CN113520421A - X-ray section imaging method, storage medium and imaging system - Google Patents
X-ray section imaging method, storage medium and imaging system Download PDFInfo
- Publication number
- CN113520421A CN113520421A CN202010371799.0A CN202010371799A CN113520421A CN 113520421 A CN113520421 A CN 113520421A CN 202010371799 A CN202010371799 A CN 202010371799A CN 113520421 A CN113520421 A CN 113520421A
- Authority
- CN
- China
- Prior art keywords
- ray
- imaging
- ray source
- target object
- detected target
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000003384 imaging method Methods 0.000 title claims abstract description 169
- 238000003860 storage Methods 0.000 title claims abstract description 8
- 238000000034 method Methods 0.000 claims description 38
- 230000008569 process Effects 0.000 claims description 22
- 238000012545 processing Methods 0.000 claims description 15
- 238000012937 correction Methods 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 4
- 230000001788 irregular Effects 0.000 claims description 4
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000003745 diagnosis Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 206010035664 Pneumonia Diseases 0.000 description 1
- 206010047571 Visual impairment Diseases 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000002059 diagnostic imaging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009659 non-destructive testing Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4411—Constructional features of apparatus for radiation diagnosis the apparatus being modular
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4476—Constructional features of apparatus for radiation diagnosis related to motor-assisted motion of the source unit
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
- A61B6/5211—Devices using data or image processing specially adapted for radiation diagnosis involving processing of medical diagnostic data
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/58—Testing, adjusting or calibrating thereof
- A61B6/582—Calibration
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Medical Informatics (AREA)
- Radiology & Medical Imaging (AREA)
- Molecular Biology (AREA)
- Biophysics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Optics & Photonics (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- High Energy & Nuclear Physics (AREA)
- Surgery (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Apparatus For Radiation Diagnosis (AREA)
Abstract
The invention provides an X-ray section imaging method, which comprises the steps of determining the space positions of a detected target object and an X-ray receiver and the initial position of an X-ray source in a 3D space formed by the X-ray source, the detected target object and the X-ray receiver; determining a motion region of the X-ray source in a 3D space based on the spatial positions of the detected target object and the X-ray receiver; controlling an X-ray source to move freely in a moving area, carrying out X-ray imaging on a detected target object for a preset number of times in the free movement to obtain a two-dimensional projection image sequence of the detected target object, and reconstructing a section image sequence by using the two-dimensional image sequence; and a storage medium and an imaging system; has the advantages that: the X-ray image data of the detected target object can be acquired at any projection angle or any SID and the sectional image can be reconstructed without the limitation of the precision of mechanical parts and the space motion track in the X-ray imaging system.
Description
Technical Field
The invention belongs to the technical field of X-ray, and particularly relates to an X-ray section imaging method, a storage medium and an imaging system.
Background
The X-ray imaging technology is an imaging diagnosis means with the largest use amount, the widest application range and the largest equipment quantity in various medical imaging technologies and has extremely high clinical value, is widely used for imaging diagnosis and image guide treatment in the medical and veterinary fields, and is also widely used in the industrial nondestructive testing field.
In a conventional X-ray imaging system, X-rays show different attenuation characteristics during passing through substances with different densities, and density difference information of an internal structure of an imaged object is acquired by detecting the attenuation degree of the X-rays, so that an X-ray image is generated. In such conventional X-ray imaging systems, an X-ray source emits an X-ray beam toward a subject or object (e.g., a patient or a piece of luggage). Hereinafter, the terms "subject" and "object" shall include any object capable of being imaged. The beam, after being attenuated by the subject, impinges upon an array of radiation detectors, the intensity of the beam radiation received at the detector array being dependent upon the degree of attenuation of the X-ray beam by the subject, each detector element of the detector array receiving X-ray photons of the attenuated beam and converting into electrical signals which are digitized and transmitted to a data processing system for processing and producing a digitized X-ray image of the subject or object.
