X-ray tube filament preheating method and handheld x-ray imaging device

Abstract

The present application relates to the technical field of medical equipment, and discloses an X-ray tube filament preheating method and a handheld X-ray image device, the method comprising: determining the shortest preheating time of the X-ray tube filament; determining the working filament current corresponding to the set working tube voltage and working tube current according to a parameter reference table; controlling the X-ray tube filament, responding to the preset amplification multiple of the working filament current, and lasting the shortest preheating time, so that the tube voltage of the X-ray tube filament reaches the tube voltage expected value, and the tube current reaches the tube current expected value; when the tube voltage of the X-ray tube filament reaches the tube voltage expected value, and the tube current reaches the tube current expected value, loading the working tube voltage and working tube current to control the X-ray image device to expose; after the exposure of the X-ray image device ends, stopping heating the X-ray tube filament. The present application not only realizes fast preheating in advance, improves the exposure efficiency, but also reduces power consumption and improves the service life of the X-ray tube.

Description

Technical Field

[0001] This invention relates to the field of medical equipment technology, specifically to a method for preheating X-ray tube filaments and a handheld X-ray imaging device. Background Technology

[0002] X-ray imaging equipment, as a medical device, is typically used to examine internal images of the body, such as bones and organs. With the rapid development of X-ray imaging equipment, miniaturized and portable X-ray imaging devices have diversified their applications, finding widespread use in outdoor DR, field DR, mobile DR, and handheld tablet presses. Especially in applications where mains power is unavailable, portable X-ray imaging equipment is essential.

[0003] For some X-ray imaging devices, taking handheld X-ray imaging devices powered by lithium batteries as an example, they mainly consist of units such as batteries, control devices, high-voltage components, and X-ray tubes. The overall battery life and weight are mutually constrained, resulting in a limited battery life. Therefore, reducing the power consumption of handheld X-ray imaging devices to extend their overall battery life is crucial.

[0004] However, the inventors discovered that existing portable X-ray imaging equipment begins preheating the X-ray tube filament as soon as the equipment starts operating, and keeps the filament hot until the equipment stops. This not only results in excessively long preheating times and high power consumption, but also reduces the lifespan of the X-ray tube filament. Summary of the Invention

[0005] In view of this, the present invention provides an X-ray tube filament preheating method and a handheld X-ray imaging device to solve the problem of excessively long X-ray tube filament preheating time and resulting power consumption.

[0006] In a first aspect, the present invention provides a method for preheating the filament of an X-ray tube, comprising:

[0007] Determine the minimum preheating time for the X-ray tube filament;

[0008] Based on the pre-established parameter comparison table, determine the working filament current corresponding to the set working tube voltage and working tube current;

[0009] The X-ray tube filament is controlled to respond to the preset amplification factor of the working filament current and to maintain the shortest preheating time, so that the tube voltage of the X-ray tube filament reaches the expected tube voltage value and the tube current reaches the expected tube current value.

[0010] When the tube voltage and tube current of the X-ray tube filament reach the expected values, the working tube voltage and working tube current are applied to control the X-ray imaging equipment to perform exposure.

[0011] After the exposure of the X-ray imaging device is completed, the heating of the X-ray tube filament is stopped.

[0012] The preheating can be quickly realized, and the preheating time is fast, only the time of the phase difference value of the tube current and the filament current is needed, and the preheating can be completed. The fast response of exposure is further realized, and the waiting time of the patient is reduced. After completing the exposure once, the preheating of the X-ray tube can be stopped until the next exposure operation is performed. For some movable X-ray imaging devices or fixed X-ray imaging devices, the power consumption is reduced, and the service life of the X-ray tube is improved.

[0013] In an optional embodiment, the parameter reference table is established by the following steps:

[0014] A plurality of to-be-tested tube voltages and a plurality of to-be-tested filament currents are obtained;

[0015] According to the to-be-tested tube voltage and the to-be-tested filament current, the X-ray imaging device is controlled to perform exposure, and a test tube current corresponding to the to-be-tested tube voltage and the to-be-tested filament current is determined, wherein each to-be-tested tube voltage is tested with a plurality of to-be-tested filament currents;

[0016] According to the one-to-one correspondence relationship among the to-be-tested tube voltage, the to-be-tested filament current and the test tube current, an initial parameter reference table is established,

[0017] According to the initial parameter reference table, a fitting curve corresponding to each to-be-tested tube voltage is determined, and the fitting curve is a relationship curve between the to-be-tested filament current and the test tube current;

[0018] According to each fitting curve, a parameter reference table is established.

