CN212111830U

CN212111830U - Three-dimensional tomography imaging equipment

Info

Publication number: CN212111830U
Application number: CN202020345006.3U
Authority: CN
Inventors: 奚道明
Original assignee: Suzhou Ruimaisi Medical Technology Co ltd
Current assignee: Suzhou Ruimeisi Technology Co.,Ltd.
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-12-08
Anticipated expiration: 2030-03-18

Abstract

The utility model discloses a three-dimensional fault imaging device, including the ray generator, object conveyer and detector array, the ray generator sends the ray to object conveyer direction, the detector array receives the ray, the detector array is located object conveyer's both sides respectively with the ray generator, the detector array is including being no less than four linear array detectors, linear array detector is along the direction of transfer interval arrangement of object in the irradiation range of ray generator, spacing distance between two adjacent linear array detectors is not less than linear array detector self width, each linear array detector includes four at least detection pixels. The utility model discloses a three-dimensional tomography imaging device can acquire the tomogram of object, simple structure, low cost simultaneously.

Description

Three-dimensional tomography imaging equipment

Technical Field

The utility model relates to a ray imaging field, more specifically relate to a three-dimensional tomography equipment.

Background

In the field of high-energy ray imaging, high-energy rays such as X-rays, gamma-rays and neutron rays are generally adopted to detect and image a measured object, and corresponding imaging devices include CT, security inspection devices, PET and the like, and through the imaging devices, internal structure or biochemical information of the measured object can be acquired. For example, in a security inspection apparatus or a security inspection CT, in order to clearly see the structure or other information contained in the interior of the object, the security inspection apparatus in the prior art generally irradiates the object with X-rays, then receives the X-rays passing through the object with a detector, and reconstructs an image according to the attenuation data of the X-rays and other information, thereby restoring the structure or other information in the interior of the object.

When a security inspection device acquires a perspective image, a line-by-line scanning mode is adopted initially, for example, the security inspection device shown in fig. 1 mainly comprises an X-ray bulb tube 1, a linear array detector 2 and an object conveying device 3, wherein X-rays 4 emitted by the X-ray bulb tube 1 are collimated and then irradiated onto the linear array detector 2 which is arranged oppositely, and the X-ray bulb tube 1 and the linear array detector 2 can be regarded as being in the same detection plane; the object conveying device 3 is arranged between the X-ray bulb tube 1 and the linear array detector 2 and can drive the object 5 to move at a constant speed along the direction X vertical to the detection plane; the linear array detector 2 acquires the X-ray 4 or the intensity information of the X-ray 4 after passing through the object 5 at equal time intervals and finally reconstructs the X-ray to form an image. This method can obtain a perspective image of the inside of the object, which is substantially a two-dimensional plane image when the object passes through the X-ray detection plane, as shown in the black part projection view in the object 5 in fig. 1, perspective images of different positions of the object are obtained at different times as the object is conveyed, but these perspective images are actually accumulated images of the elements inside the object in the X-ray direction, and the three-dimensional structure of the elements inside the object cannot be accurately reflected, and since there may be overlapping of the elements inside the object, it is difficult to distinguish fine objects from the perspective images.

In order to solve the problem of difficulty in distinguishing fine objects caused by image overlapping, the most common method is to place multiple groups of corresponding linear array detectors and X-ray bulbs in the same security inspection equipment, and obtain perspective images of the inside of an object from different angles. In consideration of cost, two sets of corresponding linear array detectors and X-ray bulbs are generally adopted to respectively acquire images from two viewing angles and identify dangerous objects. However, this method still cannot realize three-dimensional imaging of the object, and the obtained images still have the situation of object superposition.

To achieve the acquisition of three-dimensional images, the spiral CT imaging technique is applied to a security inspection apparatus, as shown in fig. 2. Compared with the traditional security inspection equipment, the security inspection equipment adopting the technology has the advantages that the X-ray bulb tubes 1' and the linear array detectors 2' are arranged in pairs and rotate around the object conveying device 3' at the same time, when an object 5' (shown by a plurality of imaging section diagrams) moves along with the conveying device 3', projection data of a plurality of angles can be acquired, and then the three-dimensional sectional images are acquired through an image reconstruction technology. In order to realize high-speed and continuous imaging, as shown in fig. 2, an object 5 'is placed on a conveyer 3' and moves forward at a constant speed along an axial direction X ', a linear array detector 2' and an X-ray bulb tube 1 'rotate synchronously and continuously, and image data signals and power signals related to the linear array detector and the X-ray bulb tube are transmitted through a matched slip ring device 6'. In order to maintain the integrity of the projection data, a plurality of sets of linear array detectors 2 'need to be arranged closely along the axial direction, and the speed of the object 5' needs to be less than the ratio of the axial width of the plurality of sets of linear array detectors 2 'to the time taken for the detector 2' to rotate for one circle. Although the spiral CT imaging technology can achieve the acquisition of three-dimensional tomographic images, due to the use of the slip ring device, the imaging speed is slow and the structure is complex, and meanwhile, the slip ring has the problems that data transmission is unstable, the slip ring is easy to damage and the like in the use process.

