Phantom and multimodal medical imaging system having the same

Abstract

The present invention provides a phantom and a multimodal medical imaging system having the phantom, wherein the phantom includes a first hollow body component and a second hollow body component installed on the first hollow body component, wherein the first hollow body component includes a first shell and a second shell, and the second hollow body component includes a plurality of second hollow bodies, wherein the plurality of second hollow bodies are respectively installed on the first shell and the second shell, and the first shell and the second shell are detachably connected. The phantom provided by the present invention, by designing the first hollow body component as a first shell and a second shell that are detachably connected to each other, utilizes the detachable connection between the first shell and the second shell so that the phantom can be transported in parts, and at the same time, when the first shell (or the second shell) is damaged, only the damaged first shell (or the second shell) needs to be replaced, and the remaining second shell (or the first shell) can still be used normally, thereby reducing its own maintenance cost and improving its own economy.

Description

Technical Field

[0001] The present invention relates to the technical field of medical imaging, and in particular to a phantom and a multimodal medical imaging system having the phantom. Background Art

[0002] In recent decades, multimodal medical imaging equipment has received increasing attention, and a large number of studies have shown that the combined application of two or more methods can improve diagnostic efficiency. Taking PET / CT and PET / MR, the two most widely used multimodal medical imaging devices, as examples, PET / CT is a medical imaging device that organically combines PET and CT on the same device. CT provides accurate anatomical positioning of the lesion, while PET provides detailed molecular information such as the function and metabolism of the lesion, and obtains an image that integrates the anatomical structure and functional metabolism of the subject under the same conditions. It has the characteristics of sensitivity, accuracy, specificity and precise positioning. One imaging can obtain tomographic images of all directions of the whole body. PET / MR has incomparable advantages over CT in terms of functional and molecular imaging. It has multifunctional molecular imaging technologies such as diffusion weighted imaging, diffusion tensor imaging, diffusion kurtosis imaging, and magnetic resonance perfusion imaging. In particular, MR has no ionizing radiation, and the contrast agent is safer, which is particularly suitable for special populations such as children, adolescents and pregnant women.

[0003] When these multimodal medical imaging devices are performing tests, they need to achieve synchronous data acquisition and fuse the two images collected by the two medical imaging devices to facilitate the doctor's diagnosis. However, due to hardware installation errors, the image coordinate systems of the two medical imaging devices do not completely overlap, which will cause the images of the two medical imaging devices to be misaligned and reduce the clarity of the fused image.

[0004] To this end, a phantom is needed to achieve the registration between the image coordinate systems of the two medical imaging devices. Considering the accuracy of the image coordinate system center calculation, the size of the phantom is generally designed to be larger to reduce the error in the coordinate system center calculation. This makes the current phantom inconvenient to carry, and if some components of the phantom are damaged, the entire phantom will be unusable. Summary of the invention

[0005] In view of this, it is necessary to provide an improved phantom and a multimodal medical imaging system having the phantom. The phantom is more convenient to carry and has relatively low maintenance costs. The multimodal medical imaging system using the phantom has improved convenience in aligning multimodal medical imaging equipment and has broad application prospects.

[0006] The present invention provides a phantom, comprising a first hollow body component and a second hollow body component installed on the first hollow body component, the first hollow body component contains a first imaging modality substance, and the second hollow body component contains a second imaging modality substance; the first hollow body component comprises a first shell and a second shell, the second hollow body component comprises a plurality of second hollow bodies, the plurality of second hollow bodies are respectively installed on the first shell and the second shell, and the first shell and the second shell are detachably connected.

[0007] The mold provided by the present invention designs the first hollow body component as a first shell and a second shell that are detachably connected to each other, and utilizes the detachable connection between the first shell and the second shell to enable the mold to be transported in parts. At the same time, when the first shell (or the second shell) is damaged, only the damaged first shell (or the second shell) needs to be replaced, and the remaining second shell (or the first shell) can still be used normally, thereby reducing its own maintenance cost and improving its own economy.

[0008] In order to reduce the demand for the usage of the first imaging modality substance and the second imaging modality substance, a first filling port is opened on the first shell body, and a first filling buckle is provided on the first filling port, and the first filling buckle can detachably seal the first filling buckle; and a second filling port is opened on the second shell body, and a second filling buckle is provided on the second filling port, and the second filling buckle can detachably seal the second filling buckle.

