CN201041555Y - X-CT device with multi-scale imaging - Google Patents
X-CT device with multi-scale imaging Download PDFInfo
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- CN201041555Y CN201041555Y CNU2007201031746U CN200720103174U CN201041555Y CN 201041555 Y CN201041555 Y CN 201041555Y CN U2007201031746 U CNU2007201031746 U CN U2007201031746U CN 200720103174 U CN200720103174 U CN 200720103174U CN 201041555 Y CN201041555 Y CN 201041555Y
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Abstract
The utility model relates to an X-CT device which is provided with a multi-scale imaging range. The X-CT device comprises at least a radiation source arranged on the inner bottom seat of an isolation room; and at least a group of radiation imaging components at both sides of a sample stage; the imaging components consist of a front collimator arranged on one side of the sample stage, a rear collimator arranged on the other side of the sample stage, and an array detector; the radiation source is positioned on the left side of the front collimator; the central line of the radiation source, the front collimator, the rear collimator and the array detector is penetrated through the center of the sample stage; a data acquisition instrument and a computer are arranged on the outer side of the insulation room; the output terminals of the radiation source, the front collimator, the rear collimator and the array detector are respectively connected with the input terminal of the data acquisition instrument, and the output terminal of the data acquisition instrument is connected with the computer in order to process various datum input by the data acquisition instrument. Because a plurality of detectors are adopted, the device can conveniently realize the real-time imaging to the structures with different ranges in objects, and is in favor of comprehensive understanding to the object spatial structure from microscopic scale to macroscopic scale.
Description
Technical field
The utility model belongs to the computerized tomography field, be particularly related to a kind of adopt many group radiation sources and the different detector array combination of imaging precision, special object is carried out irradiation, and surveyed and digitizing, thereby realize a plurality of yardstick structures of interior of articles are given the X-CT with multiple dimensioned imaging function (Computer Tomograph) device of dynamic imaging with regard to its intensity in transmission.
Background technology
In recent years, along with the develop rapidly of micro-/ nano technology, the high-acruracy survey problem to all kinds of devices has been proposed.As everyone knows, general microscope is mainly used in the observation surface topography, but powerless to the detection of inner structure.People have invented a series of devices for this reason, as the stereoscope based on electrical impedance, magnetic field, sound, light, X ray, gamma-rays etc.The fluoroscopic image of finding the X-ray and obtaining staff since the roentgen rises, and this very competent ray of object penetration just is introduced in photography and imaging field, has formed many technical products.
Because X ray, gamma-rays etc. penetrate the very capable of object, thereby can be used for interior of articles is had an X-rayed.Wherein, X ray generally is the bremstrahlen that is produced in the process of slowing down with matter interaction by high-velocity electrons, gamma-rays is discharged in the nuclear decay process by radioactive isotope mainly then that (peace continues and just waits work, cobalt-60 digital radiation imaging vanning pick-up unit, Beijing: publishing house of Tsing-Hua University, 2003).In actinometry, when X, gamma-ray radiation photon and object take place to interact, photoelectric absorption, Compton scattering and electron pair can take place produce, X, when gamma-rays passes material, its photon can be partially absorbed; And, if differences such as the character of test substance and mass thicknesses, then survey screen and go up received signal intensity and can change to some extent, thereby measure these and change, just may extrapolate the heterogeneous texture characteristics of material inside, this is the ultimate principle of radiant image.
Usually, radiographic source can adopt realizations such as X-ray production apparatus, nucleic and accelerator, the conventional carriers that is used to measure, write down radiation intensity distribution is that the position fast-response probe generally comprises sensitive film, video screen and " image intensifier " etc., the resolution of this type of position sensitive sensor even can be in micron dimension, thereby can be used for detecting micro-structure.
Special needs to be pointed out is that little/imaging problem of receiving under the yardstick is very different with macroscopical situation, its characteristics are usually expressed as: the object naked eyes are invisible.When dimension of object during in the 1 μ m left and right sides, people are difficult to operate by the Direct observation of naked eyes, therefore need be undertaken by specific microscope, and all kinds of microscopes all have its corresponding range of observation, thereby be difficult to take into account imaging on the multiple yardstick, this information that is obtained on can causing from the microcosmic to the macro-scale disconnects mutually and is not complementary each other, and therefore, the microscope with multiple enlargement ratio and multiple degrees of freedom observation ability just seems very useful.
