Energy spectrum filtering device and application system with same

Abstract

The utility model discloses an energy spectrum filtering device and an application system with the same, the energy spectrum filtering device comprises a shell and at least one adjusting plate, the shell and the adjusting plate jointly define at least one accommodating cavity, and the adjusting plate can move along a first direction to adjust the width of the accommodating cavity in the first direction; the at least one fluid is used for filling the corresponding accommodating cavity, and the thickness of the fluid in the first direction is changed along with the change of the width of the accommodating cavity in the first direction; the driving device is used for driving the adjusting plate to move in the first direction. According to the energy spectrum filtering device provided by the embodiment of the utility model, the fluid thickness can be continuously adjusted by utilizing the flowability of the fluid, and the ray energy spectrum generated by the ray source can be continuously and effectively regulated and controlled by utilizing the different absorption degrees of the fluids with different densities and different thicknesses to the energy spectrum; therefore, the invalid ray dose is reduced to the maximum extent, the imaging contrast is improved, and component resolution detection of an object is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy spectrum filtering, and particularly relates to an energy spectrum filtering device and an application system having the same. Background Art

[0002] The application of energy spectrum filters is relatively extensive. For example, it is applied in X-ray imaging systems. As Figure 1 shown, the rays generated by the X-ray tube are a continuous spectrum with characteristic peaks. The function of the energy spectrum filter is to filter the continuous energy spectrum of X-rays generated by the X-ray source according to the imaging requirements of the object, and reduce the interference or radiation damage caused by ineffective rays during use. For objects with different densities and sizes, only X-rays in a certain energy range are valuable for imaging or are beneficial to improving imaging contrast. X-rays with too low energy cannot carry density distribution information to reach the detector. However, this part of the ray dose is very large and will be absorbed by the object. Therefore, it is hoped to reduce this part of the dose as much as possible to reduce the radiation damage to patients; for X-rays with too high energy, due to the low absorption ratio in the object, the signal differences formed by the absorption of different densities and thicknesses are small, resulting in low imaging contrast and unclear contrast, which is not conducive to comparing lesions or defects. To achieve better imaging effects, people usually adopt three methods: adjusting the ray energy and current; using an energy filtering layer to absorb low-energy rays in advance; using a detector with energy resolution ability to mainly detect effective rays.

[0003] The method of using a filter can play a role in filtering out low-energy ineffective rays in advance. However, the materials and structures of the currently used filters or filter devices are relatively fixed and cannot meet the requirements of intelligent energy spectrum adaptation guided by vision algorithms.

[0004] The patent "Energy Spectrum Modulation Device, Method and Equipment for Identifying Materials and Image Processing Method" (CN101074937B) discloses using the superposition of blades made of two materials with high Z and low Z to filter the initial rays, thereby realizing two different energy spectrum rays. This method is beneficial to improving imaging contrast and realizing composition identification. However, due to the limited types and structural combinations of materials in this method, generally the thickness of the materials is fixed, and the most accurate energy spectrum optimization and dose filtering cannot be achieved, and the requirements for low-dose imaging and high-contrast precision imaging with increasing demands cannot be met. Therefore, developing a simple and reliable method and ray filter that can achieve continuously adjustable energy spectrum filtering is an urgent problem we need to solve currently. Summary of the Invention

[0005] The purpose of the embodiments of the utility model is to provide an energy spectrum filtering device and an application system having the same, so as to solve the problem that it is difficult to achieve multi-stage adjustment and continuous adjustment in the existing energy spectrum filtering device.

[0006] According to an embodiment of the first aspect of the present utility model, an energy spectrum filtering device is provided, including:

[0007] A housing and at least one adjusting plate, the housing and the adjusting plate jointly defining at least one accommodating cavity, and the adjusting plate being movable along a first direction to adjust the width of the accommodating cavity in the first direction;

[0008] At least one fluid for filling the corresponding accommodating cavity, the thickness of the fluid in the first direction changing with the change of the width of the accommodating cavity in the first direction;

[0009] A driving device for driving the adjusting plate to move along the first direction.