[0019] According to the pre-established parameter reference table, the working filament current corresponding to the set working tube voltage and the working tube current can be directly found, and the efficiency is high. The X-ray tube filament can be preheated by using the working filament current, so that the tube voltage and the tube current of the X-ray tube filament can reach the expected value in advance, thereby facilitating the subsequent loading of the working tube voltage and the working tube current, and realizing the fast preheating.

[0020] In an optional embodiment, the shortest preheating time of the X-ray tube filament is determined, including:

[0021] When the X-ray imaging device is controlled to perform exposure, the to-be-tested filament current and the response waveform of the test tube current corresponding to the to-be-tested filament current are obtained;

[0022] The phase difference value between the to-be-tested filament current and the test tube current is determined, and the phase difference value is taken as the shortest preheating time.

[0023] The phase difference value between the filament current and the tube current is taken as the shortest preheating time, and the shortest preheating time is used for the preheating time of the X-ray tube, so that the fast preheating of the X-ray tube is realized, and the effective tube current is ensured. Further, the stability and consistency of the X-ray output are ensured, and the quality of the X-ray imaging is ensured.

[0024] In an alternative embodiment, the tube voltage expectation value is the working tube voltage, and the tube current expectation value is the working tube current.

[0025] Alternatively, the tube voltage expectation value is greater than the working tube voltage, and the tube current expectation value is greater than the working tube current.

[0026] In a second aspect, the present application provides a handheld X-ray imaging device, comprising:

[0027] a battery module;

[0028] a control module connected with the battery module, used for executing the X-ray tube filament preheating method in any of the above embodiments;

[0029] a high-voltage assembly comprising a transformer and an X-ray tube, one side of the transformer being connected with the control module, and the other side being connected with the X-ray tube, the transformer being used for converting the power output by the battery module into a filament current, a tube voltage and a tube current.

[0030] In an alternative embodiment, the control module comprises:

[0031] a determination unit used for determining the shortest preheating time of the X-ray tube filament, and further used for determining the working filament current corresponding to the working tube voltage and the working tube current according to a pre-established parameter reference table;

[0032] a filament control unit used for controlling the X-ray tube filament, responding to the preset amplification multiple of the working filament current, and lasting the shortest preheating time, so that the tube voltage of the X-ray tube filament reaches the tube voltage expectation value, and the tube current reaches the tube current expectation value, and further used for controlling the X-ray tube filament to stop heating after the exposure of the X-ray imaging device ends;

[0033] a main inverter control unit used for loading the working tube voltage and the working tube current to control the X-ray imaging device to perform exposure when the tube voltage of the X-ray tube filament reaches the tube voltage expectation value, and the tube current reaches the tube current expectation value;

[0034] a control protection unit connected with the main inverter control unit and the filament control unit respectively.

[0035] In a third aspect, the present application provides a computer device, comprising: a memory and a processor, which are connected with each other in communication, and the memory stores computer instructions, and the processor executes the X-ray tube filament preheating method of the first aspect or any of the corresponding embodiments by executing the computer instructions.

[0036] In a fourth aspect, the present application provides a computer readable storage medium, which stores computer instructions for making a computer execute the X-ray tube filament preheating method of the first aspect or any of the corresponding embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the specific embodiments or prior art technical solutions of the present application, the drawings needed in the specific embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0038] Figure 1 is a flowchart of the X-ray tube filament preheating method according to the embodiment of the present application;

[0039] Figure 2 is an exposure timing diagram according to the embodiment of the present application;

[0040] Figure 3 is a flowchart of establishing a parameter reference table according to the embodiment of the present application;

[0041] Figure 4 is a curve diagram for determining the shortest preheating time according to the embodiment of the present application;

[0042] Figure 5 is a structural block diagram of a handheld X-ray imaging device according to the embodiment of the present application;

[0043] Figure 6 is a hardware structure diagram of the computer device according to the embodiment of the present application. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0045] When using an X-ray imaging device to expose, the X-ray tube filament needs to be preheated before exposure to increase the temperature of the filament and cathode to reach the energy required for emitting electrons. In some technologies, the X-ray tube filament is preheated when the X-ray imaging device is started, and the X-ray tube filament is kept in a hot state, even after a single exposure is completed. Especially for some mobile X-ray imaging devices, the X-ray tube filament is kept in a heated state for a long time, which not only causes unnecessary power consumption, but also reduces the service life of the X-ray tube filament. And in some technologies, preheating often takes more than a minute, and the preheating efficiency is low.

