Resolution model body and scanning equipment

Abstract

The utility model relates to a resolution ratio die body and scanning equipment, the resolution ratio die body comprises a housing and an inner core, two ends of the housing along the axial direction are respectively provided with a liquid inlet and an extraction opening; the inner core is provided with a plurality of hot stove hole sets, each hot stove hole set comprises a plurality of hot stove holes arranged at intervals, and the hot stove holes penetrate through the inner core in the axial direction of the inner core. Wherein the liquid inlet, the hot stove hole and the extraction opening are communicated to form a liquid injection channel, and liquid in the liquid injection channel flows from the liquid inlet to the extraction opening. The liquid inlet, the hot stove hole and the exhaust hole are communicated to form the liquid injection channel, and the liquid flows from the liquid inlet to the exhaust hole, so that the liquid flows in a single direction, bubbles in the liquid in the hot stove hole are expelled by suction in the liquid injection process, the defect that bubbles are easy to generate in the prior art is overcome, and the liquid injection efficiency is improved. Therefore, the accuracy of resolution evaluation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of scientific instruments, in particular to a resolution phantom and scanning equipment. Background Art

[0002] Spatial resolution has always been one of the most important performance indicators in medical imaging. Higher spatial resolution means smaller lesions can be detected. Early-stage cancer lesions are often small, so single-photon emission computed tomography (SPECT) and positron emission computed tomography (PET), with their high spatial resolution, can improve early cancer detection rates.

[0003] Phantoms with internal microstructures are widely used in such applications to calibrate and test system performance parameters. Take the Derenzo phantom as an example. This phantom is the most widely used resolution phantom in the field of nuclear medicine and is used to determine image quality. The Derenzo phantom usually includes a shell and an inner core. The inner core is arranged in the shell. During use, the radioactive solution is contained in the hot focus hole and placed in the sealed phantom. Then, image acquisition is performed, and the resolution of the image is judged based on the image. There are 6 hot focus holes with different diameters on the inner core. For the micro PET system, the diameter of the hot focus hole in the inner core of the phantom is very small, for example, 0.8, 1.0, 1.2, 1.5, 1.8, 2.0, mm. Due to the structure of the injection channel in the phantom in the prior art and the small diameter of the hot focus hole, the inner core is prone to generate bubbles due to capillary phenomena during the perfusion process, thereby affecting the test. Utility Model Content

[0004] Based on this, it is necessary to provide a high-resolution phantom and scanning equipment to address the technical problem in the prior art that bubbles are easily generated during the phantom perfusion process, which affects the test.

[0005] A resolution phantom, comprising:

[0006] The shell is respectively provided with a liquid inlet and an air extraction port at both ends along the axial direction;

[0007] The inner core is constructed with a plurality of heat stove hole groups, each of the heat stove hole groups includes a plurality of heat stove holes arranged at intervals, and the heat stove holes penetrate the inner core along the axial direction of the inner core;

[0008] Wherein, the liquid inlet, the hot stove hole and the air extraction port are connected to form a liquid injection channel.

[0009] In one embodiment, the housing comprises:

[0010] a shell, wrapped around the inner core;

[0011] A liquid suction connector is provided at one end of the housing, and is provided with a liquid inlet penetrating the liquid suction connector;

[0012] The air extraction joint is arranged at the other end of the shell, and the liquid suction joint is provided with the air extraction port which passes through the air extraction joint.

[0013] In one embodiment, the housing comprises:

[0014] The main body section is constructed as a columnar structure;

[0015] Transition sections are provided at both ends of the main section, and one end of the transition pipe away from the main section is connected to the liquid suction joint or the gas extraction joint;

[0016] The transition section is constructed in a conical shape, and the cross-sectional size of the transition section gradually decreases from the main body section toward a direction away from the main body section.

[0017] In one embodiment, the inner end surfaces of the shell at both ends along the axial direction are spaced from the two ends of the inner core to form a first interlayer space and a second interlayer space, the first interlayer space is connected to the liquid inlet, the second interlayer space is connected to the air exhaust port, and the two ends of the hot stove hole are respectively connected to the first interlayer space and the second interlayer space.