[0010] Further, it includes one adjusting plate;

[0011] The accommodating cavity includes a first accommodating cavity and a second accommodating cavity, and the adjusting plate is arranged between the first accommodating cavity and the second accommodating cavity to adjust the widths of the first accommodating cavity and the second accommodating cavity in the first direction;

[0012] The fluid includes a first fluid and a second fluid with different densities, the first fluid filling the first accommodating cavity and the second fluid filling the second accommodating cavity.

[0013] Further, it includes two adjusting plates;

[0014] The accommodating cavity includes a first accommodating cavity and a second accommodating cavity, one adjusting plate and the housing defining the first accommodating cavity, and one adjusting plate and the housing defining the second accommodating cavity;

[0015] The fluid includes a first fluid and a second fluid with different densities, the first fluid filling the first accommodating cavity and the second fluid filling the second accommodating cavity.

[0016] Further, two ends of the adjusting plate are respectively connected to corresponding two ends of the housing through a flexible member or an elastic member.

[0017] Further, the driving device includes:

[0018] A hydraulic control module respectively connected to the first accommodating cavity and the second accommodating cavity, the hydraulic control module driving the adjusting plate to move along the first direction by controlling the volumes of the first fluid and the second fluid.

[0019] Further, the driving device further includes:

[0020] A servo motor connected to the adjusting plate for driving the adjusting plate to move along the first direction.

[0021] Furthermore, the first fluid is a liquid metal; and / or,

[0022] the second fluid is air, water or oil.

[0023] Furthermore, the regulating plate is formed as an organic material diaphragm.

[0024] The energy spectrum filtering device application system according to the second aspect embodiment of the present invention includes the energy spectrum filtering device described in the above embodiment.

[0025] Furthermore, the energy spectrum filtering device application system includes:

[0026] A ray source for emitting rays;

[0027] A detector for detecting the rays;

[0028] The energy spectrum filtering device is arranged between the ray source and the detector for filtering part of the rays.

[0029] The energy spectrum filtering device according to the embodiment of the present invention can continuously adjust the thickness of the fluid by utilizing the fluidity of the fluid, and at the same time, by utilizing the different absorption degrees of the energy spectrum by fluids with different densities and different thicknesses, it can continuously and effectively regulate the energy spectrum of the rays generated by the ray source, thereby minimizing the ineffective ray dose, improving the imaging contrast, and realizing the component resolution detection of the object. Description of the Drawings

[0030] Figure 1 It is the energy spectrum distribution diagram of the rays generated by the X-ray tube;

[0031] Figure 2 It is a structural schematic diagram of the energy spectrum filtering device application system according to the embodiment of the present invention;

[0032] Figure 3 It is another structural schematic diagram of the energy spectrum filtering device application system according to the embodiment of the present invention;

[0033] Figure 4 It is still another structural schematic diagram of the energy spectrum filtering device application system according to the embodiment of the present invention.

[0034] Reference Signs

[0035] Energy spectrum filtering device 100; housing 10; regulating plate 20; first fluid 30; second fluid 40; hydraulic control module 51; servo motor 52; elastic member 60;

[0036] Ray source 200; detector 300; object 400. Detailed Embodiments

[0037] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0038] The terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects and are not used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model can be implemented in an order other than those illustrated or described herein. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally indicates an "or" relationship between the associated objects before and after.

[0039] The following will be combined with Figures 1 to 4 , and the energy spectrum filtering device 100 provided by the embodiments of the present utility model will be described in detail through specific embodiments and their application scenarios.

[0040] The energy spectrum filtering device 100 according to the embodiments of the present utility model includes a housing 10, at least one adjusting plate 20, at least one kind of fluid, and a driving device.

