Method and system for enlarging imaging view of X-ray machine

Abstract

The invention discloses a method and a system for enlarging an imaging visual field of an X-ray machine. The method comprises the following steps: presetting a moving path of the X-ray machine; the X-ray machine is controlled to move to the current position and the next adjacent position along the moving path for exposure so as to obtain exposure images of the corresponding positions, and the obtained exposure images are stored in a picture library; the position relation between the current position and the adjacent next position meets y = ax / b, in the formula, y represents the horizontal distance between the current position and the adjacent next position, x represents the vertical distance between the position of a trundle of an electric chassis in the X-ray machine and the position of a sickbed, a represents the imaging field width of a normal position detector in the X-ray machine, and b represents the imaging field width of a normal position detector in the X-ray machine. B represents the vertical distance between the position of the trundle and the position of the normal position detector; and splicing the selected exposure images in the picture library.

Description

Technical Field

[0001] The present invention relates to the field of image imaging technology, and in particular to a method and system for increasing the imaging field of an X-ray machine. Background Art

[0002] There are two main ways to increase the imaging field of view of existing mobile X-ray machines: First, when the distance SID between the flat-panel detector end and the tube end cannot be adjusted, a larger flat-panel detector is used to increase the imaging range and resolution. Second, when the distance SID between the flat-panel detector end and the tube end is adjustable, adjusting the SID to the maximum can increase the imaging range of the flat-panel detector; adjusting the SID to the minimum can improve the image resolution and make the image clearer; and when a larger range of images is needed, the X-ray machine needs to be manually moved to an approximate position to take multiple continuous shots for observation and diagnosis. However, the imaging range of these two methods is limited and will increase the X-ray dose received by the patient. In addition, the use of a larger flat-panel detector in method one is expensive and costly, and method two requires the addition of a floating structure, which makes the entire machine heavy and inconvenient to move. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, the present invention proposes a method and system for increasing the imaging field of view of an X-ray machine. By precisely controlling the moving position of the X-ray machine and exposing the X-ray machine after it moves to its proper position, the imaging range of the X-ray machine can be effectively increased and the X-ray dose received by the patient can be reduced to a certain extent.

[0005] According to a first aspect of the present application, a method for increasing the imaging field of view of an X-ray machine is provided, comprising:

[0006] Preset the movement path of the X-ray machine;

[0007] Control the X-ray machine to move to the current position and the next adjacent position along the moving path respectively to perform exposure to obtain exposure images of the corresponding positions, and store the obtained exposure images in a picture library; the positional relationship between the current position and the next adjacent position satisfies y=ax / b, where y represents the horizontal distance between the current position and the next adjacent position, x represents the vertical distance between the position of the caster of the electric chassis in the X-ray machine and the position of the bed, a represents the imaging field width of the positive detector in the X-ray machine, and b represents the vertical distance between the position of the caster and the position of the positive detector;

[0008] The selected exposure images in the image library are stitched.

[0009] In the above method, the moving path is a straight line movement of the X-ray machine along one side of the length direction of the bed.

[0010] In the above method, the X-ray machine exposes one image every time it moves a unit length, so that two adjacent images overlap.

[0011] In the above method, one of the unit lengths is the maximum pixel of the positive position detector.

[0012] According to a second aspect of the present application, a system for increasing the imaging field of view of an X-ray machine is provided, comprising:

[0013] X-ray machine;

[0014] A controller is electrically connected to the X-ray machine, and is used to pre-set a moving path of the X-ray machine, and control the X-ray machine to move along the moving path to a current position and an adjacent next position for exposure to obtain exposure images of corresponding positions, and store the obtained exposure images in a picture library; and is used to splice the selected exposure images in the picture library; the positional relationship between the current position and the adjacent next position satisfies y=ax / b, where y represents the horizontal distance between the current position and the adjacent next position, x represents the vertical distance between the position of the caster of the electric chassis in the X-ray machine and the position of the bed, a represents the imaging field width of the positive detector in the X-ray machine, and b represents the vertical distance between the position of the caster and the position of the positive detector.

[0015] In the above system, the caster adopts a servo hub motor, and the servo hub motor is electrically connected to the controller.

[0016] In the above system, the rotation speed and output torque of the servo hub motor are closed-loop controlled by the controller.

[0017] In the above system, when the X-ray machine encounters resistance while moving along the moving path, the output torque of the servo hub motor will gradually increase to an alarm range, and the controller controls the servo hub motor to stop.

[0018] According to a third aspect of the present application, a terminal is provided, comprising a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor executes any one of the above-mentioned methods for increasing the imaging field of view of an X-ray machine when running the computer program.