To avoid the use of slip rings, the industry has begun to develop static CT imaging techniques. The detector is arranged in a ring configuration around the direction of travel of the object, with bulbs placed at multiple locations in the detector ring. The object is still moving at a uniform speed in the axial direction. In static CT, X-ray bulbs are required to generate rays one by one in sequence, but the X-ray bulbs in the prior art cannot be frequently disconnected, so that a special X-ray bulb device needs to be developed. Although static CT avoids the use of a slip ring device, improves the imaging speed and reduces the complexity of system results, on one hand, the development of special X-ray ball tubes inevitably promotes the research and development cost, on the other hand, when detecting large objects, the detectors arranged in an annular mode greatly improve the number of the detectors, and both the detectors can lead to too high equipment cost.

In summary, the security inspection apparatus in the prior art acquires a planar perspective image of the inside of an object, and cannot provide a three-dimensional tomographic image of the inside of a bag. Although the spiral CT technology is adopted to realize the acquisition of three-dimensional tomographic images, the continuous rotation of the detector and the bulb tube needs to use a slip ring, and the system structure and the imaging speed are both limited. Although the static CT technology can also be used for acquiring the three-dimensional tomographic image, the traditional X-ray bulb tube does not support frequent and rapid disconnection, a novel X-ray bulb tube needs to be developed for support, and the cost of equipment is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a three-dimensional tomography imaging device to solve among the prior art imaging device and can not compromise the problem of formation of image quality and cost when acquireing three-dimensional tomograph.

The utility model provides a three-dimensional tomography equipment, this three-dimensional tomography equipment include ray generator, detector array and object conveyer, the ray generator to the object conveyer direction sends high energy ray, the detector array receives high energy ray, the detector array with the ray generator is located respectively object conveyer's both sides, the detector array is including being no less than four linear array detectors, the linear array detector is in along the direction of transfer interval arrangement of object, adjacent two in the irradiation range of ray generator interval distance between the linear array detector is not less than linear array detector self width, each the linear array detector includes four at least detection pixels.

According to the utility model discloses an embodiment, the spacing distance between two adjacent linear array detectors in the detector array is the same.

According to the utility model discloses an embodiment, the spacing distance between having a plurality of linear array detector in the detector array is different.

According to the utility model discloses an embodiment, among the linear array detector the detection pixel along the extending direction of linear array detector closely arranges.

According to an embodiment of the present invention, the extending direction of the linear array detector is perpendicular to the conveying direction of the object.

According to the utility model discloses an embodiment, linear array detector's extending direction with the direction of delivery of object is out of plumb.

According to the utility model discloses an embodiment, linear array detector is located same first plane.

According to an embodiment of the invention, the plane on which the conveyor belt of the object conveyor is located and the first plane are parallel to each other.

According to an embodiment of the invention, the plane on which the conveyor belt of the object conveyor is located is perpendicular to the first plane.

According to the utility model discloses an embodiment, the detector array includes two sets at least, wherein at least one set of in the detector array linear array detector's extending direction is different with other groups linear array detector's extending direction.

According to an embodiment of the present invention, the radiation generator includes at least two, and the detector array receives the high-energy radiation emitted by each radiation generator.

According to the utility model discloses an embodiment, the detector array includes at least two sets, wherein every set of the detector array corresponds and receives one of them high energy ray that the ray generator sent.

According to the utility model discloses an embodiment, three-dimensional tomography equipment still includes data processing equipment, data processing equipment with detector array communication connection is in order to handle the detection data that detector array acquireed.

According to the utility model discloses an embodiment, three-dimensional tomography equipment still includes display device, display device with data processing equipment communication connection is in order to show the formation of image result.

