CN1246647A - Multifunctional industrial X-ray imaging system - Google Patents
Multifunctional industrial X-ray imaging system Download PDFInfo
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- CN1246647A CN1246647A CN 99113199 CN99113199A CN1246647A CN 1246647 A CN1246647 A CN 1246647A CN 99113199 CN99113199 CN 99113199 CN 99113199 A CN99113199 A CN 99113199A CN 1246647 A CN1246647 A CN 1246647A
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Abstract
A multifunctional X-ray imaging system for industrial or security inspection has an X-ray beam flying-spot scanner positioned between X-ray source and the object to be inspected. In the controller system, transmitted beam detector has a sensitive volume in arc strip shape and its position has a sensitive volume in arc strip shape and its position is opposite to the light limiting seam of flying-spot scanner. In drive system, there is a rotary tray. Said imaging system is aimed at using a set of X-ray imaging system to respectively acquire the perspective images of whole or partial object and the CT image of predefined cross section. Their resolution can be chosen by software in advance.
Description
The present invention relates to the novel imaging system of X ray that a kind of industry or safety inspection are used, the body medical image that also can be applicable to not comprise locomotive organ (as heart) in principle obtains.
Existing industry (safety) checks that X line device for image can divide two big classes roughly: a class is a transmission imaging device, comprise the simplest planar beam irradiation film imaging, and cooperate the in good time detection system of telephotography, and then develop into wire beam scanning computer generated image system with image intensifier tube.Another kind of is X computer on line fault imaging device, i.e. Industrial CT Machine utilizes the covering of the fan beam that some feature section that will detect thing is rotated 360 ° scanning continuously, and gained signal of video signal machine is as calculated handled the X line image that obtains this fault surface.
If the examiner had both wanted to obtain the whole transmission image of examined object, obtain the fault image of some section again, just must purchase simultaneously and prepare two kinds of x-ray imaging systems, and successively be placed in after operating respectively in two kinds of systems just possible subject.Also do not exist in the existing x-ray imaging system cover need not change examined object and imaging device can obtain on demand subject the integral perspective image and the x-ray imaging system of interested some section broken layer image.
The invention provides a kind of multifunctional industrial X-ray imaging system, its objective is only with a cover x-ray imaging system device, select different scan mode and mathematical image tupe by operation, the fluoroscopy images that can obtain the examined object in whole or in part that resolution can be in advance selects with software respectively with the CT faultage image of predetermined section.
The present invention is achieved through the following technical solutions:
A kind of multifunctional industrial X-ray imaging system, it includes x-ray source, the mechanical scanning tractor and the microcomputer numberical control system thereof of examined object, the detector system sense channel, the microcomputer digital image system, it is characterized in that: it also includes the X-ray beam flying spot scanning device, its position is arranged between x-ray source and the sense channel, the X-ray beam flying spot scanning device is by limit light runner, fixedly light-limiting gap sheet and drive motor are formed, on limit light runner, be uniform-distribution with light-limiting gap, fixedly have only a light-limiting gap on the light-limiting gap sheet, limit light runner connects with the rotating shaft of drive motor; The sensitive volume of transmission beam finder is the circular arc bar shaped in detector system, and its position is corresponding with the light-limiting gap in the X-ray beam flying spot scanning device; The platform that drags in the dragging system is provided with the pallet that can rotate continuously; Examined object is placed on the rotating disk.
Microcomputer numerical control mechanical scanning dragging system and digital image system are provided with two kinds of mode of operations, and promptly integral perspective imaging pattern and CT fault imaging pattern can be selected to switch by specialized hardware switch or software on the master station.
In sense channel, dispose scattering detector, scattering and backward scattering detector and corresponding electronic accessories thereof before including.
The section of sense channel is circular, by the maximum cross dimensions design sense channel internal diameter of the thing that detects.
