Described treating apparatus is rebuild the CT image of inspected object based on the described first to the 6th digital signal.
According to the static CT system of above-mentioned multi-power spectrum, solve multi-power spectrum analytical technology has been applied to the problems referred to above that static CT faces, thereby do not needed slip ring rotation can obtain fast accurately complete multipotency data for projection.In addition, this system can reconstruct atomic number and the electron density image of analyte, and picture quality is better, contraband goods recognition capability is stronger, cost is lower.
Brief description of the drawings
In order better to understand the utility model, will be described embodiment of the present utility model according to the following drawings:
Fig. 1 is the schematic diagram of the slip ring structure of existing CT equipment;
Fig. 2 is the schematic diagram of the slip ring structure of existing dual intensity CT equipment;
Fig. 3 is according to the structured flowchart of the CT equipment of the utility model one embodiment;
Fig. 4 A is according to the structural representation of the CT equipment of the utility model one embodiment;
Fig. 4 B is the side view of scanning stage in CT equipment as shown in Figure 4 A;
Fig. 5 is according to the structural representation of the CT equipment of another embodiment of the utility model;
Fig. 6 is according to the structural representation of the CT equipment of the another embodiment of the utility model.
Accompanying drawing does not show all structures of embodiment.Run through institute's identical Reference numeral of drawings attached and represent same or analogous parts or feature.
Embodiment
To describe specific embodiment of the utility model below in detail, it should be noted that the embodiments described herein, only for illustrating, is not limited to the utility model.In the following description, in order to provide thorough understanding of the present utility model, a large amount of specific detail have been set forth.But, it is evident that for those of ordinary skill in the art: needn't adopt these specific detail to carry out the utility model.In other examples, for fear of obscuring the utility model, do not specifically describe known circuit, material or method.
In whole instructions, " embodiment ", " embodiment ", " example " or mentioning of " example " are meaned: special characteristic, structure or characteristic in conjunction with this embodiment or example description are comprised at least one embodiment of the utility model.Therefore, differ and establish a capital the same embodiment of finger or example in each local phrase " in one embodiment ", " in an embodiment ", " example " or " example " occurring of whole instructions.In addition, can with any suitable combination and/or sub-portfolio by specific feature, structure or property combination in one or more embodiment or example.In addition, it should be understood by one skilled in the art that the accompanying drawing providing at this is all for illustrative purposes, and accompanying drawing not necessarily in proportion draw.Should be appreciated that when claiming element " to be couple to " or when " being connected to " another element, it can be directly couple or be couple to another element or can have intermediary element.On the contrary, when claiming element " to be directly coupled to " or when " being directly connected to " another element, not having intermediary element.Identical Reference numeral is indicated identical element.Term "and/or" used herein comprises any and all combinations of one or more relevant projects of listing.
In order to solve the problems referred to above of the static CT system of multi-power spectrum, for example do not need slip ring rotation can obtain fast accurately complete multipotency data for projection, embodiment of the present utility model has proposed the static CT equipment of a kind of multi-power spectrum, as shown in Figure 3.This equipment comprises: connecting gear 32, distributed source 31, sniffer 33, harvester 34 and treating apparatus 35.Connecting gear 32 carries inspected object rectilinear motion.
Distributed source 31 comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object.For example, each ray source point is specially carbon nano-tube X-ray tube.
In certain embodiments, distributed source 31 is made up of multiple distributed X sources, the going out beam energy and can set of each X source, the going out Shu Shunxu and can set of X source.X source is arranged in one or more planes, and the X source in each plane is considered as one group.X source is on the same group set as the identical beam energy that goes out, and X source is not on the same group set as the different beam energies that goes out.X source can be arranged as continuous or discrete multistage straight line or camber line, but arranging of every group of X source is identical, and ensureing does not have projection angle deviation between multi-energy data.
Sniffer 33 comprises first row detector and the second row detector adjacent with described first row detector in the direction of motion of described inspected object, described first row detector comprises multiple probe units with the first energy response, be arranged in parallel plane the first plane with described distributed source, reception penetrates the X ray of described inspected object, described second row detector comprises multiple probe units with the second energy response, be arranged in parallel plane the second plane with described distributed source, reception penetrates the X ray of described inspected object.