[0019] According to a fourth aspect of the present application, a computer-readable storage medium is provided, which includes a stored computer program, wherein when the computer program is executed by a processor, the terminal where the storage medium is located is controlled to execute any of the above-mentioned methods for increasing the imaging field of view of an X-ray machine.

[0020] According to the technical solution provided by the present application, at least the following beneficial effects are achieved: the moving path of the X-ray machine is preset, the X-ray machine moves along the specified moving path, and two adjacent positions during exposure satisfy a certain relationship, thereby ensuring the integrity of the image after splicing after exposure. By using the method and system in the above technical solution, the moving position of the X-ray machine can be accurately controlled, and the X-ray machine can be exposed after it moves to the right position, which can effectively increase the imaging range of the X-ray machine and reduce the X-ray dose received by the patient to a certain extent.

[0021] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0023] Figure 1 An application scenario diagram of the method for increasing the imaging field of view of an X-ray machine provided in an embodiment of the present application;

[0024] Figure 2 A simplified diagram of the relationship between the current position and the next position in the large-scale imaging provided by the embodiment of the present application;

[0025] Figure 3 A schematic diagram of the caster position, bed position and upright detector position provided in an embodiment of the present application;

[0026] Figure 4 A schematic diagram of the current position and the next position provided in an embodiment of the present application;

[0027] Figure 5 A diagram of a large-scale imaging process provided by an embodiment of the present application;

[0028] Figure 6 A diagram of the imaging process of a designated position provided in an embodiment of the present application;

[0029] Figure 7 This is a simplified diagram of the relationship between the moving distance of the whole machine and the imaging field width of the positive position detector during the imaging process of the specified position provided in the embodiment of the present application. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0031] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, not to describe a specific order or sequence.

[0032] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0033] First, a specific application scenario of an embodiment of the present application is described.

[0034] Figure 1 The figure shows an X-ray machine with a dual-path imaging chain, including an anteroposterior tube, an anteroposterior detector, a lateral tube and a lateral detector, the connecting axis of the anteroposterior tube and the anteroposterior detector is arranged orthogonally to the connecting axis of the lateral tube and the lateral detector, the X-rays generated by the anteroposterior tube pass through the anteroposterior position of the human body and are received by the anteroposterior detector to form an anteroposterior imaging chain, and the X-rays generated by the lateral tube pass through the lateral position of the human body and are received by the lateral detector to form a lateral imaging chain. In the present application, the length direction of the bed is taken as the X-axis, the direction perpendicular to the bed is taken as the Y-axis, and the X-ray machine moves horizontally along the X-axis direction.

[0035] exist Figure 1 Based on the application scenario shown, the first aspect of the present application provides a method for increasing the imaging field of view of an X-ray machine, the method comprising the following steps:

[0036] S110, pre-set the moving path of the X-ray machine.

[0037] In this step, the moving path of the X-ray machine is a straight line along one side of the length direction of the hospital bed, and moves in the order of the patient from head to toe or from toe to head to fully expose the patient's body parts.

[0038] S120, controlling the X-ray machine to move along the moving path to the current position and the next adjacent position for exposure to obtain corresponding exposure images, and storing the obtained exposure images in the image library; Figure 2 As shown, the positional relationship between the current position and the next adjacent position satisfies y=ax / b, where y represents the horizontal distance between the current position and the next adjacent position, x represents the vertical distance between the position of the caster of the electric chassis in the X-ray machine and the position of the bed, a represents the imaging field width of the positive detector in the X-ray machine, and b represents the vertical distance between the position of the caster and the position of the positive detector.

[0039] In this step, if Figure 3 As shown, the position of the caster refers to the lowest point where the caster contacts the ground, the position of the bed refers to the center of the bed, and the position of the upright detector refers to the lowest position of the upright detector screen panel toward the bed side.

[0040] In this step, if Figure 3 and Figure 4 As shown, the horizontal distance between the current position and the adjacent next position refers to the distance between the current position and the next position on the X-axis; the vertical distance between the position of the caster and the position of the bed refers to the distance between the position of the caster and the position of the bed on the Y-axis; the vertical distance between the position of the caster and the position of the positive position detector refers to the distance between the position of the caster and the position of the positive position detector on the Y-axis.

[0041] In this step, if Figure 2 and Figure 4 As shown, when the X-ray machine moves one unit length, it exposes an image, so that two adjacent images have a degree of overlap. In this application, one unit length is the maximum pixel of the positive detector.

[0042] S130: stitching the selected exposure images in the image library.

[0043] In this step, exposure images of the part requiring surgery are first selected from the image library, and then the selected exposure images are spliced ​​for easy preoperative observation.

