Image registration body surface marker for tumor radiotherapy

Abstract

The utility model provides an image registration body surface mark for tumor radiotherapy. The image registration body surface mark comprises a registration strip, a contrast agent and a bonding piece. The registration strip is a flexible part and is provided with a top face and a bottom face, the outer contour of the top face is in a circular arc shape, and the registration strip is provided with a containing cavity. The contrast agent is arranged in the containing cavity, and the bonding piece is arranged on the bottom face and used for being bonded to the body surface of a patient. A patient adheres to the body surface through the adhesive part according to the tumor position, then CT and nuclear magnetism are conducted, the bottom face of the plane cannot sink into the skin, radiotherapy measurement is prevented from being affected, the mark can serve as a mark for fusion registration of a CT image and a nuclear magnetism image due to the fact that the mark is developed at the same time in CT and nuclear magnetism, the registration accuracy is improved, and the radiotherapy accuracy is improved. The CT and nuclear magnetic registration mark for tumor radiotherapy is provided for tumors (such as body surface tumors) far away from bones and involving soft tissues, and the image matching accuracy is improved, so that the radiotherapy accuracy is improved, the curative effect is improved, and the side effects are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tumor radiotherapy auxiliary equipment, in particular to an image registration body surface marker for tumor radiotherapy. Background Art

[0002] Radiation therapy is a common cancer treatment that uses high-energy radiation, such as X-rays or proton beams, to kill or damage tumor cells. This treatment can be used as a single treatment or in combination with other treatments, such as surgery and chemotherapy. The principle of radiation therapy is to use radiation energy to damage the DNA of tumor cells, making them unable to continue to grow and divide. This can control or reduce the size of the tumor, reduce symptoms, prolong the patient's survival time, and improve the quality of life.

[0003] Some cancer patients need to add MRI positioning in addition to CT positioning during radiotherapy. MRI positioning has higher soft tissue resolution, which can greatly make up for the shortcomings of poor soft tissue resolution of CT positioning. However, since radiotherapy target area delineation is performed on CT images, only by accurately fusing MRI images and CT images together can the target area delineation be better guided.

[0004] At present, the radiotherapy planning system can realize the fusion of CT images and MRI images, but this fusion is based on information such as bone markers or soft tissue density for image matching. Commonly used bone or soft tissue information is not suitable for image fusion matching in some tumor patients. When the tumor is far away from the bone, if the bone is used as a reference for image fusion, the deformation of the soft tissue may cause the CT and MRI tumor tissue images to not completely match; if the soft tissue is used as a reference for image fusion, it is difficult to ensure the accuracy of image fusion due to the low soft tissue resolution of CT itself. In addition, the long bones of the limbs are relatively regular long strips of bones. When aligning images, due to the small changes between the upper and lower layers of the image, it is easy to produce inaccurate matching. Summary of the invention

[0005] The utility model provides an image registration body surface marker for tumor radiotherapy, which is used to solve the above technical problems.

[0006] A body surface marker for image registration for tumor radiotherapy, comprising: a registration bar, which is a flexible member and is provided with a top surface and a bottom surface, wherein the top surface has an arc-shaped outer contour, and the registration bar is provided with a receiving cavity; a contrast agent, which is arranged in the receiving cavity; and an adhesive, which is arranged on the bottom surface and is used to be bonded to the patient's body surface.

[0007] Preferably, the length of the registration strip is 1 cm to 20 cm.

[0008] Preferably, the registration strip is a soft medical plastic part.

[0009] Preferably, the bottom surface is a plane.

[0010] Preferably, along the length direction of the registration strip, a ruler line is provided on the outer side of the registration strip.

[0011] Preferably, the contrast agent is any one of fat, iodine, barium, and copper sulfate.

[0012] Preferably, the adhesive component is provided with an adhesive layer and a release layer, the adhesive layer is bonded to the bottom surface, and the release layer is bonded to a side surface of the bottom surface facing away from the adhesive layer.

[0013] Preferably, the top surface is provided with a perfusion hole, and the perfusion hole is communicated with the accommodating cavity.

[0014] Preferably, there are more than two perfusion holes, and the more than two perfusion holes are arranged at intervals along the top surface.

[0015] Preferably, the registration strip is further provided with hole plugs, the number of the hole plugs is more than two and they are arranged in one-to-one correspondence with the perfusion holes, and the hole plugs are sealed and matched with the perfusion holes.