[0041] Specifically, the housing 10 and the adjusting plate 20 jointly define at least one accommodation cavity. The adjusting plate 20 can move along a first direction to adjust the width of the accommodation cavity in the first direction. At least one kind of fluid is used to fill the corresponding accommodation cavity, and the thickness of the fluid in the first direction changes with the change of the width of the accommodation cavity in the first direction. The driving device is used to drive the adjusting plate 20 to move along the first direction.

[0042] That is to say, the adjusting plate 20 and the housing 10 can define one or more accommodation cavities. The driving device can be a driving device such as a motor. The driving device is used to drive the adjusting plate 20 to move along the first direction to change the width of the accommodation cavity. Among them, as Figure 2 shown, the first direction can be the direction from one direction where the X-ray source 200 is located to the direction where the object 40 is located, or the direction from the direction where the object 40 is located to the direction where the X-ray source 200 is located. As the adjusting plate 20 moves, the width of each accommodation cavity in the first direction changes. Since the fluid densities in each accommodation cavity are different and each layer of fluid fills the corresponding accommodation cavity, when the width of the accommodation cavity changes, the corresponding fluid thickness will also change accordingly. The absorption degree of the ray by the fluid is related to both the density of the fluid and the thickness of the fluid. Therefore, by adjusting the thickness of different fluids or a single fluid, the energy spectrum filtering device 100 can realize continuous adjustment of the energy spectrum.

[0043] Further, the fluid can be either a liquid or a gas. Compared with solids, fluids have strong fluidity and are more likely to achieve energy spectrum adjustment with a wider range and higher precision. In addition, the energy spectrum filtering range of the energy spectrum filtering device can be changed by replacing the fluid in the accommodation chamber, without the need to disassemble and reassemble the entire energy spectrum filtering device to replace the filtering component. Compared with the existing solid energy spectrum filtering structure, the energy spectrum filtering device according to the embodiment of the present invention has a more flexible usage method and a wider usage range.

[0044] Thus, for the energy spectrum filtering device 100 according to the embodiment of the present invention, the continuous adjustment of the fluid thickness can be achieved by utilizing the fluidity of the fluid. At the same time, by using fluids with different densities and thicknesses and different absorption degrees of the energy spectrum, the continuous and effective regulation of the energy spectrum of the rays generated by the ray source 200 can be realized, thereby minimizing the ineffective ray dose, improving the imaging contrast, and achieving the component resolution detection of the object.

[0045] Preferably, there is one adjusting plate 20, and the accommodation chamber includes a first accommodation chamber and a second accommodation chamber. The adjusting plate 20 is arranged between the first accommodation chamber and the second accommodation chamber and is shared by the two accommodation chambers to simultaneously adjust the widths of the first accommodation chamber and the second accommodation chamber in the first direction; the fluid includes a first fluid 30 and a second fluid 40 with different densities. The first fluid 30 fills the first accommodation chamber, and the second fluid 40 fills the second accommodation chamber.

[0046] That is to say, for the energy spectrum filtering device 100 composed of two fluids, one fluid can be a low-density fluid, and the other fluid can be a high-density fluid. A seal is maintained between each layer of fluid. According to different requirements, the thicknesses of the two fluids can be adjusted within a certain range to meet the energy spectrum filtering requirements.

[0047] Optionally, as Figure 4 shown, there can also be two adjusting plates 20. One adjusting plate 20 and the housing 10 define the first accommodation chamber, and the other adjusting plate 20 and the housing 10 define the second accommodation chamber. The width of each accommodation chamber can be adjusted independently, so that the thickness of the corresponding fluid in the accommodation chamber can be adjusted independently. The change in the thickness of the first fluid 30 does not depend on the change in the thickness of the second fluid 40, and more combinations of the first fluid 30 and the second fluid 40 with different thicknesses are realized. Thus, the energy spectrum filtering device 100 has a wider adjustment range.

