CN117045266A - Method, device, X-ray machine, medium and product for controlling X-rays - Google Patents
Method, device, X-ray machine, medium and product for controlling X-rays Download PDFInfo
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Abstract
The present disclosure provides a method, an apparatus and an X-ray machine for controlling an X-ray machine. The method for controlling an X-ray machine comprises: determining the heat capacity consumed by the combined machine head based on a heat dissipation curve of the combined machine head and the heat dissipation energy of the combined machine head, wherein the heat dissipation curve is a curve which is obtained under the condition that the X-ray machine does not generate X-rays and is used for representing the heat dissipation capacity of the combined machine head; judging whether to set the combined head to a power limiting mode based on the heat capacity consumed by the combined head; and in response to the X-ray machine being in the power limiting mode, performing the following: determining a limiting power value of the combined machine head based on the heat dissipation curve of the combined machine head and the consumed heat capacity; and determining an upper limit value of a frame rate of the X-ray machine based on the exposure parameters of the combined machine head and the limit power value. The effective control of the heat capacity of the combined machine head is realized to avoid the excessive temperature of the combined machine head.
Description
Technical Field
The present disclosure relates to the technical field of medical devices, in particular to a method, an apparatus, an X-ray machine, a non-transitory computer readable storage medium and a computer program product for controlling an X-ray machine.
Background
Typically, an X-ray machine includes a combined handpiece to emit an X-ray beam to scan an object to be measured to obtain information, which is then processed by a computer to obtain a reconstructed image. Since the combined head generates a lot of heat during the emission of the X-ray beam by the combined head, the X-ray machine needs to be controlled to avoid excessive temperature of the combined head.
The approaches described in this section are not necessarily approaches that have been previously conceived or pursued. Unless otherwise indicated, it should not be assumed that any of the approaches described in this section qualify as prior art merely by virtue of their inclusion in this section. Similarly, the problems mentioned in this section should not be considered as having been recognized in any prior art unless otherwise indicated.
Disclosure of Invention
According to an aspect of the disclosed embodiments, there is provided a method for controlling an X-ray machine including a combined head, the method comprising: determining the heat capacity consumed by the combined machine head based on a heat dissipation curve of the combined machine head and the heat dissipation energy of the combined machine head, wherein the heat dissipation curve is a curve which is obtained under the condition that the X-ray machine does not generate X-rays and is used for representing the heat dissipation capacity of the combined machine head; judging whether to set the combined head to a power limiting mode based on the heat capacity consumed by the combined head; and in response to the X-ray machine being in the power limiting mode, performing the following: determining a limiting power of the combined hand piece based on the heat dissipation profile of the combined hand piece and the consumed heat capacity; and determining an upper limit value of a frame rate of the X-ray machine based on the exposure parameters and the limiting power of the combined machine head.
According to another aspect of the disclosed embodiments, there is provided an apparatus for controlling an X-ray machine including a combined machine head, the apparatus comprising: a heat capacity consumption determination unit configured to determine a heat capacity consumed by the combined head based on a heat radiation curve of the combined head and a heat radiation energy of the combined head, wherein the heat radiation curve is a curve characterizing a heat radiation capacity of the combined head acquired in a case where the X-ray machine does not generate X-rays; a mode setting unit configured to determine whether to set the combined head to a power limiting mode based on a heat capacity consumed by the combined head; and a frame rate determination unit configured to perform the following operations in response to the X-ray machine being in the power limiting mode: determining a limiting power of the combined hand piece based on the heat dissipation profile of the combined hand piece and the consumed heat capacity; and determining an upper limit value of a frame rate of the X-ray machine based on the exposure parameters and the limiting power of the combined machine head.
According to another aspect of the disclosed embodiments, there is provided an X-ray machine comprising: a combined machine head; and a controller configured to perform the method as described in the present disclosure.
According to another aspect of embodiments of the present disclosure, there is provided a non-transitory computer readable storage medium storing a computer program which, when executed by a processor, implements a method as described in the present disclosure.