[0046] In view of this, according to an embodiment of the present application, an X-ray tube filament preheating method is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from here.

[0047] In this embodiment, an X-ray tube filament preheating method is provided, which can be used in controllers, servers and terminal devices in X-ray imaging devices, Figure 1 The flowchart of the X-ray tube filament preheating method according to an embodiment of the present application is shown in FIG. 1, which includes the following steps: Figure 1 As shown in FIG. 1, the flowchart includes the following steps:

[0048] Step S101, determine the shortest preheating time of the X-ray tube filament.

[0049] During the preheating of the X-ray tube filament, there is a time delay between the filament current and the tube current, that is, the tube current lags behind the filament current. Specifically, when the filament current starts to flow, the filament starts to heat up, and the electrons start to emit from the X-ray tube cathode. After a certain period of time, the electrons will have enough energy to pass through the gap of the X-ray tube and reach the anode, at which time the tube current will start to flow. Therefore, the tube current lags behind the filament current. In this embodiment, the response waveform of the tube current and the filament current after the exposure signal is valid can be collected according to experimental tests, so that the phase difference between the filament current and the tube current can be determined, and the phase difference is taken as the shortest preheating time.

[0050] Step S102, according to the pre-established parameter comparison table, determine the working filament current corresponding to the set working tube voltage and working tube current.

[0051] The parameter reference table can be obtained according to the previous experimental test, and the parameter reference table includes a one-to-one correspondence relationship between the tube voltage, the tube current and the filament current. The corresponding working filament current can be found according to the working tube voltage and the working tube current set by the user. The user can determine the required dose for exposure according to the set working tube voltage and working tube current.

[0052] In step S103, the X-ray tube filament is controlled to respond to the preset amplification multiple of the working filament current, and the minimum preheating time is continued, so that the tube voltage of the X-ray tube filament reaches the tube voltage expected value, and the tube current reaches the tube current expected value.

[0053] After the working filament current is determined, the preset amplification multiple of the working filament current is loaded on the X-ray tube filament, and the minimum preheating time is continued. It should be noted that the preset amplification multiple is also obtained by previous test. According to the preset amplification multiple, the tube voltage of the X-ray tube filament can reach the tube voltage expected value, and the tube current can reach the tube current expected value in the minimum preheating time. During the process of loading the preset amplification multiple of the working filament current, the X-ray tube filament is preheated, and after the minimum preheating time is continued, the X-ray tube filament reaches the best preheating state.

[0054] In step S104, when the tube voltage of the X-ray tube filament reaches the tube voltage expected value and the tube current reaches the tube current expected value, the working tube voltage and the working tube current are loaded to control the X-ray imaging device to perform exposure.

[0055] After the X-ray tube filament reaches the best preheating state, the X-ray imaging device can be controlled to perform exposure operation, that is, the actual required working tube voltage and working tube current are applied, so that the X-ray imaging device reaches the required dose for tube explosion, and normal exposure is realized.

[0056] In step S105, after the exposure of the X-ray imaging device is completed, the heating of the X-ray tube filament is stopped.

[0057] In this embodiment, from the exposure signal sent by pressing the hand brake to the stable tube current, only 150ms is needed, which is shorter than some technologies. The time from the effective exposure signal to the stable tube current is reduced from about 1 second to milliseconds, the exposure efficiency is improved, and only preheating is needed before the exposure operation is performed. After the exposure operation is completed, the preheating can be stopped until the next exposure starts, and the preheating does not need to be continued all the time.