The X-ray imaging system has various structures, and a double-column structure, a suspension frame structure moving machine structure and an electric remote control bed structure are common. Fig. 1 shows a schematic structural diagram of an X-ray imaging system mentioned in the background of the invention. Referring to fig. 1, the X-ray source is attached to a main body frame of the imaging system. In the imaging process, the main body frame slides in the high-precision guide rail 2 to drive the X-ray source 1 to move along the preset fixed rail 3, and emits X-rays to the examinee or the object at the preset position of the fixed rail 3, so that a series of imaging of the examinee or the object can be acquired, and the reconstruction of the section image of the examinee can be completed through the data processing system. In the whole imaging process, the accuracy of the shooting position of the X-ray source is directly influenced due to the main body frame connected with the X-ray source, the high-precision guide rail 2 in sliding fit with the main body frame and the precision of the fixed track moved by the X-ray source, and the reconstructed section imaging quality is further influenced. Therefore, the quality of the image is highly dependent on the design accuracy, manufacturing accuracy, and mounting accuracy of the above-described mechanical apparatus.
In order to ensure that a main body frame of the X-ray imaging system, a high-precision guide rail in sliding fit with the main body frame and a fixed rail for movement of an X-ray source have higher geometric precision requirements, the mechanical equipment needs to be made of high-cost materials such as high-strength aviation aluminum materials, and meanwhile, high-precision machining equipment and strict machining process assistance are needed, so that the manufacturing difficulty and manufacturing cost of the conventional X-ray section imaging system are high, and the popularization and application of an X-ray section imaging system product are greatly limited. Meanwhile, the high-precision requirement on the mechanical structure also limits the flexibility and application scene of the mechanical structure design of the equipment.
In addition, for many products already used in hospitals, the precision of the main body frame of the X-ray imaging system, the guide rail matched with the main body frame and the fixed track for the movement of the X-ray source is not high, and if the main body frame is transformed into a section imaging system on the basis of the main body frame, the guide rail and the fixed track, the mechanical error directly affects the precision of the shooting position of the X-ray source in the imaging process, and further affects the imaging quality. If the related mechanical structure is upgraded with high precision, high transformation cost is generated, the significance of transformation is lost, and the requirement of upgrading and transforming the existing X-ray product in a less developed area cannot be met.
Disclosure of Invention
Based on the summary of the prior art, the invention develops the X-ray section imaging method which can obtain the two-dimensional projection image sequence for forming the section image sequence of the detected target object only by the free movement of the X-ray source in the 3D space.
The present application further aims to provide an X-ray imaging system using the above method, which is not limited by the precision of mechanical components such as guide rails and the like and the spatial motion trajectory in the X-ray imaging system, and can acquire X-ray image data of a detected target object at any projection angle or SID and reconstruct a sectional image.
The specific technical scheme of the invention is as follows:
an X-ray sectional imaging method, the method comprising:
determining the space positions of an X-ray source, a detected object and an X-ray receiver and the initial position of the X-ray source in a 3D space formed by the X-ray source, the detected object and the X-ray receiver;
determining a motion region of the X-ray source in the 3D space based on the spatial positions of the detected target object and the X-ray receiver;
controlling the X-ray source to move freely in the moving area, and carrying out X-ray imaging for a preset number of times on the detected target object in the free movement process so as to obtain a two-dimensional projection image sequence for forming the reconstruction of the section image of the detected target object;
and reconstructing a section image by using the two-dimensional projection image sequence.
Further, the controlling the X-ray source to move freely in the moving area, and performing X-ray imaging on the detected object for a predetermined number of times during the free movement process includes:
the positions of the X-ray sources in imaging are in a known geometrical relationship with the positions of the X-ray receivers.
Further, the controlling the X-ray source to move freely in the moving area, and performing X-ray imaging on the detected object for a predetermined number of times during the free movement process includes:
the projection of the motion trail of the X-ray source on the X-ray receiver is a straight line or an irregular curve.
Further, the controlling the X-ray source to move freely in the moving area and perform X-ray imaging on the detected object for a predetermined number of times during the free movement further includes:
and setting the motion trail of the geometric center of the X-ray source before controlling the X-ray source to move freely in the motion area.
Further, the projection of the motion trail on the X-ray receiver is any one of a straight line or an irregular curve.
Further, a predetermined imaging position of the X-ray source is set on the motion trajectory, the predetermined imaging position having a known geometric relationship with the position of the X-ray receiver.
Further, the method also comprises the following steps:
and acquiring an actual imaging position of the X-ray source on the motion track, comparing the actual imaging position with the preset imaging position, and performing geometric correction on the two-dimensional projection image acquired at the actual imaging position when the actual imaging position is inconsistent with the preset imaging position.
A computer readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the method of any of the above.
