High-quality medical X-ray imaging device

Abstract

The invention discloses a high-quality medical X-ray imaging device which comprises an X-ray emitting part, an imaging part and an X-ray light-transmitting and light-bundling mechanism, a shielding part of the X-ray light-transmitting and light-bundling mechanism is of a multi-layer structure, the side, close to the X-ray emitting part, of the shielding part is a main shielding layer, and the side, close to the imaging part, of the shielding part is an auxiliary shielding layer; the main shielding layer is composed of heavy metal, and the auxiliary shielding layer is composed of light metal. By adopting the innovative shielding part formed by combining the main shielding layer and the auxiliary shielding layer, scattered rays of X-rays are greatly reduced while the X-rays are more effectively absorbed, so that the resolution of an image after X-ray radiography is improved, interference to the X-ray image is reduced, and the diagnosis efficiency of a doctor is improved; meanwhile, the damage to the human body is further reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical equipment, in particular to the field of light source imaging equipment. BACKGROUND

[0002] At present, X-ray imaging technology has been widely used in the field of medical equipment. Since X-rays have radiation, they can cause damage to human health, so it is very important to control the range of X-rays. The shielding layer for controlling the irradiation area of X-rays in the prior art usually uses a single layer of lead plate with a thickness of about 2mm for shielding. However, due to the relatively large energy of X-rays, when X-rays pass through the channel surrounded by the shielding layer, many scattered rays will be generated at the edge of the shielding layer. These scattered rays will irradiate other parts that do not need to be photographed, causing damage to the human body and affecting the image quality.

[0003] The purpose of medical X-ray imaging is to provide information about the photographed part to help doctors make diagnoses, and image clarity is the key. The common way at present is to increase the intensity of X-rays to improve the contrast of the image, thereby improving the clarity. However, the increase in X-ray intensity also increases the scattered rays of X-rays, causing serious edge scattering, which will cause a decrease in image resolution and an increase in interference, especially in the edge part of the image, which seriously affects the diagnosis of doctors. SUMMARY

[0004] To solve the above problems of damage to the human body caused by a large number of scattered rays, i.e. edge scattering, and the decrease in image resolution and the increase in interference, which affect the diagnosis of doctors, the inventors have conducted long-term observation and experiments, learned relevant theoretical knowledge, tested various materials and combinations, and tried to use a multi-layer structure of the shielding part and precisely control the X-ray irradiation area to solve the above problems, reduce X-ray scattering, and improve image resolution. Therefore, the present application proposes a high-quality medical X-ray imaging device.

[0005] The high-quality medical X-ray imaging device provided by the present application comprises an X-ray emitting part, an imaging part and an X-ray bright beam light mechanism, characterized in that the shielding part of the X-ray bright beam light mechanism is a multi-layer structure comprising a main shielding layer and an auxiliary shielding layer, the main shielding layer is composed of a heavier metal, and the auxiliary shielding layer is composed of a lighter metal.

[0006] As a further improvement of the present application, the main shielding layer is divided into two layers, each having a blocking ability of not less than 0.9mm lead equivalent.

[0007] As a further improvement of the present application, the auxiliary shielding layer has at least two layers, each having a blocking ability of not more than 0.5mm lead equivalent.

[0008] As a further improvement of the present application, the total blocking capacity of the main shielding layer is 1.8-2.5 mm lead equivalent; the total blocking capacity of the auxiliary shielding layer is one-half to three-fourths of the total blocking capacity of the main shielding layer.

[0009] As a further improvement of the present application, the layer-by-layer combination error of the main shielding layer and the auxiliary shielding layer at the X-ray light passing edge is no more than 0.1 mm.

[0010] As a further improvement of the present application, the heavier metal of the main shielding layer is lead with an atomic weight of 207.2, and the lighter metal of the auxiliary shielding layer is iron or aluminum, both of which have an atomic weight smaller than that of lead.

[0011] As a further improvement of the present application, the heavier metal of the main shielding layer is lead with an atomic weight of 207.2, and the auxiliary shielding layer is divided into three layers, which are arranged in sequence as the aluminum, lead, iron, lead, and aluminum shielding layers.

[0012] As a further improvement of the present application, an outer casing is further provided, and an adjusting mechanism is further provided outside the outer casing to control the movement of the shielding part.

