CN105739232B - A kind of real-time stereo imaging system and imaging method based on synchrotron radiation - Google Patents
A kind of real-time stereo imaging system and imaging method based on synchrotron radiation Download PDFInfo
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- CN105739232B CN105739232B CN201610118509.5A CN201610118509A CN105739232B CN 105739232 B CN105739232 B CN 105739232B CN 201610118509 A CN201610118509 A CN 201610118509A CN 105739232 B CN105739232 B CN 105739232B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B42/00—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
- G03B42/02—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means using X-rays
- G03B42/021—Apparatus for direct X-ray cinematography
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B42/00—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
- G03B42/02—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means using X-rays
- G03B42/026—Obtaining records using waves other than optical waves; Visualisation of such records by using optical means using X-rays for obtaining three-dimensional pictures
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Abstract
The present invention relates to a kind of real-time stereo imaging system and imaging method based on synchrotron radiation, wherein, the system includes synchrotron radiation X-ray source；It is arranged on the light billows with two light holes of synchrotron radiation X-ray source outlet side；Capillary device at two two light holes for being separately mounted to the smooth billows；The sample stage for being used to place sample being arranged at the intersection location by the two light beams after the capillary device；It is arranged on the x-ray imaging detector of the sample stage side；And the data processing equipment being connected with the x-ray imaging detector.Compared with Traditional x-ray CT technologies, the temporal resolution that the present invention is imaged greatly promotes, and can carry out real time imagery, and reduce the dosage of sample raying.
Description
Technical field
The present invention relates to a kind of x-ray imaging system and method, more particularly to a kind of real-time based on synchrotron radiation
Stereo imaging system and imaging method.
Background technology
In visible ray, technique of binocular stereoscopic vision has obtained very big development in recent years, and it is to be based on principle of parallax, by
Twin camera obtains two width digital pictures of same object simultaneously from different perspectives, recovers the side of object dimensional geological information
Method.As technique of binocular stereoscopic vision is in nearly two developing rapidly during the last ten years, gradually improve and be applied to robot regarding
Feel many fields such as navigation, aerial mapping, medical imaging and industrial detection.
X-ray imaging technology based on synchrotron radiation is generally divided into two classes, is two-dimensional x-ray photography and three-dimensional X respectively
Ray CT technologies.
Two-dimensional x-ray photography is judged using the difference (density and thickness) of X ray absorbability matter in media as well
Sample interior structure, more than high 10 magnitudes of the brightness of the more common X-ray machine of the brightness of synchrotron radiation X-ray, therefore it is based on
The two-dimensional x-ray photography of synchrotron radiation can carry out real time imagery.As shown in figure 1, synchrotron radiation two-dimensional x-ray photographic system
Mainly include：Two to the synchrotron radiation X-ray source 10 of the transmitting synchrotron radiation X-ray 11 of sample 12 and for obtaining sample 12
Tie up the imaging detector 13 of projected image 14.However, the imaging results of two-dimensional x-ray photography are the weights of each depth component of sample
Folded projection, cannot be distinguished by the depth information of projection, and the structure to be forward lapped to those in sample is difficult to find, it is easy to cause pair
The false judgment of sample interior structure.
X-ray ct technology is reconstructed to obtain by a large amount of two-dimension projections in 0~180 degree of sample, its combine absorb contrast or
Phase contrast imaging technology can realize the Accurate Reconstruction of sample three-dimensional information.As shown in Fig. 2 synchrotron radiation X-ray CT system
Including：Synchrotron radiation X-ray source 21, detector 23 and the sample stage for being used to place sample 22 being arranged between, its
In, by rotating against between sample and synchrotron radiation X-ray source 21 and detector 23, obtain the throwing of sample different angle
Shadow image 24, projected image 24 is then inputted into computer 25, sectional slice 26 is calculated by image reconstruction algorithm, that is, rebuild
Image.But because 3 D X-ray CT technologies need to carry out sample substantial amounts of rotation projection, the time of imaging can be greatly increased
With the irradiated dosage of sample, therefore, it is impossible to or be difficult to real-time monitored experiment, particularly biological sample living is carried out real
When be imaged, there is significant limitation.