An X-ray imaging system, the imaging system comprising:
the X-ray source generates X-rays and is used for moving along a motion track in the process of acquiring the section image of the detected target object;
an X-ray receiver for receiving X-rays from the X-ray source and detecting the received X-rays for image generation;
the space position detection module is used for positioning the space positions of the detected target object and the X-ray receiver and the initial position of the X-ray source in a 3D space formed by the X-ray source, the detected target object and the X-ray receiver;
the calculation module is used for determining a motion region of the X-ray source in the 3D space according to the spatial positions of the detected target object and the X-ray receiver;
and the processing module is used for controlling the X-ray source to move freely in the movement area, carrying out X-ray imaging for a preset number of times on the detected target object in the free movement process so as to obtain a two-dimensional projection image sequence of the detected target object, and carrying out section image reconstruction by using the two-dimensional projection image sequence.
Further, the respective positions of the X-ray sources at the time of imaging are in a known geometric relationship with the positions of the X-ray receivers.
Furthermore, the projection of the motion trajectory of the X-ray source on the X-ray receiver is a straight line or an irregular curve.
Further, the method also comprises the following steps:
and the track is used for limiting the X-ray source to move in the plane according to a preset motion track.
Further, the motion trajectory is any one of a straight line and a curved line.
Further, preset imaging positions of the X-ray source are set on the motion trail, and the preset imaging positions are arranged at equal intervals or equal arc lengths.
Further, the method also comprises the following steps:
and the correction module is used for acquiring the actual imaging position of the X-ray source on the motion track, comparing the actual imaging position with the preset imaging position, and performing geometric correction on the two-dimensional projection image acquired at the actual imaging position when the actual imaging position is inconsistent with the preset imaging position.
The invention has the following beneficial effects:
1. according to the technical scheme, the X-ray source is controlled to move freely in a space movement area, and multiple times of X-ray imaging are carried out on the detected target object in the free movement process. The section image of any section of the detected target object can be obtained by carrying out X-ray imaging on the detected target object at a plurality of projection angles to obtain an image. Compared with the traditional X-ray section imaging system which depends on mechanical components such as a high-precision guide rail, the X-ray section imaging system can freely move in a selected space movement area, can acquire X-ray image data of a detected target object at any projection angle or any SID (local identification) and reconstruct a section image, and is not limited by the precision of the mechanical components such as the guide rail in the X-ray imaging system and the limitation of space movement tracks.
2. Based on the imaging method, the X-ray section imaging system can adopt general precision mechanical parts adopted by the conventional X-ray system at present or a mechanical structure design with a special structural shape, so that the equipment has a simple and light structure, is convenient to manufacture and deploy in a large quantity, has a product price remarkably reduced compared with the existing X-ray section imaging system based on the high-precision mechanical parts, has an obvious price competition advantage, and can adapt to more application scenes.
3. The image chain component and the key mechanical parts integrated by the method are applied to an X-ray imaging system with low traditional precision level for product technology upgrading, so that the method is low in modification cost, short in modification period, low in requirement threshold on technology upgrading equipment, excellent in economy, timeliness and universality, capable of effectively meeting the requirement of X-ray section image inspection in undeveloped areas, for example, the problem that the diagnosis capability of early images of new coronary pneumonia is seriously insufficient is solved, the method has a good market popularization prospect, and a brand-new powerful X-ray section image detection means is provided for medical treatment, veterinarians and industrial detection.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a schematic diagram of an X-ray imaging system according to the background art;
FIG. 2 is a flow chart illustrating a method for X-ray sectional imaging according to an embodiment of the present application;
FIG. 3 is an elevation view of a geometry of an X-ray source and an X-ray receptor at different imaging positions in accordance with an embodiment of the present application;
FIG. 4 is a side view of FIG. 3;
FIG. 5 is an elevation view of another X-ray source in a geometric relationship with an X-ray receptor at different imaging positions in accordance with an embodiment of the present application;
FIG. 6 is a side view of FIG. 5;
FIG. 7 is a block diagram of an X-ray sectional imaging system according to an embodiment of the present disclosure;
FIG. 8 is a block diagram of an X-ray sectional imaging system according to an embodiment of the present disclosure;
fig. 9 is a structural framework diagram of yet another X-ray sectional imaging system according to an embodiment of the present application.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
The X-ray imaging technology comprises Digital X-ray imaging (DR-Digital Radiography), images formed by DR have larger dynamic display range, and meanwhile, the DR can fully utilize modern computer image processing technology to realize better diagnosis effect.
