A kind of anti-scattered ray flexible shielding material for filtering stray light and improving imaging in interventional surgery

Abstract

The present invention provides a flexible anti-scattering ray shielding material for interventional surgery, which can filter stray light and improve imaging. The flexible anti-scattering ray shielding material includes an anti-scattering ray active component and a support body. The anti-scattering ray elements in the anti-scattering ray active component include any one or a combination of at least two of beryllium, aluminum, copper, elements numbered 57 - 71, or elements numbered 74 - 83. The total content of the anti-scattering ray elements in the flexible anti-scattering ray shielding material is 226 - 907 g / m<supgt;2< / supgt;. By strictly controlling the content of the anti-scattering ray elements per unit area and through theoretical research on interventional X-rays of different energies, different combinations of elements with different efficacies are designed. When used at the imaging site of interventional surgery, it can not only filter stray light, making the imaging clearer, but also significantly reduce the impact of radiation on patients, and has broad application prospects.

Description

Technical Field

[0001] The invention relates to the technical field of anti-scattered ray technology, and in particular to an anti-scattered ray flexible shielding material for filtering stray light and improving imaging in interventional surgery. Background Art

[0002] X / γ rays can penetrate materials of a certain thickness and can make fluorescent materials emit light, camera emulsions sensitive, gases ionize, and can also excite inner-layer electrons. They are used in medical imaging, material composition analysis, safety testing, etc., and their use occasions are becoming more and more extensive. The importance of protecting against ionizing radiation from X / γ rays in life and work is self-evident.

[0003] In interventional surgery, x-ray / gamma-ray imaging and interventional media are generally required to perform surgery on specific parts, such as heart bypass surgery. During interventional surgery, x-rays have high energy and have a certain impact on the patient's health. As interventional surgery becomes more common, research on related radiation protection facilities is also increasing.

[0004] CN211534789U discloses a radiation-proof surgical drape for patients undergoing interventional surgery, comprising a first drape, a third drape is sewn and fixed to the middle of the first drape, a second drape is sewn and fixed to the right side of the connection between the middle of the first drape and the third drape, a first zipper is installed on the upper left end of the second drape, a second zipper is installed on the lower left end of the second drape, a second puncture hole is opened above the middle of the first drape, a first puncture hole is opened below the middle of the first drape, a first covering drape is sewn and fixed above the third drape, a second covering drape is sewn and fixed below the third drape, and a lead sheet is movably installed below the second drape. The first drape is made of non-woven fabric, with a first puncture hole and a second puncture hole opened on it, and the first puncture hole and the second puncture hole are both aligned with the groin puncture site of the patient. The second drape is made of transparent plastic film, one side of the second drape is fixed to the outside of the first drape with sutures, and the upper and lower ends of the fixed side are respectively installed with the first zipper and the second zipper, and wraps around the second drape. The lead sheet has the same shape as the second drape, and the area of ​​the lead sheet is slightly smaller than the area of ​​the second drape.

[0005] However, the above-mentioned drapes can only be used in non-surgical areas, and the main scattered radiation during the operation comes from the surgical area directly irradiated by the X-ray machine.

[0006] Therefore, it is necessary to develop new anti-scattered radiation flexible shielding materials for protecting directly irradiated areas during interventional surgery. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides a flexible shielding material for preventing scattered rays for filtering stray light and improving imaging during interventional surgery. The flexible shielding material for preventing scattered rays solves the problem of excessive radiation at the irradiated part of the patient during interventional surgery, while also having the technical effect of enhancing imaging, and has broad application prospects in interventional surgery.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] In a first aspect, the present invention provides a scattered ray-proof flexible shielding material for filtering stray light and improving imaging for interventional surgery, wherein the scattered ray-proof flexible shielding material comprises an anti-scattered ray active component and a supporting body;

[0010] The anti-scattered ray element in the anti-scattered ray active component includes any one or a combination of at least two of beryllium, aluminum, copper, elements 57 to 71, or elements 74 to 83;

[0011] The total content of the anti-scattered ray elements in the anti-scattered ray flexible shielding material is 226-907 g / m 2 .