In certain embodiments, the corresponding one group of multi-detector of plane that each X source is arranged, the probe unit of each row's detector can be arranged as continuous or discrete multistage straight line or camber line, detector each row be arranged in parallel along the direction of motion of analyte, avoided placing before and after directions of rays the ray oblique fire problem causing.Each row's probe unit of multi-detector can be by means of the mode of different detecting materials or thickness or the different filter plates of detector front, realizes the detection (X ray energy range be 0 to the setting value that goes out beam energy) of the different-energy response of the X ray that this group X source is launched.For example, in first row detector and second row detector, one of at least there is filter plate.The first energy response mainly responds the low-energy component in X ray, the second energy response mainly responds the high-energy component in X ray, and described treating apparatus is rebuild high energy attenuation coefficient images and the low energy attenuation coefficient images of described inspected object based on described the first digital signal and described the second digital signal.Because X source on the same group is not set to the different beam energies that goes out, the multi-detector of corresponding 2 groups and above X source just can be surveyed more energy range and energy section, obtains more accurately meticulous multi-power spectrum analysis result.
In certain embodiments, in first row detector and second row detector, one of at least there is filter plate.
Harvester 34 is connected with described sniffer 33, and the X ray that described first row detector is surveyed is converted to the first digital signal, and the X ray that described second row detector is surveyed is converted to the second digital signal.Harvester 34 carries out high-speed sampling and is converted to digital signal the electric signal of all probe unit outputs, is sent to treating apparatus 35.
Treating apparatus 35 is connected with described harvester 34, based on the CT image of described the first digital signal and described the second digital signal reconstruction inspected object.For example, treating apparatus 35 is rebuild atomic number numerical value and the electron density value of described inspected object based on described the first digital signal and the second digital signal.
In addition, in certain embodiments, luggage connecting gear and control device are responsible for transmitting analyte by the imaging region being surrounded by distributed source, sniffer and harvester, control each X source and go out beam energy and go out to restraint sequential working by what set, control multi-detector and data collector and carry out high-speed sampling according to the time interval or the outer triggering signal set.
Use the system of 2 groups and above X source to need the Registration of Measuring Data problem of the multiple imaging surfaces of extra process, luggage transmission and control device can provide for every group of sampling location index or the time index of analyte, pass through the mistiming of several imaging surfaces in conjunction with the distance between several imaging surfaces or analyte, data processing equipment just can extract the multipotency data for projection of registration.
Treating apparatus 35 is responsible for reconstructing three-dimensional atomic number image and the electron density image of analyte from multipotency data for projection.
Taking dual intensity data for projection as example, the high low energy data for projection that obtains scanning from dual intensity detector is denoted as p
1and p
2.First data are carried out to pre-service and correction, such as background and gain calibration, the correction of detector bad track etc.Then adopt sill decomposition method to carry out dual intensity decomposition to the fan-beam projection data that obtain after resetting, decompose the dual intensity coefficient of dissociation A under different substrate materials material
1and A
2, use respectively CT reconstruction algorithm to rebuild to these two coefficients, obtain reconstructed results a
1and a
2.Afterwards, solve atomic number Z and electron density ρ according to following formula
edistribution Value:
ρ
e＝a
1ρ
e1+a
2ρ
e2 (2)
In this formula, Z
1and Z
2be respectively the atomic number numerical value of two kinds of sills, ρ
e1and ρ
e2be respectively the electron density value of two kinds of sills.In above-mentioned dual intensity method for reconstructing, first data for projection is decomposed, rebuild again, therefore also claim that these class methods are pre-processing algorithm, in addition also can realize with post-processing approach, first high low energy data for projection is carried out respectively to CT reconstruction, the higher low energy attenuation coefficient images Calculating material information distributing plan picture obtaining according to reconstruction, this method possesses conventionally calculates simple and quick advantage, in sweep object changes in material scope hour, aftertreatment method for reconstructing can obtain higher precision.
Fig. 4 A is according to the structural representation of the CT equipment of the utility model one embodiment.Fig. 4 B is the side view of scanning stage in CT equipment as shown in Figure 4 A.
As shown in Figure 4 A and 4 B shown in FIG., the static CT imaging system of multi-power spectrum shown in this example has been used the X source A of 1 distribution type, all X sources of distributed X source A are set the identical beam energy that goes out, in the parallel plane that is distributed in 2 next-door neighbours of 2 row's detector corresponding with distributed X source A, be respectively high-energy detector B and low-yield detector C.
Fig. 5 is according to the structural representation of the CT equipment of another embodiment of the utility model.As shown in Figure 5, the static CT imaging system of the multi-power spectrum shown in this example comprises two scanning stages, and the first scanning stage and the second scanning stage are used respectively distributed X source A and distributed X source D.Arranging of the X source of distributed X source A and D is identical, and all X sources of distributed X source A are set the identical beam energy that goes out, and all X sources of distributed X source D are set the identical beam energy that goes out, and it is different that the X source of distributed X source A and D goes out beam energy.Be distributed in 2 planes in parallel with E of 2 row detector B, corresponding with distributed X source A and distributed X source D respectively.
