Imaging device, imaging method, and imaging apparatus

Abstract

An imaging device and imaging method based on a distributed light source and a distributed detector. The imaging device comprises: a distributed light source (100), a detector (200), and a controller (300). The distributed light source (100) comprises a plurality of targets. The controller (300) is connected to both the distributed light source (100) and the detector (200), and is used for controlling at least two targets of the distributed light source (100) to emit rays to a target object. The detector (200) is used for acquiring target projection data formed by means of the rays irradiating the target object. The controller (300) is further used for performing data processing on the target projection data to obtain a target detection image.

Description

Imaging device, imaging method, and imaging apparatus

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on April 17, 2023, with application number 202310407128.9 and application name “A five-in-one imaging device based on distributed light source and distributed detector”, the full text of which is hereby incorporated by reference. Technical Field

[0003] The present application relates to the field of imaging technology, and in particular to an imaging device, an imaging method, and an imaging apparatus. Background Art

[0004] With the development of computer technology and image processing technology, there are more and more types of imaging equipment. For example, dental imaging equipment has become a commonly used imaging equipment.

[0005] Typically, images detected by dental imaging equipment require further processing and analysis; therefore, the quality of images detected by dental imaging equipment is crucial.

[0006] Summary of the Invention

[0007] Based on this, and addressing the above-mentioned technical issues, in a first aspect, the present disclosure provides an imaging device capable of improving image quality. The imaging device comprises: a distributed light source, a detector, and a controller. The distributed light source includes multiple targets. The controller is connected to the distributed light source and the detector, respectively, and is configured to control at least two targets of the distributed light source to emit radiation toward a target object. The detector is configured to acquire target projection data formed by each radiation projected onto the target object. The controller is further configured to process the target projection data to obtain a target detection image.

[0008] In one embodiment, the controller is used to control the at least two target points of the distributed light source to emit rays to the target object, specifically to control the at least two target points of the distributed light source to emit rays to the target object in sequence according to a preset order.

[0009] In one embodiment, the detector includes: at least one of a distributed detector and a dental film detector, wherein the distributed detector includes at least two sub-detectors.

[0010] In one embodiment, there is a gap between every two adjacent sub-detectors.

[0011] In one embodiment, the imaging device further includes: a first rotation axis, and a first rotation arm and a second rotation arm arranged on the first rotation axis, wherein the distributed light source is arranged on the first rotation arm, and each sub-detector is arranged on the second rotation arm; the controller is further used to: control the movement of the distributed light source and each sub-detector relative to the first rotation axis; during the movement of the distributed light source and each sub-detector, control each sub-detector to obtain target projection data formed by each ray irradiating the target object, and perform data processing on the target projection data to obtain a target detection image.

[0012] In one embodiment, the controller is specifically used to: control the first rotating arm and the second rotating arm to rotate around the first rotating axis by a first preset angle to drive the distributed light source and each sub-detector to move; during the movement of the distributed light source and each sub-detector, control each sub-detector to obtain target projection data formed by each ray irradiating the target object, and process the target projection data to obtain at least one of a CT image and a panoramic image.

[0013] In one embodiment, a first slide rail is provided on the first rotating arm, and a second slide rail is provided on the second rotating arm; the distributed light source is provided on the first slide rail, and each sub-detector is provided on the second slide rail via a second rotation axis. The controller is further configured to: control each sub-detector to rotate about the second rotation axis by a second preset angle; control the distributed light source to move along the first slide rail and each sub-detector to move along the second slide rail in the same direction; and control each sub-detector to acquire target projection data formed by each radiation irradiating the target object during movement of the distributed light source and each sub-detector, and perform data processing on the target projection data to obtain a lateral cephalogram.

[0014] In one embodiment, each sub-detector is disposed on a second rotating arm via a second rotating axis. The controller is further configured to: control each sub-detector to rotate about the second rotating axis by a second preset angle; control the first rotating arm and the second rotating arm to rotate about the first rotating axis by a third preset angle to drive movement of the distributed light source and each sub-detector; and control each sub-detector to acquire target projection data formed by each radiation irradiating a target object during movement of the distributed light source and each sub-detector, and perform data processing on the target projection data to obtain a lateral cephalogram.

[0015] In one embodiment, the controller is specifically used to: control the dental film detector to obtain target projection data formed by each ray irradiating the target object, and perform data processing on the target projection data to obtain at least one of a dental tomography image and a dental film image.

[0016] In one embodiment, the plurality of target points are spaced apart along a predetermined direction.