[0018] In one embodiment, the resolution phantom further comprises:

[0019] The bracket is arranged in the second interlayer space, and the two ends of the bracket are respectively supported on the ends of the inner core and the air extraction joint, and the bracket is constructed as a hollow structure.

[0020] In one embodiment, the support comprises:

[0021] Support columns;

[0022] Support ribs, wherein the plurality of support ribs are arranged at intervals in a divergent shape, the ends of the plurality of support ribs close to each other are connected to the support column, and the ends of the plurality of support ribs away from each other are supported on the end surface of the exhaust joint facing the second interlayer space, and the exhaust port is connected to the second interlayer space through the gaps between the support ribs;

[0023] The support shell is constructed with a cavity with an opening at one end and a through hole connected to the cavity. The end face where the opening of the support shell is located is supported on the inner core, and the end of the support shell away from the inner core is fixedly connected to the support column.

[0024] In one embodiment, a connecting hole is provided at the core of the inner core and passes through the inner core along the axial direction of the inner core, and the connecting hole is connected with the first interlayer space and the second interlayer space.

[0025] In one embodiment, at least one end of the inner core is tapered.

[0026] In one embodiment, the outer shell and the inner core are integrally formed by 3D printing, and the outer shell and the inner core are a whole.

[0027] In one embodiment, a limiting groove is provided on the outer peripheral surface of the shell, and the limiting groove extends along the axial direction of the shell.

[0028] A scanning device is provided, which is a nuclear medicine imaging device and comprises the resolution phantom described above.

[0029] A method for manufacturing a resolution phantom, comprising the following steps:

[0030] Acquiring a three-dimensional model of the resolution phantom;

[0031] The resolution phantom is integrally formed by 3D printing according to the three-dimensional model.

[0032] In one embodiment, the 3D printing and integrally forming of the resolution phantom according to the three-dimensional model comprises the following steps:

[0033] Light scanning is performed on the photocurable resin according to the three-dimensional model, and the photocurable resin is cured after being irradiated with light to form a resolution phantom corresponding to the three-dimensional model.

[0034] Scanning the light-curable resin with light, wherein the light-curable resin is cured after being irradiated with light to form a resolution phantom corresponding to the three-dimensional model;

[0035] The light scanning sequence is from the air extraction port end to the liquid inlet end.

[0036] A method for perfusion according to the above resolution phantom comprises the following steps:

[0037] Connect the air extraction tool to the air extraction port, and connect the liquid suction tool to the liquid inlet;

[0038] After pressing the piston of the vacuum tool toward the vacuum port to the limit position, immerse the aspiration tool below the liquid surface and pull the piston until the solution fills the resolution phantom and enters the vacuum tool.

[0039] Remove the suction tool and seal the liquid inlet;

[0040] Pull the piston away from the exhaust port;

[0041] Restore the piston to its position and push the solution in the suction tool into the resolution phantom;

[0042] After there are no bubbles in the hot stove hole, remove the vacuum tool and seal the vacuum port.

[0043] In one embodiment, the air extraction tool is a syringe barrel, and the liquid aspiration tool is a syringe needle.

[0044] Beneficial effects of the utility model:

[0045] The utility model provides a resolution phantom, wherein the outer shell is used to support and seal the inner core. By arranging a liquid inlet and an air extraction port at both ends of the outer shell, air is extracted through the air extraction port when the radioactive solution is perfused, thereby generating a negative pressure in the hot stove hole of the inner core, thereby sucking the radioactive liquid into the hot stove hole to achieve resolution evaluation. The hot stove hole is arranged to be a hole that passes through the inner core along the axial direction of the inner core to facilitate filling with the radioactive solution. In this embodiment, the liquid inlet, the hot stove hole and the air extraction port are connected to form a liquid injection channel, and the flow direction of the liquid flows from the liquid inlet to the air extraction port, so that the flow direction of the liquid is a single direction, so that during the liquid injection process, the bubbles in the liquid in the hot stove hole are driven away by suction, thereby overcoming the defect of easy generation of bubbles in the prior art, thereby improving the accuracy of the resolution evaluation. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of the external outline of a resolution phantom provided in one embodiment of the present utility model;

