CN102626318A - X-ray imaging method - Google Patents
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- CN102626318A CN102626318A CN2012101089225A CN201210108922A CN102626318A CN 102626318 A CN102626318 A CN 102626318A CN 2012101089225 A CN2012101089225 A CN 2012101089225A CN 201210108922 A CN201210108922 A CN 201210108922A CN 102626318 A CN102626318 A CN 102626318A
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Abstract
The invention discloses an X-ray imaging method which comprises the following steps of: acquiring information of an object to be measured, establishing a size model of the object to be measured; regulating light beams of X-rays according to the size model of the object to be measured, scanning the object to be measured to obtain scanning information of the object to be measured; and reconstructing the scanning information to obtain a reconstructed image. In the X-ray imaging method, through establishing the size model of the object to be measured, and regulating the X-ray light beams according to the size model of the object to be measured, the light beams cover the object to be measured, thus output of excessive X-rays is avoided, and unnecessary hurt is reduced.
Description
[technical field]
The present invention relates to the nuclear imaging technical field, particularly relate to a kind of x-ray imaging method.
[background technology]
The x-ray imaging technology is the X-ray detection X technology; The new and high technology that computer technology and Computational Physics combine; Its image-forming principle is to utilize the object each several part to different these characteristics of the decay of X line; Receive X ray through the transmitted intensity behind the object and with its digitized by X-ray detector, thereby reflect different organizational structuries.Panoramic shooting, CT scan are the different mode of x-ray imaging, realize through different mechanical scanning modes.X-ray source and detector are installed in respectively by the both sides of scanning tissue, and direction is relative.The X ray that produces when x-ray source passes by the scanning tissue, and the residual ray that sees through tissue is received by detector.Detector is extremely sensitive to X ray; It becomes the X ray that receives into analogue signal earlier, is transformed to digital signal again, imports the central processing system of computer then; Reappear two dimension or three-dimensional image through corresponding algorithm for reconstructing, show through display device again.
In traditional x-ray imaging technology, for interesting areas is scanned, testee will receive the irradiation of large-scale X ray, tends to absorb a large amount of X ray.The physics that X ray had, chemistry and biochemical action cause various effects, have hazardness, as: destroy the chemical bond of material, promote the synthetic of novel substance; Make material send fluorescence etc.Therefore, shine X ray on a large scale, it is unnecessary that a lot of X ray must be arranged, and the radiation meeting of these unnecessary X ray causes unnecessary damages to testee.
[summary of the invention]
Based on this, be necessary to provide a kind of x-ray imaging method that reduces the unnecessary injury that X-radiation brings.
A kind of x-ray imaging method is characterized in that, may further comprise the steps: gather testee information, set up the testee dimension model; Regulate the X ray light beam according to said testee dimension model, said testee is scanned, obtain the scanning information of testee; Said scanning information rebuild obtain reconstructed image.
Therein among embodiment, said collection testee information, the step of setting up the testee dimension model comprises: respectively said testee is carried out prescan through at least two different angles, obtain the prescan information of said testee; Set up the testee dimension model according to said prescan information.
Therein among embodiment; Saidly respectively the step that said testee carries out prescan is specially through at least two different angles: respectively said testee is carried out prescan through two different angles, the angle between two different angles more than or equal to 90 degree less than 180 degree.
Therein among embodiment, said collection testee information, the step of setting up the testee dimension model comprises: confirm the classification of said testee, obtain the type of testee; Obtain the common-use size model of same type objects according to the type of said testee; Common-use size model according to said same type objects obtains the testee dimension model.
Therein among embodiment; Said according to said testee dimension model adjusting X ray light beam; Testee is scanned, and the step that obtains the scanning information of testee comprises: size and the center of confirming the regional area of said testee according to said testee dimension model; The X-ray scanning central point is positioned on the center of regional area of said testee; With said sweep center point is center rotation, and according to the size real-time regulated X ray light beam of said regional area, said regional area is rotated scanning, obtains the partial sweep information of said testee.
Therein among embodiment; Said according to said testee dimension model adjusting X ray light beam; Said testee is scanned, and the step that obtains the scanning information of testee comprises: the datum line of confirming said testee according to said testee dimension model; Adjust scanning angle, and the X-ray scanning central point is positioned on the datum line all the time, regulate the X ray light beam according to the dimension model of testee simultaneously, said testee is carried out the scanning of multi-angle, obtain the scanning information of testee.