Principle of work of the present invention is: space (coordinate) time (sequence) transfer principle is the core of flying-spot scanner technology.The flying-spot scanner technology is used widely in (electron beam scanning) and the optics flying-spot scanner tube in television camera tube, scanning electron microscope, this technology space plane coordinate diagram pixel signal transition for being arranged in time tandem signal in certain sequence, thereby make the receptacle size not be subjected to spatial resolution limitations.Also do not adopt the flying-spot scanner technology in the existing x-ray imaging system, adopt the wire beam translation scanning of linear array detector to obtain the transmission signal of video signal in the bag X ray examination imaging system of being expert at, in the industry CT imaging system, adopt garden arc detector array covering of the fan beam rotary scanning to obtain CT fault image signal, its imaging space resolution is directly by single-element detector size decision in the detector array, and has how many single-element detectors will dispose how many road electronic circuit annexes to export simultaneously.The present invention is according to the similar characteristics that all adopt wire beam and detector array in above-mentioned two kinds of x-ray imaging systems, analyze its difference and be that just the scanning motion mode is different different with reconstruction of image signal processing mode, draws the conclusion that can realize two kinds of scan modes and image reconstruction pattern fully with same set of hardware.And further adopt the flying-spot scanner technology, and make image spatial resolution and detector cells size irrelevant, straight line or camber line locus also are converted into the time string sequence, and form design of the present invention.
Advantage that design feature of the present invention is brought and effect:
Topmost characteristics of the present invention are to adopt an industrial X-ray imaging system, can obtain the whole transmission image of examined object, can obtain the fault image of some section again, prepare two kinds of x-ray imaging systems, and subject successively is placed in operation respectively in two kinds of systems and needn't purchase simultaneously.
It is compared with existing industrial x-ray imaging device, the examined object body only is subjected to a branch of needle-like beam irradiation at any time, thereby pollute especially little to ambient radiation, imaging resolution is not limited by detector size, scattering greatly reduces image disruption, adopted the flying-spot scanner technology, can set up scattering detector and corresponding imaging system on demand, obtain whole dispersion image, thereby can pretend to find in the background low atomic number object at metal, as drugs, explosive and unevenness thereof can be checked object that certain sectional dimension length is not limit or the like a series of outstanding advantages.Estimate that enforcement of the present invention will provide a kind of new effective means for the anti-malicious anti-smuggling inspection of special survey, safety of industrial products.
Accompanying drawing 1 is the structural representation of the vertical multi-functional imaging system critical piece that drags of a specific embodiment 300kv of the present invention;
The schematic diagram that accompanying drawing 2 is surveyed when scattering and backward scattering detector before having for the present invention.
The present invention is specified by embodiment below in conjunction with accompanying drawing:
The composition of system of the present invention:
According to the element composition of examined object body and the needs of physical dimension and inspection, but the present invention's specific design is different transillumination electric pressures, additional or not additional scatter imaging system, different channel cross-section size, the vertical or horizontal various specific embodiments such as scanning driving style that drag examined object checked.It is formed and all comprises five major parts.Multi-functional imaging system with the vertical work stage of figure one 300KV is that example is illustrated now.Figure one x-ray source of this system that drawn, flying-spot system, detector system and examined object drag the major part and the mutual relationship of scanning system.
A) x-ray source is formed and size according to institute's inspected object, selects for use X line source highest voltage level can be divided into 160KV, 300KV, 450Kv and 600KV.The following X line source of 300KV adopts continuous type conventional reflective anode X spool, and 300KV and the efficient industrial x-ray machine of the above transmission anode that then adopts the inventor to invent (application number is 9811400.4) thereof are as the X line source.The X line source is again by the X spool, high-voltage generator, and controller and recirculated water cooler are formed, and the X line of continous-stable is provided.1 is transmission anode X spool focus among the figure one, and 2 is the component X line head that comprises the voltage multiplying rectifier part.