In this embodiment, connecting gear 32 carries inspected object rectilinear motion.The first scanning stage comprises the first distributed source and first row detector.The first distributed source, comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object.First row detector comprises multiple probe units with the first energy response, is arranged in parallel plane the first plane with described the first distributed source, receives the X ray that penetrates described inspected object.
The second scanning stage is along the setting of connecting with described the first scanning stage of the direction of motion of described inspected object, and described the second scanning stage comprises the second distributed source and second row detector.
The second distributed source comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object; Second row detector, comprises multiple probe units with the second energy response, is arranged in parallel plane the second plane with described the second distributed source, receives the X ray that penetrates described inspected object.
In this embodiment, harvester 34 is connected with described first row detector and described second row detector, the X ray that described first row detector is surveyed is converted to the first digital signal, and the X ray that described second row detector is surveyed is converted to the second digital signal.Treating apparatus 35 is connected with harvester 34, based on the CT image of described the first digital signal and described the second digital signal reconstruction inspected object.
Fig. 6 is according to the structural representation of the CT equipment of the another embodiment of the utility model.As shown in Figure 6, the static CT imaging system of the multi-power spectrum shown in this example comprises two scanning stages, and the first scanning stage and the second scanning stage have been used respectively distributed X source A and distributed X source D.All X sources of distributed X source A are set the identical beam energy that goes out, all X sources of distributed X source D are set the identical beam energy that goes out, and the X source that keeps distributed X source A and D to go out beam energy different, arranging of the X source of distributed X source A and D is identical.4 row detector B, C, E, F is parallel is distributed in 4 planes.The 2 row detector Bs corresponding with distributed X source A and C next-door neighbour, and there is different-energy response, the X ray of launching for surveying distributed X source A.The 2 row detector Es corresponding with distributed X source D and F next-door neighbour, and there is different-energy response, the X ray of launching for surveying distributed X source D.
In this embodiment, connecting gear 32 carries inspected object rectilinear motion.The first scanning stage comprises the first distributed source, first row detector and second row detector.
The first distributed source comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object.First row detector, comprises multiple probe units with the first energy response, is arranged in parallel plane the first plane with described the first distributed source, receives the X ray that penetrates described inspected object.Second row detector, comprises multiple probe units with the second energy response, is arranged in parallel plane the second plane with described the first distributed source, receives the X ray that penetrates described inspected object;
The second scanning stage is along the setting of connecting with described the first scanning stage of the direction of motion of described inspected object, and described the second scanning stage comprises the second distributed source, the 3rd row's detector and the 4th row's detector.
The second distributed source comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object.The 3rd row's detector, comprises multiple probe units with the first energy response, is arranged in parallel plane the 3rd plane with described the second distributed source, receives the X ray that penetrates described inspected object.The 4th row's detector, comprises multiple probe units with the second energy response, is arranged on the parallel plane Siping City face with described the second distributed source, receives the X ray that penetrates described inspected object.
Harvester 34 is connected with described first row detector, described second row detector, described the 3rd row's detector device and described the 4th row's detector, the X ray that described first row detector is surveyed is converted to the first digital signal, the X ray that described second row detector is surveyed is converted to the second digital signal, the X ray that described the 3rd row's detector is surveyed is converted to three digital signal, and the X ray that described the 4th row's detector is surveyed is converted to the 4th digital signal.
Treating apparatus 35 is connected with described harvester 34, rebuilds the CT image of inspected object based on one of described the first digital signal, described the second digital signal, described three digital signal and described the 4th digital signal.
Although in the above-described embodiment, each scanning stage of CT equipment all comprises two row's detector arrays, and those skilled in the art should expect, can use the more detector array of more number.Equally, comprise the 3rd parallel row's detector in the first scanning stage, comprise the 4th row's detector at the second scanning machine.In addition, in certain embodiments, the ray energy spectrum of the ray energy spectrum of the first distributed source and the second distributed source can be identical also can need to be set to differently according to different, or partly overlaps.
The static CT imaging system of multi-power spectrum that above-described embodiment proposes is used distributed X source from different perspectives luggage and articles to be irradiated, save the High Rotation Speed slip ring in existing CT system, security reliability is high, reduce system cost, improve sweep velocity, simultaneously in conjunction with multi-power spectrum analytical technology, can obtain atomic number and the electron density of the inner optional position of luggage and articles, thereby for searching for dangerous goods, the subsequent applications such as search for smugglers and smuggling goods provides how more intuitive information, to checking fast and accurately explosive, fire goods, the prohibited items tools such as drugs are of great significance.