Therein among embodiment, the said mode that said testee is carried out the scanning of multi-angle, the scanning information that obtains testee is specially: said testee is carried out the scanning of multi-angle pulsed, obtain the scanning information of the testee of each angle.
Therein among embodiment, the said mode that said testee is carried out the scanning of multi-angle is specially: said testee is carried out multi-angle continuous sweep, obtain the scanning information of the successive testee of multi-angle.
Therein among embodiment; Saidly said scanning information is rebuild the step that obtains reconstructed image be specially: said scanning information is rebuild the two dimensional image that obtains testee, said two dimensional image is carried out the 3-D view that three-dimensional reconstruction obtains testee.
In the above-mentioned x-ray imaging method, through setting up the testee dimension model, and, light beam is only covered to testee, avoided the output of unnecessary X ray, reduce unnecessary damages according to testee dimension model adjustment X ray light beam.
[description of drawings]
Fig. 1 is the sketch map of traditional X-ray radial imaging;
Fig. 2 is the flow chart of the x-ray imaging method of an embodiment;
Fig. 3 is the particular flow sheet of step S100 shown in Figure 2;
Fig. 4 is the sketch map of step S100 shown in Figure 2;
Fig. 5 is the sketch map of step S200 shown in Figure 1;
Fig. 6 is the sketch map of diaphragm 19 shown in Figure 5;
Fig. 7 is the particular flow sheet of step S200 shown in Figure 1;
Fig. 8 is the concrete sketch map of step S200 shown in Figure 7;
The sketch map that X ray penetrates testee for twice appears in Fig. 9 when being scanning;
Figure 10 is the particular flow sheet of step S200 among another embodiment;
Figure 11 is the concrete sketch map of step S200 shown in Figure 10;
Figure 12 is again the particular flow sheet of an embodiment step S100.
[specific embodiment]
In order to solve in traditional x-ray imaging technology, shine X ray on a large scale, the radiation of unnecessary X ray causes the problem of unnecessary damages to testee, has proposed a kind of x-ray imaging method that reduces the unnecessary injury that X-radiation brings.
According to the x-ray imaging technological know-how, see also Fig. 1, the x-ray bombardment that x-ray source 11 produces is to testee; Different piece is different to the degree that X ray absorbs on the testee; X ray penetrates testee and finally projects on the detector 13, and detector 13 is transformed into analogue signal earlier with the X ray that receives, and is converted into the central processing system of input computer behind the digital signal again; Reappear two dimension or three-dimensional image through corresponding algorithm for reconstructing, and show through display device.The direction of the vertical directive detector 13 of the ray that x-ray source 11 sends is the X ray incident direction; Be sweep center point 15 a bit on x-ray source 11 to the detector 13 on the incident direction; X-ray source 11 often is on the same cantilever with detector 13; Cantilever can be that the center is rotated with sweep center point 15, makes x-ray source 11 can carry out the scanning of multi-angle to object.
As can be seen from Figure 1, in order to cover whole testee, traditional x-ray imaging technology can discharge too much more than X ray, these rays can cause unnecessary harm.Nowadays; X ray has been used for aspects such as medical diagnosis, industrial lossless detection, social safety inspection; During the Games for university students in 2011; Use is just suspended owing to the unnecessary X ray of X ray screening machine leaks in the Shenzhen Metro security check, and it is necessary therefore to have proposed the less x-ray imaging method of a kind of X-radiation dosage.
See also Fig. 2, the x-ray imaging method of present embodiment may further comprise the steps:
Step S100 gathers testee information, sets up the testee dimension model.Set up the dimension model of testee through the information of gathering testee, grasp the actual size size of object.It should be noted that; The testee here can be a concrete object; Also can be certain part in a certain big object, when the people is carried out safety check, your waist scanned to confirm whether it carries prohibited items; Need the just part of the person to be detected this moment, rather than whole people's whole body.
See also Fig. 3, this step is specially:
Step S111 carries out prescan to testee respectively through at least two different angles, obtains the prescan information of testee.Seeing also Fig. 4, is that example describes with simple " U " shaped object, and x-ray source 11 carries out prescan from an angle to testee 17, and scanning light beam guarantees to cover whole testee 17.Then; X-ray source 11 and detector 13 are that the center is rotated with sweep center point (figure does not show); Carry out prescan after forwarding another scanning angle to, rotational angle is spent less than 180 more than or equal to 90 degree, so that can collect whole overall size information of this " U " shape testee 17.