[0012] The present invention strictly controls the content per unit area of ​​the anti-scattered ray element, thereby achieving the protection of the patient's interventional area without affecting imaging. In addition, through theoretical research on interventional X-rays of different energies, different performance elements are designed for combination, and the above elements are specially selected as anti-scattered ray active components, which can reduce the occurrence of secondary fluorescence reflection and achieve better imaging effect.

[0013] That is, the functions of the anti-scattered ray flexible shielding material described in the present invention are: a. filtering out stray light in x / gamma rays that has no effect on imaging but has radiation to the human body; b. filtering out stray light reflected from the environment to the intervention site; the combination of the two achieves the effect of enhanced imaging.

[0014] The present invention can directly act on the irradiated part, and by filtering stray light, it can improve the imaging quality and the quality of interventional surgery. At the same time, it can effectively shield the scattered rays of the directly irradiated part, greatly reducing the effective annual radiation receiving dose of the interventional doctor.

[0015] It should be noted that according to the article "The Influence of Scattered Rays on the Quality of X-ray Photos" (Xu Hongxing. The Influence of Scattered Rays on the Quality of X-ray Photos [J]. Radiology Practice, 2000, 015(004): 284-285), about 99% of the photons of the original emission beam emitted from the X-ray tube are absorbed and scattered when passing through the human body, and only 1% of the photons of the original emission beam carry the X-ray image information and reach the film to form an image. Therefore, when performing X-ray photography and other X-ray diagnosis, it is very important to suppress and eliminate scattered rays. The stray light mentioned in this application refers to the scattered rays during X-ray photography or other X-ray diagnosis.

[0016] In the present invention, elements 57 to 71 may be, for example, lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium or lutetium.

[0017] In the present invention, elements 74 to 83 may be, for example, tungsten, rhenium, osmium, iridium, platinum, gold, mercury, thallium, lead or bismuth.

[0018] Preferably, the anti-scattered-ray flexible shielding material is an anti-scattered-ray flexible blanket, an anti-scattered-ray flexible towel or an anti-scattered-ray flexible cloth or the like.

[0019] The total content of the anti-scattered ray elements in the anti-scattered ray flexible shielding material of the present invention is 226-907 g / m 2 , for example, it can be 226g / m 2 , 230g / m 2 , 240g / m 2 , 300g / m 2 , 400g / m 2 , 500g / m 2 , 600g / m 2 , 700g / m 2 , 800g / m 2 , 900g / m 2 or 907g / m 2 The above values ​​are not limited to the above values, and other values ​​not listed in the above values ​​are also applicable.

[0020] Preferably, when the anti-scattered ray element in the anti-scattered ray active component is lead, the content of the anti-scattered ray element in the anti-scattered ray flexible shielding material is 300 to 907 g / m 2 , for example, it can be 300g / m 2 , 350g / m 2 , 400g / m 2 , 450g / m 2 , 500g / m 2 , 600g / m 2 , 700g / m 2, 800g / m 2 or 907g / m 2 The present invention preferably adopts a lower content for lead, which has a better imaging effect.

[0021] Preferably, when the anti-scattered ray element in the anti-scattered ray active component is any one of beryllium, aluminum, copper, elements 57 to 71, elements 74 to 81 or element 83, or a combination of at least two thereof, the content of the anti-scattered ray element in the anti-scattered ray flexible shielding material is 226 to 500 g / m 2 , for example, it can be 226g / m 2 , 300g / m 2 , 350g / m 2 , 380g / m 2 , 400g / m 2 , 430g / m 2 , 450g / m 2 or 500g / m 2 The present invention preferably adopts a higher element content for the above elements, which has a better protection effect without affecting the imaging.

[0022] Preferably, the anti-scattered radiation element includes a first element and a second element, the first element includes any one of beryllium, aluminum or copper or a combination of at least two thereof, and the second element includes any one of elements 57 to 71 or elements 74 to 83 or a combination of at least two thereof;

[0023] Preferably, the second element is any one of elements 74 to 83 or a combination of at least two of them.

[0024] Preferably, the mass ratio of the first element to the second element is 0.8 to 4:1, for example, it can be 0.8:1, 0.9:1, 1:1, 1.2:1, 1.5:1, 2:1, 2.5:1, 3:1, 3.5:1 or 4:1, but is not limited to the listed values, and other unlisted values ​​within the range are also applicable.