[0044] The following is an embodiment of the device of the present application, which can be used to execute the embodiment of the method of the present application. For details not disclosed in the embodiment of the device of the present application, please refer to the embodiment of the method of the present invention.

[0045] The second embodiment of the present application provides a system for increasing the imaging field of view of an X-ray machine, the system includes a controller and an X-ray machine, the controller is electrically connected to the X-ray machine, and is used to pre-set the moving path of the X-ray machine, and control the X-ray machine to move to the current position and the next adjacent position along the preset moving path to expose to obtain the exposure image of the corresponding position, and store the acquired exposure image in the picture library; and is used to splice the selected exposure images in the picture library. The positional relationship between the current position and the next adjacent position satisfies y=ax / b, where y represents the horizontal distance between the current position and the next adjacent position, x represents the vertical distance between the position of the caster of the electric chassis in the X-ray machine and the position of the bed, a represents the imaging field width of the positive detector in the X-ray machine, and b represents the vertical distance between the position of the caster and the position of the positive detector.

[0046] In some specific embodiments of the present application, the casters of the electric chassis in the X-ray machine use servo hub motors, which integrate the motor, encoder, reducer, and wheel into one, and are both servo motors and walking wheels. The servo hub motor can realize the straight-line walking of the X-ray machine along one side of the length direction of the bed through steering, and ensure that the distance between the position of the positive detector and the position of the bed in the Y-axis direction remains unchanged during the movement, so as to realize the X-ray machine moving and exposing at the same time.

[0047] In some specific embodiments of the present application, the servo hub motor is electrically connected to the controller, and the encoder contained in the servo hub motor measures the actual state of the servo hub motor, such as the position state, speed state, torque state, etc., and feeds back this information to the controller. The controller receives the feedback signal provided by the encoder, compares it with the set value, and calculates the difference between the set value and the feedback signal as a new control signal to drive the servo hub motor. The servo hub motor controls the movement of the servo hub motor according to the signal instruction of the controller, so that the state of the servo hub motor gradually approaches the set value. This process is a continuous feedback loop. By continuously adjusting the control signal, the system can achieve high-precision position, speed or torque control.

[0048] In some specific embodiments of the present application, when the X-ray machine encounters resistance while moving along a moving path, the output torque of the servo hub motor will gradually increase to the alarm range, the controller will control the servo hub motor to stop, and prompt the operator of the X-ray machine with information about a possible collision.

[0049] The above-mentioned method and system for increasing the imaging field of view can realize large-scale imaging on the one hand, and the maximum range can support whole-body imaging; on the other hand, it can also realize designated position imaging. After large-scale imaging, any position can be designated for imaging according to the progress of the operation. This method can effectively improve the doctor's surgical work efficiency, save the doctor's time for repeated parameter adjustments (including repeatedly moving the X-ray machine to find the patient's disease location), and reduce the patient's X-ray dose.

[0050] Large-scale imaging processes such as Figure 5 As shown:

[0051] Movement setting: The controller controls the X-ray machine to "forward", "backward", "left" and "right" to set the movement path;

[0052] Motion pre-scan: The controller controls the X-ray machine to move along the moving path. If a collision occurs, the controller controls the X-ray machine to end the pre-scan and the X-ray machine returns to the starting point.

[0053] Image scanning: The controller controls the X-ray machine to move and expose along the moving path; after the exposure is completed, the images to be spliced ​​are selected in the image library for splicing.

[0054] After the large-scale imaging process is completed, the designated position imaging function can be used. The designated position imaging process is as follows: Figure 6 As shown:

[0055] Select the fluoroscopy position, and it will automatically zoom in. When the doctor presses the exposure button, the whole device will move to the designated position and perform exposure.

[0056] like Figure 7 As shown in the figure, the gray area in the figure represents the image overlap area when the X-ray machine is exposed at the current position and the next adjacent position, ID 1 、ID 2 、……ID max They represent the exposure images and are arranged in a predetermined order. The moving distance Y of the X-ray machine from the current position to the specified position satisfies:

[0057] Y=|ID end -ID start |·y

[0058] =|ID end -ID start |·(ax / b)

[0059] Where, ID end Indicates the exposure image of the X-ray machine at the specified position, ID start It represents the exposure image of the X-ray machine at the current position. The value range of end and start is 1 to max. y represents the horizontal distance between the current position and the next adjacent position. a represents the imaging field width of the positive detector. x represents the vertical distance between the position of the caster of the electric chassis of the X-ray machine and the position of the bed. b represents the vertical distance between the position of the caster and the position of the positive detector.