Step S112 sets up the testee dimension model according to prescan information.The prescan information that the prescan that carries out according to two different angles obtains is set up the dimension model of testee, and model has comprised the dimensional parameters of testee each several part.Please refer again to Fig. 4,, can carry out more prescan,, need the above repeatedly prescan of selected two angles particularly for the irregular object of some poles of figure to object in order to make the testee dimension model more in detail accurately.
Step S200 regulates the X ray light beam according to the testee dimension model, and testee is scanned, and obtains the scanning information of testee.See also Fig. 5, before x-ray source 11, install diaphragm 19 additional, the structure of diaphragm 19 is as shown in Figure 6, can control the size of its opening and regulate x-ray source 11 output X ray light beams to reach.The openings of sizes of diaphragm 19 when coming to confirm in advance corresponding different scanning angle according to the dimension model of testee 17; To regulate the opening angle of X ray light beam; As figure in angle α and angle β, make the X ray light beam just in time cover testee 17, and can not produce more than radiation.For example; Certain concrete position of human body is being carried out to when picture, is only needing scan interested position, but more than the X ray light beam can insulting other position; Through adjusting to X ray; It is only shone interested position when scanning, avoid damaging other position of human body, reduce the infringement of x-ray imaging human body.
Step S300 rebuilds scanning information and to obtain reconstructed image.Through regulating the X ray light beam, and object is scanned, obtain scanning information, scanning information is rebuild obtained the corresponding two dimensional image of object.If obtain the 3-D view of testee, can to before the two dimensional image of gained carry out three-dimensional reconstruction, thereby obtain the 3-D view of testee, be convenient to the observer and testee observed from a plurality of angles.
In the above-mentioned x-ray imaging method, through setting up the testee dimension model, and, light beam is only covered to testee, avoided the output of unnecessary X ray, reduce unnecessary damages according to testee dimension model adjustment X ray light beam.
See also Fig. 7, step S200 specifically comprises:
Step S211 confirms the datum line of testee according to the testee dimension model.The line that datum line goes out for the testee internal virtual, the datum line shape is different because of testee, and on the plane that x-ray source 11 and detector 13 belong to, the each point on the line simulates according to the shape of testee on this plane and obtains.Datum line has reflected the testee shape of testee on the plane that x-ray source 11 and detector 13 belong to the form of line.As shown in Figure 8, datum line 12 is the datum line of " U " shape testee.
Step S212; The adjustment scanning angle; And the X-ray scanning central point is positioned on the datum line all the time, the X ray incident direction is vertical with the tangent line of datum line on sweep center point, regulates the X ray light beam according to the dimension model of testee simultaneously; Testee is carried out the scanning of multi-angle, obtain the scanning information of testee.
In when scanning, begin from an end of " U " shape testee, X-ray scanning central point 15 is positioned on a point of datum line 12, x-ray source 11 sends X ray.Diaphragm 19 is regulated X ray according to the dimension model of testee, and testee is scanned.After scanning is accomplished, adjust scanning angle, and testee is carried out the position adjustment, X-ray scanning central point 15 is positioned on the datum line 12 once more, x-ray source 11 is launched adjusted X ray, accomplishes the scanning of ordering at b; Continue scanning that c point, d point, e are ordered etc. afterwards.On each different angles, testee carried out the scanning of pulsed,, obtain a point, b point, c and the scanning information of testee of each angle such as order, finally obtain two dimensional image until satisfying the demand that the scan-data that collects satisfies imaging.
When multi-angle scans; Confirm the datum line of testee according to the testee dimension model; And take sweep center point is positioned at the first-class method of datum line; Make each scanning testee to detector apart from basically identical, finally rebuild the also basically identical of enlargement ratio of the two dimensional image of gained, the multiple image of collection obtains the panoramic picture of U-shaped object through Computer Processing.
It should be noted that X ray incident direction and the datum line tangent line on sweep center point is vertical substantially, testee to detector when guaranteeing at every turn to scan apart from basically identical.For " U " shape testee 17; Choosing the measured point, during the position of scanning angle and testee, calculate according to the dimension model of testee; Make X ray only penetrate testee 17 once, avoid X ray as shown in Figure 9 to penetrate the situation of testee 17 for twice.At this moment; The X ray incident direction is keeping vertical under the situation with datum line at the tangent line on the sweep center point as much as possible; As fully vertically then can cause X ray to want in some cases to pass testee 17 twice; Thereby cause the imaging of the testee in two places that X ray passes all to be superimposed upon on the final image, reduce the accuracy of panoramic picture.The intensity of passing the X ray that dental arch needs in addition for twice is higher, can increase and possibly injure.