[0017] In a second aspect, the present disclosure further provides an imaging method capable of improving image quality, which is applied to the imaging device described in any one of the first aspects above, and the imaging method includes: controlling at least two target points of a distributed light source in the imaging device to emit rays toward the target object; controlling the detector in the imaging device to obtain target projection data formed by each ray irradiating the target object; and performing data processing on the target projection data to obtain a target detection image.

[0018] In one embodiment, controlling the at least two target points of the distributed light source in the imaging device to emit rays toward the target object includes: controlling the at least two target points of the distributed light source to emit rays toward the target object in sequence according to a preset order.

[0019] In a third aspect, the present application further provides an imaging device capable of improving image quality, the imaging device being applied to the imaging equipment described in any one of the first aspects above, the imaging device comprising: a first control module, a second control module, and a processing module. The first control module is configured to control at least two target points of a distributed light source in the imaging device to emit rays toward a target object. The second control module is configured to control a detector in the imaging device to acquire target projection data formed by each ray irradiating the target object. The processing module is configured to process the target projection data to obtain a target detection image.

[0020] In a fourth aspect, the present application also provides a non-volatile computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the processor implements the steps of the method described in the second aspect above.

[0021] In a fifth aspect, the present application further provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the processor implements the steps of the method described in the second aspect.

[0022] In the above-mentioned imaging equipment, imaging method, device, storage medium and program product, the controller is respectively connected to the distributed light source and the detector, and the controller controls at least two target points of the distributed light source including multiple target points to emit rays to the target object, so that the detector can obtain target projection data formed by each ray irradiating the target object, and the target projection data is processed by the controller to obtain a target detection image. Among them, by controlling at least two target points of the distributed light source to emit rays to the target object, the cone angle of the light source can be reduced, thereby suppressing the influence of cone angle artifacts and scattering effects, obtaining more accurate target projection data, and then the target detection image obtained by data processing of the target projection data has higher image quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a structural diagram of an imaging device according to an embodiment;

[0024] FIG2 is a structural diagram of an imaging device in another embodiment;

[0025] FIG3 is a light path diagram during CT imaging and panoramic photography in one embodiment;

[0026] FIG4 is a structural diagram of a first rotating arm in one embodiment;

[0027] FIG5 is a structural diagram of a second rotating arm in one embodiment;

[0028] FIG6 is a front view of a distributed detector in one embodiment;

[0029] FIG7 is a diagram of the optical path during dental film shooting and dental tomography in one embodiment;

[0030] FIG8 is a structural diagram of a distributed light source in one embodiment;

[0031] FIG9 is a light path diagram of rays emitted by a distributed light source in one embodiment;

[0032] FIG10 is a light path diagram of a sub-detector irradiated by radiation in one embodiment;

[0033] FIG11 is a light path diagram of a multi-target lateral cephalogram in one embodiment;

[0034] FIG12 is a light path diagram of a single-target lateral cephalogram in one embodiment;

[0035] FIG13 is a schematic flow chart of an imaging method in one embodiment;

[0036] FIG14 is a block diagram of the structure of an imaging device in one embodiment. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0038] Dental imaging equipment generally uses an X-ray source, and this type of dental imaging equipment can be called a dental X-ray imaging device. The multifunctionalization of dental X-ray imaging equipment is the mainstream design trend in the industry. At present, the dental cone beam CT (CBCT) has four functions, namely CT imaging, panoramic photography, cephalometric photography and dental radiography. CBCT realizes these four functions by integrating multiple sets of independent single-target X-ray sources and detectors, and realizes various imaging functions through their combination. Specifically, CT imaging, panoramic photography, and cephalometric photography are realized by one set of CT X-ray sources and detectors, and dental radiography is realized by another set of X-ray sources and detectors. However, this CBCT has the following defects:

[0039] (1) The cone angle of a single-target X-ray source is large, and the resulting cone angle artifacts and scattering effects have a significant impact on image quality.

[0040] (2) The detector uses a detector with a large imaging area, which makes the detector cost higher.

[0041] (3) Another set of X-ray sources is required when taking dental radiographs, which makes the use of the X-ray source inefficient.

[0042] (4) To obtain a lateral image of the skull, the rays emitted by a single-target X-ray source need to be able to cover the skull. Therefore, the distance between the X-ray source and the detector is relatively far, which makes the CBCT occupy a larger area.

[0043] (5) Dental tomography has the advantages of lower scan dose compared to CT imaging and higher imaging quality compared to dental radiographs. However, this CBCT cannot perform dental tomography, which means that the CBCT has limited functional capabilities. The existing CBCT multifunctional approach requires an additional X-ray source and detector to achieve dental tomography, but this will increase hardware costs.

[0044] Based on the above defects, it is necessary to propose effective technical means to solve them.