B) X-ray beam flying spot scanning device.X spool output x-ray radiation is controlled to be the point-like beam of continuous sweep campaign.Point-like beam cross-section size by the minimum dimension design of the high spatial resolution pixel of requirement.By fixedly light-limiting gap sheet 4 and limit light runner 3 and drive motor 5 are formed.Also be uniform-distribution with some light-limiting gaps on the limit light runner 3, guarantee to form the continuity of point-like beam scanning and the homogeneity of speed by the dedicated calculation Design and Machining.Fixed and movable light-limiting gap is to cut out by each specific direction on the gravity alloy material plate, and its sheet metal thickness guarantees that it is that the photon transmissivity is lower than 10 that institute adopts high energy
-3Below.Drive motor 5 is synchronized with the movement by the translation of selected spatial resolution and work stage 8, the rotation and the image receiving system signals collecting of rotating disk 7 by system controlled by computer.
C) detector system: form with its attached electronic device by transmission beam finder 9, the sensitive volume of transmission detectors 9 is the circular arc bar shaped, its width designs by transmitted beam to this position breadth extreme (comprising half intensity penumbra region width), arc size is by the work passage size design, thickness is chosen by acceptance ceiling capacity photon, length is definite by obtaining the ray scanning breadth extreme, can be by tens centimeters to several meters.As needs, can select to increase scattered ray detector 10, its width ° is advisable to the scattered ray of 40 ° of cone angle scopes forward and backward ± 30 can accept beam, leaves the space that allows straight beam pass through in the middle of the back reflection line detector, then leaves peace transmission detectors 9 spaces, road in the middle of the preceding scattering detector.Scattering detector 10 has independently attached electronic device.Notice that no matter be transmission detectors 9 and scattering detector 10, the X line signal of video signal of collection all is that each is by a passage output.Irrelevant with the spatial resolution size, unlike existing X-ray scanning imaging system and CT machine, resolution is high more, and output channel is many more.The space that is crossed by detector is is checked that thing is dragged the sense channel that passes through, and its section is circular.Connect the maximum cross dimensions design sense channel cross section internal diameter of the thing that detects, can be tens centimeters to several meters, the internal diameter of sense channel is 60 centimeters among the figure one.
D) checked the mechanical scanning tractor and the microcomputer numberical control system thereof of thing, scanning tractor can be divided into level and drag with vertical and drag two kinds of structures, level drags the parts that are suitable for detecting overlength, but its rotating mechanism is complicated, figure's one is the example that vertically drags, be made up of lifting table 8 and the garden circle Rotary tray 7 that is placed on the platform, (having omitted drive motor etc. among the figure) checked that thing 6 is fixed on Rotary tray central authorities.The maximum that lifting drags platform 8 drags scope according to being checked that the maximum length of thing designs, and is two meters in figure one.Its rising or falling speed, stop place and dial rotation speed and turning collar number average are controlled by main control microcomputer, carry out automatically by software program.Mechanical scanning tractor is provided with two kinds of mode of operations by microcomputer numerical control, and promptly integral perspective imaging pattern and CT fault imaging pattern can be selected to switch by specialized hardware switch or software on the master station.
The digital control system of mechanical scanning tractor is controlled the rotation of work stage translation and workpiece respectively according to main control software instruction, and control flying-spot scanner dial rotation, carry out synchronously with the signal of video signal collection, to finish scanning motion and the signal of video signal collection that various mode of operation is scheduled to.Microcomputer numberical control system is provided with two kinds of mode of operations for mechanical scanning tractor, i.e. integral perspective imaging pattern and CT fault imaging scanning drags pattern, can be selected to switch by specialized hardware switch or software on the master station.
E) digital image system
Digital image system comprises the collection of signal data, stores, and the storage of image reconstruction (comprising the reconstruction of various patterns) reconstructed image and fluorescent screen show, the various processing of image and the hardware and softwares such as hard copy output of image.Digital image system is provided with two kinds of mode of operations, i.e. integral perspective imaging pattern and CT fault imaging scanning drags pattern, can be selected to switch by specialized hardware switch or software on the master station.