In one embodiment, when testee is carried out the scanning of a plurality of angles, also can adopt the mode of testee being carried out multi-angle continuous sweep.During scanning; Make sweep center point 15 once move to the b point through adjustment and move to c point, d point, e point again ... the X ray incident direction is vertical substantially with datum line 12 all the time simultaneously from a point; The continual X ray that sends of x-ray source; Continuously testee is scanned, obtain the scanning information of the successive testee of multi-angle.With respect to testee being carried out multi-angle pulsed method for scanning, the two dimensional image that this method obtains is that seriality is better.
See also Figure 10, for the regional area on the testee is carried out three-D CT imaging, in another embodiment, step S200 comprises:
Step S221 confirms the size and the center of the regional area of testee according to the testee dimension model.Shown in figure 11, needing the zone of imaging is the regional area 20 of testee 17, through the testee dimension model that abovementioned steps is set up, confirms the size and the center 21 of regional area.
Step S222 is positioned at the X-ray scanning central point on the center of regional area of testee.
Step S223 is the center rotation with the sweep center point, and according to the size real-time regulated X ray light beam of regional area, regional area is rotated scanning, obtains the partial sweep information of testee.X-ray scanning center (figure is mark not) is positioned on the center 21; X-ray source 11 is that the center is rotated scanning with it then; Detector also rotates accordingly simultaneously; And according to the size real-time regulated X ray light beam of regional area, scanning is accomplished the back system and is passed through three-dimensional reconstruction and obtain the three dimensional CT structural images.The mode of scanning can scan for pulsed, also can carry out continuous sweep.
It is pointed out that for three-D CT imaging, if area-of-interest is whole testee; Then confirming the center of testee according to the testee dimension model, the X-ray scanning central point is positioned on this center, is the center rotation with the sweep center point; And according to the size real-time regulated X ray light beam of testee; Testee is rotated scanning, obtains the scanning information of testee, system obtained the three dimensional CT structural images through three-dimensional reconstruction after scanning was accomplished.
Radiation dose for X ray in further reducing to detect in one embodiment, sees also Figure 12, and above-mentioned steps S100 comprises:
Step S121 confirms the classification of testee, obtains the type of testee.For some normal scanning objects; Can its category be divided; When being human body like detected object; Can classify according to factors such as detected person's ethnic group, region, age, sex, builds, same type of people has similar skeleton, contour feature, and individual variation is smaller for certain body part.
Step S122 obtains the common-use size model of same type objects according to the type of testee.Through a large amount of scannings, can in system, set up the common-use size model of this type objects, the meansigma methods of this type objects sample of the selection of parameter of common-use size model to certain type objects.When testee is scanned, can obtain the common-use size model of this type objects according to the type of testee.
Step S123 obtains the testee dimension model according to the common-use size model of same type objects.Concrete, can be with the common-use size model of same type objects as the testee dimension model.
In the above-mentioned x-ray imaging method; Through testee is sorted out, and obtain the common-use size model of this type objects of storage in advance, and obtain the testee dimension model by the common-use size model; Replace the prescan step, further reduced the amount of radiation of X ray.
The above embodiment has only expressed several kinds of embodiments of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with accompanying claims.
Claims (9)
1. an x-ray imaging method is characterized in that, may further comprise the steps:
Gather testee information, set up the testee dimension model;
Regulate the X ray light beam according to said testee dimension model, said testee is scanned, obtain the scanning information of testee;
Said scanning information rebuild obtain reconstructed image.
2. x-ray imaging method according to claim 1 is characterized in that, said collection testee information, and the step of setting up the testee dimension model comprises:
Respectively said testee is carried out prescan through at least two different angles, obtain the prescan information of said testee;
Set up the testee dimension model according to said prescan information.
3. x-ray imaging method according to claim 2 is characterized in that, saidly respectively the step that said testee carries out prescan is specially through at least two different angles:
Respectively said testee is carried out prescan through two different angles, the angle between two different angles more than or equal to 90 degree less than 180 degree.
4. x-ray imaging method according to claim 1 is characterized in that, said collection testee information, and the step of setting up the testee dimension model comprises:
Confirm the classification of said testee, obtain the type of testee;
Obtain the common-use size model of same type objects according to the type of said testee;
Common-use size model according to said same type objects obtains the testee dimension model.