According to another aspect of embodiments of the present disclosure, there is provided a computer program product comprising a computer program which, when executed by a processor, implements a method as described in the present disclosure.
According to the embodiment of the disclosure, the heat capacity of the combined machine head can be effectively controlled, so that the excessive temperature of the combined machine head is avoided, the image quality of X-ray imaging can be ensured when the control of the heat capacity is performed, and an automatic dose adjusting function is reserved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the disclosure, nor is it intended to be used to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following specification.
Drawings
The accompanying drawings illustrate exemplary embodiments and, together with the description, serve to explain exemplary implementations of the embodiments. The illustrated embodiments are for exemplary purposes only and do not limit the scope of the claims. Throughout the drawings, identical reference numerals designate similar, but not necessarily identical, elements.
The above and other features and advantages of the present disclosure will become more apparent to those of ordinary skill in the art by describing in detail embodiments thereof with reference to the attached drawings, in which:
FIG. 1 illustrates a flow chart of a method for controlling an X-ray machine in accordance with an embodiment of the present disclosure;
FIG. 2 illustrates a schematic diagram of a heat dissipation profile of a combined hand piece according to an embodiment of the present disclosure;
FIG. 3 illustrates a flow chart of the process of FIG. 1 for determining the heat capacity consumed by a combined hand piece based on the heat dissipation profile of the combined hand piece and the dissipated energy of the combined hand piece, in accordance with an embodiment of the present disclosure;
FIG. 4 illustrates a schematic diagram of a process of determining the heat capacity consumed by a combined hand piece in accordance with an embodiment of the present disclosure;
FIG. 5 illustrates a schematic diagram of modulating a frame rate of an X-ray machine in accordance with an embodiment of the present disclosure;
FIG. 6 shows a block diagram of an apparatus for controlling an X-ray machine in accordance with an embodiment of the present disclosure;
FIG. 7 shows a block diagram of an X-ray machine according to an embodiment of the present disclosure; and is also provided with
Fig. 8 is a block diagram illustrating an exemplary electronic device that can be applied to exemplary embodiments.
Detailed Description
Exemplary embodiments of the present disclosure are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present disclosure to facilitate understanding, and should be considered as merely exemplary. Accordingly, one of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope of the present disclosure. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
In the present disclosure, the use of the terms "first," "second," and the like to describe various elements is not intended to limit the positional relationship, timing relationship, or importance relationship of the elements, unless otherwise indicated, and such terms are merely used to distinguish one element from another. In some examples, a first element and a second element may refer to the same instance of the element, and in some cases, they may also refer to different instances based on the description of the context.
The terminology used in the description of the various illustrated examples in this disclosure is for the purpose of describing particular examples only and is not intended to be limiting. Unless the context clearly indicates otherwise, the elements may be one or more if the number of the elements is not specifically limited. Furthermore, the term "and/or" as used in this disclosure encompasses any and all possible combinations of the listed items.
As previously mentioned, control of the X-ray machine is required to avoid excessive temperature of the combined head. Currently, whether a corresponding power limiting operation is required is determined by observing whether the temperature of the combined handpiece reaches a threshold value, however, the corresponding power limiting operation tends to reduce the X-ray dose and/or the image quality of the X-ray image, and even stop the X-ray image.
In view of this, the present disclosure provides a method for controlling an X-ray machine comprising a combined head, the method comprising: determining the heat capacity consumed by the combined machine head based on a heat dissipation curve of the combined machine head and the heat dissipation energy of the combined machine head, wherein the heat dissipation curve is a curve which is obtained under the condition that the X-ray machine does not generate X-rays and is used for representing the heat dissipation capacity of the combined machine head; judging whether to set the combined head to a power limiting mode based on the heat capacity consumed by the combined head; and in response to the X-ray machine being in the power limiting mode, performing the following: determining a limiting power of the combined hand piece based on the heat dissipation profile of the combined hand piece and the consumed heat capacity; and determining an upper limit value of a frame rate of the combined head based on the exposure parameter and the limiting power of the combined head.