Machinery digital control system and digital image system in principle can be by CPU host computer control, also can be by the total system software control, comprise by the illuminate condition (KV, MA and time shutter) of interface control X line source, master control system is not divided into an ingredient more separately here.
The present invention can adopt two kinds of patterns to obtain image, and by the work of whole transmission imaging pattern the time, the examined object platform is in the at the uniform velocity translation of flying-spot scanner vertical direction, the translatory distance of each scan period be decide the developed width of image resolution ratio pixel correspondence.The spacescan track that X Line beam point forms, cover whole examined object on examined object.Digital image system is converted into correspondence position image slices vegetarian refreshments width to each time transmission (scattering) signal of video signal of this track can directly obtain whole transmission (scattering) image.
When pressing the work of CT fault imaging pattern, examined platform and be fixed on the position of X line sweep line by the required fault surface of examined object, in flying-spot scanner, the platform rotating disk slowly rotates 360 °, digital image system deposits the radiolucent shadow image signal in working storage by the corresponding sequence of space-time, and goes out the radioparent fault image of this section by the mode reconstruction of CT tomographic image reconstructing.Because it is still unresolved about the theory and the algorithm of the reconstruction of scattered ray picture signal computed tomography image at present, the present invention wouldn't adopt scattered ray detector system and respective electronic annex (this system is an option of perspective function as a whole only, does user's apolegamy that contrast is observed for being necessary to obtain the low atomic number object image) when the fault imaging horizontal type.The fault imaging pattern also can adopt the platform rotating disk to move in a spiral manner and scan, and once obtains the interior multilayer fault image signal of certain-length scope and sets up this length examined object three-dimensional perspective image.
Because the preceding scattering detector and the backward scattering detector 10 this structures that are provided with, make that the low atomic number object that is hidden in after the metal object 12 11 is detectable to come out, as shown in Figure 2.
The invention is characterized in a set of equipment and finish multiple imaging function, below its feature is done further narration:
1. the X of system line maximum operating voltage is looked the thing material of examining, size stepping, can be to van container 600KV (class such as 160KV, 300KV, 450KV, 600KV) with light metal smallclothes 160KV.Wherein 300KV and above equipment thereof all adopt the transmission sun to offer a high price to imitate industrial x-ray machine (ZL98114400.4) and make radiographic source.
2. by the cross dimensions design sense channel of the thing that detects, passage is circular, and examined object length is unrestricted in principle.
3. adopting point-like X line beam to scan the thing section mode of examining continuously repeatedly works.Point-like beam cross-section size by the high spatial resolution decision of requirement, any moment examined object passage has only any to be subjected to the irradiation of ray, it is worn-out that its transmission and scattered ray all obtain complete receiving type screen, is significantly less than other existing x-ray imaging system so native system pollutes environmental radiation.
4. point-like continuous sweep beam is to be obtained in X line spot beam by flying spot scanning device.Flying spot scanning device is made up of fixing light-limiting gap sheet 4 and limit light runner 3, and some limit light slits that evenly distribute on the limit light runner 3 meet continuity and the velocity uniformity of its shaped position specialized designs to guarantee that the point-like beam scanning moves.Fixing limit light slit and rotation limit light slit are by formed by the specific direction cutting on the heavy metal sheet alloy.Gap width is by high spatial resolution that requires and the decision of relative position size.Sheet metal thickness guarantees that the highest energy photon transmissivity that adopts is lower than 10
-3Below.The runner motor is to be synchronized with the movement by translation, rotation and the picture signal collection of system controlled by computer by corresponding rotating speed of selected spatial resolution and worktable.