The utility model also provides a three-dimensional tomography equipment, this three-dimensional tomography equipment includes ray generator, detector array and object conveyer, the ray generator sends high energy ray to the object conveyer direction, the ray generator includes two at least, the detector array includes two sets at least, each set the detector with one of them the ray generator corresponds, object conveyer is located between the ray generator and the detector array; at least one of the ray generators and the other ray generators are respectively positioned at two sides of the object conveying device; each detector array comprises at least four linear array detectors, the linear array detectors are arranged at intervals along the transmission direction of an object within the irradiation range of the ray generator, the interval distance between every two adjacent linear array detectors is not smaller than the width of the linear array detectors, and each linear array detector comprises at least four detection pixels.

According to the utility model discloses an in one of them embodiment, each two adjacent in the detector array the interval distance between the linear array detector is the same.

According to the utility model discloses a wherein, wherein at least one the detector array has the interval distance between a plurality of linear array detector different.

According to the utility model discloses an one of them embodiment, among the linear array detector the detection pixel along the extending direction of linear array detector closely arranges.

According to one of the embodiments of the present invention, the extending direction of the linear array detector is perpendicular to the conveying direction of the object.

According to one of the embodiments of the present invention, the extending direction of the linear array detector is not perpendicular to the conveying direction of the object.

According to the utility model discloses a one of them embodiment, linear array detector is located same first plane.

According to one of the embodiments of the present invention, the plane on which the conveyor belt of the object conveyor is located and the first plane are parallel to each other.

According to one embodiment of the present invention, the plane on which the conveyor belt of the object conveyor is located is perpendicular to the first plane.

According to the utility model discloses a wherein one of them embodiment, wherein at least one set of in the detector array the extending direction of linear array detector is different with other groups the extending direction of linear array detector.

The utility model provides a three-dimensional fault imaging device, through the arrangement mode of design detector and bulb, a small amount of linear array detectors are discretely arranged in the conveying direction of the object, can obtain the fault image of the object under a plurality of angles, and then can clearly feed back the three-dimensional structure information in the luggage through image reconstruction; and simultaneously, the utility model discloses well need not detector and bulb to rotate around the object, avoided the use of sliding ring device, also need not the X ray bulb frequently to cut off, simple structure, low cost has important meaning to imaging device's upgrading innovation.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of an X-ray security inspection apparatus according to the prior art;

FIG. 2 is a schematic diagram of another X-ray security device according to the prior art;

fig. 3 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a positional arrangement between a portion of a detector array and a ray generator of the three-dimensional tomographic imaging apparatus according to the embodiment of FIG. 3, in which detection pixels of the detector array are shown;

FIG. 5 is a schematic side view of the three-dimensional tomographic imaging apparatus according to the embodiment of FIG. 3, wherein the Z direction is perpendicular to the paper;

FIG. 6 is an AA cross-sectional schematic view of the three-dimensional tomographic imaging apparatus according to the embodiment of FIG. 3;

fig. 7 is a sinogram acquired by a three-dimensional tomographic imaging apparatus according to an embodiment of the present invention, wherein the abscissa represents time and the ordinate represents angle;

FIG. 8 is a corrected sinogram for the three-dimensional tomography device according to the embodiment of FIG. 7, where the abscissa represents position and the ordinate represents angle;

fig. 9 is a comparative schematic view of imaging results of a three-dimensional tomographic imaging apparatus according to an embodiment of the present invention;

fig. 10 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to another embodiment of the present invention;

fig. 11 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to still another embodiment of the present invention;

fig. 12 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to another embodiment of the present invention;

fig. 13 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to still another embodiment of the present invention;

fig. 14 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to still another embodiment of the present invention;

FIG. 15 is a schematic side view of the three-dimensional tomographic imaging apparatus according to the embodiment of FIG. 14, wherein the Z direction is perpendicular to the paper;

fig. 16 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to still another embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the following specific embodiments. It should be understood that the following examples are illustrative of the present invention only and are not intended to limit the scope of the present invention.