Throughout the description, SID refers to the distance between the focal point of the X-ray source 1 and the center of the receiving surface of the X-ray receiver 4. The slice plane, i.e. the tomosynthesis plane, is a thin slice parallel to the receiving surface of the X-ray receiver 4.
Referring to fig. 2, an X-ray sectional imaging method includes:
step S101: in a 3D space formed by the X-ray source 1, the detected object and the X-ray receiver 4, the space positions of the detected object and the X-ray receiver 4 and the initial position of the X-ray source 1 are determined.
The spatial position information of the X-ray source 1, the detected target object and the X-ray receiver 4 can be acquired by a positioning device. Positioning devices include, but are not limited to, gyroscope positioning devices and the like.
Step S102: based on the spatial positions of the detected object and the X-ray receiver 4, the motion region of the X-ray source 1 in the 3D space is determined.
The motion area of the X-ray source 1 is determined according to the spatial position information of the detected target object and the X-ray receiver 4, and the range of the motion area needs to satisfy: the X-rays emitted by the X-ray source 1 during the movement of the region are projected onto the X-ray receptor 4. In particular, to ensure imaging quality and to reduce the exposure of the patient to as little X-ray radiation as possible, it is preferred that the X-ray source 1 is moved with its focal point aligned with the center of the receiver receiving surface. The motion region can be either a plane or a 3D space.
Step S103: the X-ray source 1 is controlled to move freely in the moving area, and X-ray imaging is carried out on the detected object for a preset number of times in the free movement process, so as to obtain a two-dimensional projection image sequence for forming a section image sequence of the detected object.
The predetermined number of times is determined according to the characteristics and the size of the detected target object required by the user, and can be set by a program or manually input in the X-ray imaging system. The predetermined number of times may be 15 times, 30 times or 60 times, but is not limited to the above-mentioned selection of values. The free motion is an orderly motion, which is required to satisfy that the X-ray source 1 moves from one side of the normal of the detector to the other side sequentially within the motion region. In the present application, the free motion includes linear motion and non-linear motion. During motion, the SID may be fixed or variable.
Step S104: and reconstructing a section image by using the two-dimensional projection image sequence.
In a conventional X-ray sectional imaging system, a projection angle must be accurately positioned at a predetermined exposure position in a moving process of an X-ray source 1, and once an error range of an actual projection angle is too large, typically, when the error is more than 1%, the quality of a sectional image obtained by reconstructing a sectional image of a two-dimensional projection image of a detected target object acquired at the actual projection angle is remarkably reduced, which may cause serious artifacts to appear and prevent a doctor from correctly diagnosing the image. By adopting the method, even if the projection angle exceeds the preset projection angle and the error is more than 5%, the two-dimensional projection image sequence is obtained, the section image obtained after the section image reconstruction is carried out on the image sequence is still attached to the actual characteristic of the detected object, and the artifact-free reconstruction of the section image of the detected object can be realized. Especially, when the actual projection angle and the predetermined projection angle have a large deviation in a certain range in the nonlinear movement process of the X-ray source 1, and typically, when the error of the projection angle reaches 5% -50%, the accurate reconstruction of the section image of the detected target object can be realized.
In summary, according to the technical scheme, the X-ray source 1 is controlled to move freely in the space movement area, and multiple times of X-ray imaging are performed on the detected target object in the free movement process. The section image of any section of the detected target object can be obtained by carrying out X-ray imaging on the detected target object at a plurality of projection angles to obtain an image. Compared with the traditional X-ray section imaging system which depends on mechanical components such as a high-precision guide rail, the X-ray section imaging system can freely move in a selected space movement area, can acquire X-ray image data of a detected target object at any projection angle or any SID (local identification) and reconstruct a section image, and is not limited by the precision of the mechanical components such as the guide rail in the X-ray imaging system and the limitation of space movement tracks.
Specifically, controlling the X-ray source 1 to move freely in the moving area, and performing X-ray imaging on the detected object for a predetermined number of times during the free movement includes: the respective positions of the X-ray source 1 during imaging are in a known geometrical relationship with the position of the X-ray receptor 4.
In one possible embodiment, as shown in fig. 3 and 4, the respective positions of the X-ray source 1 during imaging and the position of the X-ray receiver 4 satisfy: the projections of the trajectory of the X-ray source 1 at all positions on the X-ray receptor 4 are in a defined space in a conical space around the detector normal. . In this embodiment, the detected target object is rapidly image-acquired by a series of different projection angles of the radiation source located in the conical space, and the acquired image information constitutes a two-dimensional projection image sequence. The projection image sequence data information is stored in a computer as original information and can be directly used by the reconstruction of subsequent section images.