[0047] Figure 2 A cross-sectional view of a resolution phantom provided by an embodiment of the present invention;

[0048] Figure 3 for Figure 2 Cross-sectional view along AA;

[0049] Figure 4 A cross-sectional view of an inner core provided in one embodiment of the present utility model;

[0050] Figure 5 A cross-sectional view of a resolution phantom provided in another embodiment of the present invention.

[0051] Reference numerals:

[0052] Outer shell 100; shell body 110; main body section 111; limiting groove 1111; transition section 112; liquid suction joint 120; liquid inlet 121; exhaust joint 130; exhaust port 131; inner core 200; hot stove hole 210; connecting hole 220; first interlayer space 300; second interlayer space 400; reinforcing rib 410; bracket 500; support column 510; support rib 520; support shell 530. DETAILED DESCRIPTION

[0053] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0054] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "axial" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0055] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0056] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0057] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0058] 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.

[0059] See Figures 1 to 5 As shown, an embodiment of the present invention provides a resolution phantom, which includes an outer shell 100 and an inner core 200. The outer shell 100 is respectively provided with a liquid inlet 121 and an air exhaust port 131 at both ends along the axial direction; the inner core 200 is configured with multiple groups of hot stove hole groups, each hot stove hole group includes a plurality of hot stove holes 210 arranged at intervals, and the hot stove holes 210 pass through the inner core 200 along the axial direction of the inner core 200; wherein, the liquid inlet 121, the hot stove holes 210 and the air exhaust port 131 are connected to form a liquid injection channel.

[0060] This technology provides a resolution phantom. An outer shell 100 supports and seals an inner core 200. Liquid inlets 121 and air evacuation ports 131 are provided at both ends of the outer shell 100. When a radioactive solution is infused, air is evacuated through the air evacuation ports 131, thereby generating a negative pressure within the hot-spot aperture 210 of the inner core 200 and drawing the radioactive liquid into the hot-spot aperture 210 for resolution assessment. The hot-spot aperture 210 is configured as a hole extending axially through the inner core 200 to facilitate filling with the radioactive solution. In this embodiment, the liquid inlet 121, hot-spot aperture 210, and air evacuation port are interconnected to form an infusion channel. Liquid flows from the liquid inlet 121 to the air evacuation port 131, resulting in a single-direction liquid flow. During the infusion process, bubbles in the liquid within the hot-spot aperture 210 are removed by suction, thereby overcoming the drawback of the prior art of prone bubble generation and improving the accuracy of resolution assessment.

[0061] It will be appreciated that in this embodiment, the inner core 200 is configured with six groups of heat-cooking holes of different sizes. The heat-cooking holes 210 in each group have the same diameter. Different groups of heat-cooking holes 210 are configured with heat-cooking holes 210 of different diameters to facilitate the evaluation of different resolutions. Specifically, the heat-cooking holes 210 in each group are arranged in an equilateral triangle, dividing the entire inner core 200 into six equal areas.

[0062] In this embodiment, the liquid inlet 121 is connected to a syringe needle, and the air extraction port 131 is connected to the syringe barrel. When filling the resolution phantom with liquid, a liquid aspiration tool, such as a needle, is connected to the liquid inlet; a air extraction tool, such as a syringe, is connected to the air extraction port. The needle is then submerged below the level of the radioactive liquid, and the syringe piston is pulled to complete the filling of the resolution phantom and remove any air bubbles within the phantom.

[0063] In one embodiment, the outer shell 100 includes a shell 110, a liquid suction connector 120 and an air extraction connector 130, and the shell 110 is wrapped around the inner core 200; the liquid suction connector 120 is arranged at one end of the shell 110, and the liquid suction connector 120 is provided with a liquid inlet 121 passing through the liquid suction connector 120; the air extraction connector 130 is arranged at the other end of the shell 110, and the liquid suction connector 120 is provided with an air extraction port 131 passing through the air extraction connector 130.