It will be understood that when an element/feature is referred to as being "disposed on" another element/feature, it can be directly on the other element/feature or intervening elements/features may also be present. When a component/part is referred to as being "connected/coupled" to another component/part, it can be directly connected/coupled to the other component/part or intervening components/parts may also be present. The term "connected/coupled" as used herein may include electrical and/or mechanical physical connections/couplings. The term "comprises/comprising" as used herein refers to the presence of features, steps or components/features, but does not preclude the presence or addition of one or more other features, steps or components/features. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

In addition, in the description of the present invention, the terms "first", "second", and the like are used for descriptive purposes only and to distinguish similar objects, and there is no order of precedence between them, nor should they be construed as indicating or implying relative importance. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

Fig. 3 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to an embodiment of the present invention, as shown in fig. 3, the present invention provides a three-dimensional tomographic imaging apparatus including a radiation generator 10, a detector array 20 and an object conveying device 30, wherein the radiation generator 10 is disposed opposite to the detector array 20, the detector array 20 includes a plurality of

line detectors

21, 22, … …, 2n (where n is a natural number), the

line detectors

21, 22, … …, 2n are spaced apart from each other in an irradiation range of the radiation generator along a conveying direction Z of an object, for example, the line detectors 2n are spaced apart from each other and arranged parallel to each other, the detector array 20 forms a first plane as a whole, the object conveying device 30 is disposed between the radiation generator 10 and the detector array 20, a plane where a conveyor belt of the object conveying device 30 is located is parallel to the first plane, the object to be measured is placed on a conveyor belt and conveyed in the direction Z indicated by the arrow in fig. 1. It should be understood by those skilled in the art that the above-mentioned "spaced arrangement along the conveying direction of the object" includes not only the case that the arrangement direction of the line detectors is parallel to the direction Z, but also the case that the direction Z has an included angle with the arrangement direction of the line detectors, that is, the spaced arrangement along the conveying direction of the object according to the present invention should be understood as substantially spaced arrangement along the conveying direction of the object, the line detectors may not be in the same first plane, and the extending direction of the line detectors themselves does not necessarily keep completely perpendicular to the direction Z.

The radiation generator 10 may emit high-energy radiation 40 to the detector array 20, the high-energy radiation 40 may include X-rays, gamma rays, neutron rays, proton rays, beta rays, etc., it should be noted by those skilled in the art that when different types of high-energy radiation are used, the detector type in the detector array 20 needs to be replaced, for example, the radiation generator 10 may use an X-ray tube in the prior art, and the detector array 20 correspondingly uses an X-ray detector; when the gamma ray generator 10 is used, the detector array 20 correspondingly uses gamma ray detectors, which are not described in detail herein.

The ray emitted by the ray generator 10 can be cone-shaped or parallel beam-shaped, when the ray is cone-shaped, the ray 40 forms a cone-shaped ray beam which takes the ray generator 10 as a vertex and faces to the first plane, the ray beam 40 has an opening angle, the degree of the opening angle is the cone angle degree of the cone, and at this time, the detector array 20 is preferably uniformly distributed in the irradiation range of the cone-shaped ray beam; when the rays 40 are in the form of parallel beams, the rays form mutually parallel beams between the ray generator 10 and the detector array 20.

The detector array 20 is used for receiving the radiation 40 emitted by the radiation generator 10, and the detector array 20 should be within the coverage of the radiation 40 and should be able to cover the largest cross section of the object 50 to be measured. In the embodiment shown in fig. 3, the detector array 20 employs the same line detectors as those in the prior art, the extending directions of the line detectors can be regarded as being in the same straight line, the difference is that the

line detectors

21, 22, … …, 2n in the present invention are arranged in parallel and have a spacing distance therebetween, the line detectors 20 form a first plane, the extending direction of the line detector 20 is preferably perpendicular to the conveying direction Z of the object, the spacing distance between the line detectors 20 is preferably kept consistent, so that data acquisition and later image processing are more convenient and faster, and the detection time can be greatly shortened.

More specifically, as shown in fig. 4, each linear array detector includes a plurality of detection pixels, for example, the linear array detector 21 includes a plurality of detection pixels 216, the detection pixels 216 may be closely arranged or dispersedly arranged, the ray 40 emitted by the ray tube 10 may pass through the object 50 and then enter the corresponding detection pixel, and the detection pixel may detect ray attenuation information after passing through the object 50. Each linear array detector preferably adopts the same specification, and each linear array detector at least comprises four detection pixels.