[0048] According to an embodiment of the present invention, in an X-ray energy spectrum imaging system, the energy spectrum filtering device 100 is located between the ray source 200 and the detector 300, and the object 400 to be detected (for example, a person) is located between the energy spectrum filtering device 100 and the detector 300, as Figure 2As shown, a standard thickness group (high-density fluid thickness d1, low-density fluid thickness d2) of the energy spectrum filtering device 100 in the imaging system is set according to the standard model of the human body, and is adjusted according to parameters such as the body type and age of the person to be detected. If the body type is larger, d1 is larger. Thus, more low-energy rays are filtered, and the dose of low-energy rays is reduced. Preferably, curves of thickness values can be set according to parameters of different body types, such as height, weight, three-dimensional data, etc., for rapid setting of the energy spectrum filtering device 100. At the same time, the tube voltage of the radiation source 200 is adjusted in coordination to meet the rich requirements for ray energy spectrum regulation for imaging of different ages, different body types, and different parts, thereby reducing the ineffective radiation dose.

[0049] Optionally, as Figure 2 shown, both ends of the adjusting plate 20 are respectively connected to the corresponding ends of the housing 10 through elastic members 60. When the driving device applies a force to the adjusting plate 20, the adjusting plate 20 can move. When the driving device does not apply a force to the adjusting plate 20, the adjusting plate 20 can return to the set position, playing a function of automatic reset.

[0050] Optionally, both ends of the adjusting plate 20 are respectively connected to the corresponding ends of the housing 10 through flexible members, so as to facilitate the adjusting plate 20 to move to the set position under the drive of the driving device.

[0051] According to an embodiment of the present invention, as Figure 2 shown, when there is one adjusting plate 20, the driving device is a hydraulic control module 51. The hydraulic control module 51 is respectively connected to the first accommodation cavity and the second accommodation cavity. The hydraulic control module 51 drives the adjusting plate 20 to move in the first direction by controlling the volumes of the first fluid 30 and the second fluid 40.

[0052] Optionally, as Figure 4 shown, when there are two adjusting plates 20, the driving device can also be a hydraulic control module 51. The hydraulic control module 51 adjusts the thicknesses of different chambers respectively.

[0053] According to another embodiment of the present invention, as Figure 3 shown, the driving device can also be a servo motor 52. The servo motor 52 is connected to the adjusting plate 20 to drive the adjusting plate 20 to move in the first direction.

[0054] Further, the two ends of the adjusting plate 20 can also be separately moved by the servo motor 52, so that the volumes of the first accommodating cavity and the second accommodating cavity remain unchanged, but the first accommodating cavity and the second accommodating cavity are changed from parallel accommodating cavities to two non-parallel accommodating cavities, thereby changing the thickness distribution of the first fluid 30 and the second fluid 40. In other words, when the radiation source 200 is a line source, the adjusting plate 20 does not have to move in a parallel manner along the vertical direction, but can also move in a non-equilibrium manner. By this method, the thicknesses of the first fluid 30 and the second fluid 40 are adjusted, which is applicable to the adjustment of line source energy spectrum filtering.

[0055] Further, the first fluid 30 is a liquid metal. Optionally, the second fluid 40 is air, water, oil, or the like.

[0056] Specifically, the first fluid 30 can adopt a high-density fluid, such as gallium-based liquid metal, and the second fluid 40 can adopt a low-density fluid, such as water or high-pressure gas.

[0057] Further, the adjusting plate 20 between the two fluids can be a film structure and made of a light material with a low atomic number, such as an organic material, so as to reduce the absorption of rays by the partition and reduce the influence of the partition on energy spectrum regulation.

[0058] The energy spectrum filtering device application system according to the second aspect embodiment of the present invention includes the energy spectrum filtering device 100 of the above embodiment.

[0059] That is to say, since materials with different densities have different absorption capabilities for neutrons, the energy spectrum filtering device 100 according to the embodiment of the present invention can also be used for continuous adjustment of neutron energy spectrum. In addition, the energy spectrum filtering device 100 according to the embodiment of the present invention can be used in fields such as medical imaging, industrial non-destructive testing, or industrial CT.