[0009] With such arrangement, the phantom reduces the amount of the first imaging modality substance and the second imaging modality substance required by the phantom, and the phantom is more economical.

[0010] In order to facilitate the installation of the first pouring buckle and the second pouring buckle, the first pouring buckle is threadedly matched with the inner wall of the first pouring port; and / or,

[0011] The second pouring buckle is threadably matched with the inner wall of the second pouring port.

[0012] With such arrangement, the first pouring buckle and the second pouring buckle can be more conveniently installed on the first pouring buckle and the second pouring port.

[0013] In order to improve economic efficiency, a first boss is provided between the first filling buckle and the first shell, a first connecting hole connected to the first filling port is provided inside the first boss, and the first filling port is threadedly engaged with the inner wall of the first connecting hole; and / or,

[0014] A second boss is provided between the second filling buckle and the second shell, a second connecting hole connected to the second filling port is provided inside the second boss, and the second filling port is threadedly engaged with the inner wall of the second connecting hole.

[0015] In this way, the first boss and the second boss can serve as wear-bearing elements of the first pouring buckle and the second pouring buckle. When the first boss and the second boss fail due to wear due to long-term twisting of the first pouring buckle and the second pouring buckle, the mold body does not need to replace the first shell or the second shell, but only the first boss or the second boss needs to be replaced.

[0016] In order to facilitate the installation and use of the phantom on the examination bed, the first perfusion buckle and the second perfusion buckle are both multiple in number, and the first shell and the second shell can be assembled into a box-shaped structure, and the first perfusion buckle and the second perfusion buckle are not provided on at least one side of the box-shaped structure.

[0017] With such arrangement, the phantom can be conveniently and stably placed on the examination bed of the multimodal medical imaging device.

[0018] In order to improve the convenience of assembly and disassembly between the first shell and the second shell, the first shell and the second shell are fixed to each other through a snap connection or a threaded connection.

[0019] With such an arrangement, the installation convenience between the first shell and the second shell is improved.

[0020] In order to reduce the number of shots required for using the phantom, each of the second hollow bodies includes a hollow portion, the number of the second hollow bodies is at least four, and the hollow portions of the four second hollow bodies are arranged in skew surfaces.

[0021] With such a configuration, when the phantom is registered, only one shot is required to realize the three-dimensional transformation of the entire image coordinate system, thereby avoiding the problem of multiple shots caused by setting the number of the second hollow bodies to three.

[0022] In order to improve the accuracy of registration, the hollow portion of the second hollow body is spherical; and / or,

[0023] Two of the four second hollow bodies are installed on the first shell, and the other two are installed on the second shell.

[0024] With such arrangement, the accuracy of calculating the geometric center of the hollow part is improved, and the registration accuracy of the phantom is improved; the distribution distance between the second hollow body components is wider, which is conducive to improving the calculation accuracy.

[0025] In order to improve the convenience of assembling the first hollow body component, the first hollow body component also includes a third shell, and the first shell, the second shell and the third shell are stacked in sequence, and the adjacent first shell and the second shell, and the second shell and the third shell can be detachably connected.

[0026] With such arrangement, the three hollow bodies in the first hollow body assembly are stacked in a layered manner, the arrangement is more reasonable, and the disassembly and installation are also more convenient.

[0027] The present invention also provides a multimodal medical imaging system, comprising a multimodal medical imaging device and a phantom adapted for the multimodal medical imaging device, wherein the phantom is any one of the phantoms described above.

[0028] The multimodal medical imaging system provided by the present invention reduces its own maintenance cost by adopting the above-mentioned phantom, and improves the competitiveness of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the three-dimensional structure of a phantom at a first viewing angle in one embodiment of the present invention;

[0030] Figure 2 for Figure 1 The schematic diagram of the three-dimensional structure of the phantom at a second viewing angle;

[0031] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the phantom shown in the third perspective;

[0032] Figure 4 for Figure 1 A three-dimensional disassembly diagram of the phantom shown;

[0033] Figure 5 for Figure 1 The schematic diagram of the three-dimensional structure of the phantom shown in the fourth viewing angle after omitting some structures;

[0034] Figure 6 for Figure 2 The three-dimensional structure diagram of the model shown is after omitting some structures.