The scheme of this embodiment is not only static CT technology to combine with multi-power spectrum analytical technology, more be the ingehious design of distributed X source and multi-detector in system and arrange, thereby avoid the ray that the multi-power spectrum implementation method of the CT system based on slip ring occurs in static CT system to slant the projection angle offset issue between problem and multi-energy data, thereby ensured that CT rebuilds the resolution of image and the precision of EDAX results.
Above detailed description is by user's block diagram, process flow diagram and/or example, the numerous embodiment that set forth imaging system and method.In the situation that this block scheme, process flow diagram and/or example comprise one or more functions and/or operation, it will be understood by those skilled in the art that each function in this block scheme, process flow diagram or example and/or operation can by various hardware, software, firmware or in fact their combination in any come separately and/or jointly realize.In one embodiment, described in embodiment of the present utility model, some parts of theme can realize by special IC (ASIC), field programmable gate array (FPGA), digital signal processor (DSP) or other integrated forms.But, those skilled in the art will recognize that, some aspects of embodiment disclosed herein can realize in integrated circuit on the whole or partly equally, (be for example embodied as one or more computer programs of moving on one or more computing machine, be embodied as one or more programs of moving in one or more computer system), (be for example embodied as one or more programs of moving on one or more processors, be embodied as one or more programs of moving on one or more microprocessors), be embodied as firmware, or be embodied as in fact the combination in any of aforesaid way, and those skilled in the art are according to the disclosure, to possess design circuit and/or write software and/or the ability of firmware code.In addition, those skilled in the art will recognize that, described in the disclosure, the mechanism of theme can be distributed as the program product of various ways, and regardless of the actual particular type of signal bearing medium that is used for carrying out distribution, and the exemplary embodiment of theme is all suitable for described in the disclosure.The example of signal bearing medium includes but not limited to: recordable-type media, as floppy disk, hard disk drive, compact-disc (CD), digital universal disc (DVD), numerical tape, computer memory etc.; And transmission type media, for example, as numeral and/or analogue communication medium (, optical fiber cable, waveguide, wire communication link, wireless communication link etc.).
Although described the utility model with reference to several exemplary embodiments, should be appreciated that term used is explanation and exemplary and nonrestrictive term.Because the utility model can specifically be implemented in a variety of forms and not depart from spirit or the essence of utility model, so be to be understood that, above-described embodiment is not limited to any aforesaid details, and explain widely in the spirit and scope that should limit in the claim of enclosing, therefore fall into whole variations in claim or its equivalent scope and remodeling and all should be the claim of enclosing and contain.
Claims (7)
1. the static CT equipment of multi-power spectrum, is characterized in that, comprising:
Connecting gear, carrying inspected object rectilinear motion;
Distributed source, comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object;
Sniffer, comprise first row detector and the second row detector adjacent with described first row detector in the direction of motion of described inspected object, described first row detector comprises multiple probe units with the first energy response, be arranged in parallel plane the first plane with described distributed source, reception penetrates the X ray of described inspected object, described second row detector comprises multiple probe units with the second energy response, be arranged in parallel plane the second plane with described distributed source, reception penetrates the X ray of described inspected object,
Harvester, is connected with described sniffer, and the X ray that described first row detector is surveyed is converted to the first digital signal, and the X ray that described second row detector is surveyed is converted to the second digital signal;
Treating apparatus, is connected with described harvester, based on the CT image of described the first digital signal and described the second digital signal reconstruction inspected object.
2. CT equipment as claimed in claim 1, is characterized in that, in described first row detector and described second row detector, one of at least has a filter plate.
3. CT equipment as claimed in claim 1, is characterized in that, each ray source point is specially carbon nano-tube X-ray tube.
4. CT equipment as claimed in claim 1, it is characterized in that, described sniffer is also included in the 3rd row's detector adjacent with described second row detector in the direction of motion of described inspected object, described the 3rd row's detector comprises multiple probe units with the third energy response, be arranged in parallel plane the 3rd plane with described distributed source, receive the X ray that penetrates described inspected object;
The X ray that described harvester is surveyed described the 3rd row's detector is converted to three digital signal, and the X ray that described the 3rd row's detector is surveyed is converted to three digital signal;
Described treating apparatus is rebuild the CT image of inspected object based on described the first digital signal, described the second digital signal and described three digital signal.