Summary of the invention
The purpose of this utility model is: at the single yardstick defective of existing CT technology, a kind of X-CT device with multiple dimensioned scope imaging function is provided, by adopting many group radiation sources and detector, tested object is carried out irradiation, and surveyed and digitizing, thereby realize the structure on a plurality of yardsticks of interior of articles is implemented multiple dimensioned dynamic imaging with regard to its intensity in transmission.Than existing X-CT device, the device that the utility model provides both can carry out imaging to the inner structure overall picture of large scale object, again can to this interior of articles more the range of observation on the small scale implement micro-imaging, thereby obtain the information overall picture on object is from the microcosmic to the macrostructure.This technology all obviously is different from existing device at aspects such as idea and even application, technical connotations, is expected playing a significant role aspect the test of small items.
The technical solution of the utility model is as follows:
The utility model provides a kind of X-CT device with multiple dimensioned imaging, comprising:
One base 8;
Be placed at least one radiation source 66 on the base 8 within the insulated chamber;
Be placed at least one group of radiant image assembly of sample stage 3 both sides on the base 8 within the insulated chamber; Described radiant image assembly is by the preceding collimating apparatus 2 that is placed on collimator slit 21 before the having of described sample stage 3 one sides, and is placed on behind the band from left to right of described sample stage 3 opposite sides the back collimating apparatus 5 and the detector array 7 of collimator slit 6 and forms; Described radiation source 66 is positioned at the left side of described preceding collimating apparatus 2;
The line of centres of described radiation source 66 and preceding collimating apparatus 2, back collimating apparatus 5 and detector array 7 passes the center of described sample stage 3; And
Be placed on a data collecting instrument 10 and computing machine 11 outside the insulated chamber;
The output terminal of described radiation source 66, preceding collimating apparatus 2, back collimating apparatus 5 and detector array 7 is connected to the input end of described data collecting instrument 10, described data collecting instrument 10 output terminals link to each other with computing machine 11, to handle the every data by described data collecting instrument 10 inputs.
Described radiant image assembly is the 1-10 group;
The imaging precision of described detector array 7 be 300nm to 1mm so that the radiator relative with it cooperates and to finish the imaging in the object particular dimensions scope, thereby obtain the multiple dimensioned structural information of target object;
Described radiation source 66 is an X-ray source, or Co-60, iridium Ir-192, thulium Tm-170 or the caesium Cs-137 of the initial mass that is placed on radiation source casing center in from 1 nanogram to 1 gram scope.
Collimating apparatus 2 and back collimating apparatus 5 are respectively tungsten or lead metal sheet before described.
Described detector array 7 is linear array scintillation crystal detectors, face battle array flat panel detector, image amplifier or digital X-ray cooled ccd camera.
Described example platform 3 carries out micro-displacement mechanism by step motor drive to be handled, and by computer control, changes the locus of sample as required, thereby obtains the image of different parts.
Described many group detectors place on the same slide rail, by computer control conversion position each other, thereby can obtain the structural images of object different range under same radiation source.
The global shape of the radiation source casing of described splendid attire radiation source 66 can be square, right cylinder or spheroid.
Described radiation source 66 can become one with preceding collimating apparatus 2, and preceding collimating apparatus 2 is arranged on radiation source 66 outlets; Described back collimating apparatus 5, detector array 7, and data collecting instrument can become one.
The detector of one or more pairs of different imaging precisions of employing of the present utility model and scope carries out irradiation to small items, and intensity in transmission surveyed and digitizing, thereby the multiple yardstick structure in its inside is implemented computerized tomography (Computer Tomograph-CT) device of dynamic imaging, wherein, radiation source 66, preceding collimating apparatus 2, example platform 3, back collimating apparatus 5, detector array 7 is integrated in order is arranged on the base 8; Example platform 3 is handled by micro-displacement mechanism, by computer control, can change the locus of sample as required, thereby obtain the image of different parts; Many group detectors also can place on the same slide rail, by the convertible position each other of computer control, thereby can obtain the structural images of object different range under same radiation source.Data collecting instrument connects detector array and computing machine, and data collecting instrument and computing machine be arranged in outside the insulated chamber, is convenient to operation.Package unit simple in structure, cost is low and easy and simple to handle, is a kind of X-CT device that can realize multiple dimensioned imaging simultaneously; And, by on the radiation path between object under test and the radiator, nanometer grating being set, also can be modulated to the ray on the object under test, thereby be reached more high-precision radiant image irradiation.And in traditional CT device, the imaging scope is generally more fixing and single, and large scale and small scale imaging can not take into account simultaneously, and the technology that the utility model provides helps to improve this deficiency.