[0045] In one embodiment, as shown in FIG1 , a structural diagram of an imaging device includes a distributed light source 100, a detector 200, and a controller 300. The controller 300 is connected to the distributed light source 100 and the detector 200, respectively. The distributed light source 100 includes multiple target points. The controller 300 is configured to control at least two target points of the distributed light source 100 to emit radiation toward a target object. The detector 200 is configured to acquire target projection data formed by each radiation projected onto the target object. The controller 300 is further configured to process the target projection data to obtain a target detection image.

[0046] For example, the distributed light source 100 may include a novel distributed radiation source having multiple cathodes, which includes multiple cathodes and a linear anode. The anode includes multiple targets, wherein the cathodes correspond to the targets one by one, and the cathodes and anodes are integrated into a vacuum linear tube. By controlling the electron beam targeting, pulsed radiation can be emitted from each target in sequence, and the beam emission time and duty cycle are adjustable. For example, the distributed light source 100 may be a radiation source based on a carbon nanotube cold cathode, which has the characteristics of densely arranged small focal spots, low energy consumption, long life, and precise control of rapid beam switching at each target.

[0047] Of course, the distributed light source 100 in the embodiment of the present application may also include other forms of multi-target light sources, which is not limited in the embodiment of the present application.

[0048] The detector 200 may be a radiation detector, and its working principle is to convert radiation energy into an electrical signal that can be recorded. It should be noted that the radiation involved in the embodiments of the present application may include but is not limited to X-rays.

[0049] For example, the controller 300 can be a device with a control function provided on the imaging device, or can be a device with a control function provided outside the imaging device. The controller 300 can control the distributed light source 100 and the detector 200 separately. In addition, the connection between the controller 300 and the distributed light source 100 and the detector 200 can be a wireless connection or a wired connection.

[0050] The target object may include teeth, a skull, etc., and the target detection image may include but is not limited to a two-dimensional image and / or a three-dimensional image corresponding to the target object.

[0051] Optionally, the controller 300 is used to control the first target point in the distributed light source 100 to emit a first ray, the detector 200 obtains first target projection data formed by the first ray irradiating the target object, and uploads the first target projection data to the controller 300 .

[0052] The controller 300 is then used to control the second target point in the distributed light source 100 to emit a second ray. The detector 200 obtains second target projection data formed by the second ray irradiating the target object, and uploads the second target projection data to the controller 300 .

[0053] The controller 300 performs data processing such as reconstruction on the received first target projection data and second target projection data to obtain a target detection image, wherein the reconstruction includes FDK-type reconstruction or iterative reconstruction.

[0054] It should be noted that more target points in the distributed light source 100 can be controlled to emit rays as needed, so that the detector obtains the target projection data corresponding to each target point, and then obtains the target detection image based on the position of each target point and the target projection data corresponding to each target point. The specific number of target points emitting rays can be set as needed and is not limited here.

[0055] In summary, the controller 300 is connected to the distributed light source 100 and the detector 200, respectively. The controller 300 controls at least two target points of the distributed light source 100, which includes multiple target points, to emit radiation toward the target object, enabling the detector 200 to acquire target projection data formed by each radiation irradiating the target object. The controller 300 then processes the target projection data to obtain a target detection image. By controlling at least two target points of the distributed light source 100 to emit radiation toward the target object, the cone angle of the light source can be reduced, thereby suppressing the effects of cone angle artifacts and scattering effects, obtaining more accurate target projection data, and further, processing the target projection data to obtain a target detection image with higher image quality.

[0056] In one embodiment, the controller 300 is specifically configured to control at least two target points of the distributed light source 100 to emit rays toward the target object in sequence according to a preset order.

[0057] For example, the preset order can be 1, 3, 5 targets, or 1, 2, 3, 4, 5 targets, and can be set as needed. Furthermore, the preset order can be the same or different for CT imaging, panoramic photography, cephalography, dental radiography, and dental tomography. It should be understood that the above "1, 2, 3, 4, 5" can represent the target numbers.

[0058] Optionally, an implementation method of controlling at least two target points of the distributed light source 100 to emit rays toward the target object in sequence according to a preset order may include: controlling at least two cathodes of the distributed light source 100 to emit electron beams to bombard corresponding target points in sequence according to a preset order, so that at least two target points emit rays toward the target object in sequence according to the preset order.

[0059] In addition, a point on the target detection image requires multiple projection data obtained by multiple rays passing through the corresponding points on the target object to determine. Therefore, the purpose of at least two target points emitting rays to the target object in sequence according to a preset order is to determine which target point corresponds to which target projection data, so that the controller 300 can determine the required projection data from the target projection data when reconstructing a point on the target detection image.