[0035] Main component symbols

[0036]

[0037]

[0038] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly mounted on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0042] See also Figures 1 to 4 , Figure 1 FIG. 1 is a schematic diagram of a three-dimensional structure of a phantom 100 at a first viewing angle in one embodiment of the present invention. Figure 2 for Figure 1 The schematic diagram of the three-dimensional structure of the phantom 100 at the second viewing angle is shown. Figure 3 for Figure 1 The schematic diagram of the three-dimensional structure of the phantom 100 at the third viewing angle is shown. Figure 4 for Figure 1 The schematic diagram of the three-dimensional disassembly of the phantom 100 is shown.

[0043] The phantom 100 is applied in a multimodal medical imaging system, and is used to realize the coincidence registration of the image coordinate systems between two medical imaging devices. The phantom 100 has different development states on different medical imaging devices, so the phantom 100 can calibrate the image coordinate system of the corresponding medical imaging device through its own different development images, thereby knowing the image conversion relationship between the two medical imaging devices, and then realizing the image registration of the multimodal medical imaging device, and ensuring the image accuracy of the multimodal medical imaging device.

[0044] In this embodiment, the phantom 100 is applied to a PET / MR device.

[0045] Positron emission tomography (PET) is a relatively advanced clinical imaging technology in the field of nuclear medicine. It is a substance that is generally necessary for biological metabolism, such as glucose, protein, nucleic acid, fatty acid, labeled with a short-lived radionuclide (such as 18F, 11C, etc.), and injected into the human body. The radionuclide releases positrons during the decay process. After traveling a few tenths of a millimeter to a few millimeters, a positron encounters an electron and annihilates, thereby generating a pair of photons with an energy of 511KeV in opposite directions. This pair of photons is captured by a highly sensitive camera and corrected by a computer for scattering and random information. After performing the same analysis and processing on different positrons, we can obtain a three-dimensional image of the aggregation situation in the body, thereby achieving the purpose of diagnosis.

[0046] Magnetic resonance imaging (MR) is to place the human body in a special magnetic field and use radio frequency pulses to stimulate the hydrogen nuclei in the human body, causing the hydrogen nuclei to resonate and absorb energy. After the radio frequency pulses are stopped, the hydrogen nuclei emit radio signals at a specific frequency and release the absorbed energy, which is collected by the receiver outside the body and processed by a computer to obtain an image. This is called magnetic resonance imaging. Magnetic resonance imaging completely gets rid of the damage to the human body caused by ionizing radiation. It has many parameters, a large amount of information, can be imaged in all directions, and has high resolution for soft tissues. It is widely used in the diagnosis of clinical diseases and has become an indispensable examination method for some lesions.

[0047] When used, the phantom 100 will be placed on the scanning bed of the PET / MR device, and the PET / MR device will be started to scan the phantom 100 to generate PET images and MR images respectively. Among them, the PET image is an image generated by the nuclear imaging device scanning the material imaged by the second imaging modality; the MR image is an image generated by the magnetic resonance device scanning the material imaged by the first imaging modality. According to the PET / MR image registration phantom 100, the corresponding positional relationship between the imaging parts of the PET image and the MR image can be known. Therefore, the PET image and the MR image can be registered through at least three non-coplanar pixel points to obtain the correction coordinate transformation, thereby achieving the purpose of calibrating the PET image and the MR image.

[0048] It is understandable that in other embodiments, the phantom 100 can also be applied to PET / CT or other multi-modal medical imaging equipment.

[0049] Specifically, the phantom 100 includes a first hollow body component 10 and a second hollow body component 20 installed on the first hollow body component 10 . The first hollow body component 10 contains a first imaging modality substance, and the second hollow body component 20 contains a second imaging modality substance.

[0050] In this embodiment, the first imaging modality substance is an enhancement solution that is imaged in an MR device but not in a PET device; the second imaging modality substance is a radionuclide drug that is imaged in a PET device but not in an MR device.