[0025] Preferably, the anti-scattered ray flexible shielding material filters 0-80kV X-rays, for example, it can be 0kV, 10kV, 12kV, 13kV, 14kV, 15kV, 16kV, 17kV, 18kV, 19kV, 20kV, 30kV, 40kV, 50kV, 70kV or 80kV, but it is not limited to the listed values, and other unlisted values ​​in this range are also applicable, preferably 0-40kV X-rays. The anti-scattered ray flexible shielding material of the present invention can filter 0-80kV soft X-rays.

[0026] Preferably, the scattered radiation-proof active component includes an oxide of the scattered radiation-proof element and / or a simple substance of a scattered radiation-proof metal.

[0027] Preferably, the anti-scattered radiation active component includes any one of copper oxide, aluminum oxide, beryllium oxide, tungsten oxide, platinum oxide, bismuth oxide, lead oxide, iridium oxide, gold oxide or mercury oxide, or a combination of at least two of them, preferably a combination of bismuth oxide and aluminum oxide.

[0028] Preferably, the mass ratio of the bismuth oxide to the aluminum oxide is 1 to 2:1, for example, 1:1, 1.2:1, 1.3:1, 1.4:1, 1.5:1, 1.6:1, 1.7:1, 1.8:1, 1.9:1 or 2:1, but is not limited to the listed values, and other values ​​not listed in the range are also applicable. Further, through the above preferred combination, better imaging and anti-scattered radiation effects are achieved.

[0029] Preferably, the supporting body comprises a flexible supporting mesh layer in which the anti-scattered radiation active components are filled.

[0030] Preferably, the thickness of the flexible supporting mesh layer is 0.08-0.5 mm, for example, it can be 0.08 mm, 0.1 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm, but is not limited to the listed values, and other unlisted values ​​within the range are also applicable.

[0031] The present invention has no special restrictions on the material of the flexible support mesh layer, and any material known to those skilled in the art that can be used as a medical drape or a drape can be used.

[0032] Preferably, the material of the flexible supporting mesh layer includes non-woven fabric and / or cotton fabric.

[0033] The present invention has no special limitation on the mesh in the flexible support mesh layer, and any mesh size known to those skilled in the art for embedding anti-scattered radiation active components can be used.

[0034] Preferably, the supporting body comprises a flexible supporting layer disposed on one side or both sides of the anti-scattered radiation active component, preferably, a flexible supporting layer is disposed on both sides.

[0035] Preferably, the thickness of the flexible supporting layer is 0.05-0.5 mm, for example, it can be 0.05 mm, 0.1 mm, 0.15 mm, 0.2 mm, 0.25 mm, 0.3 mm, 0.35 mm, 0.4 mm, 0.45 mm or 0.5 mm, but is not limited to the listed values, and other unlisted values ​​within the range are also applicable.

[0036] The present invention has no particular limitation on the material of the flexible support layer, and any material known to those skilled in the art that can be used as a medical drape or a drape can be used. Preferably, the material of the flexible support layer includes non-woven fabric and / or cotton fabric.

[0037] Preferably, when the flexible supporting layer is provided, the thickness of the layer where the anti-scattered radiation active component is located is 0.08 to 0.5 mm, for example, it can be 0.08 mm, 0.1 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm, but is not limited to the listed values, and other values ​​not listed within the range are also applicable.

[0038] The flexible shielding material for filtering stray light and preventing scattered rays for interventional surgery of the present invention is widely used in the preparation of protective materials for interventional surgery, especially in the preparation of protective materials for patients undergoing interventional surgery, and has a better protective effect on patients.

[0039] The present invention has no special restrictions on the preparation method of the flexible shielding material for filtering stray light and preventing scattered rays for interventional surgery, as long as the corresponding product can be prepared, but the following preparation method is preferred to produce a product with better performance.