[0058] It should be noted that in the actual operation of the X-ray imaging device, the user only needs to set the tube voltage and tube current corresponding to the required exposure dose, and the filament current is not a parameter directly set by the user. In the embodiment, the working filament current corresponding to the working tube voltage and working tube current set by the user is determined first, the X-ray tube filament is preheated in advance according to the exposure dose desired by the user, and after the shortest preheating time, the X-ray tube is loaded with the working tube voltage and working tube current actually set by the user, and exposure is started. In this way, preheating can be quickly realized, and the preheating time is fast, only the phase difference between the tube current and the filament current is needed, and the preheating can be completed. Further, the exposure is quickly responsive, and the waiting time of the patient is reduced. In the embodiment, after one exposure is completed, the preheating of the X-ray tube can be stopped until the next exposure operation is performed. For some movable X-ray imaging devices or fixed X-ray imaging devices, the power consumption is reduced, and the service life of the X-ray tube is improved.

[0059] As shown in Figure 2 , an exposure timing diagram provided in the embodiment is shown. After the exposure signal is valid, the filament current starts to be valid, after the shortest preheating time, the working tube voltage and the working tube current start to respond, and at this time, the preheated filament current decreases to the filament current value corresponding to the working tube voltage and the working tube current, and the subsequent filament current, working tube voltage and working tube current start to be stable. After exposure, the filament current does not continue to heat.

[0060] As shown in Figure 3 , in some optional embodiments, the parameter comparison table can be established by the following steps:

[0061] Step S201, a plurality of to-be-tested tube voltages and a plurality of to-be-tested filament currents are obtained;

[0062] Step S202, according to the to-be-tested tube voltage and the to-be-tested filament current, the X-ray imaging device is controlled to perform exposure, so as to determine the test tube current corresponding to the to-be-tested tube voltage and the to-be-tested filament current, wherein each to-be-tested tube voltage is tested with a plurality of to-be-tested filament currents;

[0063] Step S203, according to the one-to-one correspondence relationship among the to-be-tested tube voltage, the to-be-tested filament current and the test tube current, the parameter comparison table is established;

[0064] Step S204, according to the initial parameter comparison table, a fitting curve corresponding to each to-be-tested tube voltage is determined, and the fitting curve is a relationship curve between the to-be-tested filament current and the test tube current;

[0065] Step S205: Establish the parameter comparison table based on each of the fitted curves.

[0066] Specifically, multiple test tube voltages and filament currents can be preset. During the experiment, one test tube voltage and one test filament current can be selected as inputs to the X-ray imaging equipment. The equipment is then used to control the exposure, and the tube current during the exposure process is obtained. This tube current is the test tube current corresponding to the test tube voltage and the test filament current. Further, the test filament current or the test tube voltage is changed, and the above steps are repeated to determine the test tube current corresponding to each test tube voltage and each test filament current, and an initial parameter lookup table is established. Further, a fitting curve can be obtained based on this initial parameter lookup table, corresponding one-to-one with the test tube voltage. Based on this fitting curve, the test tube current corresponding to any test tube voltage and any test filament current can be determined, and a parameter lookup table can be established based on each fitting curve.

[0067] In this embodiment, the working filament current corresponding to the set working tube voltage and current can be directly found according to a pre-established parameter lookup table, which is highly efficient. This working filament current can be used to preheat the X-ray tube filament, ensuring that the tube voltage and current reach the desired values ​​beforehand. This facilitates the subsequent loading of the working tube voltage and current, achieving rapid preheating.

[0068] In some alternative implementations, determining the minimum preheating time of the X-ray tube filament includes:

[0069] When controlling the X-ray imaging equipment to perform exposure, the response waveforms of the filament current to be tested and the test tube current corresponding to the filament current to be tested are acquired;

[0070] Determine the phase difference between the filament current to be tested and the test tube current, and use the phase difference as the shortest preheating time.

[0071] like Figure 4 As shown, the horizontal axis represents time t, the vertical axis represents amplitude, waveform a represents the filament current under test, and waveform b represents the tube current under test. Δt represents the phase difference. The tube voltage can be fixed, and the filament current can be adjusted periodically, such as with a sine wave or a triangular wave. The waveforms of the filament current and the tube current are monitored simultaneously using an oscilloscope. The response times of the filament current and the tube current are determined based on the response waveforms, and the phase difference Δt between the two waveforms is measured.

[0072] In the embodiment, the phase difference value between the filament current and the tube current is taken as the shortest preheating time, and the shortest preheating time is used for the preheating time of the X-ray tube. The X-ray tube can be preheated quickly, and the tube current is effective. Further, the stability and consistency of the X-ray output are ensured, and the quality of the X-ray imaging is ensured.

[0073] In some optional embodiments, the tube voltage expectation value is the working tube voltage, and the tube current expectation value is the working tube current.