[0060] In this embodiment, the distributed light source 100 emits rays in sequence from at least two target points. Compared with the traditional single-target point emitting rays, it can not only reduce the cone angle of the light source and suppress the influence of cone angle artifacts and scattering effects, but also the distributed light source 100 emits rays at a fast speed, does not require the target point to move, and can also reduce motion artifacts. Therefore, the use of the distributed light source 100 can improve image quality.

[0061] In one embodiment, the detector 200 includes: a distributed detector and / or a dental film detector 201 , wherein the distributed detector includes at least two sub-detectors 202 .

[0062] In one embodiment, there is a gap between every two adjacent sub-detectors 202 .

[0063] Both the sub-detector 202 and the dental film detector 201 can be small detectors. Furthermore, the dental film detector 201 is placed in the oral cavity during use; at least two sub-detectors 202 are spaced at a predetermined distance from each other. Compared to a conventional detector with a large imaging area, this arrangement not only reduces the acquisition of redundant data but also reduces detector costs, thereby reducing the cost of the imaging device.

[0064] In one embodiment, as shown in FIG2 , a structural diagram of another imaging device is provided. The imaging device further includes: a first rotating axis 400, and a first rotating arm 401 and a second rotating arm 402 disposed on the first rotating axis 400. The distributed light source 100 is disposed on the first rotating arm 401, and each sub-detector 202 is disposed on the second rotating arm 402. The controller 300 is further configured to control the movement of the distributed light source 100 and each sub-detector 202 relative to the first rotating axis 400. During the movement of the distributed light source 100 and each sub-detector 202, each sub-detector 202 is controlled to obtain target projection data formed by each ray irradiating the target object, and perform data processing on the target projection data to obtain a target detection image. The target detection image includes at least one of a CT image, a panoramic image, and a lateral cranial image.

[0065] Optionally, the imaging device further includes a supporting structure, which includes a supporting base plate 501 and a supporting column 502, wherein the supporting base plate 501 is connected to the supporting column 502, and the first rotating shaft 400 is disposed on the supporting column 502. In addition, a fixing bracket 503 is also disposed on the supporting base plate 501, and the fixing bracket 503 is used to fix the target object. In addition, the first rotating shaft 400 includes a connecting structure and a rotating structure, wherein the rotating structure is disposed on the supporting column 502, the connecting structure is disposed on the rotating structure, and the first rotating arm 401 and the second rotating arm 402 are disposed on the connecting structure, and the first rotating arm 401 and the second rotating arm 402 are disposed at both ends of the connecting structure, so that the distributed light source 100 disposed on the first rotating arm and the sub-detectors 202 disposed on the second rotating arm 402 are face to face.

[0066] Optionally, the relative positions of the distributed light source 100, the detector 200 and the target object are first calibrated using laser or other means, and then the positions of the distributed light source 100 and the detector 200 are adjusted using the controller 300 so that the rays emitted by the distributed light source 100 can irradiate the target object, and after irradiating the target object, the rays passing through the target object can irradiate the detector 200.

[0067] The controller 300 is then used to control the distributed light source 100 and each sub-detector 202 to move about the first rotation axis 400. During the movement of the distributed light source 100 and each sub-detector 202, at least two target points of the distributed light source 100 are controlled to sequentially emit radiation toward the target object in a preset order, and then each sub-detector 202 is controlled to obtain target projection data formed by each radiation irradiating the target object. Furthermore, in one possible implementation, the controller 300 can reconstruct the target projection data to obtain a CT image. In another possible implementation, the controller 300 can perform image processing such as splicing and deep learning on the target projection data to obtain a panoramic image or a lateral cranial image.

[0068] Of course, different movement methods can produce different images, as follows.

[0069] In one embodiment, the controller 300 is specifically configured to control the first rotating arm 401 and the second rotating arm 402 to rotate about the first rotating axis 400 by a first preset angle, thereby driving the movement of the distributed light source 100 and each sub-detector 202. During the movement of the distributed light source 100 and each sub-detector 202, the controller 300 controls each sub-detector 202 to acquire target projection data formed by each radiation irradiating the target object, and processes the target projection data to obtain a CT image and / or a panoramic image.

[0070] Optionally, as shown in FIG3 , a light path diagram is provided during CT imaging and panoramic photography. The controller 300 controls the distributed light source 100 and each sub-detector 202 to rotate around the target object by a first preset angle, which can be counterclockwise or clockwise. During the process of the distributed light source 100 and each sub-detector 202 rotating around the target object, the controller 300 can control at least two targets of the distributed light source 100 to emit rays to the target object in a preset order after each rotation by a fourth preset angle (the fourth preset angle is less than the first preset angle and less than 360°), and then control each sub-detector 202 to obtain target projection data formed by each ray irradiating the target object. Furthermore, in one possible implementation, the controller 300 can reconstruct all target projection data obtained after rotating the first preset angle to obtain a CT image of the target object. In another possible implementation, the controller 300 can stitch all target projection data obtained after rotating the first preset angle and perform image processing such as deep learning to obtain a panoramic image of the target object.