[0040] Preferably, the method for preparing the anti-scattered ray flexible shielding material for filtering stray light for interventional surgery comprises the following steps: wet ball milling, granulation, sintering and crushing of the raw materials of the anti-scattered ray active component to obtain the intermediate particles;

[0041] The intermediate particles and the auxiliary agent are mixed and sequentially subjected to calendering, loading, casting and spraying to obtain the anti-scattered ray flexible shielding material.

[0042] Preferably, the auxiliary agent includes any one of polymer materials, lubricants, plasticizers, antioxidants, stabilizers, antioxidants, flame retardants, coupling agents or deodorants, or a combination of at least two of them, wherein typical but non-limiting combinations are a combination of lubricants and plasticizers, a combination of antioxidants and stabilizers, a combination of lubricants and antioxidants, a combination of stabilizers and flame retardants, a combination of antioxidants and plasticizers, and a combination of deodorants and plasticizers.

[0043] Preferably, the polymer material includes polymer glue.

[0044] Preferably, the loading comprises any one of spraying, coating, knife coating, coating or dipping, or a combination of at least two thereof.

[0045] Compared with the prior art, the present invention has at least the following beneficial effects:

[0046] (1) The flexible shielding material for filtering stray light and preventing scattered radiation for interventional surgery provided by the present invention can protect the irradiated part of the patient during interventional surgery, reducing the radiation level by more than 60%, and more than 90% under optimal conditions, and has broad application prospects;

[0047] (2) The anti-scattered ray flexible shielding material for filtering stray light for interventional surgery provided by the present invention can filter out ambient reflected light and stray light in x / gamma rays, thereby improving the clarity of imaging. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic diagram of a flexible shielding material for preventing scattered rays for filtering stray light in interventional surgery provided in Example 1 of the present invention.

[0049] Figure 2 This is the x-ray energy spectrum provided by Example 1 of the present invention.

[0050] Figure 3 This is an imaging diagram provided by Example 1 of the present invention.

[0051] Figure 4 It is a schematic diagram of a flexible shielding material for preventing scattered rays for filtering stray light in interventional surgery provided by Example 4 of the present invention.

[0052] Figure 5 This is the x-ray energy spectrum provided by Comparative Example 3 of the present invention.

[0053] Figure 6 This is an imaging diagram provided by Comparative Example 3 of the present invention.

[0054] In the figure: 121 - first flexible supporting layer; 122 - second flexible supporting layer; 11 - anti-scattered ray active component layer; 22 - flexible supporting mesh layer; 21 - anti-scattered ray active component. DETAILED DESCRIPTION

[0055] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0056] The present invention is further described in detail below. However, the following examples are only simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0057] Example 1

[0058] This embodiment provides a flexible shielding material for preventing scattered rays and improving imaging for use in interventional surgery. Figure 1 As shown, the anti-scattered ray flexible shielding material includes an anti-scattered ray active component and a supporting body; specifically, it includes a first flexible supporting layer 121, an anti-scattered ray active component layer 11, and a second flexible supporting layer 122 which are sequentially arranged;

[0059] The active component of the anti-scattered ray is bismuth and its oxide; the total content of bismuth element in the anti-scattered ray flexible shielding material is 500g / m 2 .

[0060] The thickness of the first flexible supporting layer 121 and the second flexible supporting layer 122 are both 0.3 mm. The materials of the first flexible supporting layer 121 and the second flexible supporting layer 122 are both non-woven fabrics. The thickness of the anti-scattered radiation active component layer 122 is 0.1 mm.

[0061] This embodiment also provides a method for using the flexible anti-scattered ray shielding material for filtering stray light for interventional surgery in heart bypass surgery, specifically comprising: in heart bypass surgery, the flexible anti-scattered ray shielding material is placed on the patient's interventional irradiation site, and then the x-ray emission device is turned on to perform the surgery. Compared with the original radiation, this embodiment reduces the radiation by more than 60%. Taking 77KV as an example, the obtained x-ray energy spectrum is as follows Figure 2 As shown, it can be seen that the 10-20 kV rays are filtered out, and the imaging diagram is as follows Figure 3 As shown, from Figure 3 It can be seen that the image formation is clearly visible.