[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the written description and the drawings.

[0017] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 The figure is a schematic diagram of the overall structure of the image registration body surface markers for tumor radiotherapy described in one embodiment of the utility model.

[0020] Figure 2 It is a schematic diagram of the cross-sectional structure of the image registration body surface markers for tumor radiotherapy described in one embodiment of the utility model.

[0021] In the figure: 100, body surface marker for image registration for tumor radiotherapy; 110, registration strip; 111, top surface; 112, bottom surface; 113, accommodating cavity; 114, scale line; 115, perfusion hole; 116, hole plug; 120, adhesive; 121, adhesive layer; 122, release layer. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0023] In addition, in the present utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present utility model. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0024] The present utility model embodiment provides a body surface marker 100 for image registration for tumor radiotherapy, such as Figure 1 and Figure 2 As shown, the image registration body surface marker 100 for tumor radiotherapy includes: a registration bar 110, a contrast agent (not shown in the figure) and an adhesive 120. The registration bar 110 is a flexible member, and the registration bar 110 is provided with a top surface 111 and a bottom surface 112, the top surface 111 is an arc-shaped outer contour, and the registration bar 110 is provided with a receiving cavity 113. The contrast agent is arranged in the receiving cavity 113, and the adhesive 120 is arranged on the bottom surface 112, and the adhesive 120 is used to be bonded to the patient's body surface.

[0025] The working principle and beneficial effects of the above technical solution are as follows: In clinical radiotherapy, it is necessary to fuse MRI images and CT images to determine the tumor range and guide the delineation of the radiotherapy target area. The fusion registration of MRI images and CT images is mainly achieved through the overlap of bone markers. In clinical work, CT usually scans a larger range, while MRI only scans a smaller range around the lesion. Therefore, when using radiotherapy planning software for automatic matching, due to the similarity of the shapes of bone markers (for example: adjacent segments of the spine, long bones of the limbs) and the lack of bone structure (surface tumors), it is easy to cause inaccurate matching of CT images and MRI images. Therefore, adding markers (similar to bones) that can be simultaneously displayed on CT and MRI on the surface of the body near the tumor is conducive to improving the matching accuracy of the images. The image registration body surface marker 100 for tumor radiotherapy is pasted on the body surface by the adhesive 120 according to the tumor location of the patient, and then CT and MRI are performed respectively. The flat bottom surface 112 will not sink into the skin to avoid affecting the radiotherapy dosage. The flexible registration strip 110 can be bent arbitrarily to change the shape of the marker. On the one hand, it is easy to attach to the uneven human body surface, and on the other hand, the bendable strip can increase the matching accuracy. Since the marker is developed simultaneously in CT and MRI, it can be used as a marker for fusion registration of CT images and MRI images, improving the accuracy of registration, and providing a tumor radiotherapy CT and MRI registration marker for tumors far away from bones and involving soft tissues (such as surface tumors), which is conducive to improving the accuracy of image matching, thereby improving the accuracy of radiotherapy, improving the efficacy, and reducing side effects.

[0026] In other embodiments, the registration bar 110 may have other shapes.

[0027] In one embodiment, the length of the registration strip 110 is 1 cm to 20 cm.

[0028] The working principle and beneficial effects of the above technical solution are: using different lengths according to different usage scenarios is conducive to improving matching accuracy.

[0029] In one embodiment, see Figure 1 and Figure 2 The registration bar 110 is a soft medical plastic part.

[0030] The working principle and beneficial effects of the above technical solution are: convenient disinfection and cleaning, safe and non-toxic, and the flexible plastic can better fit the skin.

[0031] In one embodiment, see Figure 2 , the bottom surface 112 is a plane.

[0032] The working principle and beneficial effects of the above technical solution are as follows: in this way, the bonding stability of the adhesive 120 can be ensured, and the flat bottom surface 112 will not sink into the skin, thereby avoiding affecting the radiotherapy dosage.

[0033] In one embodiment, a ruler line 114 is disposed on the outer side of the registration strip 110 along the length direction of the registration strip 110 .

[0034] The working principle and beneficial effects of the above technical solution are: the positioning effect can be further improved by the ruler line 114, and the marking length can be accurately displayed by the ruler, thereby improving the accuracy of radiotherapy and improving the efficacy.