The content of the invention
In order to solve the above-mentioned problems of the prior art, the present invention is intended to provide a kind of real-time X based on synchrotron radiation
Ray stereo imaging system and imaging method, to realize real-time three-dimensional X ray three-dimensional imaging, and reduce the agent of sample raying
Amount.
A kind of real-time stereo imaging system based on synchrotron radiation described in one of present invention, it includes：
Synchrotron radiation X-ray source；
The light billows with two light holes of synchrotron radiation X-ray source outlet side are arranged on, it is by the synchronous spoke
The synchrotron radiation X-ray for penetrating x-ray source output is divided into two light beams；
Capillary device at two two light holes for being separately mounted to the smooth billows, two capillary devices
Change the direction of propagation of the two light beams passed through from the smooth billows respectively, so that the two light beams intersect；
The sample for being used to place sample being arranged at the intersection location by the two light beams after the capillary device
Platform, so that the two light beams cross-fire that the sample is propagated along different directions；
The x-ray imaging detector of the sample stage side is arranged on, it detects the two-beam gone out from the sample transmission
Beam, and obtain the sample projected image of two width different angles；And
The data processing equipment being connected with the x-ray imaging detector, it is according to the sample of the two width different angle
Projected image, recover the three-dimensional information of the sample, to obtain sample stereo-picture.
In the above-mentioned real-time stereo imaging system based on synchrotron radiation, each capillary device includes：
Capillary optics element and the capillary governor motion for adjusting the capillary optics position of components.
In the above-mentioned real-time stereo imaging system based on synchrotron radiation, the capillary optics element is more
Capillary X-ray lens.
In the above-mentioned real-time stereo imaging system based on synchrotron radiation, the capillary governor motion is five
Governor motion is tieed up, it includes three-dimensional translating regulation clamp mechanism and for adjusting the pivot angle of the capillary optics element and throwing angle
Two dimension angular regulation clamp mechanism.
In the above-mentioned real-time stereo imaging system based on synchrotron radiation, the sample stage is adjusted for three-dimensional translating
Save sample stage.
In the above-mentioned real-time stereo imaging system based on synchrotron radiation, the smooth billows include having two institutes
State the stereotype of light hole.
In the above-mentioned real-time stereo imaging system based on synchrotron radiation, the thickness of the stereotype is 2mm, often
A diameter of 3-5mm of the individual light hole, and the center spacing of two light holes is 20-40mm.
A kind of real-time stereoscopic imaging method based on synchrotron radiation described in the two of the present invention, it includes following step
Suddenly：
Step S1, synchrotron radiation X-ray is sent using synchrotron radiation X-ray source, pass through the light billows with two light holes
The synchrotron radiation X-ray is divided into two light beams, and changes the propagation of the two light beams respectively by two capillary devices
Direction, so that the two light beams cross-fire is on the sample on the sample stage at the two light beams intersection location；
Step S2, the two light beams gone out by the detection of x-ray imaging detector from the sample transmission, and obtain two width not
With the sample projected image of angle；And
Step S3, the sample projected image by data processing equipment according to the two width different angle, recovers the sample
The three-dimensional information of product, to obtain sample stereo-picture.
As a result of above-mentioned technical solution, the present invention is by using the light billows and two with two light holes
Individual capillary device will send synchrotron radiation X-ray from synchrotron radiation X-ray source and be divided into the light beam of two beam different directions, and make sample
Product are placed in the intersection of two light beams, while the sample projected image of two width different angles is obtained by x-ray imaging detector,
Recover the three-dimensional information of the sample using binocular parallax principle finally by data processing equipment, so as to obtain sample stereogram
Picture.The present invention can once complete X ray three-dimensional imaging in real time, a large amount of data for projection be obtained without rotary sample, so as to big
Big temporal resolution of having deducted a percentage (up to millisecond magnitude), reduces imaging time and the dosage of sample raying.
Brief description of the drawings
Fig. 1 is the structural representation of synchrotron radiation two-dimensional x-ray photographic system；
Fig. 2 is the structural representation of synchrotron radiation X-ray CT system；
A kind of structure top view of the real-time stereo imaging system based on synchrotron radiation of Fig. 3 present invention；
Fig. 4 is the cartesian coordinate system and two width sample projected image parallax relations that sample three-dimensional information is obtained in the present invention
Schematic diagram；
Fig. 5 is the schematic diagram of the gray value correlation curve of the same layer of two width sample projected images in the present invention.