[0062] The method for preparing the anti-scattered ray flexible shielding material of Example 1 comprises:

[0063] (1) Production of functional materials for anti-scattered radiation absorbers

[0064] The specific composition is shown in Table 1:

[0065] Table 1

[0066] raw material Bismuth Oxide Rubber POE6102 Antioxidant: Antioxidant 1010 Plasticizer DINP Wt% 80 15 2.5 2.5

[0067] The production steps are as follows:

[0068] Internal mixing: mix rubber, functional powder and small materials (anti-aging agent and plasticizer) in an internal mixer, heat to 130℃, and discharge the materials after clinkering; open mixing: use an open mixer to mix the internally mixed materials again; refining and crushing: use an internal mixer to refine the open-mixed rubber sheets into small lumps and then crush them with a crusher; calendering: process them into film sheets with a thickness of 0.1mm by calendering.

[0069] (2) Finished product preparation

[0070] The production steps are as follows:

[0071] Slitting: Cut the two-layer nonwoven fabric and the single-layer absorbent into the required size

[0072] Sewing: Using a sandwich structure, the absorbent material is placed between two layers of non-woven fabrics and sewn by a CNC sewing machine.

[0073] Example 2

[0074] This embodiment provides an anti-scattered ray flexible shielding material for filtering stray light and improving imaging for interventional surgery, wherein the anti-scattered ray flexible shielding material comprises an anti-scattered ray active component and a supporting body; specifically, the anti-scattered ray flexible shielding material comprises a first flexible supporting layer, an anti-scattered ray active component layer, and a second flexible supporting layer arranged in sequence;

[0075] The active component of the anti-scattered ray is lead oxide; the total content of lead element in the anti-scattered ray flexible shielding material is 800g / m 2 .

[0076] The thickness of the first flexible supporting layer and the second flexible supporting layer are both 0.5 mm, the materials of the first flexible supporting layer and the second flexible supporting layer are both PU leather, and the thickness of the anti-scattered radiation active component layer is 0.1 mm.

[0077] This embodiment also provides a method for using the flexible anti-scattered ray shielding material for filtering stray light for interventional surgery in heart bypass surgery, which specifically includes: in the heart bypass surgery, placing the flexible anti-scattered ray shielding material on the patient's interventional irradiation site, and then turning on the x-ray emission device to perform the surgery.

[0078] Due to the use of the anti-scattered ray flexible shielding material, the radiation level received by the patient is significantly reduced, which is reduced by more than 65% compared with the original radiation.

[0079] Example 3

[0080] This embodiment provides an anti-scattered ray flexible shielding material for filtering stray light and improving imaging for interventional surgery, wherein the anti-scattered ray flexible shielding material comprises an anti-scattered ray active component and a supporting body; specifically, the anti-scattered ray flexible shielding material comprises a first flexible supporting layer, an anti-scattered ray active component layer, and a second flexible supporting layer arranged in sequence;

[0081] The active component for preventing scattered radiation is platinum oxide; the total content of platinum in the flexible shielding material for preventing scattered radiation is 907 g / m 2 .

[0082] The thickness of the first flexible supporting layer and the second flexible supporting layer are both 0.05 mm, the materials of the first flexible supporting layer and the second flexible supporting layer are both Oxford cloth, and the thickness of the anti-scattered radiation active component layer is 0.2 mm.

[0083] This embodiment also provides a method for using the flexible anti-scattered ray shielding material for filtering stray light for interventional surgery in tumor intervention. The method includes: in tumor intervention surgery, placing the flexible anti-scattered ray shielding material on the patient's interventional irradiation site, and then turning on the x-ray emission device to perform the surgery.

[0084] Due to the use of the anti-scattered ray flexible shielding material, the radiation level received by the patient is significantly reduced, which is reduced by more than 60% compared with the original radiation.

[0085] The steps of Examples 2 to 3 were carried out with reference to the steps of Example 1.

[0086] Example 4

[0087] This embodiment provides a flexible shielding material for preventing scattered rays and improving imaging for use in interventional surgery. Figure 4 As shown, the anti-scattered ray flexible shielding material includes an anti-scattered ray active component 21 and a supporting body.

[0088] The supporting body comprises a flexible supporting mesh layer 22 in which the anti-scattered radiation active component 21 is filled in the mesh; the thickness of the flexible supporting mesh layer 22 is 0.1 mm.