[0051] The phantom 100 obtains the positional relationship between the two images based on the image shooting results of the phantom 100 under different devices, and obtains the relationship of coordinate system transformation, thereby achieving the purpose of calibrating the PET image and the MR image.

[0052] In this embodiment, the first imaging modality substance is a solvent containing hydrogen atoms (such as F18), and the second imaging modality substance is a nickel sulfate solution. It is understood that in other embodiments, the first imaging modality substance may also use other radionuclide solvents such as 11C; and the second imaging modality substance may also use other enhancement solutions besides the nickel sulfate solution.

[0053] Considering the accuracy of calculating the center of the image coordinate system, the existing phantoms are generally designed to be larger in size, which makes the current phantoms inconvenient to carry and not economical to replace after damage.

[0054] In order to improve the convenience during transportation and handling and reduce the maintenance cost of the mold 100 provided by the present invention, the first hollow body component 10 is designed to be a first shell 11 and a second shell 12 that are detachably connected to each other. The detachable connection between the first shell 11 and the second shell 12 enables the mold 100 to be transported in parts. At the same time, when the first shell 11 (or the second shell 12) is damaged, it is only necessary to replace the damaged first shell 11 (or the second shell 12), and the remaining second shell 12 (or the first shell 11) can still be used normally.

[0055] Specifically, the first hollow body assembly 10 includes at least two first hollow bodies, namely a first shell 11 and a second shell 12; some of the second hollow bodies 21 among the multiple second hollow bodies 21 are installed in the first shell 11, and the remaining second hollow bodies 21 are installed in the second shell 12; that is, the multiple second hollow bodies 21 are respectively installed in the first shell 11 and the second shell 12.

[0056] In this embodiment, considering that the snap connection is more convenient for assembly and disassembly, the first shell 11 and the second shell 12 are fixed to each other by a snap connection. It can be understood that in other embodiments, the first shell 11 and the second shell 12 can also be fixed to each other by other detachable connection methods such as threaded connection.

[0057] It should be noted that both the first shell 11 and the second shell 12 adopt a hollow plate structure, that is, the first imaging modality material and the second imaging modality material are respectively accommodated inside the hollow plates of the first shell 11 and the second shell 12; in this way, both the first shell 11 and the second shell 12 need to be filled with imaging modality material in the hollow interlayer of the plate, which reduces the demand for imaging modality material and reduces cost.

[0058] It is understandable that if the actual demand for the imaging modality material is not considered, the first shell 11 and the second shell 12 can also be directly filled with the imaging modality material in the entire cavity surrounded by each plate.

[0059] In this embodiment, the first shell 11 and the second shell 12 are two rectangular parallelepipeds of the same size. The first shell 11 and the second shell 12 are connected to each other and can be assembled into a larger box-shaped structure.

[0060] It is understandable that in other embodiments, the first shell 11 and the second shell 12 may also adopt other shapes besides a rectangular parallelepiped, such as a cylinder or an irregular geometric body, as long as the shapes of the first shell 11 and the second shell 12 do not affect the image registration function of the phantom 100 .

[0061] The mold body 100 provided by the present invention designs the first hollow body component 10 into a first shell 11 and a second shell 12 that are detachably connected to each other, and utilizes the detachable connection between the first shell 11 and the second shell 12 to enable the mold body 100 to be transported in parts. At the same time, when the first shell 11 (or the second shell 12) is damaged, only the damaged first shell 11 (or the second shell 12) needs to be replaced, and the remaining second shell 12 (or the first shell 11) can still be used normally, thereby reducing its own maintenance cost and improving its own economy.

[0062] In one embodiment of the present invention, at least one first filling port 111 is provided on the first shell 11 , and a first filling buckle 112 is provided on the first filling port 111 . The first filling buckle 112 is detachably connected to the first filling port 111 and can seal the first filling port 111 .

[0063] Meanwhile, at least one second filling port 121 is provided on the second shell 12 , and a second filling buckle 122 is provided on the second filling port 121 . The second filling buckle 122 is detachably connected to the second filling port 121 and can seal the second filling port 121 .

