CN1119922C - Digital network multiple-probe flashing X-ray imaging method and equipment - Google Patents
Digital network multiple-probe flashing X-ray imaging method and equipment Download PDFInfo
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- CN1119922C CN1119922C CN 00109623 CN00109623A CN1119922C CN 1119922 C CN1119922 C CN 1119922C CN 00109623 CN00109623 CN 00109623 CN 00109623 A CN00109623 A CN 00109623A CN 1119922 C CN1119922 C CN 1119922C
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Abstract
The present invention relates to a digital network multiple-probe flashing X-ray imaging method, which comprises the steps; a plurality of digital X-ray image detectors are arranged; the fluorescent screen of each detector converts a received X-ray image into a fluorescent image; the fluorescent image is processed by a front end client; after a server receives image data from the front end client, a target is divided, quantitative calculation is carried out, etc. The device of the present invention is provided with a multi-layer protective sleeve outside a video camera, and an uninterruptible power supply is arranged. The method and the device of the present invention can obtain a plurality of flashing X-ray images of different moments and two orthogonal directions.
Description
Technical field the present invention relates to a kind of digital network multiple-probe flashing X-ray imaging method and device, belongs to the radiation imageable technical field.
The background technology flash X-ray is a very short pulsed X-ray of duration, and the pulse duration can be short to several nanoseconds when adopting flash of light X machine, can be short to several microseconds when adopting accelerator.Flashing X-ray imaging can be used for taking the fluoroscopy image of ultrahigh speed moving object, as the motion conditions of bullet in bore, the stability of trajectory and bullet, the armour-piercing jet process, blast process, blast fragment MOMENTUM DISTRIBUTION, course of injection, the explosive forming process, mechanical part gap in the high speed rotating and the liquid stream in the multi-cavity mold etc.Prior art is to adopt X-ray film to take, and knowledge of result need treat that photo develops analysis immediately, and it is very time-consuming to adjust experiment parameter.And the gray scale resolution capability of egative film is low, non-linear big, and the flushing liquor mis-arrange can be lost valuable information.The daily consumption costs of X-ray film is also big.Israel and China have succeeded in developing portable digital X ray image instrument, can obtain the X ray image in real time without film, are presented on the notebook immediately.But have only a very little image to survey probe, aim at public security department stationary object is made the on-the-spot usefulness that detects.Do not catch the function of ultrahigh speed moving object, can not protect the sigmatron high-dose irradiation, can not constitute many probe systems, can not be with a plurality of time interval shot object high-speed motion processes; More can not spatially carry out stereoscopic shooting to high-speed moving object.
The summary of the invention purpose is to propose a kind of digital network multiple-probe flashing X-ray imaging method and device, obtains the flash X-ray image of multi-detector array and carries out the how instantaneous quadrature shooting of digitlization by network with central server (master computer).
The digital network multiple-probe flashing X-ray imaging method that the present invention proposes comprises following each step:
1, a plurality of digital X ray image detectors is set, lines up a pair ofly at orthogonal direction in twos, and arrange two pairs or how right in turn in the measured target direction of motion.Each detector dead ahead all is provided with a flash of light X-ray pipe of launching X ray;
2, flash of light X-ray pipe is controlled by timing circuit, it is worked as when measured target appears in its visual field flash, and after this flash of light sees through measured target, is received by corresponding digital X ray image detector;
3, the phosphor screen of each digital X ray detector is converted to fluorescent image with the X ray image that receives, and after being taken by gamma camera, pictorial data is outputed to the respective channel of front end client computer;
4, the microprocessor in each passage of front end client computer and two frame data memory blocks, alternately each frame image data is existed respectively in two memory blocks, therein storage area stores one frame image data the time, microprocessor is discerned another memory block of having stored the former frame pictorial data, if image averaging brightness less than predetermined threshold value, allows it refresh subsequently; If image averaging brightness greater than predetermined threshold value (having received the X-ray flash of light), is then kept, and is sent to the webserver by the network interface card and the network switch;
5, after server receives the pictorial data of front end client computer, deposit main storage in and on display, show into each channel images quadrature and sequential delays;
6, institute's mapping resembled cut apart target, delineate object boundary, carry out target designation: at first eliminate isolated white point and the discrete stain that occurs in the X ray image by medium filtering, set up gray threshold then, gray scale image is transformed to " 0 ", " 1 " binary picture, detect each pixel from first row, gray scale is that 1 pixel is numbered, if its previous pixel gray scale is 1, then numbering is identical with previous pixel, if its previous pixel gray scale is 0, then detect same column lastrow pixel, same column lastrow pixel gray scale is 1, then numbering is identical with same column lastrow pixel, otherwise compile new number, carry out so line by line, be about to the target (bullet in the image, blast fragment etc.) cut apart, numbering;
7, said image is quantitatively calculated: the target pixel number of same numbering is target area.In order to obtain the quality of target, need earlier the pixel gray scale to be converted into corresponding thickness (by the exponential decay dependence of radiation), then the pixel thickness addition of same numbering is obtained the volume of target, multiply by target substance density and be aimed quality.In order to calculate the barycenter of target, obtain the pixel thickness square (pixel thickness multiply by the pixel space coordinate) of same numbering earlier, again divided by the volume of target, promptly get the barycenter space coordinates after the addition.