[0089] The anti-scattered ray active component 21 is a combination of bismuth oxide and aluminum oxide; the total content of the anti-scattered ray elements in the anti-scattered ray flexible shielding material is 226 g / m 2 , the mass ratio of bismuth oxide to aluminum oxide is 1.8:1.

[0090] This embodiment also provides a method for using the flexible anti-scattered ray shielding material for filtering stray light for interventional surgery in tumor intervention. The method includes: in tumor intervention surgery, placing the flexible anti-scattered ray shielding material on the irradiation site of the patient, and then turning on the x-ray emission device to perform the surgery.

[0091] Due to the use of the anti-scattered ray flexible shielding material, the radiation level received by the patient is significantly reduced, which is reduced by more than 75% compared with the original radiation.

[0092] The method for preparing the anti-scattered ray flexible shielding material of this embodiment includes:

[0093] (1) Production of functional materials for anti-scattered radiation absorbers

[0094] The specific composition is shown in Table 2:

[0095] Table 2

[0096]

[0097] The production steps are as follows:

[0098] Mixed slurry: The radiation absorber material, PVC paste resin S-800 and small material (stabilizer: organic tin heat stabilizer 181) are uniformly mixed to prepare PVC slurry containing functional materials.

[0099] (2) Finished product preparation

[0100] The production steps are as follows:

[0101] Glue coating: PVC slurry is dipped onto the mesh cloth through the dipping process, and the required design thickness is achieved through multiple dipping processes.

[0102] Drying: The mesh cloth with glue is dried by baking at a high temperature of 165°C to prepare a finished product.

[0103] Example 5

[0104] This embodiment provides an anti-scattered ray flexible shielding material for filtering stray light and improving imaging in interventional surgery. The anti-scattered ray flexible shielding material includes an anti-scattered ray active component and a supporting body.

[0105] The supporting body comprises a flexible supporting mesh layer in which the anti-scattered ray active components are filled; the thickness of the flexible supporting mesh layer is 0.2 mm.

[0106] The anti-scattered ray active component is a combination of bismuth oxide and aluminum oxide; the total content of the anti-scattered ray elements in the anti-scattered ray flexible shielding material is 450g / m 2 , the mass ratio of bismuth oxide to aluminum oxide is 1.3:1.

[0107] This embodiment also provides a method for using the flexible anti-scattered ray shielding material for filtering stray light for interventional surgery in neurointervention. The method includes: in neurointerventional surgery, placing the flexible anti-scattered ray shielding material on the patient's intervention site, and then turning on the x-ray emission device to perform the surgery.

[0108] Due to the use of the anti-scattered ray flexible shielding material, the radiation level received by the patient is significantly reduced, which is reduced by more than 75% compared with the original radiation.

[0109] Example 6

[0110] This embodiment provides a flexible shielding material for preventing scattered rays and improving imaging for use in interventional surgery. The flexible shielding material for preventing scattered rays is the same as that of Embodiment 5 except that the mass ratio of bismuth oxide to aluminum oxide is 4:1.

[0111] Compared with Example 6, Example 5 has a better filtering effect on 20-30 kV rays, and there is basically no loss of 40-70 kV rays, and the imaging and protection effects are better.

[0112] Example 7

[0113] This embodiment provides a flexible shielding material for preventing scattered rays and improving imaging for use in interventional surgery. The flexible shielding material for preventing scattered rays is the same as that of Embodiment 5 except that the mass ratio of bismuth oxide to aluminum oxide is 0.5:1.

[0114] Compared with Example 7, Example 5 has a significantly better overall protection effect, and the radiation in Example 7 is reduced by more than 60% compared with the original.

[0115] The preparation methods of Examples 5 to 7 were carried out with reference to Example 4.

[0116] Comparative Example 1

[0117] This comparative example provides a scattered ray-proof flexible shielding material, wherein the total content of the scattered ray-proof flexible shielding material excluding bismuth is 1000 g / m 2 Except for this, the rest are the same as in Example 1.