5. image is accepted detector and is mainly comprised radioparent detector 9, and its sensitive volume width is the detection channels diameter for accepting the maximum wide district of beam, camber, effective length, and thickness is enough accepted efficient degree of being so that the sub-energy of accepted X linear light is reached.Because adopt one time of space switch technology, only need an attached electronic line channel output.
6., can match scattering detector 10 systems to find low atomic number object such as drugs, explosive etc. behind the sheet metal, scattering and backward scattering detector 10 before comprising if the user need obtain dispersion image simultaneously and do comparison check.Its effective width is advisable with the front and back scattered photon that can collect about 40 ° of cone angles, and garden arc, diameter are channel diameter.Leave in front and back and to allow direct rays pass through and the space of transmission detectors fully, equally also only with an attached electronic line channel output, transmission detectors and scattering detector output to image reception and the reconstructing system of oneself separately.
7. system provides two kinds of scanning imagery modes: the mode that 1. whole transmission (scattering) image obtains, this moment, examined object was along the vertical direction translation of flying-spot scanner plane.Stop by scanning after the examined object length.Can in two image displays, obtain translucent overall image simultaneously respectively by transmission and scattered signal reconstruction.The high-density objects of low atomic number will obtain outstanding manifesting in the scatter image.2. CT tomography pattern.The required position of fault of examined object is positioned to scan after flying-spot scanner plane controlled substance rotates 360 ° stops, can manifesting in the fluorescent screen by the CT faultage image that the transmission signal of collection storage is rebuild this section.This pattern stops after also can be in the certain-length scope scanning some circles in the helical motion mode, is rebuild the faultage image of several layers in this length range or is further produced the 3-dimensional image of this length range by the collection storage transmission signal.Two kinds of images all can be stored, and carry out conventional Digital Image Processing and output hard copy.
8. native system adopts fixed detector and X line source in above-mentioned scanning motion, and parallelly moves or rotate the examined object mode and work.Parallel moving can be designed to tangential movement or vertical movement mode.
9. the spatial resolution of image that native system becomes can change corresponding scanning motion bundle rate and change with software control on demand.For example, by main control microcomputer select for use low one grade, second gear spatial resolution, accelerate scanning imagery speed and reduce the lower storage capacity of every width of cloth.
Claims (4)
1, a kind of multifunctional industrial X-ray imaging system, it includes x-ray source, the mechanical scanning tractor and the microcomputer numberical control system thereof of examined object, the detector system sense channel, the microcomputer digital image system, it is characterized in that: it also includes the X-ray beam flying spot scanning device, its position is arranged between x-ray source and the sense channel, the X-ray beam flying spot scanning device is by limit light runner (3), fixedly light-limiting gap sheet (4) and drive motor (5) are formed, on limit light runner (3), be uniform-distribution with light-limiting gap, fixedly have only a light-limiting gap on the light-limiting gap sheet (4), limit light runner (3) connects with the rotating shaft of drive motor (5); The sensitive volume of transmission beam finder (9) is the circular arc bar shaped in detector system, and its position is corresponding with the light-limiting gap in the X-ray beam flying spot scanning device; The platform (8) that drags in the dragging system is provided with the pallet (7) that can rotate continuously; Examined object (6) is placed on the rotating disk (7).
2, multifunctional industrial X-ray imaging system according to claim 1, it is characterized in that: microcomputer numerical control mechanical scanning dragging system and digital image system are provided with two kinds of mode of operations, be integral perspective imaging pattern and CT fault imaging pattern, can select to switch by specialized hardware switch or software on the master station.
3, multifunctional industrial X-ray imaging system according to claim 1 is characterized in that: dispose scattering detector (10) in sense channel, scattering and backward scattering detector and corresponding electronic accessories thereof before including.