The present invention has designed the digital network multiple-probe flashing X-ray imaging device especially, this device comprises X ray scintillation screen, fluorescent image speculum and video camera, the X ray scintillation screen places detector cabinet one side, the relative X ray scintillation screen of fluorescent image speculum angle at 45, oblique placing in the cabinet, video camera is fixed in the cabinet, and camera is aimed at the full visual field of X ray glare shield by visual speculum, and can focus on.Be provided with the multilayer proofing cover in the video camera outside, the composition of protective jacket respectively is: steel layer, lead layer and steel layer, and to the camera arrangement uninterrupted power supply.The cabinet outer wall is provided with hanging ring.
The digital network multiple-probe flashing X-ray imaging method and the device of the present invention's design, have a plurality of digitized big scintillation screen X ray imaging detectors, simultaneously (or sequential delays) obtain that a plurality of differences are instantaneous, the flash of light x ray image of two orthogonal directions.And calculate the three-dimensional space position and the quality of high-speed moving object.
Description of drawings
Fig. 1 is the schematic diagram of image formation method of the present invention.
Fig. 2 is the schematic diagram of multichannel front end client computer of the present invention and network configuration.
Fig. 3 is the digitlization flash X-ray image detector schematic diagram that uses in the image device of the present invention, and wherein Fig. 3 b is the A-A cutaway view of Fig. 3 a.
Fig. 4 is that image object is cut apart automatically and numbered flow chart in the image formation method of the present invention.
Among Fig. 1, the 1st, flash X-ray pipe Y1, the 2nd, flying object incident transducer, the 3rd, X-ray detector cabinet X1, the 4th, tested flying object, the 5th, X-ray detector cabinet Y1, the 6th, flash X-ray pipe X1, the 7th, flash X-ray pipe Y2, the 8th, X-ray detector cabinet Y2, the 9th, flash X-ray pipe X2, the 10th, X-ray detector cabinet X2, the 11st, FLASHING X-RAY CAMERA 2, the 12nd, flash of light triggers and delay controller, the 13rd, image obtains the front end client computer, and the 14th, master computer (server), the 15th, FLASHING X-RAY CAMERA 1.
Among Fig. 3, the 21st, X-ray detector cabinet, the 22nd, hanging ring; the 23rd, X ray scintillation screen, the 24th, fixed scintillation screen baffle, the 25th, suspension type scintillation screen baffle; the 26th, fluorescent image speculum, the 27th, camera lens, the 28th, flash of light CCD gamma camera; the 29th, barrel shape radiation shield cover; the 30th, picture intelligence output cable, the 31st, uninterrupted power supply, the 32nd, steel layer; the 33rd, lead layer, the 34th, steel layer.