[0064] The shell 110 is wrapped around the outside of the inner core 200 to protect and seal the inner core 200. The liquid suction connector 120 is used to connect to a liquid suction tool, such as a needle; the air extraction connector 130 is used to connect to an extraction tool, such as the syringe barrel of a syringe. By providing a liquid inlet 121 that passes through the liquid suction connector 120, the liquid entering from the inner hole of the needle can enter the hot stove hole 210 of the inner core 200 from the liquid inlet 121. Correspondingly, by providing an air extraction port 131 that passes through the air extraction connector 130, the air in the inner core 200 can be extracted through the syringe, thereby forming a negative pressure in the inner core 200. Preferably, both the liquid suction connector 120 and the air extraction connector 130 are Luer connectors. Specifically, the outer circumference of the liquid aspiration connector 120 is a tapered connector with a slight inclination angle, and the Luer connector of the needle is directly inserted into the liquid aspiration connector 120 to achieve the connection between the needle and the liquid aspiration connector 120. The outer circumference of the air extraction connector 130 is provided with an external thread, and correspondingly, the head of the syringe is provided with an internal thread to cooperate with the external thread on the air extraction connector 130 to achieve the connection between the syringe and the air extraction connector 130.

[0065] In this embodiment, the liquid aspiration connector 120 is set as a Luer connector corresponding to the Luer connector of the needle, and the air extraction connector 130 is set as a Luer connector corresponding to the Luer connector of the syringe, which can facilitate the connection with the needle and the syringe and ensure the air tightness of the connection.

[0066] In one embodiment, the inner end surfaces of the shell 110 at both ends along the axial direction are spaced from the two ends of the inner core 200 to form a first interlayer space 300 and a second interlayer space 400. The first interlayer space 300 is connected to the liquid inlet 121, and the second interlayer space 400 is connected to the exhaust port 131. The two ends of the hot stove hole 210 are respectively connected to the first interlayer space 300 and the second interlayer space 400.

[0067] By arranging the inner end surfaces of the shell 110 at both ends along the axial direction to be spaced apart from the ends of the inner core 200, two interlayer spaces are formed between the shell 110 and the inner core 200. The ends of all the hot stove holes 210 on the inner core 200 are respectively connected to the first interlayer space 300 and the second interlayer space 400, thereby facilitating the connection between the liquid inlet 121 and the air extraction port 131 and all the hot stove holes 210. When liquid is injected, liquid is introduced through the liquid inlet 121 and air is extracted through the air extraction port 131, thereby completing the injection of liquid into all the hot stove holes 210.

[0068] In one embodiment, the shell 110 includes a main section 111 and a transition section 112, and the main section 111 is constructed as a columnar structure; transition sections 112 are respectively provided at both ends of the main section 111, and the end of the transition section away from the main section 111 is connected to the liquid suction connector 120 or the air extraction connector 130; wherein, the transition section 112 is constructed as a cone, and the cross-sectional size of the transition section 112 gradually decreases from the main section 111 to the direction away from the main section 111.

[0069] Specifically, the main body section 111 of the housing 110 is a cylindrical structure that wraps around the outer circumference of the inner core 200. Transition sections 112 are provided at both ends of the main body section 111, and the ends of the two transition sections 112 facing away from the main body section 111 are connected to the liquid suction connector 120 and the air extraction connector 130, respectively. The transition sections 112 are primarily used to connect the main body section 111 with the liquid suction connector 120 and the air extraction connector 130. Specifically, the transition sections 112 are constructed as a tapered structure to facilitate the transition from thick to thin, and vice versa, between the housing 110 and the liquid suction connector 120 and the air extraction connector 130.

[0070] Reference Figure 5 It is understood that in some embodiments, at least one end of the inner core 200 is tapered.