Herein, "heat capacity" characterizes the ability of the combined handpiece to carry a thermal load, and the maximum heat capacity characterizes the maximum amount of thermal load that the combined handpiece can withstand. "consumed heat capacity" refers to the heat capacity that the combined handpiece has utilized. In addition, herein, the "frame rate of the X-ray machine" refers to the frequency at which the combined handpiece performs X-ray imaging.
According to the embodiment disclosed by the disclosure, the effective control of the heat capacity of the combination machine can be realized to avoid the excessive temperature of the combination machine head, and the image quality of X-ray imaging can be ensured when the control of the heat capacity is performed, and the automatic dose adjustment function is reserved to balance the requirements of the performance of the X-ray machine and the temperature control of the X-ray machine.
Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.
Fig. 1 shows a flowchart of a method 100 for controlling an X-ray machine according to an embodiment of the present disclosure. As shown in fig. 1, the method 100 includes:
step S110, determining the heat capacity consumed by the combined machine head based on the heat dissipation curve of the combined machine head and the dissipation energy of the combined machine head;
step S120, judging whether to set the X-ray machine to a power limiting mode based on the heat capacity consumed by the combined machine head;
step S130, determining the limiting power of the combined machine head based on a heat dissipation curve of the combined machine head and the consumed heat capacity in response to the X-ray machine being in a power limiting mode, wherein the heat dissipation curve is a curve which is obtained under the condition that the X-ray machine does not generate X-rays and is used for representing the heat dissipation capacity of the combined machine head; and
step S140, determining the upper limit value of the frame rate of the X-ray machine based on the exposure parameters and the limiting power of the combined machine head.
In embodiments as described in the present disclosure, control of the heat capacity of the cluster tool may be achieved more accurately due to monitoring based on the heat capacity consumed by the cluster tool, rather than the temperature of the cluster tool; by determining the limiting power of the combined handpiece based on the combined handpiece heat dissipation curve and the consumed heat capacity, the requirements of both temperature control and imaging performance of the X-ray machine can be precisely balanced; and determining the frame rate of the X-ray machine based on the exposure parameters and the limiting power of the combined machine head, wherein the frame rate can be adjusted to meet the power limit when the temperature exceeds the preset temperature, so that the dosage of single imaging is not influenced, the automatic dosage adjusting function is reserved, and the image quality of X-ray imaging is ensured.
According to some embodiments, a combined handpiece (Monoblock) refers to a module in an X-ray machine comprising a combination of an X-ray tube and other components related to the X-ray tube. According to some embodiments, a combined handpiece includes an X-ray tube, a power converter (e.g., a step-up transformer module, a rectifier filter module, etc.) that powers the X-ray tube, a housing that houses the aforementioned X-ray tube and power converter, and an insulating cooling medium filled within the housing. According to some embodiments, the insulating cooling medium may be a liquid dielectric (e.g., insulating oil) that serves as an insulating cooling function.
According to some embodiments, the heat dissipation profile refers to a natural cooling profile in an initial state where the combined handpiece is heated to an acceptable maximum temperature and without X-ray imaging (i.e., without X-rays being generated and without subsequently generated heat) by the combined handpiece.
Fig. 2 shows a schematic diagram of a heat dissipation curve 200 of a combined hand piece according to an embodiment of the present disclosure.
As shown in fig. 2, the horizontal axis of the heat radiation curve 200 of the combined head is a time t from an initial state in which the combined head is heated to a maximum temperature that can be tolerated, when the combined head does not perform X-ray imaging, and the vertical axis is a heat capacity consumption ratio, that is, a ratio r of the heat capacity consumed by the combined head to the maximum heat capacity of the combined head. It should be understood that the longitudinal axis may also be the heat capacity consumed by the combined handpiece.