[0064] In this embodiment, the number of the first pouring buckle 112 and the second pouring buckle 122 are both multiple, and the multiple first pouring buckles 112 and the second pouring buckles 122 are correspondingly distributed on multiple sides of the first shell 11 and the second shell 12. It can be understood that in other embodiments, the number of the first pouring buckle 112 and the second pouring buckle 122 can also be set to one.

[0065] In this embodiment, the first pouring buckle 112 is threadedly matched with the inner wall surface of the first pouring port 111, and the first pouring buckle 112 seals the first pouring port 111 by threadingly matching with the inner wall surface of the first pouring port 111; and / or,

[0066] The second pouring buckle 122 is threadedly matched with the inner wall surface of the second pouring port 121 , and the second pouring buckle 122 seals the second pouring port 121 by threadedly matching with the inner wall surface of the second pouring port 121 .

[0067] It is understandable that in other embodiments, other soft sealing and hard sealing methods may be used between the first filling buckle 112 and the first filling port 111 , and between the second filling buckle 122 and the second filling port 121 .

[0068] In one embodiment of the present invention, a first boss 113 is further provided between the first pouring buckle 112 and the first shell 11, and a first connecting hole 114 communicating with the first pouring port 111 is provided inside the first boss 113; at this time, the first pouring buckle 112 is threadedly engaged with the inner wall of the first connecting hole 114; and / or,

[0069] A second boss 123 is provided between the second filling buckle 122 and the second shell 12 , and a second connecting hole 124 communicating with the second filling port 121 is provided inside the second boss 123 ; at this time, the second filling buckle 122 and the inner wall of the second connecting hole 124 are threadedly matched.

[0070] In this embodiment, the first boss 113 and the first shell 11 can be connected in a split manner, and the first boss 113 can be installed on the first shell 11 by gluing, snapping, etc.; at the same time, the second boss 123 and the second shell 12 can also be connected in a split manner, and the second boss 123 can be installed on the second shell 12 by gluing, snapping, etc.

[0071] In this way, the first boss 113 and the second boss 123 can serve as wear-bearing elements of the first pouring buckle 112 and the second pouring buckle 122. When the first boss 113 and the second boss 123 wear out and fail due to long-term twisting of the first pouring buckle 112 and the second pouring buckle 122, the mold body 100 does not need to replace the first shell 11 or the second shell 12, but only needs to replace the first boss 113 or the second boss 123.

[0072] In one embodiment of the present invention, the number of the first perfusion buckle 112 and the number of the second perfusion buckle 122 are both multiple, and the multiple first perfusion buckles 112 and the multiple second perfusion buckles 122 are correspondingly distributed on multiple sides of the first shell 11 and the second shell 12; and in the box structure formed by splicing the first shell 11 and the second shell 12, the first perfusion buckle 112 and the second perfusion buckle 122 are not provided on at least one side of the box structure.

[0073] In the present embodiment, in the box structure formed by the first shell 11 and the second shell 12, the first perfusion buckle 112 and the second perfusion buckle 122 are not provided on the two side surfaces thereof; at this time, the box structure can be placed on the examination bed of the multimodal medical imaging equipment with the two sides where the first perfusion buckle 112 and the second perfusion buckle 122 are not provided.

[0074] It is understandable that the box structure may also be provided with only one side or more sides to provide a vacancy for the first perfusion buckle 112 and the second perfusion buckle 122 , so that the phantom 100 can be placed on the examination bed of the multimodal medical imaging device in a relatively stable posture.

[0075] With such configuration, the phantom 100 can be conveniently and stably placed on the examination bed of the multimodal medical imaging device.

[0076] In one embodiment of the present invention, there are multiple second hollow bodies 21 , and each second hollow body 21 includes a hollow portion 211 and a mounting portion 212 . The hollow portion 211 is mounted on the first hollow body assembly 10 via the mounting portion 212 .

[0077] In this embodiment, the mounting portion 212 is shaft-shaped, and the hollow portion 211 extends into the corresponding first filling port 111 or second filling port 121 through the shaft-shaped mounting portion 212 to achieve the installation of the second hollow body 21 on the first hollow body assembly 10.

[0078] Considering the convenience of detection, the number of the second hollow bodies 21 is set to at least four, and the hollow portions 211 of the four second hollow bodies 21 are arranged in skew surfaces.