4, multifunctional industrial X-ray imaging system according to claim 1 is characterized in that: the section of sense channel is for circular, by the maximum cross dimensions design sense channel internal diameter of the thing that detects.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 99113199 CN1107882C (en) | 1999-08-25 | 1999-08-25 | Multifunctional industrial X-ray imaging system |
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| CN 99113199 CN1107882C (en) | 1999-08-25 | 1999-08-25 | Multifunctional industrial X-ray imaging system |
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| CN1246647A true CN1246647A (en) | 2000-03-08 |
| CN1107882C CN1107882C (en) | 2003-05-07 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100480692C (en) * | 2003-08-23 | 2009-04-22 | 上海世鹏实验室科技发展有限公司 | Radiation source device |
| CN101178369B (en) * | 2007-10-23 | 2010-05-19 | 西安交通大学 | Industry ray detection negative film digitalizer |
| CN1932492B (en) * | 2005-09-15 | 2011-05-18 | 株式会社岛津制作所 | X-ray inspection device |
| WO2012088810A1 (en) * | 2010-12-31 | 2012-07-05 | 同方威视技术股份有限公司 | Device and method for ray beam scanning for back scattering imaging |
| CN103776848A (en) * | 2012-10-24 | 2014-05-07 | 同方威视技术股份有限公司 | Ray emitting device and imaging system |
| WO2014096705A1 (en) * | 2012-12-20 | 2014-06-26 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Scanning illuminating device, imaging device comprising same and method of implementation |
| CN105445303A (en) * | 2015-12-29 | 2016-03-30 | 清华大学 | Handheld back-scatter imager and back-scatter imaging method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012040930A1 (en) * | 2010-09-30 | 2012-04-05 | 上海英迈吉东影图像设备有限公司 | Point-by-point scanning device and method uesd in x ray imaging |
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1999
- 1999-08-25 CN CN 99113199 patent/CN1107882C/en not_active Expired - Fee Related
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100480692C (en) * | 2003-08-23 | 2009-04-22 | 上海世鹏实验室科技发展有限公司 | Radiation source device |
| CN1932492B (en) * | 2005-09-15 | 2011-05-18 | 株式会社岛津制作所 | X-ray inspection device |
| CN101178369B (en) * | 2007-10-23 | 2010-05-19 | 西安交通大学 | Industry ray detection negative film digitalizer |
| CN102565110B (en) * | 2010-12-31 | 2015-04-01 | 同方威视技术股份有限公司 | Device and method for scanning ray bundles for backscatter imaging |
| CN102565110A (en) * | 2010-12-31 | 2012-07-11 | 同方威视技术股份有限公司 | Device and method for scanning ray bundles for backscatter imaging |
| US8983033B2 (en) | 2010-12-31 | 2015-03-17 | Nuctech Company Limited | Scanning device and method for back-scatter imaging with a radiation beam |
| WO2012088810A1 (en) * | 2010-12-31 | 2012-07-05 | 同方威视技术股份有限公司 | Device and method for ray beam scanning for back scattering imaging |
| CN103776848A (en) * | 2012-10-24 | 2014-05-07 | 同方威视技术股份有限公司 | Ray emitting device and imaging system |
| WO2014096705A1 (en) * | 2012-12-20 | 2014-06-26 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Scanning illuminating device, imaging device comprising same and method of implementation |
| FR3000211A1 (en) * | 2012-12-20 | 2014-06-27 | Commissariat Energie Atomique | SCANNING LIGHTING DEVICE, IMAGING DEVICE COMPRISING SAME, AND METHOD FOR OPERATING SAME |
| US9557284B2 (en) | 2012-12-20 | 2017-01-31 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | Scanning illuminating device, imaging device comprising same and method of implementation |
| CN105445303A (en) * | 2015-12-29 | 2016-03-30 | 清华大学 | Handheld back-scatter imager and back-scatter imaging method |
| CN105445303B (en) * | 2015-12-29 | 2019-02-19 | 清华大学 | Hand-held back scattering imaging instrument and its imaging method |
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| CN1107882C (en) | 2003-05-07 |
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