[0071] In one embodiment, as shown in FIG4 and FIG5 , a structural diagram of a first rotating arm and a structural diagram of a second rotating arm are provided, respectively. A first slide rail 301 is provided on the first rotating arm 401, and a second slide rail 302 is provided on the second rotating arm 402. The distributed light source 100 is provided on the first slide rail 301, and each sub-detector 202 is provided on the second slide rail 302 through a second rotation axis 303. The controller 300 is also used to: control each sub-detector 202 to rotate around the second rotation axis 303 by a second preset angle; control the distributed light source 100 along the first slide rail 301 and each sub-detector 202 along the second slide rail 302 to move in the same direction. During the movement of the distributed light source 100 and each sub-detector 202, each sub-detector 202 is controlled to obtain target projection data formed by each ray irradiating the target object, and perform data processing on the target projection data to obtain a lateral image of the skull.

[0072] Optionally, as shown in FIG6 , a front view of a distributed detector is provided. The controller 300 controls each sub-detector 202 to rotate 90° around the second rotation axis 303 so that the long side of each sub-detector 202 is perpendicular to the ground, so that the sum of the heights of all detectors 202 is greater than the height of the head. The distributed light source 100 and each sub-detector 202 are then controlled to move synchronously in the same direction and in parallel by a first preset distance. During the process of the distributed light source 100 and each sub-detector 201 moving synchronously in the same direction and in parallel, after each movement of a second preset distance (the second preset distance is less than the first preset distance), at least two target points of the distributed light source 100 are controlled to emit rays to the target object in sequence according to a preset order, and then each sub-detector 202 is controlled to obtain target projection data formed by each ray irradiating the target object. Finally, all target projection data obtained after moving the first preset distance are spliced ​​and subjected to image processing such as deep learning to obtain a lateral image of the skull.

[0073] In one embodiment, each sub-detector 202 is disposed on a second rotating arm 402 via a second rotating axis 303 (i.e., a second slide rail 302 is not required). The controller 300 is further configured to: control each sub-detector 202 to rotate about the second rotating axis 303 by a second preset angle; and control the first rotating arm 401 and the second rotating arm 402 to rotate about the first rotating axis 400 by a third preset angle to drive the movement of the distributed light source 100 and each sub-detector 202. During the movement of the distributed light source 100 and each sub-detector 202, each sub-detector 202 is controlled to acquire target projection data formed by each ray irradiating the target object, and to perform data processing on the target projection data to obtain a lateral cephalogram image.

[0074] Optionally, the controller 300 controls each sub-detector 202 to rotate 90° about the second rotation axis 303, such that the long side of each sub-detector 202 is perpendicular to the ground, so that the sum of the heights of all detectors 202 is greater than the height of the skull. If the left side of the patient's face is required, the first rotating arm 401 and the second rotating arm 402 are controlled to rotate about the first rotation axis 400 by a third preset angle, such that the first rotating arm 401 is located near the left side of the patient's face. The distributed light source 100 and each sub-detector 202 are then controlled to synchronously move in the same direction and in parallel by a first preset distance. During the process of synchronously moving the distributed light source 100 and each sub-detector 201 in the same direction and in parallel, after each movement of the second preset distance (the second preset distance is less than the first preset distance), at least two target points of the distributed light source 100 are controlled to sequentially emit radiation toward the target object in a preset order. The sub-detectors 202 are then controlled to obtain target projection data formed by each radiation irradiating the target object. Finally, all target projection data obtained after moving the first preset distance are spliced ​​and subjected to image processing such as deep learning to obtain a lateral skull image.

[0075] It should be understood that the above embodiment of the present application uses the second preset angle of 90° as an example. Of course, the second preset angle can also be other angles, as long as the sum of the heights of all detectors 202 is greater than the height of the head. This is not limited to the embodiment of the present application.

[0076] In one embodiment, the controller 300 is specifically used to: control the dental film detector 201 to obtain target projection data formed by each ray irradiating the target object, and perform data processing on the target projection data to obtain a dental tomography image and / or a dental film image.

[0077] Optionally, as shown in FIG7 , a light path diagram for dental film photography and dental tomography is provided. A dental film detector 201 is placed on one side of a target object, i.e., one side of a tooth in a patient's mouth. A controller 300 controls at least two target points of a distributed light source 100 to sequentially emit radiation toward the target object in a predetermined sequence. The dental film detector 201 is then controlled to acquire target projection data formed by each radiation incident on the target object, and the target projection data is reconstructed to obtain a dental tomographic image.