[0079] With such arrangement, when the phantom 100 is registered, only one shot is required to realize the three-dimensional transformation of the entire image coordinate system, thereby avoiding the problem of multiple shots caused by setting the number of the second hollow bodies 21 to three.

[0080] Please also read Figure 5 to Figure 6 , Figure 5 for Figure 1 The schematic diagram of the three-dimensional structure of the phantom 100 with some structures omitted at a fourth viewing angle is shown. Figure 6 for Figure 2 The schematic diagram of the three-dimensional structure of the phantom 100 is shown with some structures omitted.

[0081] Furthermore, the hollow portion 211 is spherical.

[0082] With such configuration, the accuracy of calculating the geometric center of the hollow portion 211 is improved, and the registration accuracy of the phantom 100 is improved.

[0083] Further, at least two of the at least four second hollow bodies 21 are disposed on the first shell 11 , and the remaining at least two second hollow bodies 21 are disposed on the second shell 12 .

[0084] With such arrangement, the distribution distance between the second hollow body components 20 is wider, which is beneficial to improving the calculation accuracy.

[0085] It can be understood that in other embodiments, the mounting portion 212 can also adopt other shapes, as long as the mounting portion 212 can achieve fixed installation of the hollow portion 211 on the first hollow body assembly 10; the hollow portion 211 can also adopt other shapes besides a spherical shape, and the distribution of at least four second hollow bodies 21 on the first shell 11 and the second shell 12 can also adopt other arrangements, for example, one second hollow body 21 is located on the first shell 11, and three second hollow bodies 21 are located on the second shell 12.

[0086] It should be noted that the second hollow body 21 can be located inside the first shell 11 or the second shell 12 as shown in the figure, or can extend out of the first shell 11 or the second shell 12 and thus be located outside the first shell 11 or the second shell 12 .

[0087] In one embodiment of the present invention, the first hollow body assembly 10 may further include a third shell (not shown), and the first shell 11, the second shell 12 and the third shell are stacked in sequence, and the adjacent first shells 11 and second shells 12, and the second shells 12 and third shells can be detachably connected.

[0088] At this time, the three hollow bodies in the first hollow body assembly 10 are stacked in a stacked manner, the arrangement is more reasonable, and the disassembly and installation are also more convenient. Of course, if the number of hollow bodies in the first hollow body assembly 10 is further increased (that is, the first hollow body assembly 10 also has a fourth shell), the fourth shell can be stacked on the third shell in a layered manner.

[0089] In one embodiment of the present invention, the mold body 100 also includes a plurality of adjustment units (not shown), each of which is arranged between the second hollow body 21 and the first shell 11 or the second shell 12, and each second hollow body 21 in the second hollow body assembly 20 is connected to the first shell 11 or the second shell 12 through a corresponding adjustment unit, and each second hollow body 21 can adjust its distance relative to the first shell 11 or the second shell 12 through a corresponding adjustment unit.

[0090] It should be noted that the adjustment unit itself can adopt a conventional structure, which can be implemented by a telescopic mechanical element, such as a hollow telescopic rod or a flexible mechanical arm; it can also be implemented by threaded cooperation between the mounting portion 212 in the second hollow body 21 and the inner wall of the first filling port 111 or the inner wall of the second filling port 121.

[0091] That is, the adjustment unit itself can be either a mechanical part or a mechanical connection structure, as long as the adjustment unit itself can achieve height adjustment of the second hollow body 21 relative to the first shell 11 or the second shell 12 .

[0092] The setting of the adjustment unit enables the second hollow body 21 to adjust its position relative to the first shell 11 or the second shell 12 through the adjustment unit, so as to reach different preset positions under different scanning states.

[0093] By obtaining the specific position of the model 100 in the annular space, the position deviation of each second hollow body 21 in different imaging devices can be calculated, and each second hollow body 21 can be set to a preset position through each adjustment unit, thereby compensating for the error in the field of view difference between the two imaging devices and further improving the accuracy of the alignment.