Embodiment
Below in conjunction with the accompanying drawings, presently preferred embodiments of the present invention is provided, and is described in detail.
As shown in figure 3, one of present invention, i.e., a kind of real-time stereo imaging system based on synchrotron radiation, including：
Synchrotron radiation X-ray source 1；
The light billows 2 with two light holes of the outlet side of synchrotron radiation X-ray source 1 are arranged on, it is by synchrotron radiation X-ray
The synchrotron radiation X-ray that source 1 exports is divided into two light beams；
Capillary device 3 at two two light holes for being separately mounted to light billows 2, two capillary devices 3 are distinguished
Change the direction of propagation of the two light beams passed through from light billows 3, so that the two light beams intersect；
The sample stage 4 for being used to place sample being arranged at the intersection location by the two light beams after capillary device 3,
So that the cross-fire of two light beams 7 that sample is propagated along different directions；
The x-ray imaging detector 5 of the side of sample stage 4 is arranged on, it detects the two light beams gone out from sample transmission, and obtains
Obtain the sample projected image of two width different angles；And
The data processing equipment 6 being connected with x-ray imaging detector 5, it is according to the sample perspective views of two width different angles
Picture, recover the three-dimensional information of sample, to obtain sample stereo-picture.
In the present embodiment, light billows 2 include the stereotype with two light holes, and the wherein thickness of stereotype is 2mm, Mei Getong
A diameter of 3-5mm of unthreaded hole, and the center spacing of two light holes is 20-40mm.
In the present embodiment, each capillary device 3 includes：Capillary optics element and for adjusting the capillary light
The capillary governor motion of position of components is learned, wherein, capillary optics element is that (it is using X ray for multiple capillary x-ray lens
Total reflection principle changes x-ray transmission direction), capillary governor motion is five dimension governor motions, and it is flat that it includes three-dimensional (X-Y-Z)
Dynamic regulation clamp mechanism and the pivot angle for adjusting capillary optics element adjust clamp mechanism with the two dimension angular for throwing angle.
In the present embodiment, sample stage 4 is that three-dimensional (X-Y-Z) translation adjusts sample stage.
In the present embodiment, can be by 40mm (length) × 5mm (width) strip synchronization spoke using two capillary devices 3
Penetrate X-ray light spot to deflect from both ends respectively, form two-beam spot cross-fire sample；Two-beam spot is in x-ray imaging detector 5
On projection spacing be 60mm (suitable with human eye interpupillary distance)；Sample is 800mm apart from the plan range of x-ray imaging detector 5；Two
Deflect beam angle：θ=2 × arctan (30/800)=4.3 °；Beam deflection angle degree is respectively θ/2=by two focusing capillaries
2.15°；Incident beam plan range sample distance is 40 × 800/60=533mm；The length of capillary optics element is 300-
400mm, opening diameter 3-5mm.
In the present invention, data processing equipment 6 is recovered using binocular parallax principle to the three-dimensional information of sample, wherein
For parallax relation as shown in figure 4, XOY is cartesian coordinate system, O is sample geometric center；A (X, Y) is sample a little in flute card
Coordinate in your coordinate system；θ is the angle of two light beams in Fig. 3；O1, A1, O2, A2 are respectively that sample corresponds to two light beams 7
Subpoint；X1, X2 are respectively projected length O1A1, O2A2 of two light beams 7；Y is sample depth, and therefore, corresponding depth is public
Formula is：Y=(X2-X1)/(2tan (θ/2)).
Based on said structure and principle, the two of the present invention, i.e., a kind of real-time three-dimensional imaging side based on synchrotron radiation
Method, following steps：
Step S1, synchrotron radiation X-ray is sent using synchrotron radiation X-ray source 1, pass through the light billows with two light holes
Synchrotron radiation X-ray is divided into two light beams by 2, and changes the propagation side of the two light beams respectively by two capillary devices 3
To so that the cross-fire of two light beams 7 is on the sample on the sample stage 4 at the two light beams intersection location；
Step S2, the two light beams gone out from sample transmission are detected by x-ray imaging detector 5, and it is different to obtain two width
The sample projected image of angle；And
Step S3, the sample projected image by data processing equipment 6 according to two width different angles, recover the three-dimensional of sample
Information, to obtain sample stereo-picture.