[0071] In some embodiments, the end surface of the inner core 200 facing the liquid pipetting connector 120, i.e., the first interlayer space 300, is tapered, with the tip of the tapered end facing the liquid inlet 121. In this way, the first interlayer space 300 formed by the inner end surface of the transition zone and the inner end surface of the inner core 200 is a tapered interlayer space.

[0072] In some embodiments, the end surface of the inner core 200 on one side of the second interlayer space 400 is conical and concave in a direction away from the air extraction port, with the opening direction of the cone facing the air extraction port 131 .

[0073] By setting at least one end of the inner core 200 to be conical, while ensuring that the liquid inlet 121 and the air exhaust port 131 are connected to the hot stove hole 210, the interlayer space can be made relatively smaller and the volume of the inner core can be smaller. The structure is more stable and the manufacturing difficulty is lower, which is beneficial for saving solution and reducing manufacturing costs during liquid injection, thereby reducing the cost of use.

[0074] In one embodiment, the outer shell 100 and inner core 200 are integrally formed via 3D printing. In this embodiment, the outer shell 100 and inner core 200 are integrally formed via 3D printing, forming a single unit. This reduces the number of parts, thereby lowering production costs. Furthermore, it enables the integrated molding of high-resolution molds, thereby reducing processing steps, further reducing production costs and improving production efficiency. The materials of the outer shell 100 and inner core 200 are not limited and can be materials such as polyethylene and polypropylene.

[0075] To improve the efficiency of venting bubbles within the hot stove hole 210 during liquid injection, in this embodiment, the end surface of the inner core 200 facing the exhaust connector 130 is configured as a conical surface that is concave inward toward the liquid aspiration connector 120. This allows bubbles to be drawn into the concave conical space during needle aspiration, thereby facilitating their expulsion from the outer shell 100. Because the entire resolution phantom is formed using 3D printing, to enhance the structural strength of the shell 110, the end surface of the transition section 112 facing the inner core 200 is configured as a flat surface, and a through hole is provided in the transition section 112 to connect to the exhaust hole in the exhaust connector 130. This ensures exhaust efficiency while reducing the volume of the second interlayer space 400, thereby saving on the amount of radioactive solution used.

[0076] In one embodiment, the resolution phantom further includes a bracket 500, which is disposed in the second interlayer space 400. The two ends of the bracket 500 are respectively supported on the ends of the inner core 200 and the exhaust joint 130. The bracket 500 is constructed as a hollow structure to connect the exhaust port 131, the second interlayer space 400 and the hot stove hole 210.

[0077] Since the second interlayer space 400 is relatively large, a bracket 500 is provided in the second interlayer space 400, and the two ends of the bracket 500 respectively support the inner core 200 and the exhaust connector 130 to prevent the risk of collapse of the transition section 112 during the 3D printing process, thereby ensuring the molding effect. In addition, by providing the bracket 500 between the inner core 200 and the exhaust connector 130, the bracket 500 can be used to turbulently control the flow of the liquid, thereby improving the exhaust effect. On the other hand, the overall strength of the resolution mold can also be improved. The bracket 500 is constructed as a hollow structure so that the exhaust port 131, the second interlayer space 400 and the hot stove hole 210 are connected, so as to facilitate suction through a syringe to achieve gas circulation. In order to improve the structural strength of the resolution mold, a plurality of spaced reinforcing ribs 410 can be provided in the second interlayer space 400.

[0078] In one embodiment, the bracket 500 includes a support column 510, support ribs 520, and a support shell 530. The support ribs 520 are arranged in a divergent pattern at intervals. The ends of the support ribs 520 that are close to each other are connected to the support column 510, and the ends of the support ribs 520 that are away from each other are supported on the end surface of the exhaust connector 130 that faces into the second interlayer space 400. The exhaust port 131 is connected to the second interlayer space 400 through the gaps between the support ribs 520. The support shell 530 is configured with a cavity with an open end and a through hole connected to the cavity. The end surface of the support shell 530 where the opening is located is supported on the inner core 200, and the end of the support shell 530 that is away from the inner core 200 is fixedly connected to the support column 510. In some embodiments, the support ribs 520 are reinforcing ribs.