Further, as shown in fig. 4 and 5, the detection pixels 216 with the same serial number or the same position in different linear array detectors are preferably located on the same straight line in the object conveying direction (i.e., Z direction), and the straight line and the radiosphere 10 form a detection plane, for example, the first detection pixel in all the linear array detectors may be located on the same straight line, and the straight line and the radiosphere 10 form a first detection plane 61; the second detection pixels in all the linear array detectors can be located on the same straight line, and the straight line and the ray tube 10 form a second detection plane 62; and so on, and will not be described in detail herein. It should be noted by those skilled in the art that only five detection planes are shown in fig. 5 for illustration, however, in actual use, the detection planes may be set as desired. Through arrangement mode inside perspective image of obtaining object obtain the planar image who obtains in the detection plane of difference in essence, because the detection pixel of each same sequence number is arranged along the direction that the object gos forward, can obtain the data that different angles detected the pixel and acquireed simultaneously, rebuild the three-dimensional structure that can accurately reflect each inside key element of object through the image in a plurality of detection plane, tiny object also can be distinguished easily. Additionally, according to the utility model discloses a conceive, the detection pixel of same serial number can also set up to not be located same straight line among the different linear array detectors, for example, second detection pixel 216 among the linear array detector 21, second detection pixel 226 among the linear array detector 22 and the second detection pixel among the linear array detector 2n can not be located same straight line, and at this moment, technical personnel in the art only need carry out data correction through linear difference, spline interpolation etc. and can realize surveying the correspondence of in-plane data, no longer describe herein.

Fig. 6 is an AA cross-sectional schematic view of the three-dimensional tomographic imaging apparatus according to the embodiment of fig. 3, where d represents a width of a detection pixel, S represents a distance between two adjacent linear array detectors, ln represents a distance between an nth linear array detector and an initial position of an object, a width d of the detection pixel is a width of the linear array detector, and an interval distance S between two adjacent linear array detectors 2n and 2(n +1) is not less than the width d of the detection pixel. It can be known through combining fig. 3-6, the utility model provides a three-dimensional tomography equipment is at the during operation, and every detection pixel in detector array 20 all can receive the ray that ray generator 10 sent, and at this moment, each detects and forms a first contained angle theta between line between pixel and the ray generator 10 and the direction of advance Z of object 50, because the position of each detection pixel is different, and the value of first contained angle theta is also different. Although the values of the first included angles θ are different, the specific value of each first included angle θ can be rapidly obtained according to the position of the detection pixel and the ray generator 10. The object 50 is placed on the conveyor belt of the object conveying device 30 and moves at a constant speed V along the direction Z, when the object 50 passes through the irradiation region of the ray 40, the ray 40 passes through the object 50 and is attenuated to different degrees, and the detection pixel can detect information of the attenuated ray, such as the intensity value of the attenuated ray and the like. After the object 50 sequentially passes through the nth to the first linear array detectors, the detection pixel acquires ray information at different first included angle values and different positions.

After the detection pixel acquires the ray information of different first included angles and different positions, a sinogram corresponding to the object can be acquired according to the included angle values, the position values and the ray information, as shown in fig. 7, the sinogram is actually the ray information acquired by different detection pixels in different detection planes, wherein the abscissa represents time t, and the ordinate represents the angle value of the first included angle θ, and the acquisition step of the sinogram is as follows: step 1, determining a detection plane formed by an mth detection pixel in an nth detector; step 2, obtaining intensity information when rays reach an mth detection pixel in an nth detector at different moments by an interpolation method, wherein the interpolation method comprises a linear difference value, spline interpolation and the like; and 3, ray intensity information obtained by each detection pixel at different moments t is shown as a transverse white line in fig. 7, wherein the first included angle value can be calculated according to the step form of the detector. It is noted that the larger the number of detection pixels, the more complete the data of the sinogram obtained.

After the sinogram shown in fig. 7 is acquired, further correction is required, as shown in fig. 8, where the abscissa indicates the position s and the ordinate indicates the angle value of the first angle θ, and s is Vt- (l)_n+ d/2), the sinogram representing the ray attenuation information corresponding to the position s and the first included angle θ, for example, the ray attenuation information measured by the m-th detection pixel in the first to n-th linear array detectors 21 to 2n is sequentially represented by parallel beam projection and a horizontal white line in fig. 8. Through the sinogram of fig. 8, can further accomplish three-dimensional tomographic image's acquirement through algorithms such as FBP, ART, wherein, adopt corresponding data processing equipment to carry out corresponding data processing and the display device that corresponds to carry out the formation of image and show and be that technical personnel in the ART understand easily and realize according to the utility model discloses a, no longer describe here.