In another possible embodiment, as shown in fig. 5 and 6, the respective positions of the X-ray source 1 during imaging and the position of the X-ray receiver 4 satisfy: the projection of the movement trajectory of the X-ray source 1 on the X-ray receiver 4 can be any curve, i.e. free movement.
In this embodiment, the number of planes is set to 2. Data processing is performed in ways including, but not limited to: the detected target object is subjected to rapid image acquisition through a series of different projection angles, and acquired image information forms a two-dimensional projection image sequence and is stored in a computer as original image information which can be directly used by subsequent section image reconstruction.
The method for controlling the X-ray source 1 to move freely in the moving area and carrying out X-ray imaging on the detected target for a preset number of times in the free movement process further comprises the following steps: before controlling the X-ray source 1 to move freely in the moving area, setting the moving track of the geometric center of the X-ray source in a plane, wherein the specific moving track is matched with the practical application environment. The motion trajectory may be any one of a straight line or a curved line, and may be a linear trajectory or a nonlinear trajectory. The motion trajectory further highlights the flexible characteristic of free motion of the X-ray source 1, has obvious technical advantages compared with the motion trajectory that the X-ray source 1 in the traditional X-ray tangent plane imaging system can only follow an arc line, can be suitable for various environments and application places, and obviously widens the application range of the X-ray imaging system.
A predetermined imaging position of the X-ray source 1 is set on the motion trajectory, the predetermined imaging position having a known geometrical relationship with the position of the X-ray receptor. The predetermined imaging positions can be set in sequence on the motion track in a computer system by a program setting or a manual input mode and are determined by combining the specific application environment of the X-ray imaging system and the characteristics of the detected target object required by a user. . The geometric relationship includes, but is not limited to, the same SID or different SIDs at different locations; and the setting of equal interval or equal arc length can be selected on the motion track adjacent to the preset imaging position, and the setting of unequal interval or unequal arc length can also be selected. In the scheme, the adjacent preset imaging positions of the X-ray source 1 on the motion trail are preferably arranged at equal intervals or equal arc lengths. It would be more advantageous to simplify the mechanical system control complexity.
Further, the X-ray sectional imaging method further includes:
acquiring an actual imaging position of the X-ray source 1 on the motion trajectory, and comparing the actual imaging position with a preset imaging position: when the actual imaging position does not coincide with the predetermined imaging position, the projected image acquired at the actual imaging position is geometrically corrected. For example, when the predetermined imaging position shows a photographing angle of 3 °, and the actual imaging position shows a photographing angle of 3.6 °, geometric correction of the corresponding data information is performed on the image data of the detected object obtained at the actual imaging position. The geometric correction process ensures the accurate matching degree of the final three-dimensional data of the detected target object and the real object, and simultaneously ensures the reconstruction precision of the algorithm.
And after images of the detected target object at different projection angles are acquired, outputting a visual tangent plane reconstruction image sequence through reconstruction.
A computer readable storage medium having stored thereon instructions, the respective instructions when executed by a processor implementing the above-described imaging method. It will be appreciated by those skilled in the art that the above-described imaging method can be implemented by a program instructing associated hardware, and the associated program can be stored in a computer-readable storage medium, such as a read-only memory, a magnetic disk or an optical disk. Optionally, the imaging method in the foregoing embodiments may also be implemented by using one or more computing units, and accordingly, the execution process in the foregoing embodiments may be implemented in the form of hardware, and may also be implemented in the form of software functional modules. The present invention is not limited to any specific form of combination of hardware and software.
In a second aspect, an embodiment of the present application further provides an X-ray imaging system, which is shown in fig. 7 to 9, and includes:
the X-ray source 1 generates X-rays and is used for moving along a motion track in the process of acquiring a section image of a detected target object; in particular, the operating voltage of the X-ray source 1 ranges from 20kvp to 180 kvp.
An X-ray receiver 4 for receiving X-rays from the X-ray source 1 and detecting the received X-rays for image generation; in particular, the flat panel detector is commonly used.