Above-mentioned steps S3 can use technology well known in the art to realize that specifically, step S3 is specifically included：
Step S31, the gray value data of the current layer of the sample projected image of two width different angles is taken out, to establish two
(as shown in figure 5, the longitudinal axis is the gray value of projected image, transverse axis is the coordinate value of projected image to bar correlation curve, wherein two width are thrown
Shadow image general trend and corresponding gray value are roughly the same, simply there is small displacement in X direction), and by this two
As characteristic point, (crest value and valley value of two correlation curves correspond to gray value and become the crest value and valley value of correlation curve
The extreme value of change)；
Step S32, extracts characteristic point, and by each characteristic point in the sample projected image of two width different angles corresponding to
Subpoint is matched, and abscissa value corresponding to record；Checking matching is carried out except other points that characteristic point is thought then are segmented, and
Abscissa value corresponding to record；Finally the mathematic interpolation of the abscissa according to corresponding to the characteristic point of matching goes out sample in current layer
Three-dimensional information (i.e. sample depth Y), and export a slice of data；
Step S33, step S31 is repeated, until calculating three-dimensional information of the sample at each layer；
Step S34, by the three-dimensional display system outside the importing of all slice of datas, (three-dimensional display system is this area
Conventional system), to obtain sample stereo-picture
In above-mentioned steps S32, the matching for characteristic point, specifically include：By all crests on two curves, ripple
Valley takes out in order, obtains each crest, abscissa corresponding to valley value；Because visual angle is different, on curve the quantity of crest and
The size of gray value can vary slightly, and go matching with more crest, trough with the curve with less crest, trough in order
Curve, the point of gray value difference smaller (for example, the relative interpolation of gray value less than 0.1%) is match point, is thus obtained
Corresponding abscissa, i.e. matching obtain characteristic point (crest, trough) abscissa (by taking Fig. 5 as an example, point A and point A', point B and point
B', point C and point C' and point D and point D' are the characteristic point matched).
In above-mentioned steps S32, for the matching for other points thought except characteristic point, specifically include：In the spy matched
(such as the line segment AB in Fig. 5 and line segment A'B') is levied on the line segment between point (crest and trough), it is bent to take out two contrasts in proportion
Point corresponding on corresponding line segment in line, whether checking gray value is close (to need a default parameter, the parameter during judgement
Selection regarding different samples depending on, although this method in the presence of certain error, have it is simple, efficiently, it is quick excellent
Point), corresponding point in this two lines section is matched if close, the similar click-through of gray value in the vertex neighborhood is found if not close
Row matching, corresponding abscissa is thus obtained, i.e. matching obtains the abscissa of other points.
Above-described, only presently preferred embodiments of the present invention is not limited to the scope of the present invention, of the invention is upper
Stating embodiment can also make a variety of changes.What i.e. every claims and description according to the present patent application were made
Simply, equivalent changes and modifications, the claims of patent of the present invention are fallen within.The not detailed description of the present invention is
Routine techniques content.
Claims (8)
1. a kind of real-time stereo imaging system based on synchrotron radiation, it is characterised in that the system includes：
Synchrotron radiation X-ray source；
The light billows with two light holes of synchrotron radiation X-ray source outlet side are arranged on, it penetrates the synchrotron radiation X
The synchrotron radiation X-ray of line source output is divided into two light beams；
Capillary device at two two light holes for being separately mounted to the smooth billows, two capillary device difference
Change the direction of propagation of the two light beams passed through from the smooth billows, so that the two light beams intersect；
The sample stage for being used to place sample being arranged at the intersection location by the two light beams after the capillary device, with
Make the two light beams cross-fire that the sample is propagated along different directions；
The x-ray imaging detector of the sample stage side is arranged on, it detects the two light beams gone out from the sample transmission, and
Obtain the sample projected image of two width different angles；And
The data processing equipment being connected with the x-ray imaging detector, it is projected according to the sample of the two width different angle
Image, recover the three-dimensional information of the sample, to obtain sample stereo-picture.