[0074] Or, the tube voltage expectation value is greater than the working tube voltage, and the tube current expectation value is greater than the working tube current.

[0075] After the shortest preheating time, the tube voltage and the tube current corresponding to the filament of the X-ray tube can be higher than the working tube voltage and the working tube current to be loaded. When the working tube voltage and the working tube current are actually loaded, the working tube voltage and the working tube current can be directly loaded, and the required dose for exposure can be achieved.

[0076] The filament current after preheating can be higher than the filament current during actual work. When the working tube voltage and the working tube current are loaded, the filament current after preheating decreases to the filament current corresponding to the working tube voltage and the working tube current. Thus, short-time preheating is achieved, and the required dose for exposure is achieved, fast exposure is achieved, and the problem of reduced service life due to long-term heat of the X-ray tube does not occur.

[0077] In the embodiment, a handheld X-ray imaging device is provided, which can be used to execute the X-ray tube filament preheating method described above, Figure 5 is a structural schematic diagram of the handheld X-ray imaging device according to the embodiment of the application, as Figure 5 shown, the handheld X-ray imaging device includes:

[0078] a battery module 301;

[0079] a control module 302 connected with the battery module 301, used to execute the X-ray tube filament preheating method described in any one of the embodiments;

[0080] a high-voltage assembly 303 including a transformer 3031 and an X-ray tube 3032, one side of the transformer 3031 being connected with the control module 302, and the other side being connected with the X-ray tube 3032, the transformer 3031 being used to convert the power output by the battery module 301 into a filament current, a tube voltage, and a tube current.

[0081] In some optional embodiments, the control module 302 includes:

[0082] The determining unit 3021 is configured to determine a shortest preheating time of the X-ray tube filament; and determine a working filament current corresponding to the set working tube voltage and working tube current according to a pre-established parameter comparison table.

[0083] The filament control unit 3022 is configured to control the X-ray tube filament to reach a tube voltage expected value and a tube current expected value by amplifying the working filament current by a preset amplification multiple and maintaining the shortest preheating time; and control the X-ray tube filament to stop heating after the exposure of the X-ray imaging device is completed.

[0084] The main inverter control unit 3023 is configured to load the working tube voltage and the working tube current to control the X-ray imaging device to perform exposure when the tube voltage of the X-ray tube filament reaches the tube voltage expected value and the tube current reaches the tube current expected value.

[0085] The control protection unit 3024 is connected with the main inverter control unit 3023 and the filament control unit 3022 respectively.

[0086] The control module 302 further comprises an external interface 3025 connected with the control protection unit 3024, and configured to realize data transmission.

[0087] The hand-held X-ray imaging device provided by the embodiment can quickly realize preheating, the preheating time is fast, the exposure response is fast, and the waiting time of the patient is reduced. After one exposure is completed, the X-ray tube can be stopped from preheating until the next exposure operation is performed, the power consumption is reduced, and the service life of the X-ray tube is prolonged.

[0088] For related content of the control module, please refer to the detailed description of the control module in the above embodiment. Figure 1 The X-ray tube filament preheating method of the embodiment is not repeated here.

[0089] The control module is used to realize the above embodiment and preferred embodiment, and the description is not repeated. As used below, the term "module" or "unit" can be a combination of software and / or hardware that realizes a predetermined function. Although the device described in the above embodiment is preferably realized by software, the realization of hardware or a combination of software and hardware is also possible and is conceived.

[0090] The control module in the embodiment is presented in the form of a functional unit, and the unit herein refers to an ASIC circuit, a processor and a memory executing one or more software or fixed programs, and / or other devices that can provide the above functions.

[0091] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0092] This invention also provides a computer device having the above-described features. Figure 6 The control module shown.

[0093] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 6 As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 6 Take a processor 10 as an example.

[0094] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0095] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0096] The memory 20 can include a program storage area and a data storage area. The program storage area can store an operating system and applications required by at least one function. The data storage area can store data created by the computer device according to the presentation of a small program landing page, and the like. In addition, the memory 20 can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some optional embodiments, the memory 20 can optionally include a memory disposed remotely relative to the processor 10, and these remote memories can be connected to the computer device through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0097] The memory 20 can include a volatile memory, such as a random access memory, and can also include a non-volatile memory, such as a flash memory, a hard disk, or a solid-state disk. The memory 20 can also include a combination of the above-mentioned kinds of memories.