Fig. 9 is a result of comparing imaging results obtained by using different numbers of linear array detectors with original slice images of an object, wherein the linear array detectors are arranged at equal intervals and at equal angles, and it can be known from fig. 9 that the greater the number of linear array detectors, the closer the obtained imaging result is to the real slice imaging result inside the object, and when 60 linear array detectors are used, the clearer image of the imaging is closer to the original slice images; when more than 12 linear array detectors are adopted, the elements in the object can be distinguished sufficiently. In order to guarantee the quality of formation of image result, the utility model discloses in need set up four linear array detectors at least. It should be noted that the security inspection CT in the prior art is limited by the structure, and the obtained tomographic image and the extending direction of the line array detector are parallel to each other, as shown in fig. 1 or fig. 5, so that the final imaging result is the superposition of the elements in the object along the ray direction, and it is difficult to distinguish the overlapped objects; and through the utility model discloses the tomograph that unique structure obtained is parallel with the direction of advance of object, and is perpendicular with linear array detector's extending direction, as shown in fig. 5, wherein object 50 shows through a plurality of tomographs, after obtaining all tomographs of object, can obtain the three-dimensional information of object through image stack and reorganization, owing to survey the pixel and obtained the decay information under the multi-angle to can acquire the relative position between each inside element of object, realize the resolution of each inside element of object, no matter pile up between these elements.

Fig. 10 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to another embodiment of the present invention, the embodiment of fig. 10 is compared with the embodiment of fig. 3, the same or similar components are denoted by reference numerals increased by "100", only the differences compared with the embodiment of fig. 3 are described herein, and other parts can be easily implemented by those skilled in the art according to the concept of the present invention, and will not be described herein again. In the embodiment of fig. 10, two sets of matched ray generators and detector arrays are adopted in the same three-dimensional tomographic imaging apparatus, specifically, the ray generator 110 corresponds to the detector arrays 121-12n, the detector arrays 121-12n receive the high-energy rays from the ray generator 110, the ray generator 160 corresponds to the detector arrays 171-17n, the detector arrays 171-17n receive the high-energy rays from the ray generator 160, the two

ray generators

110, 160 are located on the same side of the conveyor belt of the object conveyor 130, the detector arrays are located on the other side of the conveyor belt, and the two detector arrays are disposed adjacently, so that the three-dimensional tomographic imaging apparatus can rapidly implement imaging inspection of a long-strip object.

Fig. 11 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to another embodiment of the present invention, the embodiment of fig. 11 is compared with the embodiment of fig. 10, the same or similar components are denoted by reference numerals increased by "100", only the differences compared with the embodiment of fig. 10 are described herein, and other parts can be easily implemented by those skilled in the art according to the concept of the present invention, and will not be described herein again. In the embodiment of fig. 11, two sets of ray generators and detector arrays are also used in the same three-dimensional tomographic imaging apparatus, but the two sets of ray generators and detector arrays are different in relative position, specifically, the ray generator 210 corresponds to the detector arrays 221 to 22n, the detector arrays 221 to 22n receive the high-energy rays from the ray generator 210, the ray generator 260 corresponds to the detector arrays 271 to 27n, the detector arrays 271 to 27n receive the high-energy rays from the ray generator 260, the two

ray generators

210 and 260 are respectively located at two sides of the conveyor belt of the object conveyor 230, and the two sets of

detector arrays

22n and 27n are also respectively located at two sides of the conveyor belt.

Fig. 12 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to another embodiment of the present invention, the embodiment of fig. 12 is compared with the embodiment of fig. 3, the same or similar components are denoted by reference numerals increased by "300", only the differences compared with the embodiment of fig. 3 are described herein, and other parts can be easily implemented by those skilled in the art according to the concept of the present invention, and will not be described herein again. In the embodiment of fig. 12, each of the

line detectors

321, 322, … …, and 32n in the detector array 320 is parallel to each other, but the extending direction of the line detectors is not perpendicular to the conveying direction Z of the object conveying device 330, that is, the second included angle α between the line detectors and the conveying direction Z is not equal to 90 degrees, at this time, the connecting line between the detection pixels with the same sequence number in

different line detectors

321, 322, the same.

Fig. 13 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to another embodiment of the present invention, the embodiment of fig. 13 is compared with the embodiment of fig. 11, the same or similar components are denoted by reference numerals increased by "200", only the differences compared with the embodiment of fig. 11 are described herein, and other parts can be easily implemented by those skilled in the art according to the concept of the present invention, and will not be described herein again. In the embodiment of fig. 13, two sets of ray generators and detector arrays are used in the same three-dimensional tomographic imaging apparatus, the ray generator 410 corresponds to the detector arrays 421-42n, and the detector arrays 421-42n receive the high-energy rays from the ray generator 410; the ray generator 460 corresponds to the detector arrays 471-47n, the detector arrays 471-47n receive the high-energy rays from the ray generator 460, the two