In this device, the sample stage that is used for clamping or puts sample is fixed on micro-displacement platform by rotating shaft, and between forward and backward collimating apparatus, can move in upper and lower, left and right, Stepping Motor Control lower edge or rotate.Thus, the relative position of the X ray by adjusting sample and outgoing can obtain the space structure of sample.Particularly, lean on very closely as during at several nanoscales, can realize a kind of so-called near-field thermal radiation imaging, thereby obtain to surmount the result of conventional imaging precision when radiation source and detector.
In the utility model device, detector array adopts common detector array to get final product, such as, in device, can adopt linear array scintillation crystal detectors, face battle array flat panel detector, image amplifier or high accuracy number X-ray cooled ccd camera (High Resolution Digital X-ray cooled CCD Camera) etc.And the feasible processing micro-/ nano of current progress photodetector etc. becomes possibility, and this makes and adopts the detector of different spatial resolutions to become possibility at this device.
In a word, all kinds of devices that the utility model is related and sensor all are easy to buy or make, thereby a whole set of multiple dimensioned X-CT device is not difficult to realize.
Advantage of the present utility model is as follows:
Crucial part of the present utility model is the detector set of different imaging scopes and precision is lumped together, and realizes the structure imaging to the multiple yardstick of object simultaneously, and this is to the expansion of the single yardstick radiant image of tradition technology on technical concept.So far, multiple dimensioned X-CT device yet there are no report, and this integrated technology is expected to hew out the new application of CT instrument; And package unit is simple in structure, cost is low and easy and simple to handle.
Description of drawings
Accompanying drawing 1 is the principle schematic of the utility model radiant image;
Accompanying drawing 2 is a structural representation of the present utility model.
Embodiment
Further describe the utility model below in conjunction with the drawings and specific embodiments:
Embodiment 1:
Fig. 1 is the utility model radiant image schematic diagram, and as seen from the figure, employing imaging precision and the different detector of scope can be realized the radiant image to the multiple yardstick structure of object.Fig. 2 is a structural representation of the present utility model, also be embodiment, promptly adopt orthogonal one group of radiant image assembly that object is carried out irradiation, and adopt also orthogonal two-way detector that intensity in transmission is surveyed and digitizing, two detector image-forming precision differences, be respectively 300nm and 50 μ m, thereby can image the structure of its inside different scale.And, by on the radiation path between detector and the radiator, nanometer grating being set, also can be modulated to the ray on the object under test, thereby be reached more high-precision radiant image irradiation.
As shown in Figure 2, the X-CT device with multiple dimensioned imaging of the present utility model comprises:
One base 8;
Be placed at least one radiation source 66 on the base 8 within the insulated chamber;
Be placed at least one group of radiant image assembly of sample stage 3 both sides on the base 8 within the insulated chamber; Described radiant image assembly is by the preceding collimating apparatus 2 that is placed on collimator slit 21 before the having of described sample stage 3 one sides, and is placed on behind the band from left to right of described sample stage 3 opposite sides the back collimating apparatus 5 and the detector array 7 of collimator slit 6 and forms; Described radiation source 66 is positioned at the left side of described preceding collimating apparatus 2;
The line of centres of described radiation source 66 and preceding collimating apparatus 2, back collimating apparatus 5 and detector array 7 passes the center of described sample stage 3; And
Be placed on a data acquisition unit instrument 10 and computing machine 11 outside the insulated chamber;
The output terminal of described radiation source 66, preceding collimating apparatus 2, back collimating apparatus 5 and detector array 7 is connected to the input end of described data acquisition unit instrument 10, described data acquisition unit instrument 10 output terminals link to each other with computing machine 11, to handle the every data by described data acquisition unit instrument 10 inputs.
Described radiant image assembly is the 1-10 group;
The imaging precision of described detector array 7 be 300nm to 1mm so that the radiator relative with it cooperates and to finish the imaging in the object particular dimensions scope, thereby obtain the multiple dimensioned structural information of target object;
Described radiation source 66 is an X-ray source, or Co-60, iridium Ir-192, thulium Tm-170 or the caesium Cs-137 of the initial mass that is placed on radiation source casing center in from 1 nanogram to 1 gram scope.
Collimating apparatus 2 and back collimating apparatus 5 are respectively tungsten or lead metal sheet before described.
Described detector array 7 is linear array scintillation crystal detectors, face battle array flat panel detector, image amplifier or digital X-ray cooled ccd camera.
Described example platform 3 carries out micro-displacement mechanism by step motor drive to be handled, and by computer control, changes the locus of sample as required, thereby obtains the image of different parts.