And the space position detection module 5 is used for positioning the space positions of the detected object and the X-ray receiver 4 and the initial position of the X-ray source 1 in a 3D space formed by the X-ray source 1, the detected object and the X-ray receiver 4. In the scheme, the spatial position detection module can select but is not limited to a gyroscope, and the gyroscopes are arranged in the X-ray source 1, the detected target object and the X-ray receiver 4.
The calculation module 6 is used for determining a motion area of the X-ray source 1 in a 3D space according to the spatial positions of the detected target object and the X-ray receiver 4; is in signal connection with the spatial position detection module 5.
And the processing module 7 is used for controlling the X-ray source 1 to move freely in the movement area, carrying out X-ray imaging for a preset number of times on the detected target object in the free movement process so as to obtain a two-dimensional projection image sequence for forming a section image sequence of the detected target object, and carrying out section image reconstruction by using the section two-dimensional image sequence. . Specifically, the processing module 7 is a software program or a hardware processing unit provided in the computer.
The processing module 7 may comprise a computer with typical hardware, such as a processor, and an operating system for running various software programs and/or communication applications, may be configured to transmit image-related data between the different devices, communicatively connected with the X-ray source 1, the X-ray receiver 4, the spatial position detection module 5 and the calculation module 6. Further, the processing module 7 may be communicatively connected to the display module 8, and is configured to display spatial positions of the X-ray source 1 and the X-ray receiver 4, and output a sequence of finally obtained visualized sectional images. The display module 8 may be a conventional computer display.
The operation of the different components of the X-ray imaging system may be synchronized by the processing module 7. For example, the processing module 7 may control the X-ray source 1 to move along the motion trajectory and at the imaging position to generate X-ray pulses towards the detected object. At the same time, the processing module 7 may also control the operation of the X-ray receiver 4 (e.g. by sending it an appropriate synchronization signal) so that the exposure and readout windows coincide with the X-ray on and off periods associated with each X-ray pulse. The positioning information sent by the spatial position detection module 5 can be received and effectively processed, so that the real-time positions of the X-ray source 1 and the X-ray receiver 4 are determined, and the spatial positions of the X-ray source 1 and the X-ray receiver 4 are displayed on the display module 8, so that the purpose of aligning the central points of the X-ray source 1 and the X-ray receiver 4 is achieved. The display of the section image of the detected target object can be further processed.
The respective positions of the X-ray source 1 during imaging are in a known geometrical relationship with the position of the X-ray receptor 4. Specifically, the movement region of the X-ray source 1 is determined according to the spatial position information of the detected target object and the X-ray receiver 4, and the range of the movement region needs to satisfy: the X-rays emitted by the X-ray source 1 during the movement of the region are projected onto the X-ray receptor 4. The description of the known geometric relationships can be described with reference to fig. 3 to 6 and the related descriptions, and will not be repeated herein.
The X-ray sectional imaging system further comprises a rail 9 for limiting the movement of the X-ray source 1 in a plane according to a predetermined movement locus. The movement locus can be any one of a straight line or a curve, the movement locus further highlights the flexible characteristic of the free movement of the X-ray source 1, compared with the movement locus of the X-ray source 1 in the traditional X-ray tangent plane imaging system which can only be in an arc line shape, the movement locus has obvious technical advantages, can be suitable for various environments and application places, and obviously widens the application range of the X-ray imaging system.
In the scheme, the preset imaging positions of the X-ray source 1 are set on the motion trail, and the preset imaging positions can be arranged at equal intervals or in equal arc length, so that the control complexity of a mechanical system is simplified.
The X-ray imaging system further comprises:
a correction module 10, configured to acquire an actual imaging position of the X-ray source 1 on the motion trajectory, and compare the actual imaging position with a predetermined imaging position: when the actual imaging position does not coincide with the predetermined imaging position, the projected image acquired at the actual imaging position is geometrically corrected. For example, when the predetermined imaging position shows a photographing angle of 3 °, and the actual imaging position shows a photographing angle of 3.6 °, the image data of the detected object obtained at the actual imaging position is geometrically corrected by the corresponding data information. The geometric correction process ensures the accurate matching degree of the final three-dimensional data of the detected target object and the real object, and simultaneously ensures the reconstruction precision of the algorithm.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (15)
1. An X-ray sectional imaging method, comprising:
determining the space positions of an X-ray source, a detected object and an X-ray receiver and the initial position of the X-ray source in a 3D space formed by the X-ray source, the detected object and the X-ray receiver;
determining a motion region of the X-ray source in the 3D space based on the spatial positions of the detected target object and the X-ray receiver;
controlling the X-ray source to move freely in the moving area, and carrying out X-ray imaging for a preset number of times on a detected target object in the free movement process so as to obtain a two-dimensional projection image sequence of the detected target object;
and reconstructing a section image by using the two-dimensional projection image sequence of the detected target object.