[0035] Optionally, the contrast agent is any one or more of fat, iodine, barium, and copper sulfate. Specifically in this embodiment, the contrast agent is a mixture of iodine contrast agent and copper sulfate.

[0036] The working principle and beneficial effects of the above technical solution are as follows: iodine contrast agents are used in clinical CT scanning, and iodine contrast agents have poor nuclear magnetic resonance imaging. Copper sulfate can be clearly visualized on nuclear magnetic resonance images, but copper sulfate has poor CT imaging. Mixing the two will not cause any reaction, and can also be clearly visualized on both images, which is beneficial to image matching.

[0037] In one embodiment, the adhesive member 120 includes an adhesive layer 121 and a release layer 122 . The adhesive layer 121 is bonded to the bottom surface 112 , and the release layer 122 is bonded to a side of the bottom surface 112 facing away from the adhesive layer 121 .

[0038] The working principle and beneficial effects of the above technical solution are: easy to use and able to ensure viscosity.

[0039] In one embodiment, see Figure 1 and Figure 2 The top surface 111 is provided with a filling hole 115 , and the filling hole 115 is communicated with the accommodating cavity 113 .

[0040] The working principle and beneficial effects of the above technical solution are: facilitating the replenishment and replacement of contrast agents and improving ease of use.

[0041] In one embodiment, see Figure 1 There are more than two injection holes 115 , and the more than two injection holes 115 are arranged at intervals along the top surface 111 .

[0042] The working principle and beneficial effects of the above technical solution are: improving the convenience of perfusion and avoiding damage to the registration strip 110 due to increased pressure.

[0043] In one embodiment, see Figure 1 and Figure 2 The registration strip 110 is also provided with hole plugs 116 . There are two or more hole plugs 116 , which are arranged in one-to-one correspondence with the perfusion holes 115 , and the hole plugs 116 are sealed and matched with the perfusion holes 115 .

[0044] The working principle and beneficial effects of the above technical solution are as follows: blocking the perfusion hole 115 by the hole plug 116 is helpful to improve the sealing performance and prevent leakage of contrast agent.

[0045] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. An image registration body surface marker (100) for tumor radiotherapy, characterized in that: The image registration body surface marker (100) for tumor radiotherapy comprises: A registration bar (110), the registration bar (110) is a flexible member, and the registration bar (110) is provided with a top surface (111) and a bottom surface (112), the outer contour of the top surface (111) is arc-shaped, and the registration bar (110) is provided with a receiving cavity (113); along the length direction of the registration bar (110), the outer side of the registration bar (110) is provided with a scale line (114); the top surface (111) is provided with a perfusion hole (115), and the perfusion hole (115) is connected to the receiving cavity (113); A contrast agent, the contrast agent being disposed in the containing cavity (113); and An adhesive component (120), wherein the adhesive component (120) is arranged on the bottom surface (112), and the adhesive component (120) is used for bonding to the patient's body surface.

2. The image registration body surface marker (100) for tumor radiotherapy according to claim 1, characterized in that: The length of the registration strip (110) is 1 cm to 20 cm.

3. The image registration body surface marker (100) for tumor radiotherapy according to claim 1, characterized in that: The registration strip (110) is a soft medical plastic part.

4. The image registration body surface marker (100) for tumor radiotherapy according to claim 1, characterized in that: The bottom surface (112) is a plane.

5. The image registration body surface marker (100) for tumor radiotherapy according to claim 1, characterized in that: The contrast agent is any one of fat, iodine, copper sulfate and barium.

6. The image registration body surface marker (100) for tumor radiotherapy according to claim 1, characterized in that: The adhesive component (120) is provided with an adhesive layer (121) and a release layer (122); the adhesive layer (121) is bonded to the bottom surface (112); and the release layer (122) is bonded to a side surface of the bottom surface (112) that is away from the adhesive layer (121).

7. The image registration body surface marker (100) for tumor radiotherapy according to claim 1, characterized in that: There are more than two injection holes (115), and the more than two injection holes (115) are arranged at intervals along the top surface (111).

8. The image registration body surface marker (100) for tumor radiotherapy according to claim 7, characterized in that: The alignment strip (110) is further provided with hole plugs (116). The number of the hole plugs (116) is more than two and they are arranged in a one-to-one correspondence with the injection holes (115), and the hole plugs (116) are sealed and matched with the injection holes (115).

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