[0078] The controller 300 is used to control a target point of the distributed light source 100 to emit rays to the target object, or at least two target points to emit rays to the target object in sequence according to a preset order, and then the dental film detector 201 is controlled to obtain the target projection data formed by each ray irradiating the target object, and the target projection data is subjected to image processing such as splicing and deep learning to obtain a dental film image.

[0079] In this embodiment, the imaging device utilizes a single distributed light source and dental radiograph detector to achieve both dental tomography and dental radiographing, thereby achieving multifunctionality without incurring additional hardware costs. Furthermore, the light source used for CT imaging, panoramic photography, cephalography, dental radiographing, and dental tomography is the same distributed light source 100, resulting in a highly efficient use of the distributed light source in this application.

[0080] In one embodiment, as shown in Figure 8, a structural diagram of a distributed light source is provided. A plurality of target points are arranged at intervals along a preset direction.

[0081] Optionally, the multiple target points in the distributed light source 100 are arranged in sequence at preset distances along the vertical direction.

[0082] It should be noted that the distance between target points, the distance between sub-detectors, and the width and height of sub-detectors should be designed to ensure that the rays can cover the target object while minimizing unnecessary redundant rays to reduce the cost of sub-detectors.

[0083] In addition, the advantages of the present application compared with existing dental imaging equipment are described below in the form of examples.

[0084] Figure 9 shows a light path diagram of rays emitted by a distributed light source. The distributed light source is an X-ray tube with eight target points and a height of 200 mm. The distributed detector includes two sub-detectors, each 20 mm high and 130 mm wide, separated by 60 mm. The distance between the distributed light source and the distributed detector is 600 mm, and the center of the target object is 200 mm from the distributed detector. As a result, the rays emitted by the distributed light source can cover an area of ​​the target object with a height of 100 mm and a width of 160 mm.

[0085] Figure 10 shows a light path diagram of a sub-detector being illuminated by radiation. Compared to the sub-detector in Figure 9, this sub-detector is rotated 90° and can acquire projection data for half of the target object. Therefore, the method of acquiring projection data for the target object by rotating the sub-detector 90° is referred to as a half-detector scanning mode.

[0086] As shown in Figures 11 and 12, an optical path diagram for multi-target lateral cephalography and an optical path diagram for single-target lateral cephalography are provided. It can be seen that after the two sub-detectors are rotated 90°, the sum of their heights is 260mm, and the multi-target distributed light source can cover a height of 240mm for cephalography. However, if a single-target light source is used, and the distance between the head and the detector is 200mm, in order to achieve 240mm coverage of the head, the single-target light source needs to be 1200mm away from the detector, and the detector needs to be 288mm high. Therefore, the use of a multi-target distributed light source can not only reduce the footprint of the imaging equipment, but also reduce the area of ​​the detector, thereby reducing the cost of the detector.

[0087] Based on the same inventive concept, embodiments of the present application also provide an imaging method for implementing the aforementioned imaging device. The solution provided by this imaging method is similar to the solution described in the aforementioned imaging device. Therefore, the specific limitations in one or more of the following imaging method embodiments can be found in the above-described limitations on the imaging device and will not be further elaborated here.

[0088] In one embodiment, as shown in FIG13 , a flow chart of an imaging method is provided. The imaging method is applied to any of the above-mentioned imaging devices and includes the following steps 101 to 103 .

[0089] Step 101: Control at least two target points of a distributed light source in an imaging device to emit rays toward a target object.

[0090] Step 102 : Control the detector in the imaging device to obtain target projection data formed by each ray irradiating the target object.

[0091] Step 103: Process the target projection data to obtain a target detection image.

[0092] In one embodiment, controlling at least two target points of a distributed light source in the imaging device to emit rays toward the target object includes: controlling at least two target points of the distributed light source to emit rays toward the target object in sequence according to a preset order.

[0093] In one embodiment, the detector includes: a distributed detector and / or a dental film detector, wherein the distributed detector includes at least two sub-detectors.

[0094] In one embodiment, there is a gap between every two adjacent sub-detectors.

[0095] In one embodiment, the imaging device further includes: a first rotation axis, and a first rotation arm and a second rotation arm disposed on the first rotation axis, wherein the distributed light source is disposed on the first rotation arm, and the sub-detectors are disposed on the second rotation arm. The imaging method further includes: controlling the distributed light source and the sub-detectors to move relative to the first rotation axis.