Embodiment Fig. 1 is the schematic diagram of explanation image formation method of the present invention, is that example describes with two instantaneous, quadrature imaging (4 passage) system that detects trajectory below.Flash X-ray pipe Y1, X1, Y2, X2 (numbering 1,6,7,9) shine the scintillation screen of X-ray detector X1, Y1, X2, Y2 (numbering 3,5,10,8) respectively.Transducer 2 provides triggering signal when bullet passes, the default delay back trigger flashing X-ray production apparatus 15 through flash of light triggering and delay controller 12 makes just (t when bullet passes through irradiated region of X-ray tube 1 and 6
1) flash of light, its fluoroscopy image is that the scintillation screen of X-ray detector 3 and 5 receives, the formation picture intelligence is transferred to the flash X-ray image and obtains front end group of clients 13, carries out storing after choosing is declared in digitlization.When bullet flew the vision area of X-ray pipe 5 and 6, FLASHING X-RAY CAMERA 11 was delayed controller 12 and triggers, and X-ray pipe 7 and 9 is at t
2The bullet fluoroscopy image of this moment is taken in flash of light, X-ray detector 8 and 10, is transferred to front end group of clients 13 and carries out storing after choosing is declared in digitlization.This four images is transferred to server (master computer) 14 by the network interface card and the network switch then.Demonstrate this four images.Computer resembles orthogonal graph and handles, and can calculate the size, quality of target and at t
1, t
2The locus, thereby calculate parameters such as three-dimensional ballistic trajectory, gait of march, momentum change and the variation of bullet central shaft.
If at t
2The time bullet injected target, then a t
2What take is the instantaneous x-ray fluoroscopy image of terminal ballistics that bullet is hampered by target.If do not carry out stereoscopic shooting, all (4 of this examples) detectors are lined up a row, then can take bidimensional bullet image 4 moment continuously, obtain the exercise data of 4 instantaneous bullets in two-dimensional space.
The pictorial data of each flash X-ray image detector of the present invention, front end client computer by a respective channel is obtained, as shown in Figure 2, the front end client computer (FC) of each passage all has a microprocessor (CPU), two frame image memory blocks (A and B) and a network interface card; The image of controlling each detector obtains, discerns and transmits.If what image detector was used is the simulation gamma camera, signal sticks into capable digitlization (dotted line) by image earlier.The pictorial data that each front end client computer is obtained to Server Transport by the network switch.This network structure makes the very convenient and standardization of the expansion of system.Can expand to many arbitrarily port numbers, can form various visual obtain manner, on-the-spot measurement result is transmitted to relevant website by network.
Fig. 3 is an x ray image detector internal structure of the present invention, and the characteristics of x ray image detector of the present invention are: shockproof wave, no Disturbance in Power Net, gamma camera have multilayer protective coating.The 21st, the detector case, sealing, against sunshine, dustproof, moistureproof, its metal shell can stand certain shock wave or blast fragment.The 22nd, the casing hanging ring can hang and swing the detector case, weakens the impact strength of shock wave.The 23rd, x ray scintillation screen sends fluorescence during the x radiation exposure, the X ray image is converted to fluorescent image.The 24th, the baffle of fixed scintillation screen.The 25th, the suspension type baffle hangs on scintillation screen the place ahead, impacts with its swing property absorption fragment and blast.The 26th, the fluorescent image speculum.The 27th, camera lens.The 28th, the CCD gamma camera.The 29th, the distinctive CCD gamma camera of the present invention protective jacket, protective jacket are barrel shape steel, plumbous sandwich construction.Steel barrel shape outer cover intensity height, shock-resistant, even damaging, casing still can protect gamma camera.Plumbous matter internal layer can effectively shield all directions ray, in the various detection case placement directions of multi-channel system, all can avoid direct projection and scattered x rays irradiation gamma camera.Thereby avoid producing a large amount of visual white points and protect gamma camera not to be subjected to irradiation damage.The 30th, the picture intelligence output cable.31 is uninterrupted power supply, when x-ray source has strong electromagnetic to electrical network, can cut off the connection with electrical network temporarily when obtaining image.
The present invention is cut apart automatically the target in the image and is numbered.Flow chart is seen Fig. 4.At first eliminate the isolated white point and the discrete stain that may occur in the X ray image by medium filtering.Set up certain gray threshold then, gray scale image is transformed to " 0 ", " 1 " binary picture.From first each pixel of row detection, gray scale is that 1 pixel is numbered.As its previous pixel gray scale is 1, and then numbering is identical with previous pixel; As its previous pixel gray scale is 0, then detects same column lastrow pixel.Same column lastrow pixel gray scale is 1, and then numbering is identical with same column lastrow pixel; Otherwise compile new number.Carry out so line by line, the target (bullet, blast fragment etc.) that is about in the image has carried out cutting apart, numbering.