Described many group detectors place together on the slide rail, by computer control conversion position each other, thereby can obtain the structural images of object different range under same radiation source.
The radiographic source that is used for imaging can have multiple choices, is X-ray source such as described radiation source 66, or Co-60, iridium Ir-192, thulium Tm-170 or the caesium Cs-137 of the initial mass that is placed on radiation source casing center in from 1 nanogram to 1 gram scope.
Such as directly adopting the X-X-ray machine X, also can adopt industrial conventional cobalt Co-60 defectoscope commonly used, its cobalt source radiation activity is little, can be below 11.1TBq (300Ci), and the thing that finally decays is stable isotope nickel (Ni), without any pollution, can be reclaimed by specialized company.In addition, radiographic source also can be selected for use in following a few class isotopes, as: in the scene that is starved of light mini-plant is detected, isotope iridium Ir-192 is a desirable radiographic source, its half life period is 74.3 days, gamma-rays is 0.31,0.47 and 0.6MeV, generally is mainly used to detect the steel that thickness is 3～75mm; In addition, also can select thulium Tm-170 for use, 129 days its half life period, gamma-rays 0.084,0.052MeV, generally being mainly used to detect thickness is the steel of 0.8mm or the aluminium of 13mm, can be used for the detection of intraware such as aircraft parts and compound substance; Certainly, also can select caesium Cs-137 for use, 30.1 its half life period, gamma-rays 0.66MeV.These radiographic sources are easy to produce in professional production enterprise, and the user can directly buy or customize, and can regularly replace and be used for new imaging.So the related radiation component of the utility model is easy to realize.
When realizing the utility model, computer acquisition and processing can adopt desk-top computer or notebook computer to finish.Package unit is positioned in the insulated chamber except that computing machine 11 and data collecting instrument 10; Insulated chamber is made by heavy metals tungsten or lead, and its wall thickness is that 1cm is to 1mm.
Radiographic source is packaged in the center of radiation source casing, and the radiation source box shape can be square, right cylinder or spheroid.
The sample stage 3 that is used for clamped sample is arranged on the micrometric displacement sample stage of insulated chamber bottom, can move in upper and lower, left and right, Stepping Motor Control lower edge or rotate.Thus, the relative position of the X ray by adjusting sample and outgoing can obtain the space structure of sample.Particularly, lean on very closely as during at several nanoscales, can realize a kind of so-called near-field thermal radiation imaging, thereby obtain to surmount the result of conventional imaging precision when radiation source and detector.
In the utility model device, detector array 7 adopts conventional detector array to get final product, such as, in device, can adopt linear array scintillation crystal detectors, face battle array flat panel detector, image amplifier or high accuracy number X-ray cooled ccd camera (High Resolution Digital X-ray cooled CCD Camera) etc.And current progress has made processing micro-/ nano photodetector become possibility, and this makes the space exploration resolution of this device be expected further to be improved.In this device, forward and backward collimating apparatus is made by heavy metals tungsten, lead, and its center has size in first slit 21, second slit 6 of 5mm * 5mm to 0.1mm * 0.1mm, sees through for ray.
Provided by the utility model small items is carried out the CT device of multiple dimensioned tomography, its use-pattern is as follows: sample is clamped to the center pit of specimen holder and fixes, open computing machine.So, by computer control, open radiographic source 66, radiographic source promptly carries out radiation outwardly, via the preceding collimating apparatus slit 21 of collimating apparatus before the multichannel 2, arrives sample, arrive the back collimating apparatus slit 6 of collimating apparatus 5 after the multichannel again, on multichannel array detector 7, can carry out digital reconstruction by data collecting instrument 10 and computing machine 11, obtain the inner structure of sample thus in real time.Because the two pairs of detectors and radiographic source are worked simultaneously, and detector imaging precision difference separately, this has just realized the imaging on the multiple yardstick.
The most outstanding being also advantageous in that of multiple dimensioned CT device that the utility model provides eliminated conventional apparatus and can only have been carried out the deficiency of imaging to single yardstick object, thus use more convenient flexibly, also expanded its purposes greatly.
Fig. 2 is the structural representation of present embodiment; Radiant image assembly in the present embodiment is two groups; Certainly also can one be three groups or four groups even many groups as required; The line of centres of each device of every group of radiant image assembly passes the center of sample stage.
Embodiment 2:
Present embodiment and embodiment 1 unique difference is that detector 7 places on the same slide rail, comes conversion position each other by computer control, thereby can be obtained the structural images of object different range by these detectors according to this under same radiation source.In the multiple dimensioned CT device that this structure realizes, can save radiogenic quantity, but, then exist certain not enough if need simultaneously multiple yardstick to be carried out imaging.