[0096] Correspondingly, the detector in the imaging device is controlled to obtain target projection data formed by each ray irradiating the target object, and the target projection data is processed to obtain a target detection image, including: during the movement of the distributed light source and each sub-detector, each sub-detector is controlled to obtain target projection data formed by each ray irradiating the target object, and the target projection data is processed to obtain a target detection image, wherein the target detection image includes at least one of the following: a CT image, a panoramic image, and a lateral skull image.

[0097] In one embodiment, controlling the movement of the distributed light source and each sub-detector relative to a first rotation axis includes controlling a first rotating arm and a second rotating arm to rotate about the first rotation axis by a first predetermined angle to drive the movement of the distributed light source and each sub-detector. The target detection image includes a CT image and / or a panoramic image.

[0098] In one embodiment, a first slide rail is provided on the first rotating arm, and a second slide rail is provided on the second rotating arm. The distributed light source is provided on the first slide rail, and each sub-detector is provided on the second slide rail via a second rotation axis. The imaging method further includes: controlling each sub-detector to rotate around the second rotation axis by a second preset angle;

[0099] Correspondingly, controlling the distributed light source and each sub-detector to move relative to the first rotation axis includes controlling the distributed light source to move along the first slide rail and each sub-detector to move along the second slide rail in the same direction. The target detection image includes a lateral skull image.

[0100] In one embodiment, each sub-detector is respectively disposed on a second rotating arm via a second rotating axis, and the imaging method further comprises: controlling each sub-detector to rotate around the second rotating axis by a second preset angle.

[0101] Correspondingly, controlling the movement of the distributed light source and each sub-detector relative to the first rotation axis includes: controlling the first rotating arm and the second rotating arm to rotate about the first rotation axis by a third preset angle to drive the movement of the distributed light source and each sub-detector. The target detection image includes a lateral skull image.

[0102] In one embodiment, the detector in the imaging device is controlled to obtain target projection data formed by each ray irradiating the target object, and the target projection data is processed to obtain a target detection image, including: controlling the dental film detector to obtain target projection data formed by each ray irradiating the target object, and the target projection data is processed to obtain a dental tomography image and / or a dental film image.

[0103] In one embodiment, the plurality of target points are spaced apart along a predetermined direction.

[0104] The imaging method provided in the embodiment of the present application can be applied to the technical solution in the above-mentioned imaging device embodiment of the present application. Its implementation principle and technical effects are similar and will not be repeated here.

[0105] Based on the same inventive concept, embodiments of the present application further provide an imaging device for implementing the aforementioned imaging device. The solution provided by this imaging device is similar to the solution described in the aforementioned imaging device. Therefore, the specific limitations in one or more of the following imaging device embodiments can be found in the above-described limitations on the imaging device and are not further elaborated here.

[0106] In one embodiment, as shown in FIG14 , a structural block diagram of an imaging device is provided. The imaging device 600 is applied to any of the above-mentioned imaging devices. The imaging device 600 includes a first control module 601, a second control module 602, and a processing module 603, wherein:

[0107] The first control module 601 is configured to control at least two target points of a distributed light source in the imaging device to emit rays toward a target object.

[0108] The second control module 602 is used to control the detector in the imaging device to obtain target projection data formed by each ray irradiating the target object.

[0109] The processing module 603 is used to process the target projection data to obtain a target detection image.

[0110] The imaging device provided in the embodiment of the present application can be used to execute the technical solution in the above-mentioned imaging method embodiment of the present application. Its implementation principle and technical effects are similar and will not be repeated here.

[0111] Each module in the imaging device 600 may be implemented in whole or in part through software, hardware, or a combination thereof. Each module may be embedded in or independent of a processor in a computer device in the form of hardware, or may be stored in a memory in the computer device in the form of software, so that the processor can call and execute the corresponding operations of each module.

[0112] In one embodiment, a non-volatile computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the technical solution in the above-mentioned imaging method embodiment is implemented. The implementation principle and technical effect are similar and will not be repeated here.

[0113] In one embodiment, a computer program product is provided, including a computer program. When the computer program is executed by a processor, the technical solution in the above-mentioned imaging method embodiment is implemented. Its implementation principle and technical effect are similar and will not be repeated here.

[0114] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory may include random access memory (RAM) or external cache memory, etc. For purposes of illustration and not limitation, RAM may be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The processors involved in the various embodiments provided herein may be general-purpose processors, central processing units (CPUs), graphics processors (GPUs), digital signal processors (DSPs), programmable logic devices (PLDs), data processing logic devices based on quantum computing, and the like, without limitation thereto.

[0115] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0116] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0117] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0118] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present application shall be determined by the appended claims.