2. The X-ray sectional imaging method as claimed in claim 1, wherein the controlling of the X-ray source to move freely in the moving region and the X-ray imaging of the detected object for the predetermined times during the free movement comprises:
the positions of the X-ray sources in imaging are in a known geometrical relationship with the positions of the X-ray receivers.
3. The X-ray sectional imaging method according to claim 2, wherein the X-ray source is controlled to move freely in the moving region, and X-ray imaging is performed on the detected object for a predetermined number of times during the free movement.
4. The method as claimed in claim 3, wherein the controlling the X-ray source to move freely in the moving region and the X-ray imaging the detected object for a predetermined number of times during the free movement further comprises:
and setting a motion track of a geometric center of the X-ray source in the plane before controlling the X-ray source to move freely in the motion area.
5. The X-ray sectional imaging method according to claim 4, wherein the motion trajectory is any one of a straight line and a curved line.
6. The X-ray sectional imaging method according to claim 5, wherein a predetermined imaging position of the X-ray source is set on the motion trajectory, the predetermined imaging position having a known geometric relationship with a position of the X-ray receptor.
7. The X-ray sectional imaging method according to claim 6, further comprising:
and acquiring an actual imaging position of the X-ray source on the motion track, comparing the actual imaging position with the preset imaging position, and performing geometric correction on the two-dimensional projection image acquired at the actual imaging position when the actual imaging position is inconsistent with the preset imaging position.
8. A computer-readable storage medium having instructions stored thereon, wherein the instructions, when executed by a processor, implement the method of any of claims 1-7.
9. An X-ray imaging system, characterized in that the imaging system comprises:
the X-ray source generates X-rays and is used for moving along a motion track in the process of acquiring a two-dimensional projection image of the detected target object;
an X-ray receiver for receiving X-rays from the X-ray source and detecting the received X-rays for image generation;
the space position detection module is used for positioning the space positions of the detected target object and the X-ray receiver and the initial position of the X-ray source in a 3D space formed by the X-ray source, the detected target object and the X-ray receiver;
the calculation module is used for determining a motion region of the X-ray source in the 3D space according to the spatial positions of the detected target object and the X-ray receiver;
and the processing module is used for controlling the X-ray source to move freely in the moving area, carrying out X-ray imaging for a preset number of times on the detected target object in the free movement process so as to obtain a two-dimensional projection image sequence of the detected target object, and carrying out section image reconstruction by using the image sequence.
10. The X-ray imaging system of claim 9, wherein each position of the X-ray source at the time of imaging is in a known geometric relationship to a position of the X-ray receptor.
11. The X-ray imaging system of claim 10, wherein the projection of the trajectory of the X-ray source onto the X-ray receptor is a straight line or an irregular curve.
12. The X-ray imaging system of claim 11, further comprising:
and the track is used for limiting the X-ray source to move in the plane according to a preset motion track.
13. The X-ray imaging system of claim 12, wherein the motion trajectory is any one of a straight line or a curved line.
14. The X-ray imaging system of claim 13, wherein predetermined imaging positions of the X-ray source are set on the motion trajectory, the predetermined imaging positions being equally spaced or equally arc-long arranged.