[0079] Specifically, the support column 510 is a cylindrical structure, and the number of support ribs 520 is multiple. In this embodiment, the six support ribs 520 are arranged divergently in the radial direction of the shell; they are also distributed divergently in the axial direction of the shell. Among them, during 3D printing, the air extraction joint is printed first, and the support ribs, support columns, support shells, inner cores, etc. are printed in sequence along the axial direction of the mold body. The six support ribs 520 are inclined in the direction away from the axis of the support column 510 and are connected to the end of the air extraction joint. The support shell 530 is set as a curved shell 110, and the large end face of the curved shell 110 is supported on the conical concave surface of the inner core 200. This can increase the contact area between the support shell and the inner core 200, thereby improving the support effect. By setting a through hole on the support shell 530, the spaces on both sides of the support shell 530 can be connected to each other.

[0080] In one embodiment, a connecting hole 220 is provided at the center of the inner core 200 and passes through the inner core 200 along the axial direction of the inner core 200 . The connecting hole 220 is connected to the first interlayer space 300 and the second interlayer space 400 .

[0081] Since the resolution mold body is integrally formed using 3D printing technology, a connecting hole 220 is provided at the center of the inner core 200 to facilitate the outflow of excess resin during the 3D printing process, thereby preventing excess resin from accumulating in the cavity and affecting the molding effect. In this embodiment, the connecting hole 220 is axially arranged to pass through the inner core 200. Since the connecting hole 220 is located at the center of the inner core 200, it is beneficial for gas to flow through the center during the injection process, thereby facilitating exhaust. Furthermore, the connecting hole 220 is provided as a stepped hole, and the diameter of the end close to the liquid suction connector 120 is larger than the diameter of the end close to the air extraction connector 130. In this way, the bubbles can be crushed by changing the diameter, thereby facilitating the discharge of the bubbles.

[0082] In one embodiment, a limiting groove 1111 is provided on the outer circumference of the housing 100, extending axially along the housing 100. By providing the limiting groove 1111 on the outer circumference of the housing 100, which extends axially along the housing 100, the integrity of the outer circumference of the housing 100 is destroyed. When the housing 100 is placed flat on a surface, the limiting groove 1111 prevents the housing 100 from rolling, thereby limiting the position of the entire resolution phantom. Specifically, the limiting groove 1111 is provided on the main body section 111.

[0083] One embodiment of the present invention further provides a scanning device, which is a nuclear medicine imaging device and includes the above-described resolution phantom. By applying the above-described resolution phantom to the scanning device, the liquid inlet 121, the hot stove hole 210, and the air extraction hole are connected to form an injection channel. The liquid flows from the liquid inlet 121 to the air extraction hole 131, resulting in a single direction of liquid flow. During the injection process, bubbles in the liquid within the hot stove hole 210 are removed by suction, thereby overcoming the drawback of the prior art of easily generating bubbles and improving the accuracy of resolution assessment. Specifically, the scanning device may be a PET (positron emission tomography) scanner or a SPECT (single photon emission computed tomography) scanner, etc.

[0084] Reference Figures 1 to 5 It is understood that the method of using the resolution phantom provided by the present invention is as follows:

[0085] The aspiration tool can be a syringe needle, and the degassing tool can be a syringe barrel. First, connect the prepared phantom's degassing connector 130 to the barrel, and connect the needle to the phantom's aspiration connector 120. Then, press the syringe plunger into its full depth, immerse the needle downward into the radioactive solution to be extracted, and withdraw the plunger until the solution fills the phantom and an appropriate amount enters the barrel. Remove the needle and plug the aspiration connector 120 with a plug to prevent leakage. Keeping the barrel pointed downward, pull the syringe plunger outward to create a high negative pressure within the barrel. This will cause small bubbles in the barrel to expand, rise, and enter the barrel. Return the plunger to its original position, and push the solution in the barrel into the phantom to fill the volume previously occupied by the bubbles. Repeat the degassing steps until all bubbles are eliminated. Finally, remove the phantom from the barrel and seal the degassing connector 130 with a plug.