Claims

1. An imaging device, characterized in that: include: Distributed light sources, detectors and controllers; wherein: The distributed light source includes a plurality of target points; The controller is connected to the distributed light source and the detector respectively, and is used to control at least two target points of the distributed light source to emit rays to a target object; The detector is used to obtain target projection data formed by each of the rays irradiating the target object; The controller is also used to process the target projection data to obtain a target detection image.

2. The imaging device according to claim 1, characterized in that The controller is used to control at least two target points of the distributed light source to emit rays to a target object, specifically to: At least two target points of the distributed light source are controlled to emit rays toward the target object in sequence according to a preset order.

3. The imaging device according to claim 1 or 2, characterized in that: The detector comprises: at least one of a distributed detector and a dental film detector, wherein the distributed detector comprises at least two sub-detectors.

4. The imaging device according to claim 3, characterized in that There is a gap between every two adjacent sub-detectors.

5. The imaging device according to claim 3 or 4, further comprising: A first rotating shaft, and a first rotating arm and a second rotating arm arranged on the first rotating shaft, wherein: The distributed light source is arranged on the first rotating arm, and each of the sub-detectors is arranged on the second rotating arm; The controller is also used to: control the distributed light source and each of the sub-detectors to move relative to the first rotation axis; during the movement of the distributed light source and each of the sub-detectors, control each of the sub-detectors to obtain the target projection data formed by each of the rays irradiating the target object, and perform data processing on the target projection data to obtain the target detection image.

6. The imaging device according to claim 5, characterized in that The controller is specifically used for: Controlling the first rotating arm and the second rotating arm to rotate around the first rotating axis by a first preset angle to drive the distributed light source and each of the sub-detectors to move; During the movement of the distributed light source and each of the sub-detectors, each of the sub-detectors is controlled to obtain the target projection data formed by each of the rays irradiating the target object, and the target projection data is processed to obtain at least one of a CT image and a panoramic image.

7. The imaging device according to claim 5 or 6, characterized in that: The first rotating arm is provided with a first slide rail, and the second rotating arm is provided with a second slide rail; The distributed light source is arranged on the first slide rail, and each of the sub-detectors is arranged on the second slide rail via a second rotation axis; The controller is also used for: Controlling each of the sub-detectors to rotate around the second rotation axis by a second preset angle; Controlling the distributed light source to move along the first slide rail and each of the sub-detectors to move along the second slide rail in the same direction; During the movement of the distributed light source and each of the sub-detectors, each of the sub-detectors is controlled to obtain the target projection data formed by each of the rays irradiating the target object, and the target projection data is processed to obtain a lateral skull image.

8. The imaging device according to claim 5, characterized in that: Each of the sub-detectors is respectively arranged on the second rotating arm through a second rotating axis; The controller is also used for: Controlling each of the sub-detectors to rotate around the second rotation axis by a second preset angle; Controlling the first rotating arm and the second rotating arm to rotate around the first rotating axis by a third preset angle to drive the distributed light source and each of the sub-detectors to move; During the movement of the distributed light source and each of the sub-detectors, each of the sub-detectors is controlled to obtain the target projection data formed by each of the rays irradiating the target object, and the target projection data is processed to obtain a lateral skull image.

9. The imaging device according to claim 3 or 4, characterized in that: The controller is specifically used for: The dental film detector is controlled to acquire target projection data formed by each of the rays irradiating the target object, and the target projection data is processed to obtain at least one of a dental tomography image and a dental film image.

10. The imaging device according to any one of claims 1, 2, 4-9, characterized in that: The multiple target points are arranged at intervals along a preset direction.

11. An imaging method, characterized in that: The imaging method is applied to the imaging device according to any one of claims 1 to 10, and the method comprises: Controlling at least two target points of the distributed light source in the imaging device to emit rays toward the target object; Controlling the detector in the imaging device to acquire the target projection data formed by each of the rays irradiating the target object; The target projection data is processed to obtain the target detection image.

12. The imaging method according to claim 11, characterized in that: The controlling the at least two target points of the distributed light source in the imaging device to emit rays toward the target object includes: controlling the at least two target points of the distributed light source to emit rays toward the target object in sequence according to a preset order.

13. An imaging device, characterized in that: The imaging device is applied to the imaging apparatus according to any one of claims 1 to 10, and the imaging device comprises: A first control module, used for controlling at least two target points of the distributed light source in the imaging device to emit rays toward the target object; A second control module, used for controlling the detector in the imaging device to acquire the target projection data formed by each of the rays irradiating the target object; A processing module is used to process the target projection data to obtain the target detection image.

14. A non-volatile computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the processor implements the steps of the method according to claim 11.

15. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the processor implements the steps of the method according to claim 11.

Images