[0060] Further, the energy spectrum filtering device application system includes a radiation source 200 and a detector 300. Among them, the radiation source 200 is used to emit rays, the detector 300 is used to detect rays, and the energy spectrum filtering device 100 is arranged between the radiation source 200 and the detector 300 to filter some rays.

[0061] Specifically, the energy spectrum filtering device application system can be an energy spectrum imaging system, such as Figure 1 As shown, the energy spectrum imaging system includes a radiation source 200, a detector 300, and the energy spectrum filtering device 100 described in the above embodiment. Specifically, the radiation source 200 is used to emit rays, the detector 300 is used to detect rays, and the energy spectrum filtering device 100 is arranged between the radiation source 200 and the detector 300 to filter some rays, so as to minimize the dose of invalid rays and achieve functions such as high-contrast precision imaging and material resolution imaging.

[0062] Other structures of the energy spectrum filtering device application system according to the embodiments of the present utility model belong to the prior art and will not be elaborated here.

[0063] The embodiments of the present utility model have been described above in conjunction with the accompanying drawings. However, the present utility model is not limited to the above specific embodiments. The above specific embodiments are merely illustrative rather than restrictive. Under the inspiration of the present utility model, those of ordinary skill in the art can also make many forms without departing from the spirit and scope protected by the claims of the present utility model, and all of them fall within the protection scope of the present utility model.

Claims

1. An energy spectrum filtering device, characterized in that: include: A housing and at least one adjustment plate, wherein the housing and the adjustment plate together define at least one accommodating cavity, and the adjustment plate can be moved along a first direction to adjust a width of the accommodating cavity in the first direction; at least one fluid, used to fill the corresponding accommodating cavity, wherein the thickness of the fluid in the first direction changes as the width of the accommodating cavity in the first direction changes; A driving device is used to drive the adjustment plate to move along the first direction.

2. The energy spectrum filtering device according to claim 1, characterized in that: comprising an adjustment plate; The accommodating cavity comprises: a first accommodating cavity and a second accommodating cavity, and the adjusting plate is arranged between the first accommodating cavity and the second accommodating cavity to adjust the width of the first accommodating cavity and the second accommodating cavity in the first direction; The fluid includes: a first fluid and a second fluid with different densities, the first fluid fills the first containing chamber, and the second fluid fills the second containing chamber.

3. The energy spectrum filtering device according to claim 1, characterized in that: comprising two said adjustment plates; The accommodating cavity comprises: a first accommodating cavity and a second accommodating cavity, one of the adjustment plates and the shell defines the first accommodating cavity, and the other of the adjustment plates and the shell defines the second accommodating cavity; The fluid includes: a first fluid and a second fluid with different densities, the first fluid fills the first containing chamber, and the second fluid fills the second containing chamber.

4. The energy spectrum filtering device according to claim 1, characterized in that: The two ends of the adjustment plate are respectively connected to the corresponding two ends of the shell through flexible parts or elastic parts.

5. The energy spectrum filtering device according to claim 2 or 3, characterized in that: The driving device comprises: A hydraulic control module is connected to the first accommodating chamber and the second accommodating chamber respectively, and the hydraulic control module drives the adjustment plate to move along the first direction by controlling the volumes of the first fluid and the second fluid.

6. The energy spectrum filtering device according to claim 2 or 3, characterized in that: The driving device further comprises: A servo motor is connected to the adjustment plate to drive the adjustment plate to move along the first direction.

7. The energy spectrum filtering device according to claim 2 or 3, characterized in that: The first fluid is liquid metal; and / or, The second fluid is air, water or oil.

8. The energy spectrum filtering device according to claim 1, characterized in that: The adjustment plate is formed as an organic material membrane.

9. An energy spectrum filtering device application system, characterized in that: The invention comprises the energy spectrum filtering device according to any one of claims 1 to 8.

10. The energy spectrum filtering device application system according to claim 9, characterized in that: include: A ray source, used for emitting rays; A detector, used for detecting the radiation; The energy spectrum filtering device is arranged between the ray source and the detector to filter part of the rays.

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