[0118] Since the content of bismuth in this comparative example is too high, not only a large amount of 10-40 kV rays are absorbed, but also most of 50-70 kV rays are absorbed, resulting in poor final imaging clarity.

[0119] Comparative Example 2

[0120] This comparative example provides a scattered ray protection flexible shielding material, wherein the total content of the scattered ray protection flexible shielding material excluding lead elements is 100 g / m2 Except for this, the rest are the same as in Example 2.

[0121] Since the content of lead element in this comparative example is low, it has basically no effect of protecting against X-ray radiation and fails to achieve the effect of making the image clearer.

[0122] Comparative Example 3

[0123] This comparative example provides a flexible material, which is the same as Example 1 except that bismuth oxide is not added to the flexible material.

[0124] This comparative example also provides a method for using the flexible material in heart bypass surgery, which specifically includes: in the heart bypass surgery, placing the flexible material on the patient's intervention site, and then turning on the X-ray emission device to perform the surgery.

[0125] Taking 77KV as an example, the obtained X-ray energy spectrum is as follows Figure 5 As shown, compared Figure 5 and Figure 2 It can be clearly seen that the flexible material for preventing scattered rays is used in Example 1. Compared with the flexible material for preventing scattered rays not used in Comparative Example 3, the maximum energy of the x-ray in Example 1 is ≤2×10 6 keV·cm 2 mAs, while the maximum energy in comparative example 3 can reach 6.0×10 6 keV·cm 2 mAs or more, the overall radiation level is reduced by more than 90%, and in Example 1, 10-20 kV rays are basically completely filtered out, while 40-70 kV rays are more prominent.

[0126] Imaging Figure 6 As shown, from Figure 6 and Figure 3 It can be seen that in Example 1, since the 10-20 kV rays are basically completely filtered out, the 40-70 kV rays are more prominent, and the imaging is obviously clearer.

[0127] In summary, the anti-scattered ray flexible shielding material for filtering stray light for interventional surgery provided by the present invention not only solves the problem of radiation damage to patients, but also optimizes the imaging effect, and has broad application prospects.

[0128] The applicant declares that the present invention illustrates the detailed structural features of the present invention through the above-mentioned embodiments, but the present invention is not limited to the above-mentioned detailed structural features, that is, it does not mean that the present invention must rely on the above-mentioned detailed structural features to be implemented. Those skilled in the art should understand that any improvement of the present invention, equivalent replacement of the components selected by the present invention, addition of auxiliary components, selection of specific methods, etc., all fall within the protection scope and disclosure scope of the present invention.

Claims

1. Application of a flexible shielding material for preventing scattered radiation in the preparation of protective materials for patients undergoing interventional surgery, characterized in that: The anti-scattered ray flexible shielding material comprises an anti-scattered ray active component and a supporting body; the supporting body comprises a flexible supporting layer arranged on one side or both sides of the anti-scattered ray active component; the anti-scattered ray active component is bismuth and its oxide, and the content of bismuth element in the anti-scattered ray flexible shielding material is 226-907 g / m 2 ; The thickness of the flexible support layer is 0.05 to 0.5 mm; when the flexible support layer is provided, the thickness of the layer where the anti-scattered radiation active component is located is 0.08 to 0.5 mm; Alternatively, the supporting body comprises a flexible supporting mesh layer in which the anti-scattered ray active component is filled; the anti-scattered ray active component is a combination of bismuth oxide and aluminum oxide in a mass ratio of 1.2 to 1.8:1, and the total content of bismuth and aluminum in the anti-scattered ray flexible shielding material is 226 to 907 g / m 2 ; The anti-scattered ray flexible shielding material can filter 10-30 kV X-rays.

2. The use of the anti-scattered radiation flexible shielding material according to claim 1 in preparing protective materials for patients undergoing interventional surgery, characterized in that: When the anti-scattered ray active component is a combination of bismuth oxide and aluminum oxide, the content of bismuth and aluminum in the anti-scattered ray flexible shielding material is 226-500 g / m 2 .

3. The use of the anti-scattered radiation flexible shielding material according to claim 1 in the preparation of protective materials for patients undergoing interventional surgery, characterized in that: The thickness of the flexible supporting mesh layer is 0.08-0.5 mm.

Images