ray generators

410, 460 are respectively located at two sides of the conveyor belt of the object conveyor 430, the two groups of detector arrays 42n, 47n are also respectively located at two sides of the conveyor belt, meanwhile, the extending direction of the linear array detector is not perpendicular to the conveying direction Z, i.e. the second included angle α between the two is not equal to 90 degrees, at this time, the connecting lines between the detection pixels with the same sequence number in different linear array detectors are not parallel to the conveying direction of the object, at this time, the data obtained by each detection pixel and the coordinate system will be changed relatively, and those skilled in the art need to perform data correction by methods such as coordinate system conversion, and the description is omitted here. It is also to be understood that the

ray generators

410, 460 may be located on the same side of the conveyor belt as shown in fig. 10, and the extending direction of the first set of line detectors 421-42n and the extending direction of the second set of line detectors 471-47n may not be parallel to each other, i.e. the second included angle α and the third included angle β may be different, and the third included angle β is the included angle between the extending direction of the second set of line detectors 471-47n and the object conveying direction Z.

Fig. 14 and 15 are sinograms of a three-dimensional tomographic imaging apparatus according to an embodiment of the present invention, and the embodiment of fig. 14 and 15 is compared with the embodiment of fig. 3, and the same or similar components are denoted by reference numerals increased by "500", and only the differences compared with the embodiment of fig. 3 will be described herein, and other parts of the art can be easily implemented according to the concept of the present invention, and will not be described herein again. In the embodiment of fig. 14, each of the line detectors 521-52n in the detector array 520 is parallel to each other, and the extending direction of the line detectors is perpendicular to the conveying direction Z of the object conveying device 530, however, the plane where the conveyor belt of the conveying device 530 is located is not parallel to the first plane as shown in fig. 3, but is perpendicular to the first plane (fig. 15), at this time, the data obtained by each detection pixel is not changed in nature, but the embodiment is more suitable for detection in some special application occasions, and those skilled in the art need to perform data correction by methods such as coordinate system transformation, and details are not described herein.

Fig. 16 is a schematic perspective view of a three-dimensional tomographic imaging apparatus according to another embodiment of the present invention, the embodiment of fig. 16 is compared with the embodiment of fig. 10, the same or similar components are denoted by reference numerals increased by "500", only the differences compared with the embodiment of fig. 10 are described herein, and other parts can be easily implemented by those skilled in the art according to the concept of the present invention, and will not be described herein again. In the embodiment of fig. 16, two sets of

ray generators

610, 660 are used in the same three-dimensional tomographic imaging apparatus, and the two sets of

ray generators

610, 660 are both corresponding to the same set of detector arrays 621-62n, the two sets of

ray generators

610, 660 are located on the same side of the conveyor 630 and are spaced apart, the detector arrays 621-62n can receive the high-energy rays from the

ray generators

610, 660, and at this time, a three-dimensional tomographic image can be reconstructed from the obtained sinogram.

The utility model discloses a redesign the form of arranging between ray generator, detector array and the object conveyer, compare with spiral CT imaging technique, can realize the fault formation of image of the object that awaits measuring under the rotatory condition of detector and ray generator, have simple structure, the fast characteristics of imaging speed. Compared with the static CT, the utility model discloses can realize the acquirement of fault data through the bulb among the prior art, no longer need research and development design special X ray bulb again, realize reduce cost's purpose under the prerequisite of guaranteeing imaging quality.

What has been described above is only the preferred embodiment of the present invention, not for limiting the scope of the present invention, but the above embodiments of the present invention can also make various changes, for example, can combine the schemes in different embodiments of the present invention. All the simple and equivalent changes and modifications made according to the claims and the content of the specification of the present invention fall within the scope of the claims of the present invention. What is not described in detail in the present invention is the conventional technical content, such as supplying power to the ray generator, the detector array and the object conveying device, and setting different shells according to different application scenarios, etc., which are not described in detail herein.

Claims

1. A three-dimensional tomographic imaging apparatus comprising a radiation generator, a detector array, and an object conveyor, said radiation generator emitting radiation in a direction of said object conveyor, said detector array receiving said radiation,

the detector array and the ray generator are respectively positioned on two sides of the object conveying device, the detector array comprises at least four linear array detectors, the linear array detectors are arranged at intervals in the irradiation range of the ray generator along the conveying direction of the object, the interval distance between every two adjacent linear array detectors is not smaller than the width of each linear array detector, and each linear array detector comprises at least four detection pixels.