[0060] When the doctor selects the perspective position from the maximum range imaging, the distance Y that the X-ray machine needs to move, that is, the distance the casters move, can be calculated according to the above formula. 5 When the X-ray machine is currently located at ID 1 When the X-ray machine moves from the current position to the specified position, the distance it needs to move is Y = | ID 5 –ID 1 |·(ax / b)=|5-1|·(ax / b)=4·(ax / b).

[0061] An embodiment of the present application further provides a terminal including a memory and a processor, wherein the memory stores a computer program executable on the processor, and the processor executes the above-mentioned method of increasing the imaging field of view of an X-ray machine when running the computer program.

[0062] Specifically, the processor may be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of this application. The processor may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0063] Specifically, the processor is connected to the memory via a bus, and the bus may include a path for transmitting information. The bus may be a PCI bus or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc.

[0064] The memory can be a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, or an EEPROM, CD-ROM or other optical disk storage, optical disk storage (including compressed optical disk, laser disk, optical disk, digital versatile disk, Blu-ray disk, etc.), magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to this.

[0065] Optionally, the memory is used to store the computer program code for executing the solution of the present application, and the processor controls the execution. The processor is used to execute the application program code stored in the memory to implement the action of the system for increasing the imaging field of view of the X-ray machine.

[0066] An embodiment of the present application also provides a computer-readable storage medium, which includes a stored computer program, wherein when the computer program is executed by a processor, the terminal where the storage medium is located is controlled to execute the above-mentioned method for increasing the imaging field of view of an X-ray machine.

[0067] The device embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0068] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically embodies computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0069] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the present application. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A method for increasing the imaging field of view of an X-ray machine, It is characterized in that The following steps are involved: Preset the movement path of the X-ray machine; Control the X-ray machine to move to the current position and the next adjacent position along the moving path respectively to perform exposure to obtain exposure images of the corresponding positions, and store the obtained exposure images in a picture library; the positional relationship between the current position and the next adjacent position satisfies y=ax / b, where y represents the horizontal distance between the current position and the next adjacent position, x represents the vertical distance between the position of the caster of the electric chassis in the X-ray machine and the position of the bed, a represents the imaging field width of the positive detector in the X-ray machine, and b represents the vertical distance between the position of the caster and the position of the positive detector; The selected exposure images in the image library are stitched.

2. The method for increasing the imaging field of an X-ray machine according to claim 1, It is characterized in that The moving path is a straight line movement of the X-ray machine along one side of the length direction of the bed.

3. The method for increasing the imaging field of an X-ray machine according to claim 1, It is characterized in that The X-ray machine exposes one image every time it moves a unit length, so that two adjacent images overlap.

4. The method for increasing the imaging field of an X-ray machine according to claim 3, It is characterized in that One of the unit lengths is the maximum pixel of the positive detector.

5. A system for increasing the imaging field of view of an X-ray machine, It is characterized in that include: X-ray machine; A controller, electrically connected to the X-ray machine, for presetting a moving path of the X-ray machine, and controlling the X-ray machine to move to a current position and an adjacent next position along the moving path for exposure to acquire exposure images of corresponding positions, and storing the acquired exposure images in a picture library; And, used for stitching the selected exposure images in the image library; the positional relationship between the current position and the adjacent next position satisfies y=ax / b, wherein y represents the horizontal distance between the current position and the adjacent next position, x represents the vertical distance between the position of the caster of the electric chassis in the X-ray machine and the position of the bed, a represents the imaging field width of the positive detector in the X-ray machine, and b represents the vertical distance between the position of the caster and the position of the positive detector.

6. The system for increasing the imaging field of view of an X-ray machine according to claim 5, It is characterized in that The caster adopts a servo hub motor, and the servo hub motor is electrically connected to the controller.

7. The system for increasing the imaging field of view of an X-ray machine according to claim 6, It is characterized in that The rotation speed and output torque of the servo hub motor are closed-loop controlled by the controller.

8. The system for increasing the imaging field of view of an X-ray machine according to claim 7, It is characterized in that When the X-ray machine encounters resistance during movement along the moving path, the output torque of the servo hub motor will gradually increase to an alarm range, and the controller will control the servo hub motor to stop.

9. A terminal comprising a memory and a processor, wherein the memory stores a computer program that can be run on the processor, It is characterized in that When the processor runs the computer program, the method for increasing the imaging field of view of an X-ray machine according to any one of claims 1 to 4 is performed.

10. A computer-readable storage medium, It is characterized in that The computer-readable storage medium includes a stored computer program, wherein when the computer program is executed by a processor, the terminal where the storage medium is located is controlled to execute the method for increasing the imaging field of view of an X-ray machine as described in any one of claims 1 to 4.

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