5. x-ray imaging method according to claim 1 is characterized in that, saidly regulates the X ray light beam according to said testee dimension model, and testee is scanned, and the step that obtains the scanning information of testee comprises:
Confirm the size and the center of the regional area of said testee according to said testee dimension model;
The X-ray scanning central point is positioned on the center of regional area of said testee;
With said sweep center point is center rotation, and according to the size real-time regulated X ray light beam of said regional area, said regional area is rotated scanning, obtains the partial sweep information of said testee.
6. x-ray imaging method according to claim 1 is characterized in that, saidly regulates the X ray light beam according to said testee dimension model, and said testee is scanned, and the step that obtains the scanning information of testee comprises:
Confirm the datum line of said testee according to said testee dimension model;
Adjust scanning angle, and the X-ray scanning central point is positioned on the datum line all the time, regulate the X ray light beam according to the dimension model of testee simultaneously, said testee is carried out the scanning of multi-angle, obtain the scanning information of testee.
7. x-ray imaging method according to claim 6 is characterized in that, the said mode that said testee is carried out the scanning of multi-angle, and the scanning information that obtains testee is specially:
Said testee is carried out the scanning of multi-angle pulsed, obtain the scanning information of the testee of each angle.
8. x-ray imaging method according to claim 6 is characterized in that, the said mode that said testee is carried out the scanning of multi-angle is specially:
Said testee is carried out multi-angle continuous sweep, obtain the scanning information of the successive testee of multi-angle.
9. x-ray imaging method according to claim 1 is characterized in that, saidly said scanning information is rebuild the step that obtains reconstructed image is specially:
Said scanning information is rebuild the two dimensional image that obtains testee, said two dimensional image is carried out the 3-D view that three-dimensional reconstruction obtains testee.
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| CN103852797A (en) * | 2014-02-08 | 2014-06-11 | 东莞市二郎神影像设备有限公司 | Detector |
| WO2014198237A1 (en) * | 2013-06-14 | 2014-12-18 | 同方威视技术股份有限公司 | Ct imaging method and system |
| CN105559809A (en) * | 2014-11-09 | 2016-05-11 | 刁心玺 | Scanning method and device |
| CN107307877A (en) * | 2012-09-13 | 2017-11-03 | 东芝医疗系统株式会社 | Radiographic apparatus |
| CN108181662A (en) * | 2017-12-20 | 2018-06-19 | 东北大学 | A kind of intelligent control Security Inspection Equipments |
| CN108310684A (en) * | 2018-04-11 | 2018-07-24 | 西安大医数码科技有限公司 | A kind of image guided radiation therapy equipment |
| CN109814164A (en) * | 2019-03-13 | 2019-05-28 | 北京华力兴科技发展有限责任公司 | Vehicle inspection equipment |
| CN112581460A (en) * | 2020-12-24 | 2021-03-30 | 上海联影医疗科技股份有限公司 | Scanning planning method, device, computer equipment and storage medium |
| CN113740358A (en) * | 2021-09-28 | 2021-12-03 | 原科辐能(烟台)智能科技有限公司 | X-ray inspection system for vehicle |
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| CN107307877B (en) * | 2012-09-13 | 2021-06-01 | 东芝医疗系统株式会社 | X-ray diagnostic apparatus |
| WO2014198237A1 (en) * | 2013-06-14 | 2014-12-18 | 同方威视技术股份有限公司 | Ct imaging method and system |
| CN103852797A (en) * | 2014-02-08 | 2014-06-11 | 东莞市二郎神影像设备有限公司 | Detector |
| CN105559809A (en) * | 2014-11-09 | 2016-05-11 | 刁心玺 | Scanning method and device |
| CN108181662A (en) * | 2017-12-20 | 2018-06-19 | 东北大学 | A kind of intelligent control Security Inspection Equipments |
| CN108310684A (en) * | 2018-04-11 | 2018-07-24 | 西安大医数码科技有限公司 | A kind of image guided radiation therapy equipment |
| CN109814164A (en) * | 2019-03-13 | 2019-05-28 | 北京华力兴科技发展有限责任公司 | Vehicle inspection equipment |
| CN112581460A (en) * | 2020-12-24 | 2021-03-30 | 上海联影医疗科技股份有限公司 | Scanning planning method, device, computer equipment and storage medium |
| CN112581460B (en) * | 2020-12-24 | 2023-08-18 | 上海联影医疗科技股份有限公司 | Scanning planning method, device, computer equipment and storage medium |
| CN113740358A (en) * | 2021-09-28 | 2021-12-03 | 原科辐能(烟台)智能科技有限公司 | X-ray inspection system for vehicle |
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Application publication date: 20120808 |