[0013] As a further improvement of the present application, an inner casing is further provided, and a light emitting device is provided inside the inner casing.

[0014] As a further improvement of the present application, a light source button is further provided outside the outer casing to control the light emitting device.

[0015] The present application has the following beneficial effects: the shielding part composed of the innovative main shielding layer and auxiliary shielding layer can effectively absorb X-rays and greatly reduce the scattering of X-rays, thereby improving the resolution of the image after X-ray photography, reducing the interference on the X-ray image, improving the diagnosis efficiency of doctors, and further reducing the damage to the human body. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is an overall explosion view of the high-quality medical X-ray imaging device of the present application;

[0017] Figure 2 is an explosion view of the first gate;

[0018] Figure 3 is a combination error diagram of one corner of the combined main and auxiliary shielding layers.

[0019] The correspondence between the reference signs and the component names is as follows:

[0020] X-ray emitting part 10; reflecting lens 15; light emitting device 18; first gate 20; first support plate 22;

[0021] first baffle group 24; second shutter 30; second support plate 32; second baffle group 34; main shield layer 40;

[0022] auxiliary shield layer 44; inner casing 50; outer casing 52; light source button 56; first adjusting knob 60;

[0023] second adjusting knob 62; imaging part 70; d-shield layer combination error. DETAILED DESCRIPTION:

[0024] The technical solutions in the embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0026] The high-quality medical X-ray imaging device of the present application will be further illustrated below in combination with the accompanying drawings and specific embodiments.

[0027] The high-quality medical X-ray imaging device provided by the application comprises an X-ray emitting part 10, an imaging part 70 and an X-ray light transmission light mechanism, and is characterized in that the shielding part of the X-ray light transmission light mechanism is a multi-layer structure comprising a main shielding layer 40 and an auxiliary shielding layer 44, the main shielding layer 40 is composed of a heavy metal, and the auxiliary shielding layer 44 is composed of a light metal. Since lead has a large absorption effect on radiation, it is a material widely used for radiation protection. In order to compare the shielding performance of various protective materials, the radiation shielding ability of lead is usually taken as a reference, and the blocking ability of a 1mm thick lead plate is taken as a lead equivalent. The thickness of the lead layer that achieves the same shielding effect as a certain shielding material of a certain thickness is called the lead equivalent of the shielding material. When other protective materials are used and the protective efficiency is considered, the lead equivalent is often used. The main shielding layer 40 can be divided into two layers, and each layer has a blocking ability of not less than 0.9mm lead equivalent. The auxiliary shielding layer 44 has at least two layers, and each layer has a blocking ability of not more than 0.5mm lead equivalent. The total blocking ability of the main shielding layer 40 is 1.8-2.5mm lead equivalent; the total blocking ability of the auxiliary shielding layer 44 is half to three-quarters of the total blocking ability of the main shielding layer 40. According to actual use requirements, the total blocking ability of the main shielding layer 40 in mm lead equivalent and the total blocking ability of the auxiliary shielding layer 44 in mm lead equivalent can be adjusted within a certain range. The layer-by-layer combination error of the main shielding layer 40 and the auxiliary shielding layer 44 at the edge of the X-ray light transmission light is not more than 0.1mm, that is, after the main shielding layer 40 and the auxiliary shielding layer 44 are combined, they should be flush, and the combination error should not be too large to cause excessive radiation to pass through and affect the shielding effect.

[0028] One of the embodiments of the application is a single auxiliary shielding layer, the main shielding layer 40 has only one layer, which uses heavy metal lead with an atomic weight of 207.2, and the auxiliary shielding layer 44 also has only one layer, which uses light metal such as iron with an atomic weight of about 56 or aluminum with an atomic weight of about 27, and the atomic weight of the light metal is less than that of lead. In this embodiment, the main shielding layer uses a lead plate with a thickness of 2mm, and the auxiliary shielding layer 44 uses a steel plate with a thickness of 3mm. Through the blocking of the main shielding layer 40, the auxiliary shielding layer 44 is more convenient for absorbing the X-rays attenuated by the main shielding layer 40, reducing scattering and interference, and improving the resolution of the X-ray image.