Claims (8)
1. X-CT device with multiple dimensioned imaging comprises:
One base (8);
Be placed at least one radiation source (66) on the base (8) within the insulated chamber;
Be placed at least one group of radiant image assembly of sample stage (3) both sides on the base (8) within the insulated chamber; Described radiant image assembly is by the preceding collimating apparatus (2) that has preceding collimator slit (21) that is placed on described sample stage (3) one sides, and is placed on behind the band from left to right of described sample stage (3) opposite side the back collimating apparatus (5) and the detector array (7) of collimator slit (6) and forms; Described radiation source (66) is positioned at the left side of described preceding collimating apparatus (2);
Described radiation source (66) and preceding collimating apparatus 2), the line of centres of back collimating apparatus (5) and detector array (7) passes the center of described sample stage (3); And
Be placed on a data acquisition unit instrument (10) and computing machine (11) outside the insulated chamber;
The output terminal of described radiation source (66), preceding collimating apparatus (2), back collimating apparatus (5) and detector array (7) is connected to the input end of described data collecting instrument (10), described data collecting instrument (10) output terminal links to each other with computing machine (11), to handle the every data by described data collecting instrument (10) input.
2. by the described X-CT device of claim 1, it is characterized in that described radiant image assembly is the 1-10 group with multiple dimensioned imaging;
3. by the described X-CT device of claim 1, it is characterized in that the imaging precision of described detector array (7) is that 300nm is to 1mm with multiple dimensioned imaging;
4. by the described X-CT device of claim 1 with multiple dimensioned imaging, it is characterized in that, described radiation source (66) is an X-ray source, or Co-60, iridium Ir-192, thulium Tm-170 or the caesium Cs-137 of the initial mass that is placed on radiation source casing center in from 1 nanogram to 1 gram scope.
5. by the described X-CT device of claim 1, it is characterized in that described preceding collimating apparatus (2) and back collimating apparatus (5) are respectively tungsten or lead metal sheet with multiple dimensioned imaging.
6. by the described X-CT device of claim 1, it is characterized in that described detector array (7) is linear array scintillation crystal detectors, face battle array flat panel detector, image amplifier or digital X-ray cooled ccd camera with multiple dimensioned imaging scope.
7. by the described X-CT device of claim 1 with multiple dimensioned imaging scope, it is characterized in that described example platform (3) carries out micro-displacement mechanism by step motor drive to be handled, by computer control, change the locus of sample as required, thereby obtain the image of different parts.
8. by the described X-CT device of claim 1 with multiple dimensioned imaging scope, it is characterized in that, described many group detectors place together on the slide rail, by computer control conversion position each other, thereby can obtain the structural images of object different range under same radiation source.
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007201031746U CN201041555Y (en) | 2007-01-11 | 2007-01-11 | X-CT device with multi-scale imaging |
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| CNU2007201031746U CN201041555Y (en) | 2007-01-11 | 2007-01-11 | X-CT device with multi-scale imaging |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243188A (en) * | 2011-04-21 | 2011-11-16 | 河海大学 | Platform and method for industrial computerized tomography (ICT) imaging, wireless streaming media data processing, and three dimensional reconstruction |
| CN106568787A (en) * | 2016-10-20 | 2017-04-19 | 中国工程物理研究院激光聚变研究中心 | Laser-based microfocus gamma-ray CT device and realization method thereof |
| CN110857851A (en) * | 2018-08-24 | 2020-03-03 | 东莞中科蓝海智能视觉科技有限公司 | Optical cable measuring device |
-
2007
- 2007-01-11 CN CNU2007201031746U patent/CN201041555Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102243188A (en) * | 2011-04-21 | 2011-11-16 | 河海大学 | Platform and method for industrial computerized tomography (ICT) imaging, wireless streaming media data processing, and three dimensional reconstruction |
| CN102243188B (en) * | 2011-04-21 | 2013-07-03 | 河海大学 | Platform and method for industrial computerized tomography (ICT) imaging, wireless streaming media data processing, and three dimensional reconstruction |
| CN106568787A (en) * | 2016-10-20 | 2017-04-19 | 中国工程物理研究院激光聚变研究中心 | Laser-based microfocus gamma-ray CT device and realization method thereof |
| CN110857851A (en) * | 2018-08-24 | 2020-03-03 | 东莞中科蓝海智能视觉科技有限公司 | Optical cable measuring device |
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Granted publication date: 20080326 Termination date: 20160111 |