[0098] The computer device further includes a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0099] The embodiments of the present application also provide a computer readable storage medium. The above-mentioned method according to the embodiments of the present application can be implemented in hardware, firmware, or recorded in a storage medium, or stored in a remote storage medium or a non-transitory machine readable storage medium through network downloading and stored in a local storage medium, so that the method described herein can be processed by such software on a storage medium using a general-purpose computer, a special-purpose processor, or programmable or special-purpose hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid-state disk, and the like. Further, the storage medium can also include a combination of the above-mentioned kinds of memories. It can be understood that the computer, the processor, the microprocessor controller, or the programmable hardware includes a storage component that can store or receive software or computer code, and when the software or computer code is accessed and executed by the computer, the processor, or the hardware, the method shown in the above embodiments is implemented.

[0100] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. An X-ray tube filament preheating method, characterized by, The method comprises: determining the shortest preheating time of the X-ray tube filament; determining the working filament current corresponding to the set working tube voltage and working tube current according to a pre-established parameter reference table; controlling the X-ray tube filament to reach the tube voltage expected value and the tube current expected value in response to the preset amplification multiple of the working filament current and for the shortest preheating time; loading the working tube voltage and the working tube current to control the X-ray imaging device to expose after the tube voltage of the X-ray tube filament reaches the tube voltage expected value and the tube current reaches the tube current expected value; stopping heating the X-ray tube filament after the X-ray imaging device exposure ends; wherein the parameter reference table is established by the following steps: obtaining a plurality of test tube voltages and a plurality of test filament currents; controlling the X-ray imaging device to expose according to the test tube voltage and the test filament current to determine the test tube current corresponding to the test tube voltage and the test filament current, wherein each test tube voltage is tested with a plurality of test filament currents; establishing an initial parameter reference table according to the one-to-one correspondence between the test tube voltage, the test filament current, and the test tube current; determining a fitting curve corresponding to each test tube voltage according to the initial parameter reference table, wherein the fitting curve is the relationship curve between the test filament current and the test tube current; establishing the parameter reference table according to each fitting curve; The determination of the shortest preheating time of the X-ray tube filament comprises: obtaining the response waveform of the test filament current and the test tube current corresponding to the test filament current when controlling the X-ray imaging device to expose; determining the phase difference value between the test filament current and the test tube current, and taking the phase difference value as the shortest preheating time.

2. The method of claim 1, wherein, The tube voltage expected value is the working tube voltage, and the tube current expected value is the working tube current. Or, the tube voltage expected value is greater than the working tube voltage, and the tube current expected value is greater than the working tube current.

3. A hand-held x-ray imaging device, characterized in that It comprises: a battery module; a control module connected with the battery module, used for executing the X-ray tube filament preheating method in any one of claims 1-2; a high-voltage assembly comprising a transformer and an X-ray tube, one side of the transformer being connected with the control module, the other side being connected with the X-ray tube, and the transformer being used for converting the power output by the battery module into a filament current, a tube voltage, and a tube current.

4. The handheld x-ray imaging device of claim 3, wherein, The control module comprises: a determination unit for determining the shortest preheating time of the X-ray tube filament, and further for determining the working filament current corresponding to the set working tube voltage and working tube current according to a pre-established parameter reference table; A filament control unit is configured to control the X-ray tube filament in response to a preset amplification multiple of the working filament current and for a shortest preheating time, so that a tube voltage of the X-ray tube filament reaches a tube voltage expectation value and a tube current reaches a tube current expectation value; and to control the X-ray tube filament to stop heating after exposure of the X-ray imaging device. A main inverter control unit is configured to load the working tube voltage and the working tube current to control the X-ray imaging device to expose when the tube voltage of the X-ray tube filament reaches the tube voltage expectation value and the tube current reaches the tube current expectation value. A control protection unit is connected with the main inverter control unit and the filament control unit respectively.

5. A computer device, comprising: The memory and the processor are connected with each other in communication, the memory stores computer instructions, and the processor executes the computer instructions to perform the X-ray tube filament preheating method of any one of claims 1-2. The computer readable storage medium stores computer instructions for causing the computer to perform the X-ray tube filament preheating method of any one of claims 1-2.

6. A computer-readable storage medium, characterized in that, ​

Images