The target pixel number of same numbering is target area.In order to obtain the quality of target, need earlier the pixel gray scale to be converted into corresponding thickness (by the exponential decay dependence of radiation), then the pixel thickness addition of same numbering is obtained the volume of target, multiply by target substance density and be aimed quality.In order to calculate the barycenter of target, obtain the pixel thickness square (pixel thickness multiply by the pixel space coordinate) of same numbering earlier, again divided by the volume of target, promptly get the barycenter space coordinates after the addition.
Claims (2)
1, a kind of digital network multiple-probe flashing X-ray imaging method is characterized in that following each step of this method:
(1) a plurality of digital X ray image detectors are set, line up a pair ofly at orthogonal direction in twos, and arrange two pairs or how right in turn in the measured target direction of motion, each detector dead ahead all is provided with the flash of light X-ray pipe of an emission X ray;
(2) flash of light X-ray pipe is controlled by timing circuit, it is worked as when measured target appears in its visual field flash, and after this flash of light sees through measured target, is received by corresponding digital X ray image detector;
(3) phosphor screen of each digital X ray detector is converted to fluorescent image with the X ray image that receives, and after being taken by gamma camera, pictorial data is outputed to the respective channel of front end client computer;
(4) microprocessor in each passage of front end client computer and two frame data memory blocks, alternately each frame image data is existed respectively in two memory blocks, therein storage area stores one frame image data the time, microprocessor is discerned another memory block of having stored the former frame pictorial data, if image averaging brightness less than predetermined threshold value, allows it refresh subsequently; If image averaging brightness greater than predetermined threshold value, is then kept, and is sent to the webserver by the network interface card and the network switch;
(5) after server receives the pictorial data of front end client computer, deposit main storage in and on display, show into each channel images quadrature and sequential delays;
(6) institute's mapping is resembled cut apart target, delineate object boundary, carry out target designation: at first eliminate isolated white point and the discrete stain that occurs in the X ray image by medium filtering, set up gray threshold then, gray scale image is transformed to " 0 ", " 1 " binary picture, detect each pixel from first row, gray scale is that 1 pixel is numbered, if its previous pixel gray scale is 1, then numbering is identical with previous pixel, if its previous pixel gray scale is 0, then detect same column lastrow pixel, same column lastrow pixel gray scale is 1, then numbering is identical with same column lastrow pixel, otherwise compile new number, carry out so line by line, the target that is about in the image is cut apart, numbering;
(7) institute's mapping is resembled quantitatively calculate: earlier the pixel gray scale is converted into corresponding thickness, then the pixel thickness addition of same numbering is obtained the volume of target, multiply by target substance density and be aimed quality, in order to calculate the barycenter of target, obtain the pixel thickness square of same numbering earlier, be that pixel thickness multiply by the pixel space coordinate, again divided by the volume of target, promptly get the barycenter space coordinates after the addition.
2, a kind of digital network multiple-probe flashing X-ray imaging device, this device comprises the X ray scintillation screen, fluorescent image speculum and video camera, the X ray scintillation screen places detector cabinet one side, the relative X ray scintillation screen of fluorescent image speculum angle at 45, oblique placing in the cabinet, video camera is fixed in the cabinet, camera is aimed at the full visual field of X ray glare shield by visual speculum, and can focus on, it is characterized in that being provided with the multilayer proofing cover in the video camera outside, the composition of protective jacket respectively is: the steel layer, lead layer and steel layer, to the camera arrangement uninterrupted power supply, described cabinet outer wall is provided with hanging ring.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00109623 CN1119922C (en) | 2000-06-16 | 2000-06-16 | Digital network multiple-probe flashing X-ray imaging method and equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 00109623 CN1119922C (en) | 2000-06-16 | 2000-06-16 | Digital network multiple-probe flashing X-ray imaging method and equipment |
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| CN1275046A CN1275046A (en) | 2000-11-29 |
| CN1119922C true CN1119922C (en) | 2003-08-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102590237A (en) * | 2006-10-09 | 2012-07-18 | 同方威视技术股份有限公司 | X-ray checking system and method for transmitting data and signaling in system |
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| CN108514424B (en) * | 2018-04-26 | 2021-05-11 | 青岛大学附属医院 | Medical instrument internal medicine check out test set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102590237A (en) * | 2006-10-09 | 2012-07-18 | 同方威视技术股份有限公司 | X-ray checking system and method for transmitting data and signaling in system |
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