[0094] In order to improve the convenience during transportation and handling and reduce the maintenance cost of the mold 100 provided by the present invention, the first hollow body component 10 is designed to be a first shell 11 and a second shell 12 that are detachably connected to each other. The detachable connection between the first shell 11 and the second shell 12 enables the mold 100 to be transported in parts. At the same time, when the first shell 11 (or the second shell 12) is damaged, it is only necessary to replace the damaged first shell 11 (or the second shell 12), and the remaining second shell 12 (or the first shell 11) can still be used normally.

[0095] The present invention also provides a multimodal medical imaging system (not shown), which includes a multimodal medical imaging device (not shown) and a phantom 100 adapted to the multimodal medical imaging device. The multimodal medical imaging system provided by the present invention reduces its own maintenance cost by adopting the phantom 100, and improves the competitiveness of the whole system.

[0096] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0097] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

Claims

1. A phantom, comprising a first hollow body component (10) and a second hollow body component (20) mounted on the first hollow body component (10), wherein a first imaging modality substance is contained in the interior of the first hollow body component (10), and a second imaging modality substance is contained in the interior of the second hollow body component (20); characterized in that: The first hollow body assembly (10) comprises a first shell (11) and a second shell (12); the second hollow body assembly (20) comprises a plurality of second hollow bodies (21); the plurality of second hollow bodies (21) are respectively mounted on the first shell (11) and the second shell (12); and the first shell (11) and the second shell (12) are detachably connected; The number of the second hollow bodies (21) is set to at least four, at least two of the second hollow bodies (21) are arranged on the first shell (11), and the remaining at least two second hollow bodies (21) are arranged on the second shell (12); each of the second hollow bodies (21) comprises a hollow portion (211), and the hollow portions (211) of the at least four second hollow bodies (21) are arranged in skew surfaces; The mold body (100) further comprises a plurality of adjustment units, each of which is arranged between the second hollow body (21) and the first shell (11) or the second shell (12); each of the second hollow bodies (21) in the second hollow body assembly (20) is connected to the first shell (11) or the second shell (12) via a corresponding adjustment unit; each of the second hollow bodies (21) can adjust its distance relative to the first shell (11) or the second shell (12) via a corresponding adjustment unit.

2. The phantom according to claim 1, wherein: The first shell (11) is provided with a first filling port (111), and the first filling port (111) is provided with a first filling buckle (112), and the first filling buckle (112) can detachably seal the first filling port (111); and the second shell (12) is provided with a second filling port (121), and the second filling port (121) is provided with a second filling buckle (122), and the second filling buckle (122) can detachably seal the second filling port (121).

3. The phantom according to claim 2, wherein: The first pouring buckle (112) is threadably engaged with the inner wall of the first pouring port (111); and / or, The second pouring buckle (122) is threadably engaged with the inner wall of the second pouring port (121).

4. The phantom according to claim 2, wherein: A first boss (113) is provided between the first pouring buckle (112) and the first shell (11), a first connecting hole (114) connected to the first pouring port (111) is provided inside the first boss (113), and the first pouring buckle (112) and the inner wall of the first connecting hole (114) are threadedly engaged; and / or, A second boss (123) is provided between the second filling buckle (122) and the second shell (12); a second connecting hole (124) connected to the second filling port (121) is provided inside the second boss (123); the second filling buckle (122) is threadedly engaged with the inner wall of the second connecting hole (124).

5. The phantom according to claim 2, wherein: The number of the first pouring buckle (112) and the number of the second pouring buckle (122) are both multiple, and the first shell (11) and the second shell (12) can be assembled into a box-shaped structure, and the first pouring buckle (112) and the second pouring buckle (122) are not provided on at least one side of the box-shaped structure.

6. The phantom according to claim 1, wherein: The first shell (11) and the second shell (12) are fixed to each other via a snap connection or a threaded connection.

7. The phantom according to claim 1, wherein: The hollow portion (211) of the second hollow body (21) is spherical.

8. The phantom according to claim 1, wherein: The first hollow body assembly (10) further comprises a third shell, wherein the first shell (11), the second shell (12) and the third shell are stacked in sequence, and the adjacent first shell (11) and the second shell (12), as well as the second shell (12) and the third shell are detachably connected.

9. A multimodal medical imaging system, comprising a multimodal medical imaging device and a phantom adapted for the multimodal medical imaging device, characterized in that: The phantom is the phantom (100) according to any one of claims 1 to 8.

Images