5. the static CT equipment of multi-power spectrum, is characterized in that, comprising:
Connecting gear, carrying inspected object rectilinear motion;
The first scanning stage, comprising:
The first distributed source, comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object;
First row detector, comprises multiple probe units with the first energy response, is arranged in parallel plane the first plane with described the first distributed source, receives the X ray that penetrates described inspected object;
The second scanning stage, along the setting of connecting with described the first scanning stage of the direction of motion of described inspected object, described the second scanning stage comprises:
The second distributed source, comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object;
Second row detector, comprises multiple probe units with the second energy response, is arranged in parallel plane the second plane with described the second distributed source, receives the X ray that penetrates described inspected object;
Harvester, is connected with described first row detector and described second row detector, and the X ray that described first row detector is surveyed is converted to the first digital signal, and the X ray that described second row detector is surveyed is converted to the second digital signal;
Treating apparatus, is connected with described harvester, based on the CT image of described the first digital signal and described the second digital signal reconstruction inspected object.
6. the static CT equipment of multi-power spectrum, is characterized in that, comprising:
Connecting gear, carrying inspected object rectilinear motion;
The first scanning stage, comprising:
The first distributed source, comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object;
First row detector, comprises multiple probe units with the first energy response, is arranged in parallel plane the first plane with described the first distributed source, receives the X ray that penetrates described inspected object;
Second row detector, comprises multiple probe units with the second energy response, is arranged in parallel plane the second plane with described the first distributed source, receives the X ray that penetrates described inspected object;
The second scanning stage, along the setting of connecting with described the first scanning stage of the direction of motion of described inspected object, described the second scanning stage comprises:
The second distributed source, comprises multiple ray source points, and described multiple ray source points are arranged in the plane vertical with the direction of motion of inspected object, at least partly around described inspected object, and sends X ray towards described inspected object;
The 3rd row's detector, comprises multiple probe units with the first energy response, is arranged in parallel plane the 3rd plane with described the second distributed source, receives the X ray that penetrates described inspected object;
The 4th row's detector, comprises multiple probe units with the second energy response, is arranged on the parallel plane Siping City face with described the second distributed source, receives the X ray that penetrates described inspected object;
Harvester, be connected with described first row detector, described second row detector, described the 3rd row's detector device and described the 4th row's detector, the X ray that described first row detector is surveyed is converted to the first digital signal, the X ray that described second row detector is surveyed is converted to the second digital signal, the X ray that described the 3rd row's detector is surveyed is converted to three digital signal, and the X ray that described the 4th row's detector is surveyed is converted to the 4th digital signal;
Treating apparatus, is connected with described harvester, rebuilds the CT image of inspected object based on one of described the first digital signal, described the second digital signal, described three digital signal and described the 4th digital signal.
7. CT equipment as claimed in claim 6, is characterized in that,
Described the first scanning stage is also included in the 5th row's detector adjacent with described second row detector in the direction of motion of described inspected object, described the 5th row's detector comprises multiple probe units with the third energy response, be arranged in parallel plane the 3rd plane with described distributed source, receive the X ray that penetrates described inspected object;
Described the second scanning stage is also included in the 6th row's detector adjacent with described the 4th row's detector in the direction of motion of described inspected object, described the 6th row's detector comprises multiple probe units with the third energy response, be arranged on the parallel plane Siping City face with described distributed source, receive the X ray that penetrates described inspected object;
The X ray that described harvester is surveyed the described the 5th and the 6th row's detector is converted to the 5th and the 6th digital signal;
Described treating apparatus is rebuild the CT image of inspected object based on the described first to the 6th digital signal.
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| CN201320879188.2U CN203909313U (en) | 2013-12-27 | 2013-12-27 | Multi-energy spectrum static CT apparatus |
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| CN201320879188.2U CN203909313U (en) | 2013-12-27 | 2013-12-27 | Multi-energy spectrum static CT apparatus |
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| CN203909313U true CN203909313U (en) | 2014-10-29 |
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| CN104483711A (en) * | 2014-12-17 | 2015-04-01 | 同方威视技术股份有限公司 | Radiation imaging system based on distributed light source |
| CN104749648A (en) * | 2013-12-27 | 2015-07-01 | 清华大学 | Multi-energy spectrum static CT apparatus |
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| WO2020087825A1 (en) * | 2018-10-31 | 2020-05-07 | 北京纳米维景科技有限公司 | Multi-energy static security ct system and imaging method |
| JP2022506294A (en) * | 2018-10-31 | 2022-01-17 | 北京納米維景科技有限公司 | Multi-stage energy type fixed safety inspection CT system and image formation method |
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