2. the real-time stereo imaging system according to claim 1 based on synchrotron radiation, it is characterised in that each
The capillary device includes：Capillary optics element and the capillary for adjusting the capillary optics position of components are adjusted
Mechanism.
3. the real-time stereo imaging system according to claim 2 based on synchrotron radiation, it is characterised in that described
Capillary optics element is multiple capillary x-ray lens.
4. the real-time stereo imaging system according to claim 2 based on synchrotron radiation, it is characterised in that described
Capillary governor motion is five dimension governor motions, and it includes three-dimensional translating regulation clamp mechanism and for adjusting the capillary light
The pivot angle for learning element and the two dimension angular regulation clamp mechanism for throwing angle.
5. the real-time stereo imaging system according to claim 1 based on synchrotron radiation, it is characterised in that described
Sample stage is that three-dimensional translating adjusts sample stage.
6. the real-time stereo imaging system according to claim 1 based on synchrotron radiation, it is characterised in that described
Light billows include the stereotype with two light holes.
7. the real-time stereo imaging system according to claim 6 based on synchrotron radiation, it is characterised in that described
The thickness of stereotype is 2mm, a diameter of 3-5mm of each light hole, and the center spacing of two light holes is 20-
40mm。
8. a kind of real-time stereoscopic imaging method based on synchrotron radiation, it is characterised in that methods described includes following step
Suddenly：
Step S1, synchrotron radiation X-ray is sent using synchrotron radiation X-ray source, by the light billows with two light holes by institute
State synchrotron radiation X-ray and be divided into two light beams, and change the direction of propagation of the two light beams respectively by two capillary devices,
So that the two light beams cross-fire is on the sample on the sample stage at the two light beams intersection location；
Step S2, the two light beams gone out by the detection of x-ray imaging detector from the sample transmission, and obtain two width difference angles
The sample projected image of degree；And
Step S3, the sample projected image by data processing equipment according to the two width different angle, recovers the sample
Three-dimensional information, to obtain sample stereo-picture.
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| RU2628868C1 (en) * | 2016-07-22 | 2017-08-22 | Российская Федерация, от имени которой выступает Госкорпорация "Росатом" | Method of neutron radiography and installation for its implementation |
| CN106802428B (en) * | 2017-01-19 | 2019-01-01 | 中国科学院上海应用物理研究所 | A kind of x-ray imaging detector of radiation hardness and high heat load |
| CN111553871B (en) * | 2019-03-27 | 2023-06-16 | 上海交通大学 | Method for judging concentration of metal element in binary alloy by using gray value of synchronous radiation in-situ imaging image |
| CN110441342B (en) | 2019-08-09 | 2021-06-11 | 大连理工大学 | Method for accurately representing three-dimensional orientation and crystallographic orientation of crystal |
| CN113866193A (en) * | 2021-10-14 | 2021-12-31 | 北京市辐射中心 | X-ray stereo imaging device and method thereof |
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| DE3018541A1 (en) * | 1980-05-14 | 1981-11-19 | Siemens AG, 1000 Berlin und 8000 München | Stereo X=ray appts. with two X=ray tubes - has central unit coupled to and controlling memory system between TV camera and playback |
| CN1136587C (en) * | 2001-06-01 | 2004-01-28 | 中国科学院上海光学精密机械研究所 | X-ray holographic microscope with preamplification |
| US7693256B2 (en) * | 2008-03-19 | 2010-04-06 | C-Rad Innovation Ab | Phase-contrast X-ray imaging |
| CN202168831U (en) * | 2011-07-20 | 2012-03-21 | 董绍康 | Medical X-ray digital stereo photographic system |
| JP2013128661A (en) * | 2011-12-21 | 2013-07-04 | Canon Inc | Stereo x-ray imaging apparatus and stereo x-ray imaging method |
| CN103091700A (en) * | 2013-01-09 | 2013-05-08 | 中国科学院空间科学与应用研究中心 | Satellite-borne pulsar X-ray spectrometer |
| CN103226114B (en) * | 2013-04-02 | 2015-09-30 | 清华大学 | Various visual angles stereoscopic radiation imaging system and method |
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