[0029] One of the embodiments of the present application provides three auxiliary shielding layers, wherein the main shielding layer 40 is divided into two layers, and the heavier metal used is lead with an atomic weight of 207.2, the auxiliary shielding layer 44 is divided into three layers, and the main shielding layer 40 and the auxiliary shielding layer 44 together have five layers, the main and auxiliary shielding layers are arranged alternately, and the order is aluminum, lead, iron, lead, and aluminum shielding layers. The X-rays passing through the edge of the light port will first contact the aluminum shielding layer, and part of the X-rays will be absorbed by the aluminum shielding layer. The scattered X-rays will contact the lead shielding layer. The lead shielding layer has high equivalent blocking and strong blocking ability. The shielding surface formed can be understood as a relatively "hard" shielding surface. The reflection of X-rays is greater than the absorption, which can effectively block X-rays and absorb part of the X-rays. The intensity of the X-rays passing through the lead shielding layer is attenuated to a low level. These attenuated X-rays will contact the iron shielding layer. The iron shielding layer has a relatively low equivalent blocking, and the shielding surface formed can be understood as a relatively "soft" shielding surface. The reaction to X-rays is absorption greater than reflection, which can absorb a large amount of X-rays with reduced energy. The subsequent X-rays passing through will again contact the lead shielding layer and the aluminum shielding layer for further blocking and absorption, reducing the total transmission rate of the scattered X-rays at the edge of the light port. The scattered X-rays passing through multiple layers of shielding are controlled within a small number range. After a large amount of scattering, most of the X-rays are in the collimated direction, pass through the imaging part 70 to form an image, and the edge scattering effect is minimal. Therefore, the points and lines displayed on the image are clearer, which is more conducive to the medical judgment of the doctor on the photographed part. The above description of the X-ray running process is a statistical description, not a description of the running process of a single beam of X-rays. The remaining description of the patent is basically the same.

[0030] One of the embodiments of the present application provides two auxiliary shielding layers, wherein the heavier metal of the main shielding layer 40 is lead with an atomic weight of 207.2, the auxiliary shielding layer 44 is divided into two layers, and the order is an iron shielding layer and an aluminum shielding layer in descending order of atomic weight. When the X-rays passing through the edge of the light port hit the lead of the main shielding layer 40, the X-rays reflected at a small angle will contact the iron shielding layer. The iron shielding layer will attenuate the intensity of the X-rays while absorbing the X-rays. The X-rays with attenuated intensity will further be absorbed by the aluminum shielding layer composed of aluminum. In this way, the X-ray scattered rays reaching the imaging part 70 are fewer, and the image formed by the imaging part 70 is clearer, which is more convenient for doctors to accurately analyze the photographed part. The thickness of the lead layer of the main shielding layer 40 can be slightly reduced by increasing the millimeter lead equivalent of the auxiliary shielding layer 44 to achieve the same X-ray shielding effect and reduce the scattering interference at the edge of the light port.

[0031] As the purpose of the present application to increase the X-ray intensity for improving the definition and increasing the contrast, precise control of the X-ray irradiation area, reduce the harm to the photographer, also provided with the outer shell 52 and the inner shell 50, the outer side of the outer shell 52 is provided with adjusting mechanism, to control the shielding part moves, the outer side of the outer shell 52 is also provided with light source button 56, to control the light emitting device 18, the inner side of the inner shell 50 is provided with light emitting device 18, the photographer before shooting, according to the visible light can be determined according to the display of the general projection range of the shooting part, and need to adjust the adjusting mechanism flexibly, control the shielding part moves, shielding the area outside the irradiation range, form the appropriate projection field of view, precise control of the X-ray irradiation area, to the greatest extent to avoid the shooting to other irrelevant area, reduce the harm to the human body. At the same time, also achieved only the required shooting site to be shot, use limited intensity of X-ray, to ensure the quality of the image.

[0032] As Figure 1 , Figure 2 shown, the present application presents a high quality medical X-ray imaging device, including: X-ray emitting part 10, reflector 15, light emitting device 18, the first gate 20, the first support plate 22, the first baffle group 24, the second gate 30, the second support plate 32, the second baffle group 34, the main shielding layer 40, auxiliary shielding layer 44, inner shell 50, outer shell 52, light source button 56, the first adjusting knob 60, the second adjusting knob 62, imaging part 70.

[0033] As Figures 1 to 3As shown, the first shutter 20 and the second shutter 30 are oppositely arranged to form an X-ray light passing beam light mechanism, the first shutter 20 comprises the first support plate 22 and the first baffle group 24, the second shutter 30 comprises the second support plate 32 and the second baffle group 34; the first baffle group 24 and the second baffle group 34 are both composed of the main shielding layer 40 and the auxiliary shielding layer 44. The main shielding layer 40 is two layers, and the composition material is lead, which has good radiation protection function, and the atomic weight is 207.2, the auxiliary shielding layer 44 is divided into three layers, and is composed of iron or aluminum, and the atomic weight is less than that of lead, the main shielding layer 40 and the auxiliary shielding layer 44 are arranged in intervals, and are aluminum, lead, iron, lead, and aluminum shielding layers in turn. Lead has a large absorption effect on radiation, and is a material widely used for radiation protection. In order to compare the shielding performance of various protective materials, the radiation protection ability of lead is usually taken as a reference, and the blocking ability of a 1mm thick lead plate is taken as a lead equivalent. The thickness of the lead layer that achieves the same shielding effect as a certain shielding material of a certain thickness is called the lead equivalent of the shielding material. When other protective materials are used and the protection efficiency is considered, the lead equivalent is often used for representation. In this embodiment, X-ray is used for human body part perspective, in the case of X-ray of the same intensity, the millimeter lead equivalent of the main shielding layer 40 can be slightly reduced, and the same X-ray shielding effect can be achieved by increasing the millimeter lead equivalent of the auxiliary shielding layer 44, and the scattering interference can be reduced. The total blocking ability of the main shielding layer 40 is 1.8-2.5 millimeter lead equivalent; the total blocking ability of the auxiliary shielding layer 44 is one half to three quarters of the total blocking ability of the main shielding layer 40, and the layer-by-layer combination error d of the main shielding layer 40 and the auxiliary shielding layer 44 at the X-ray light passing edge is not greater than 0.5mm. One side of the first support plate 22 and the second support plate 32 is provided with a track, and the first adjusting knob 60 and the second adjusting knob 62 can be adjusted to control the first baffle group 24 and the second baffle group 34 to move on the corresponding track respectively, so as to control the light passing area of the light passing port and avoid excessive irradiation.

[0034] As Figure 1As shown, the outer shell 52 is provided with the first adjusting knob 60, the second adjusting knob 62 and the light source button 56 on the outside, and the inner shell 50 is provided with the light emitting device 18 on the inside, and the center light transmission hole of the first support plate 22 is provided with an inclined thin mirror 15 with an inclination of about 45°. The purpose of designing the inner and outer shells is to accurately control the light transmission area of the light transmission mechanism, further reduce the excessive X-ray scattered lines passing through the light transmission port, strengthen the protection of X-rays, and reduce the harm to the photographer. The light source button 56 can control the light emitting device 18. After the installation and combination, the visible light emitted by the light emitting device 18 is reflected by the mirror 15 and reaches the imaging part 70 through the constraint of the light transmission mechanism baffle group, and is generally consistent with the X-ray projection area during radiography; before shooting, the photographer can determine the general projection range of the shooting part according to the displayed visible light, and flexibly adjust the adjusting mechanism according to the needs, control the movement of the shielding part, shield the area outside the irradiation range, form an appropriate projection field of view, and avoid irradiation to other irrelevant areas during radiography to the greatest extent, thereby reducing the harm to the human body and achieving the shooting of only the required shooting part, using limited intensity X-rays, and ensuring the quality of the image.

[0035] In practice, X-rays are emitted through the emitting part 10, and when passing through the light transmission mechanism, the X-rays outside the light transmission port area are shielded and absorbed by the shielding part, while a large amount of scattered lines are generated at the edge of the shielding part. The X-rays first contact the aluminum shielding layer, and after being absorbed by the aluminum shielding layer, they contact the lead shielding layer. The shielding layer has high millimeter lead equivalent and strong blocking ability. The shielding surface formed by the shielding layer can be understood as a relatively "hard" shielding surface, which reflects more X-rays than absorbs. It can effectively block X-rays and absorb part of the X-rays. The intensity of the X-rays after passing through the lead shielding layer is attenuated to a low level. These attenuated X-rays contact the iron shielding layer, which has relatively low millimeter lead equivalent. The shielding surface formed by the shielding layer can be understood as a relatively "soft" shielding surface, which absorbs more X-rays than reflects. It can absorb a large amount of X-rays with reduced energy. Subsequent X-rays will again contact the lead shielding layer and the aluminum shielding layer for further blocking and absorption, reducing the total pass rate of the scattered X-rays at the edge of the light transmission port. In this way, the scattered X-rays passing through multiple layers of shielding are controlled within a small number range. After a large number of scattering, most of the X-rays are in the collimated direction, pass through the shooting part to reach the imaging part 70 to form an image, and the edge scattering effect is minimized. Therefore, the points and lines displayed on the image are clearer, which is more conducive to the medical judgment of the photographer on the shooting part.

[0036] In summary, the high-quality medical X-ray imaging device provided by the present application determines the general projection range of the photographic part through the visible light emitted by the light-emitting device and adjusts the adjusting mechanism accordingly to form a more appropriate projection field of view, which not only avoids irradiation to other irrelevant areas during photography, but also greatly reduces the scattered X-ray lines through the multi-layer structure design of the shielding part, controls the X-ray scattering lines in the minimum range, minimizes the influence of edge scattering, reduces the damage to the human body, improves the resolution of the X-ray photograph image, ensures the high quality of the image, and improves the diagnosis efficiency of the doctor.

[0037] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be regarded as belonging to the present application.

Claims

1. A high-quality medical X-ray imaging device, comprising an X-ray emitting unit (10), an imaging unit (70), and an X-ray beam-passing mechanism, characterized in that: The shielding part of the X-ray beam mechanism has a multi-layer structure, including a main shielding layer (40) and an auxiliary shielding layer (44). The main shielding layer (40) is composed of a heavier metal, and the auxiliary shielding layer (44) is composed of a lighter metal.

2. The high-quality medical X-ray imaging device as described in claim 1, wherein the main shielding layer (40) is divided into two layers, each having a blocking capacity of not less than 0.9 mm lead equivalent.

3. The high-quality medical X-ray imaging device as described in claim 2, wherein the auxiliary shielding layer (44) has at least two layers, each having a blocking capacity of no more than 0.5 mm lead equivalent.

4. The high-quality medical X-ray imaging device as described in claim 3, characterized in that: The total blocking capacity of the main shielding layer (40) is 1.8 to 2.5 mm lead equivalent; the total blocking capacity of the auxiliary shielding layer (44) is one-half to three-quarters of the total blocking capacity of the main shielding layer (40).

5. The high-quality medical X-ray imaging device as described in claim 4, characterized in that: The layer-by-layer combination error (d) of the main shielding layer (40) and the auxiliary shielding layer (44) at the X-ray light transmission edge is no greater than 0.1 mm.

6. The high-quality medical X-ray imaging device as described in claim 1, characterized in that: The heavier metal in the main shielding layer (40) is lead, with an atomic weight of 207.2, and the lighter metal in the auxiliary shielding layer (44) is iron or aluminum, both of which have a smaller atomic weight than lead.

7. The high-quality medical X-ray imaging device as described in claim 5, characterized in that: The main shielding layer (40) is made of lead, which has an atomic weight of 207.

2. The auxiliary shielding layer (44) consists of three layers, with the main shielding layer (40) and the auxiliary shielding layer (44) spaced apart, and are aluminum, lead, iron, lead and aluminum shielding layers in sequence.

8. The high-quality medical X-ray imaging device as described in claim 6 or 7, characterized in that: It also has an outer casing (52), and an adjustment mechanism is provided on the outside of the outer casing (52) to control the movement of the shielding part.

9. The high-quality medical X-ray imaging device as described in claim 8, characterized in that: It also has an inner casing (50), and a light-emitting device (18) is provided on the inner side of the inner casing (50).

10. The high-quality medical X-ray imaging device as described in claim 9, characterized in that: The outer casing (52) is also provided with a light source button (56) for controlling the light-emitting device (18).

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