2. The three-dimensional tomographic imaging apparatus of claim 1, wherein a spacing distance between two adjacent line detectors in the detector array is the same.

3. The three-dimensional tomographic imaging apparatus of claim 1, wherein a plurality of line detectors in the detector array are spaced at different distances.

4. The three-dimensional tomographic imaging apparatus according to claim 1, wherein the detection pixels in the line detector are closely arranged along an extending direction of the line detector.

5. The three-dimensional tomographic imaging apparatus as set forth in claim 1, wherein an extending direction of the line detector is perpendicular to a conveying direction of the object.

6. The three-dimensional tomographic imaging apparatus as set forth in claim 1, wherein an extending direction of the line detector is not perpendicular to a conveying direction of the object.

7. The three-dimensional tomographic imaging apparatus of claim 1, wherein the line detectors are located in a same first plane.

8. The three-dimensional tomographic imaging apparatus according to claim 7, wherein a plane in which a conveyor belt of the object conveyor is located and the first plane are parallel to each other.

9. The three-dimensional tomographic imaging apparatus according to claim 7, wherein a plane in which a conveyor belt of the object conveyor is located is perpendicular to the first plane.

10. The three-dimensional tomographic imaging apparatus as set forth in claim 1, wherein the detector arrays include at least two groups, wherein the extending direction of the line detectors in at least one group of the detector arrays is different from the extending direction of the line detectors in the other groups.

11. The three-dimensional tomographic imaging apparatus of claim 1, wherein the ray generators include at least two, and the detector array receives the high-energy rays emitted from each of the ray generators.

12. The three-dimensional tomographic imaging apparatus of claim 11, wherein the detector arrays include at least two sets, each of the sets of the detector arrays receiving the high-energy radiation emitted from one of the radiation generators.

13. The three-dimensional tomographic imaging apparatus of claim 1, further comprising a data processing apparatus communicatively coupled to the detector array to process detection data acquired by the detector array.

14. The three-dimensional tomographic imaging apparatus of claim 13, further comprising a display device communicatively connected with the data processing device to display imaging results.

15. A three-dimensional tomographic imaging apparatus comprising a radiation generator, a detector array, and an object conveying device, the radiation generator emitting radiation toward the object conveying device,

the ray generator comprises at least two ray generators, the detector array comprises at least two groups, each group of detectors corresponds to one of the ray generators, and the object conveying device is positioned between the ray generator and the detector array; at least one of the ray generators and the other ray generators are respectively positioned at two sides of the object conveying device; each detector array comprises at least four linear array detectors, the linear array detectors are arranged at intervals along the transmission direction of an object within the irradiation range of the ray generator, the interval distance between every two adjacent linear array detectors is not smaller than the width of the linear array detectors, and each linear array detector comprises at least four detection pixels.

16. The three-dimensional tomographic imaging apparatus as claimed in claim 15, wherein a spacing distance between adjacent two of said line detectors in each of said detector arrays is the same.

17. The three-dimensional tomographic imaging apparatus of claim 15, wherein a plurality of line detectors in at least one of said detector arrays are spaced at different distances.

18. The three-dimensional tomographic imaging apparatus as claimed in claim 15, wherein the detection pixels in the line detector are closely arranged along an extending direction of the line detector.

19. The three-dimensional tomographic imaging apparatus as recited in claim 15, wherein an extending direction of the line detector is perpendicular to a conveying direction of the object.

20. The three-dimensional tomographic imaging apparatus as claimed in claim 15, wherein an extending direction of the line detector is not perpendicular to a conveying direction of the object.

21. The three-dimensional tomographic imaging apparatus of claim 15, wherein the line detectors are located in a same first plane.

22. The three-dimensional tomographic imaging apparatus according to claim 21, wherein a plane in which the conveyor belts of the object conveyor are located and the first plane are parallel to each other.

23. The three-dimensional tomographic imaging apparatus according to claim 21, wherein a plane in which the conveyor belts of the object conveyor are positioned is perpendicular to the first plane.

24. The three-dimensional tomographic imaging apparatus as claimed in claim 15, wherein the direction of extension of said line detectors in at least one of said sets of said detector arrays is different from the direction of extension of said line detectors in the other sets.

25. The three-dimensional tomographic imaging apparatus of claim 15, further comprising a data processing device communicatively coupled to the detector array to process detection data acquired by the detector array.

26. The three-dimensional tomographic imaging apparatus of claim 25, further comprising a display device communicatively connected with the data processing device to display imaging results.