[0086] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0087] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A resolution phantom, characterized in that The resolution phantom comprises: The housing (100) is respectively provided with a liquid inlet (121) and an air extraction port (131) at two ends along the axial direction; The inner core (200) is constructed with a plurality of heat stove hole groups, each of the heat stove hole groups includes a plurality of heat stove holes (210) arranged at intervals, and the heat stove holes (210) penetrate the inner core (200) along the axial direction of the inner core (200); The liquid inlet (121), the hot stove hole (210), and the air extraction port (131) are connected to form a liquid injection channel.

2. The resolution phantom according to claim 1, wherein The housing (100) comprises: A shell (110) wrapped around the inner core (200); A liquid suction connector (120) is provided at one end of the housing (110), and a liquid inlet (121) is provided on the liquid suction connector (120) and passes through the liquid suction connector (120); An air extraction joint (130) is provided at the other end of the housing (110), and the air extraction joint (130) is provided with the air extraction port (131) that passes through the air extraction joint (130).

3. The resolution phantom according to claim 2, wherein: The housing (110) comprises: The main body section (111) is constructed as a columnar structure; A transition section (112), wherein the transition sections (112) are respectively provided at both ends of the main section (111), and one end of the transition section facing away from the main section (111) is connected to the liquid suction joint (120) or the air extraction joint (130); The transition section (112) is constructed in a conical shape, and the cross-sectional size of the transition section (112) gradually decreases from the main section (111) in a direction away from the main section (111).

4. The resolution phantom according to claim 2, wherein: The inner end surfaces of the shell (110) at both ends along the axial direction are spaced from the two ends of the inner core (200) to form a first interlayer space (300) and a second interlayer space (400). The first interlayer space (300) is connected to the liquid inlet (121), and the second interlayer space (400) is connected to the air extraction port (131). The two ends of the hot stove hole (210) are respectively connected to the first interlayer space (300) and the second interlayer space (400).

5. The resolution phantom according to claim 4, wherein: The resolution phantom further comprises: A bracket (500), the bracket (500) is arranged in the second interlayer space (400), two ends of the bracket (500) are respectively supported on the end of the inner core (200) and the end of the air extraction joint (130), and the bracket (500) is constructed as a hollow structure.

6. The resolution phantom according to claim 5, wherein: The bracket (500) comprises: Support column (510); Support ribs (520), wherein a plurality of the support ribs (520) are arranged at intervals in a divergent shape, and ends of the plurality of support ribs (520) close to each other are connected to the support column (510), and ends of the plurality of support ribs (520) away from each other are supported on the end surface of the exhaust joint (130) facing the second interlayer space (400), and the exhaust port and the second interlayer space (400) are connected through the gaps between the support ribs (520); The support shell (530) is constructed with a cavity with an opening at one end and a through hole communicating with the cavity. The end surface of the support shell (530) where the opening is located is supported on the inner core (200). The end of the support shell (530) facing away from the inner core (200) is fixedly connected to the support column (510).

7. The resolution phantom according to claim 4, wherein: The core of the inner core (200) is provided with a communication hole (220) that passes through the inner core (200) along the axial direction of the inner core (200), and the communication hole (220) is connected to the first interlayer space (300) and the second interlayer space (400).

8. The resolution phantom according to claim 1, wherein The outer shell (100) and the inner core (200) are integrally formed by 3D printing, and the outer shell (100) and the inner core (200) are a whole.

9. The resolution phantom according to any one of claims 1 to 8, wherein: At least one end of the inner core (200) is tapered.

10. The resolution phantom according to any one of claims 1 to 9, characterized in that A limiting groove (1111) is provided on the outer peripheral surface of the housing (100), and the limiting groove (1111) extends along the axial direction of the housing (100).

11. A scanning device, characterized in that: The scanning device is a nuclear medicine imaging device, comprising the resolution phantom according to any one of claims 1-10.

Images