15. The X-ray imaging system of claim 14, further comprising:
and the correction module is used for acquiring the actual imaging position of the X-ray source on the motion track, comparing the actual imaging position with the preset imaging position, and performing geometric correction on the two-dimensional projection image acquired at the actual imaging position when the actual imaging position is inconsistent with the preset imaging position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010371799.0A CN113520421A (en) | 2020-05-06 | 2020-05-06 | X-ray section imaging method, storage medium and imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010371799.0A CN113520421A (en) | 2020-05-06 | 2020-05-06 | X-ray section imaging method, storage medium and imaging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113520421A true CN113520421A (en) | 2021-10-22 |
Family
ID=78124137
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010371799.0A Pending CN113520421A (en) | 2020-05-06 | 2020-05-06 | X-ray section imaging method, storage medium and imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113520421A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116570306A (en) * | 2023-07-11 | 2023-08-11 | 北京友通上昊科技有限公司 | X-ray-based mobile 3D imaging machine and three-dimensional imaging data acquisition method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102100566A (en) * | 2009-12-22 | 2011-06-22 | 通用电气公司 | Medical imaging system and method |
| CN104138267A (en) * | 2013-05-08 | 2014-11-12 | 上海万景医疗器械有限公司 | X-ray imaging method and X-ray imaging device |
| CN107831180A (en) * | 2016-09-14 | 2018-03-23 | 奚岩 | X ray in situ imaging method and system |
| CN109223012A (en) * | 2018-07-18 | 2019-01-18 | 江苏影医疗设备有限公司 | Imaging device |
| CN109419523A (en) * | 2017-08-29 | 2019-03-05 | 西门子保健有限责任公司 | Run method, X-ray apparatus and the computer program product of X-ray apparatus |
| CN110602990A (en) * | 2017-03-17 | 2019-12-20 | 普兰梅卡有限公司 | Patient movement correction method for cone beam computed tomography |
-
2020
- 2020-05-06 CN CN202010371799.0A patent/CN113520421A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102100566A (en) * | 2009-12-22 | 2011-06-22 | 通用电气公司 | Medical imaging system and method |
| CN104138267A (en) * | 2013-05-08 | 2014-11-12 | 上海万景医疗器械有限公司 | X-ray imaging method and X-ray imaging device |
| CN107831180A (en) * | 2016-09-14 | 2018-03-23 | 奚岩 | X ray in situ imaging method and system |
| CN110602990A (en) * | 2017-03-17 | 2019-12-20 | 普兰梅卡有限公司 | Patient movement correction method for cone beam computed tomography |
| CN109419523A (en) * | 2017-08-29 | 2019-03-05 | 西门子保健有限责任公司 | Run method, X-ray apparatus and the computer program product of X-ray apparatus |
| CN109223012A (en) * | 2018-07-18 | 2019-01-18 | 江苏影医疗设备有限公司 | Imaging device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116570306A (en) * | 2023-07-11 | 2023-08-11 | 北京友通上昊科技有限公司 | X-ray-based mobile 3D imaging machine and three-dimensional imaging data acquisition method |
| CN116570306B (en) * | 2023-07-11 | 2024-03-01 | 北京友通上昊科技有限公司 | X-ray-based mobile 3D imaging machine and three-dimensional imaging data acquisition method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP1869643B1 (en) | Image processing device and method for blood flow imaging | |
| CA2904111C (en) | High-resolution computed tomography | |
| US8232527B2 (en) | Image generation method and device for emission computed tomography | |
| CN102846333B (en) | The method and system of the scatter correction in x-ray imaging | |
| EP2250965A1 (en) | Image acquisition method, device and radiography system | |
| US9743891B2 (en) | Super-resolution tomosynthesis imaging systems and methods | |
| CN110533597B (en) | Artifact processing method, artifact processing device, rotation center determining device, artifact processing equipment and storage medium | |
| JP4537129B2 (en) | System for scanning objects in tomosynthesis applications | |
| JP2007021217A (en) | Method for generating image in body range of moving living body and x-ray diagnostic equipment | |
| CN101352348B (en) | Method for recording measured data of a patient while taking account of movement operations, and an associated medical device | |
| US20090245457A1 (en) | Image generation method and device for emission computed tomography | |
| JP2005021675A (en) | Tomograph apparatus | |
| CN107945850B (en) | Method and device for processing medical images | |
| US20130058556A1 (en) | X-ray diagnostic apparatus, x-ray diagnostic method and stent for x-ray diagnosis | |
| CN116327224A (en) | Translation scanning tomography method, device and readable storage medium | |
| JPS63290547A (en) | Television tomographic imaging apparatus | |
| CN113520421A (en) | X-ray section imaging method, storage medium and imaging system | |
| JP7242288B2 (en) | Medical image diagnosis device and model learning device | |
| CN110731790B (en) | Image forming apparatus and image forming method | |
| CN111317496A (en) | CT imaging device and imaging method | |
| US8054941B2 (en) | Method for the production of angiography recordings | |
| JPS62139630A (en) | X-ray ct apparatus | |
| US20220319072A1 (en) | Medical image processing apparatus and medical image processing method | |
| CN108024779B (en) | Computed tomography image generating apparatus | |
| US4464775A (en) | Method and apparatus for collecting X-ray absorption data in X-ray computed tomography apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |