X-ray imaging system and adjustment method

Abstract

This invention provides an X-ray imaging system and its adjustment method. The X-ray imaging system includes a radiation detector and a radiation generator; the angle of the radiation detector relative to the radiation generator is adjustable, and the radiation generator is configured such that the irradiation direction of the emitted radiation is adapted to the angle adjustment of the radiation detector, so that the radiation irradiates the radiation receiving surface of the radiation detector. The adjustment method of the X-ray imaging system includes adjusting the angle of the radiation detector relative to the radiation generator. The adjustment of the radiation detector direction in this invention helps to avoid interference between the radiation detector and the patient and surrounding equipment, maintains a large positionable angle for the radiation emitted by the radiation detector, avoids obstruction of the operator's field of vision, and allows the X-ray imaging system to simultaneously meet the needs of interventional surgeries using both large and small radiation detectors.

Description

Technical Field

[0001] This invention relates to the field of X-ray imaging technology, and in particular to an X-ray imaging system and adjustment method. Background Technology

[0002] X-ray imaging systems are mainly used to acquire images of patients and can be used for the examination and treatment of systemic vascular diseases and tumors. For example, DSA (Digital Subtraction Angiography) technology is used in interventional treatment of cardiovascular diseases.

[0003] X-ray imaging systems typically include a radiation generator and a radiation detector. The radiation detector is usually a flat panel structure. Common flat panel configurations for DSA include 20cm×20cm, 30cm×30cm, and 40cm×40cm.

[0004] Based on a comprehensive consideration of the volume of the interventional organ and the pantograph positioning angle, the appropriate pantograph size is selected accordingly. For example, in interventional surgeries with small interventional organ volumes and large pantograph positioning angle requirements, smaller pantographs are usually used, such as 20cm×20cm pantographs. On the one hand, the imaging size of the pantograph is sufficient for the small interventional organ volume; on the other hand, the smaller size of the pantograph will reduce interference with nearby instruments during positioning and facilitate a larger positioning angle to meet the positioning viewpoint requirements. On the other hand, large-sized pantographs have smaller positioning angles, and some positioning angles during surgery cannot reach the required position, affecting the smooth progress of the surgery.

[0005] Small-sized flat panels have a smaller surface area and are generally only suitable for interventional surgeries involving smaller organs. For surgeries involving larger organs and less demanding requirements on the flat panel's positioning angle, such as neurointerventional surgeries, small-sized flat panels cannot meet the imaging needs of the surgery and require larger-sized flat panels.

[0006] Existing flat panels are typically fixed to a support arm. If two types of procedures—one involving small organs and the other large—need to be performed simultaneously, the size requirements of the flat panel and the limitation of fixing it to the support arm necessitate the purchase of multiple DSA models, resulting in high costs. Furthermore, even with two different DSA models available, the limited versatility of the equipment prevents full utilization of resources, as different devices are only suitable for different interventional treatments. Summary of the Invention

[0007] The purpose of this invention is to provide an X-ray imaging system and adjustment method, which allows for a larger size of the X-ray detector mounted on the support arm, and can meet the needs of both small-size and large-size X-ray detector interventional surgeries.

[0008] To address the problem that existing small-sized and large-sized X-ray detectors are difficult to use interchangeably in the same device, an X-ray imaging system and adjustment method are provided. This system and method allow for a larger size of the X-ray detector mounted on the support arm, and can meet the needs of both small-sized and large-sized X-ray detector interventional surgeries.

[0009] The X-ray imaging system in this embodiment is used to solve the problem that existing small-sized and large-sized X-ray detectors are difficult to use interchangeably in the same device, and includes: X-ray detector and X-ray generator;

[0010] The angle of the radiation detector relative to the radiation generator is adjustable, and the radiation generator is configured such that the irradiation direction of the radiation emitted by the radiation generator is adapted to the angle adjustment of the radiation detector, so that the radiation irradiates the radiation receiving surface of the radiation detector.

[0011] Optionally, the ray detector can be adjusted in a set direction with its mounting point as the center.

[0012] Optionally, the radiation generator is further configured such that the irradiation range of the radiation emitted by the radiation generator is adapted to the angle adjustment of the radiation detector, so that the irradiation range of the radiation is located within the radiation receiving surface.

[0013] Optionally, the radiation generator includes a radiation adjustment port for the radiation to pass through to adjust the irradiation direction of the radiation, wherein at least one of the direction, position, and size of the radiation adjustment port is adjustable to adjust the irradiation direction of the radiation.

[0014] Optionally, the radiation adjustment port is also used to adjust the irradiation range of the radiation.

[0015] Optionally, the radiation adjustment port includes at least two blocking members, which together form a channel for the radiation to pass through. The position and size of the channel are adjusted based on the relative movement of the blocking members. The irradiation direction and the irradiation range are adjusted based on the position and size of the channel.

[0016] Optionally, the X-ray imaging system may also include a support arm;

[0017] The support arm can rotate around a set center point;

[0018] The radiation detector is mounted on the support arm at an adjustable angle so that the orientation of the radiation receiving surface is adjustable.

[0019] The radiation generator is mounted on the support arm and is used to irradiate the radiation emitted by the radiation generator onto the radiation receiving surface.

[0020] The radiation detector and the radiation generator are arranged opposite each other, such that during X-ray imaging, the radiation detector and the radiation generator are located on either side of the subject.

[0021] The present invention also provides an adjustment method for an X-ray imaging system, wherein the angle of the X-ray detector relative to the X-ray generator is adjusted, thereby adjusting the orientation of the X-ray receiving surface of the X-ray generator.

[0022] Optionally, the adjustment method for the X-ray imaging system also includes: adjusting the X-ray detector;

[0023] The angle adjustment is adapted to the X-ray detector to adjust the irradiation direction of the X-rays emitted by the X-ray generator so that the irradiation direction of the X-rays is perpendicular to the X-ray receiving surface of the X-ray detector.

[0024] Optionally, the X-ray imaging system adjustment method further includes: adjusting the angle of the radiation detector to adjust the irradiation range of the radiation emitted by the radiation generator so that the irradiation range of the radiation is located within the radiation receiving surface.

[0025] Optionally, the X-ray imaging system adjustment method further includes: acquiring irradiated images;

[0026] Based on the irradiation direction and irradiation range of the radiation detector, the position of the irradiation range on the radiation receiving surface is calculated; and

[0027] The irradiated image is cropped based on the position of the irradiation range on the radiation receiving surface.

[0028] In summary, in the X-ray imaging system and adjustment method provided by the present invention, the X-ray imaging system includes: a radiation detector and a radiation generator;

[0029] The angle of the radiation detector relative to the radiation generator is adjustable, and the radiation generator is configured such that the direction of the emitted radiation is adapted to the angle adjustment of the radiation detector so that the direction of the radiation is perpendicular to the radiation receiving surface of the radiation detector.

[0030] This configuration allows for setting the adjustment position of the X-ray detector according to the needs of the interventional surgery scenario. In interventional surgery scenarios, a larger X-ray detector can be installed on the support arm, and the direction of the X-ray detector can be adjusted to adapt to different interventional surgery needs. Adjusting the direction of the X-ray detector helps to avoid interference between the X-ray detector and the patient and surrounding equipment, maintains a larger positionable angle for the X-ray emitted by the X-ray detector, obtains a better X-ray incident angle, and also avoids obstruction of the operator's field of vision by adjusting the direction of the X-ray detector, which is conducive to the smooth progress of the surgery. This allows the X-ray imaging system to meet the needs of both interventional surgeries with small-sized X-ray detectors and interventional surgeries with large-sized X-ray detectors.

[0031] Based on the adjustable direction of the X-ray detector, the function of adjustable X-ray irradiation direction has been added, so that the X-ray irradiation direction can be adjusted according to the adjustment of the X-ray detector direction, thereby ensuring that the X-ray irradiation direction is perpendicular to the X-ray receiving surface. The X-ray imaging system adjusted by this method can be adapted to the use of almost all interventional surgeries.

[0032] When the angle of the X-ray detector is adjusted, and the position and size of the X-ray generator's X-ray adjustment port are adjusted, the X-ray irradiation direction is offset relative to the support arm. In other words, the X-ray irradiation direction is not actually completely limited by the position of the support arm. This allows for a larger irradiation angle to match the needs of different interventional surgeries.

[0033] Furthermore, by adjusting the position and size of the X-ray generator's adjustment port, not only can the direction of X-ray irradiation be matched with the X-ray receiving surface, but the size of the irradiation range can also be adjusted simultaneously. Specifically, during operation, the irradiation range can be concentrated at the edge of the X-ray receiving surface, while the adjustment port becomes smaller, thus obtaining a small field of view (FOV) image at the edge of the X-ray receiving surface. This simulates the effect of a small-sized X-ray detector, enabling DSA systems with large-sized X-ray detectors to be used in clinical procedures such as cardiac interventional surgery that require small-sized X-ray detectors. Adjusting the X-ray detector angle can also yield an even smaller FOV image and a better X-ray incident angle. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the installation structure of the ray detector according to an embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure for adjusting the angle of the X-ray detector according to an embodiment of the present invention;

[0036] Figure 3This is a schematic diagram of the imaging structure of the X-ray detector in its initial state according to an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the imaging structure of the X-ray detector in the angle adjustment state according to an embodiment of the present invention;

[0038] Figure 5 This is a schematic diagram of the structure of the blocking member according to an embodiment of the present invention;

[0039] Figure 6 A schematic diagram of the structure when a small-sized X-ray detector is fixed on a support arm for use;

[0040] Figure 7 This is a schematic diagram of the initial state of a large-size X-ray detector that can be adjusted and mounted on a support arm according to an embodiment of the present invention.

[0041] Figure 8 For the embodiments of the present invention in Figure 7 A schematic diagram of the irradiation range under the condition;

[0042] Figure 9 This is a schematic diagram of the structure of a large-size X-ray detector after angle adjustment when it is adjustablely mounted on a support arm according to an embodiment of the present invention.

[0043] Figure 10 For the embodiments of the present invention in Figure 9 A schematic diagram of the irradiation range under the specified conditions.

[0044] The reference numerals in the attached figures are as follows:

[0045] 10 - X-ray detector; 11 - X-ray receiving surface; 12, 12' - irradiation range;

[0046] 20-Support arm;

[0047] 30-ray generator;

[0048] 40-ball hinge;

[0049] 50 - Radiation adjustment port; 51 - First blocking element; 52 - Second blocking element; 53 - Third blocking element;

[0050] 54 - Fourth blocking element; 55 - Channel;

[0051] 60 - Operating table;

[0052] 70 - Examinee;

[0053] a - The direction perpendicular to the width of the operating table and axis b; b - The direction of radiation emission;

[0054] c and d are two perpendicular directions in space. Detailed Implementation

[0055] The X-ray imaging system and adjustment method proposed in this invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this invention.

[0056] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to mean “and / or”; the term “a number” is generally used to mean “at least one”; and the term “at least two” is generally used to mean “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature. Additionally, as used in this invention, “installed,” “connected,” “joined,” and “set” on one element by another should be interpreted broadly, generally indicating only a connection, coupling, mating, or transmission relationship between the two elements, which can be direct or indirect through an intermediate element. They should not be construed as indicating or implying a spatial positional relationship between the two elements, i.e., one element can be located inside, outside, above, below, or to one side of another element, unless otherwise explicitly stated. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances. Furthermore, directional terms such as above, below, up, down, upward, downward, left, right, etc., are used relative to exemplary embodiments as shown in the figures, with upward or up direction pointing towards the top of the corresponding figure, and downward or down direction pointing towards the bottom of the corresponding figure.

[0057] In existing X-ray imaging systems, the X-ray detector is typically fixed to a support arm, and the detector itself cannot be adjusted; only the support arm can be positioned and adjusted. Depending on the specific needs of the interventional procedure, different sized X-ray detectors need to be mounted on the support arm. For example, a 20cm x 20cm detector is typically used in cardiac interventional procedures, while a 40cm x 40cm detector is typically used in neurological interventional procedures. Because the equipment is not universally compatible, multiple X-ray imaging systems of different specifications are usually required for different interventional procedures, leading to high costs. Furthermore, even if different sized detectors can be used on the same machine… When using an X-ray imaging system, the X-ray detector is fixed to the support arm. Replacing a small X-ray detector with a larger one can easily cause interference with surrounding equipment or obstruct the user's view. In addition, since the X-ray detector is fixed to the support arm, the range of the support arm's angle is the adjustable angle of the X-ray emitted by the detector. In other words, the adjustable angle of the X-ray is completely limited by the support arm. As the size of the X-ray detector increases, it is easy to interfere with the patient or surrounding equipment, causing the range of the support arm's angle to decrease. This, in turn, reduces the adjustable angle of the X-ray emitted by the detector, directly affecting the progress of interventional surgery.

[0058] Please refer to Figure 6 and Figure 7 As shown, existing X-ray detectors are typically flat panel detectors with a C-arm support arm. The flat panel detector and the X-ray generator are respectively mounted at both ends of the support arm and positioned opposite each other. The patient lies on the operating table. When the C-arm is positioned with the width of the operating table as its central axis, the maximum positioning angle is reached when the X-ray detector comes into contact with the patient. (Reference) Figure 6 As shown, if a 20cm x 20cm X-ray detector is installed, the maximum placement angle in this direction is 37°. Figure 7 As shown, if a 40cm×40cm X-ray detector is installed, the maximum positioning angle in this positioning direction is 29°, which is smaller. Similarly, when the C-arm is positioned with the width and length of the operating table or other directions as the central axis, the same technical problem of a smaller positioning angle exists. Moreover, due to the fixed installation of the X-ray detector, which cannot be adjusted, it can easily affect the operator's field of vision and interfere with the operation.

[0059] In order to solve the problem that existing small-sized and large-sized X-ray detectors are difficult to use in the same device, this embodiment provides an X-ray imaging system adjustment method and an X-ray imaging system. The system and method allow for a larger size of the X-ray detector mounted on the support arm, and can meet the needs of both small-sized and large-sized X-ray detector interventional surgeries.

[0060] The X-ray imaging system in this embodiment is used to solve the problem that existing small-sized and large-sized X-ray detectors are difficult to use interchangeably in the same device, including:

[0061] Includes a radiation detector 10 and a radiation generator 30;

[0062] The angle of the radiation detector 10 relative to the radiation generator 30 is adjustable. The radiation generator 30 is configured such that the irradiation direction of the radiation emitted by the radiation generator 30 is adapted to the angle adjustment of the radiation detector 10, so that the irradiation direction of the radiation is perpendicular to the radiation receiving surface 11 of the radiation detector 10.

[0063] The X-ray detector 10 is typically mounted on a base, such as on a support arm, and the X-ray detector 10 is mounted on the support arm in an adjustable manner.

[0064] The radiation receiving surface 11 refers to the surface of the radiation detector 10 facing the radiation source for receiving radiation. (Refer to...) Figure 3 As shown, the X-ray detector 10 is usually a flat plate structure, and the side of the plate facing the X-ray generator 30 for receiving X-rays is the X-ray receiving surface 11.

[0065] The X-ray detector 10 has multiple adjustable angles. It can swing in a single direction with a single degree of freedom to adjust the angle, or swing in several directions as the central axis to adjust the angle, or form a universal swing structure that can adjust the corresponding angle in all directions.

[0066] For example, with Figure 6 For reference, when the X-ray detector 10 is adjusted by swinging in a single degree of freedom, it is preferable to adjust the angle of the X-ray detector by swinging along the width of the operating table as the central axis. When the X-ray detector 10 is adjusted by swinging in several directions as the central axis, it is preferable to adjust the angle of the X-ray detector 10 by swinging along the width of the operating table and the direction of axis a as the central axis, where axis a is perpendicular to both the width of the operating table and axis b, and the direction of axis b is the emission direction of the X-ray and also the direction of the line connecting the center points of the two ends of the C-arm. Of course, the angle can also be adjusted by rotating in the width of the operating table and on both axis a and axis b.

[0067] Please refer to Figure 2 As shown, the X-ray detector 10 can be rotated along the X-axis, Y-axis, and Z-axis to adjust the direction of the X-ray detector, wherein the directions corresponding to the X-axis, Y-axis, and Z-axis can be specifically adjusted according to the surgical requirements. Figure 6To achieve rotation in three directions, a rotating shaft is used on each of the X, Y, and Z axes. This is existing technology. For example, a three-degree-of-freedom turntable can achieve rotation in three directions. In this case, the X-ray detector 10 can be fixed to the support arm by the three-degree-of-freedom turntable. The X-ray detector 10 can be adjusted manually or by an automatic control system. The automatic control system transmits the required angle adjustment information to the data processing center. The data processing center analyzes the received angle adjustment information and decomposes it into rotation information along the X, Y, and Z axes. This information is then transmitted to the actuators, which drive the three-degree-of-freedom turntable to rotate by the corresponding angles along the X, Y, and Z axes.

[0068] Please refer to Figure 1 In an alternative example, the X-ray detector 10 is adjusted in a universal manner. The X-ray detector 10 is mounted on the support arm 20 via a ball joint 40. In this case, the X-ray detector 10 can rotate in all directions. The ball joint is a standard part, and a suitable ball joint can be selected according to the angle adjustment position, or a ball joint can be customized according to the angle adjustment range requirements. Alternatively, a universal joint or other known structures that can achieve universal adjustment can also be used to install the X-ray detector 10.

[0069] This configuration allows the adjustment orientation of the X-ray detector 10 to be set according to the needs of the interventional surgery scenario, such as... Figure 7 and Figure 8 In various application scenarios, a larger-sized X-ray detector 10 can be installed on the support arm 20, and the direction of the X-ray detector 10 can be adjusted to suit different interventional surgical needs. Adjusting the direction of the X-ray detector 10 helps to avoid interference between the X-ray detector 10 and the patient and surrounding equipment, maintains a larger positionable angle for the X-rays emitted by the X-ray detector 10, obtains a better X-ray incident angle, and also avoids obstruction of the operator's field of vision by adjusting the direction of the X-ray detector 10, which is conducive to the smooth progress of the surgery. This allows the X-ray imaging system to meet the needs of both small-sized and large-sized X-ray detector interventional surgeries.

[0070] Based on the angle adjustment of the line detector 10, the irradiation direction of the rays is adaptively adjusted, wherein the irradiation direction of the rays is adapted to the angle adjustment of the ray detector so that the irradiation direction of the rays is perpendicular to the ray receiving surface 11 of the ray detector.

[0071] Since the radiation has a corresponding area size when it hits the radiation receiving surface 11, the actual angle between the radiation source point and the center point of the radiation range on the radiation receiving surface 11 is the angle of the radiation direction.

[0072] The X-ray generator 30 generally includes an X-ray tube. The X-ray tube 101 is a vacuum tube that generates X-rays by using a high voltage generated by a high voltage generating device. X-rays are generated by using a high voltage to accelerate the thermionic electrons released from the cathode and colliding the accelerated electrons with the tungsten anode.

[0073] The irradiation direction of the rays emitted by the X-ray generator 30 can be adjusted in various ways, such as by adjusting the direction of the vacuum tube to adjust the X-ray emission angle, or by adjusting the X-ray emission port of the X-ray generator 30 to adjust the X-ray emission angle, or by adjusting the orientation of the X-ray generator 30 to adjust the X-ray emission angle. In existing equipment, the X-ray generator 30 is generally a directly purchased device, and its vacuum tube is usually a fixed structure. Therefore, in this embodiment, it is preferable to adjust the X-ray direction by adjusting the orientation of the X-ray generator 30 or by adjusting the X-ray emission port of the X-ray generator 30. In this case, the driving method for adjusting the irradiation direction is similar to that of the X-ray detector 10, and both can adopt a structure similar to a ball joint or a three-degree-of-freedom turntable, which will not be elaborated here.

[0074] This adjustment method allows the X-ray imaging system to be applied to different interventional surgeries. Based on the different needs of each interventional surgery, the required angle between the radiation direction and the radiation receiving surface 11 of the radiation detector 10 varies. The X-ray imaging system performs three-dimensional imaging by passing X-rays through the patient's tissue, unlike two-dimensional images. When the X-ray angle is not perpendicular to the radiation receiving surface 11 of the radiation detector 10, the tissue in the obtained image will be different, and this image cannot be corrected by adjusting the scale like a two-dimensional image, resulting in a deviation between the obtained image and the ideal image. Furthermore, the required angle relationship between the radiation and the radiation receiving surface 11 differs depending on the location of the body. For example, when performing X-ray imaging on the human breast, a non-perpendicular relationship between the radiation and the radiation receiving surface 11 can still achieve good imaging results. However, when performing X-ray imaging on the patient's heart during cardiac interventional surgery, a non-perpendicular relationship between the radiation and the radiation receiving surface 11 makes it difficult to achieve good imaging results. Therefore, in this case, the radiation needs to be perpendicular to the radiation receiving surface 11.

[0075] Please refer to Figure 3 In the initial state, the rays emitted by the ray generator 30 are perpendicular to the ray receiving surface 11, and the irradiation range is... Figure 3 For the range 12 mentioned above, please refer to [the relevant documentation]. Figure 4 When the radiation generator 30 rotates counterclockwise, the irradiation direction of the radiation emitted by the radiation generator 30 is correspondingly deflected counterclockwise, so that the radiation remains perpendicular to the radiation receiving surface 11. At this time, the irradiation range is... Figure 4The range 12' described herein, the X-ray imaging system adjusted by this method, can be adapted for use in almost all interventional procedures;

[0076] Furthermore, the ray detector 10 can be adjusted in a set direction with its mounting point as the center.

[0077] The specific direction of the setting is not limited here. The angle adjustment direction of the X-ray detector 10 can be adaptively adjusted according to actual usage requirements, for example, by referring to... Figure 9 As shown, based on usage requirements, the X-ray detector 10 is adjusted in a counterclockwise direction, so either counterclockwise or clockwise direction is used as the set direction;

[0078] Alternatively, in another alternative embodiment, please refer to Figure 1 The X-ray detector 10 can be adjusted in any direction with its mounting point as the center. Adjusting the angle in any direction is also called universal adjustment. Based on the universal adjustment method, the position of the X-ray detector 10 can be easily adjusted. It is preferred to adopt a universal structure similar to a ball joint. The position of the X-ray detector 10 can be manually adjusted in real time to meet the user's needs. Alternatively, the commonly used position of the X-ray detector 10 can be set to several levels through an automatic control system. Different interventional surgeries can be adapted to several levels. During use, the direction of the X-ray detector 10 can be quickly adjusted by setting the corresponding level according to the needs of the interventional surgery.

[0079] Furthermore, the radiation generator 30 is also configured such that the irradiation range of the radiation emitted by the radiation generator 30 is adapted to the angle adjustment of the radiation detector 10, so that the irradiation range of the radiation is located within the radiation receiving surface 11.

[0080] In other words, the angle adjustment range of the X-ray detector 10 determines the adjustment range of the irradiation direction of the X-ray generator 30. Based on the angle adjustment range of the X-ray detector 10, the adjustment range of the irradiation direction of the X-ray generator 30 is determined, thereby ensuring that the irradiation range of the X-ray is always within the X-ray receiving surface 11, so as to ensure the integrity of image acquisition.

[0081] Still for reference Figure 3 and Figure 4 When the angle of the radiation detector 10 is adjusted, the irradiation direction is adjusted according to the adjusted angle, and the adjustment range of the irradiation direction of the radiation generator 30 is determined by the angle adjustment range of the radiation detector 10, so as to ensure that the adjusted irradiation range is still within the radiation receiving surface 11.

[0082] Furthermore, the radiation generator 30 includes a radiation adjustment port 50 for allowing the radiation to pass through in order to adjust the irradiation direction of the radiation. At least one of the direction, position, and size of the radiation adjustment port 50 is adjustable to adjust the irradiation direction of the radiation.

[0083] The ray adjustment port 50 can adjust the irradiation direction by adjusting the direction. The ray adjustment port 50 can be formed by a circular ring or a square ring. Taking a circular ring as an example, the middle part of the circular ring serves as the channel through which the ray passes. The circular ring can be driven to rotate to adjust the direction of the channel, thereby adjusting the irradiation direction of the ray passing through the channel. The circular ring can also be adjusted by a structure similar to a three-degree-of-freedom turntable or a ball joint as described above.

[0084] In another embodiment, the ray adjustment port 50 can also adjust the irradiation direction by adjusting its position. In this case, the ray adjustment port 50 can still be formed by a circular ring or a square ring. Taking a circular ring as an example, the circular ring can be driven to translate by hydraulic drive, linear motor drive or other drive forms, thereby adjusting the irradiation direction of the rays passing through the channel.

[0085] In another embodiment, the irradiation direction can also be adjusted by the size of the opening of the ray adjustment port 50. Please refer to [reference needed]. Figure 4 As shown, when the first blocking member 51 located on the left side of the ray adjustment port 50 slides to the right, the ray adjustment port 50 becomes smaller, and the center position of the ray adjustment port 50 moves to the right. Therefore, the direction of the line connecting the light source point to the center point of the irradiation range on the ray receiving surface 11 changes, that is, the irradiation direction changes. By adjusting the ray adjustment port 50 to a suitable size, the irradiation direction is ensured to be perpendicular to the ray receiving surface 11.

[0086] In another embodiment, the irradiation direction can be adjusted by simultaneously adjusting the direction and position of the ray adjustment port 50, or by simultaneously adjusting the position and size of the ray adjustment port 50, or by simultaneously adjusting the direction, position and size of the ray adjustment port 50; these will not be elaborated here.

[0087] Furthermore, the radiation adjustment port 50 is also used to adjust the irradiation range of the radiation.

[0088] In this embodiment, the position and size of the radiation adjustment port 50 are adjustable to control the irradiation direction and irradiation range of the radiation.

[0089] Please refer to the details. Figure 4As shown, when the first blocking member 51 located on the left side of the X-ray adjustment port 50 slides to the right, the X-ray adjustment port 50 becomes smaller. In fact, the center point of the X-ray adjustment port 50 also moves to the right. In other words, the position of the X-ray adjustment port 50 actually changes. Therefore, if the position and size of the X-ray adjustment port 50 can be adjusted, it can be achieved by adjusting the translation of the blocking member on one side of the X-ray adjustment port 50. Compared with the adjustment of the direction of the X-ray adjustment port 50, the drive structure required for driving the translation is relatively simple. It can be easily achieved by known drive structures such as screw and nut pair, hydraulic drive or cylinder drive. Moreover, it can also achieve synchronous control of the irradiation range and irradiation direction.

[0090] Please refer to Figure 3 and Figure 4 As shown, in Figure 3 In its initial state, the radiation range is relatively large, making it suitable for interventional surgical scenarios where the size of the radiation detector 10 is limited and a large radiation range is required, such as neurointerventional surgery; Figure 4 When the radiation is in a certain state, the radiation range is relatively small. This state can be used in interventional surgery scenarios where the size of the radiation detector 10 is limited and the radiation range requirement is small, such as cardiac interventional surgery.

[0091] When from Figure 3 The corresponding surgical scenario Figure 4 When the corresponding surgical scene is changed, the angle of the X-ray detector 10 needs to be adjusted, and the irradiation direction needs to be adjusted adaptively. Based on the synchronous adjustment of the position and size of the X-ray adjustment port 50, the irradiation range and irradiation direction are controlled at the same time, so that the irradiation direction is perpendicular to the X-ray receiving surface 11, and the irradiation range is reduced accordingly, and a suitable irradiation range is achieved.

[0092] During cardiac interventional surgery, focusing the image at the edge of the X-ray receiving surface 11 is more conducive to the procedure. (Reference) Figure 3 and Figure 4 As shown, Figure 3 The irradiation range is located on the entire radiation receiving surface 11, when... Figure 4During adjustment, the left boundary of the irradiation range is moved to the right, while the right boundary remains at the edge of the radiation receiving surface 11. The position of the radiation perpendicularly incident on the radiation receiving surface 11 is moved from the center of the radiation receiving surface 11 towards its right edge, concentrating the irradiation range at the edge of the plate. Simultaneously, the radiation adjustment port 50 is reduced. Specifically, the rotation angle of the radiation detector 10 can be matched to the irradiation direction using a data acquisition system. The data acquisition system can employ a microcontroller, PCL, or data processing chip, etc. The rotation angle of the radiation detector 10 is fed back to the data acquisition system in real time. Based on the rotation angle of the radiation detector 10, the data acquisition system calculates the irradiation angle perpendicular to the radiation receiving surface 11 and calculates the angle that concentrates the irradiation range at the edge of the plate. The size of the irradiation range is determined by the irradiation angle and the size of the irradiation range. The position and size of the X-ray adjustment port 50 are then determined by the control signal, which adjusts the position and size of the X-ray adjustment port 50 so that the irradiation range only projects to the edge of the plate and the irradiation direction is perpendicular to the X-ray receiving surface 11. This results in a small field of view (FOV) image at the edge of the X-ray receiving surface 11, simulating the effect of a small-sized X-ray detector 10. This small FOV image allows the DSA system with a large-sized X-ray detector 10 to be used in clinical procedures such as cardiac interventional surgery that require a small-sized X-ray detector 10. Adjusting the angle of the X-ray detector 10 can obtain an even smaller FOV image and a better X-ray incident angle.

[0093] Similarly, when from Figure 4 The corresponding surgical scenario Figure 3 When switching to the corresponding surgical scene, it is also necessary to adjust the angle of the X-ray detector 10 and the irradiation direction. Based on the synchronous adjustment of the position and size of the X-ray adjustment port 50, the irradiation range and irradiation direction are controlled at the same time, so that the irradiation direction is perpendicular to the X-ray receiving surface 11, and the irradiation range is expanded accordingly to achieve a suitable irradiation range.

[0094] The radiation adjustment port 50 includes at least two blocking members, which together form a channel for the radiation to pass through. The position and size of the channel are adjusted based on the relative movement of the blocking members. The irradiation direction and the irradiation range are adjusted based on the position and size of the channel.

[0095] Please refer to Figure 5As shown, this embodiment is provided with four blocking components, namely a first blocking component 51, a second blocking component 52, a third blocking component 53, and a fourth blocking component 54. The first blocking component 51 and the second blocking component 52 are arranged along the direction of the c-axis, and the third blocking component 53 and the fourth blocking component 54 are arranged along the direction of the d-axis. The c-axis and the d-axis are spatially perpendicular. The first blocking component 51, the second blocking component 52, the third blocking component 53, and the fourth blocking component 54 together form a rectangular channel 55. When each blocking component moves along its respective axis, the position and size of the channel 55 change accordingly, thereby causing the irradiation direction and the irradiation range of the ray to change.

[0096] The first blocking member 51 and the second blocking member 52 slide along the direction of the c-axis, while the third blocking member 53 and the fourth blocking member 54 slide along the direction of the d-axis. The direction of the c-axis corresponds to... Figure 4 In the left-right direction, when the first blocking member 51 slides to the right alone, it forms as follows: Figure 4 As shown, when the second blocking member 52 slides to the left alone, the irradiation direction shifts clockwise and the irradiation range becomes smaller. Alternatively, depending on the requirements of the operating conditions, both the first blocking member 51 and the second blocking member 52 can slide to the left or to the right. When both slide, they can slide at equal distances in the same direction, or slide at unequal distances in the same direction, or slide at equal distances in opposite directions, or slide at unequal distances in opposite directions.

[0097] In another embodiment, the third blocking member 53 and the fourth blocking member 54 may slide independently along the direction of the d-axis, or both may slide along the direction of the d-axis, depending on the requirements of the operating conditions.

[0098] In another embodiment, one or more of the first blocking member 51, the second blocking member 52, the third blocking member 53 and the fourth blocking member 54 can be selected to slide together according to the requirements of the working conditions.

[0099] In another embodiment, only two blocking members, the first blocking member 51 and the second blocking member 52, may be provided, still referring to... Figure 5 As shown, the first blocking member 51 and the second blocking member 52 are configured as sliding structures, while the components corresponding to the third blocking member 53 and the fourth blocking member 54 are internal components of the ray generator 30. At this time, the irradiation direction and the irradiation range of the ray can be adjusted by sliding the first blocking member 51 and the second blocking member 52.

[0100] In another embodiment, more, such as five, six, or other numbers of, blocking elements may be provided, with each blocking element forming a polygonal channel. For example, five blocking elements together form a pentagonal channel, and six blocking elements together form a hexagonal channel. Each blocking element can slide in a set direction to adjust the irradiation direction and irradiation range of the ray.

[0101] Furthermore, the X-ray imaging system also includes a support arm 20;

[0102] The support arm 20 can rotate around a set center point;

[0103] The radiation detector 10 is mounted on the support arm 20 at an adjustable angle so that the orientation of the radiation receiving surface 11 is adjustable.

[0104] The radiation generator 30 is mounted on the support arm 20 and is used to irradiate the radiation emitted by the radiation generator 30 onto the radiation receiving surface 11.

[0105] The radiation detector 10 and the radiation generator 30 are arranged opposite to each other, such that during X-ray imaging, the radiation detector 10 and the radiation generator 30 are located on both sides of the subject.

[0106] Please refer to Figure 6 , Figure 7 and Figure 9 As shown, the X-ray imaging system is used in conjunction with the operating table 60. The support arm 20 is a conventional C-arm, which rotates around the center point of the detection area. This center point is the set center point. Since the C-arm can usually slide along the length of the operating table, the set center point will move accordingly when the support arm rotates. The installation method of the support arm 20 is existing technology, and the existing support arm structure can be directly used here, which will not be described in detail here. The X-ray detector 10 and the X-ray generator 30 can also be directly from existing equipment. The difference is that the installation method of the X-ray detector 10 is different. Specifically, it can be adjusted through a structure similar to a three-degree-of-freedom turntable or ball joint as described above.

[0107] The support arm is a C-arm. The X-ray detector 10 and the X-ray generator are respectively installed at both ends of the support arm and arranged opposite each other. The installation method of the X-ray detector 10 and the X-ray generator is as described above and will not be repeated here. The patient lies on the operating table. When the C-arm is positioned with the width of the operating table as the central axis, the maximum positioning angle is reached when the X-ray detector comes into contact with the patient. This application method is convenient for interventional surgery. However, the fixed installation of the X-ray detector 10 and the X-ray generator in conjunction with the support arm has a great limitation on interventional surgery. Therefore, by installing the X-ray detector 10 with an adjustable angle and the X-ray generator with an adjustable X-ray irradiation angle in conjunction with the support arm, the above limitations are improved, and the X-ray imaging system of this structure can be adapted to almost all interventional surgeries.

[0108] This embodiment also provides an X-ray imaging system adjustment method, including:

[0109] Adjust the angle of the radiation detector 10 relative to the radiation generator 30, thereby adjusting the orientation of the radiation receiving surface 11 of the radiation generator 30.

[0110] The specific adjustment method is as described above. Based on the different parts of the human body, the angle relationship between the X-ray and the X-ray receiving surface 11 is required to be different. For example, when performing X-ray imaging on the human breast, the X-ray and the X-ray receiving surface 11 are not perpendicular, but good imaging results can still be achieved. In this case, only the angle of the X-ray generator 30 needs to be adjusted. By adjusting the angle of the X-ray generator 30, obstacle avoidance can be achieved and a larger positioning angle can be achieved.

[0111] Furthermore, the adjustment method also includes: adjusting the ray detector 10;

[0112] The angle adjustment is adapted to the X-ray detector 10 to adjust the irradiation direction of the X-rays emitted by the X-ray generator 30 so that the irradiation direction of the X-rays is perpendicular to the X-ray receiving surface 11 of the X-ray detector 10.

[0113] As described above, the direction of radiation is adjusted based on the X-ray imaging of different parts of the human body. For example, when performing X-ray imaging on the heart of the patient during cardiac intervention surgery, the X-ray must be perpendicular to the X-ray receiving surface 11 to achieve good imaging results. In this case, the X-ray detector 10 needs to be adjusted. Thus, based on the adjustment of the X-ray detector 10, the X-ray imaging system can be adapted to almost all X-ray imaging requirements of interventional surgery.

[0114] Furthermore, the adjustment method also includes: adjusting the angle to adapt to the X-ray detector 10, adjusting the irradiation range of the X-rays emitted by the X-ray generator 30 so that the irradiation range of the X-rays is located within the X-ray receiving surface 11.

[0115] As described above, this adjustment method allows the irradiation range to match the radiation receiving surface 11. It also allows for adaptive adjustment of the position of the irradiation range. For example, during cardiac interventional surgery, the position of the corresponding irradiation range can be set at the edge of the radiation receiving surface 11 to meet the user's observation needs.

[0116] Furthermore, the adjustment methods also include:

[0117] Acquire illumination images;

[0118] Based on the irradiation direction and irradiation range of the radiation detector 10, the position of the irradiation range on the radiation receiving surface 11 is calculated; and

[0119] The irradiated image is cropped based on the position of the irradiation range on the ray receiving surface 11.

[0120] Once the angle parameters of the X-ray detector 10, the position parameters of the adjustment port, and the size parameters of the adjustment port are determined, the distance between the X-ray receiving surface 11 and the adjustment port is determined. Therefore, the irradiation range and position on the X-ray receiving surface 11 can be calculated, and the corresponding image can be cropped to obtain the commonly used size to meet the user's usage habits.

[0121] Please refer to Figure 7 Zhihe Figure 10 As shown, Figure 7 In this configuration, the X-ray detectors 10 are all large-sized structures. When the X-ray detector 10 is in the initial position of the support arm 20, axis b is the direction of X-ray illumination. At this time, the direction of axis b coincides with the line connecting the center points of both ends of the C-arm. The direction of X-ray illumination is determined by the positioning of the support arm 20. Figure 8 In this case, the irradiation direction is positioned with the width of the operating table as the axis, and the maximum positioning angle is 29°. The irradiation range is as follows: Figure 8 As shown;

[0122] refer to Figure 9 As shown, when the angle of the radiation detector 10 is adjusted, and the position and size of the radiation adjustment port 50 of the radiation generator 30 are adjusted, as... Figure 9At position b along the central axis, the irradiation direction of the ray is rotated counterclockwise. At this point, the irradiation direction does not actually coincide with the line connecting the center points of both ends of arm C. In other words, the irradiation direction is not entirely limited by the position of the support arm 20. This allows the maximum tilt angle of the irradiation direction to reach 37°, maintaining the same tilt angle as the small-sized ray detector 10. The irradiation range at this point is as follows: Figure 10 As shown;

[0123] Generally, the irradiation image is displayed on the host computer. The X-ray detector transmits the corresponding image to the host computer according to the cropping position, and then crops the image at this position separately to filter out useless effects.

[0124] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0125] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. An X-ray imaging system, characterized in that: Includes a radiation detector (10) and a radiation generator (30); The angle of the radiation detector (10) relative to the radiation generator (30) is adjustable. The radiation generator (30) is configured such that the irradiation direction of the radiation emitted by the radiation generator (30) is adapted to the angle adjustment of the radiation detector (10) so that the radiation irradiates the radiation receiving surface (11) of the radiation detector (10), and the irradiation range of the radiation emitted by the radiation generator is adjusted so that the irradiation range of the radiation is located at the edge within the radiation receiving surface (11). The X-ray imaging system also includes a support arm (20); the support arm (20) is rotatable around a set center point; the radiation detector (10) is mounted on the support arm (20) at an adjustable angle so that the orientation of the radiation receiving surface (11) is adjustable; the radiation generator (30) is mounted on the support arm (20) for irradiating the radiation emitted by the radiation generator (30) onto the radiation receiving surface (11).

2. The X-ray imaging system as described in claim 1, characterized in that: The ray detector (10) can be adjusted in a set direction with its installation point as the center.

3. The X-ray imaging system as described in claim 1, characterized in that: The radiation generator (30) includes a radiation adjustment port (50) for allowing the radiation to pass through in order to adjust the irradiation direction of the radiation. At least one of the orientation, position and size of the radiation adjustment port (50) is adjustable to adjust the irradiation direction of the radiation.

4. The X-ray imaging system as described in claim 3, characterized in that: The radiation adjustment port (50) is also used to adjust the irradiation range of the radiation.

5. The X-ray imaging system as described in claim 3, characterized in that: The radiation adjustment port (50) includes at least two blocking members, which together form a channel for the radiation to pass through. The position and size of the channel are adjusted based on the relative movement of the blocking members. The irradiation direction and the irradiation range are adjusted based on the position and size of the channel.

6. A method for adjusting an X-ray imaging system, characterized in that... include: The X-ray imaging system includes a radiation detector (10), a support arm (20), and a radiation generator (30); the support arm (20) is rotatable around a set center point; the radiation detector (10) is mounted on the support arm (20) at an adjustable angle so that the orientation of the radiation receiving surface (11) is adjustable; the radiation generator (30) is mounted on the support arm (20) and is used to irradiate the radiation receiving surface (11) with the radiation emitted by the radiation generator (30); Adjust the angle of the ray detector (10) relative to the ray generator (30), thereby adjusting the orientation of the ray receiving surface (11) of the ray generator (30); The angle of the radiation detector (10) is adjusted to adjust the irradiation direction of the radiation emitted by the radiation generator (30) so that the irradiation direction of the radiation is perpendicular to the radiation receiving surface (11) of the radiation detector (10). The irradiation range of the radiation emitted by the radiation generator is adjusted so that the irradiation range of the radiation is located at the edge of the radiation receiving surface (11).

7. The X-ray imaging system adjustment method as described in claim 6, characterized in that... Also includes: Acquire illumination images; Based on the irradiation direction and irradiation range of the radiation detector (10), the position of the irradiation range on the radiation receiving surface (11) is calculated; and The irradiated image is cropped based on the position of the irradiation range on the ray receiving surface (11).

Images