According to some embodiments, the maximum heat capacity of the combined handpiece is the heat capacity consumed when the combined handpiece is heated to the highest temperature acceptable, i.e. the ordinate of the heat dissipation curve in fig. 2 at time 0, when the heat capacity consumption ratio is 100%.
According to some embodiments, the heat dissipation curve 200 may be generated based on a simulation of the relevant parameters, or may be generated based on a fit of measured experimental data.
According to some embodiments, the heat dissipation power of the combined handpiece may be calculated from the slope of the heat dissipation curve. As can be seen in fig. 2, the slope is progressively smaller down the heat dissipation curve 200 (with the ordinate being the heat capacity consumption ratio and the abscissa being time). This is because, for an X-ray machine that does not actively dissipate heat, the proportion of heat capacity consumption of the combined machine head at the start of heat dissipation is high, the temperature gradient between the combined machine head and the external environment (e.g., ambient air or other components of the X-ray machine, such as the C-arm of a C-arm X-ray machine) is large, and the heat dissipation efficiency is high. Along with the heat dissipation, the temperature gradient between the combined machine head and the external environment becomes smaller, and the heat dissipation efficiency becomes lower.
According to some embodiments, when the heat capacity consumed by the combined hand piece is high, the average power of the combined hand piece (e.g., the average power of the combined hand piece per second) is adjusted based on the heat dissipation power of the combined hand piece such that the average power of the combined hand piece is less than or equal to the heat dissipation power of the combined hand piece, thereby avoiding the combined hand piece reaching a maximum heat capacity.
According to some embodiments, the dissipated energy of the combined handpiece is the sum of the exposure energy of the bulb and the energy dissipated by other components in the combined handpiece. The bulb generally comprises an anode target and a cathode, wherein a filament of the cathode can be electrified to generate hot electrons, and the electrons are driven by high voltage between the anode and the cathode to move at a high speed to impact the anode target surface to generate X rays, and the X rays are emitted through a window. But only a small amount of energy carried by the high-speed electrons is converted into X-ray energy, and the rest of the energy is converted into heat energy. Other components of the combined handpiece, such as the power converter, will also generate heat during operation. The exposure energy of the bulb may be determined based on, for example, the tube voltage, tube current, and exposure time. The energy dissipated by the other components may be determined, for example, based on their equivalent impedance and current. According to some embodiments, the dissipated energy of the combined handpiece is an integral of the instantaneous power of the combined handpiece with respect to time.
According to some embodiments, determining the heat capacity consumed by the combined hand piece based on the heat dissipation profile of the combined hand piece and the dissipated energy of the combined hand piece comprises: determining the heat capacity consumed by the combined machine head without accounting for heat dissipation based on the heat capacity consumed by the combined machine head at the last moment and the dissipation energy of the combined machine head from the last moment to the current moment; and determining the heat capacity consumed by the combined machine head at the current moment based on the heat capacity consumed by the combined machine head and not accounting for heat dissipation and a heat dissipation curve of the combined machine head.
According to some embodiments, the above-described operation of determining the heat capacity consumed by the combined hand piece is performed for a certain period of time (e.g., 500 ms). According to some embodiments, the dissipated energy of the combined hand piece from the previous time to the current time is an integral of the instantaneous power of the combined hand piece from the previous time to the current time with respect to time. According to some embodiments, the dissipated energy of the combined hand piece from the last time instant to the current time instant may be considered as the product of the average power of the combined hand piece from the last time instant to the current time instant multiplied by the time instant for the sake of simplicity.
According to some embodiments, determining the heat capacity consumed by the combined hand piece based on the heat dissipation profile of the combined hand piece and the dissipated energy of the combined hand piece further comprises: in response to the combined head performing X-ray imaging from the previous time to the current time, determining a heat capacity of the combined head that is consumed by the combined head and that does not account for heat dissipation based on a heat capacity of the combined head consumed at the previous time and voltages and currents of components (including bulbs and other components) in the combined head; alternatively, in response to the combined head not performing X-ray imaging from the last time to the current time, the heat capacity of the combined head that is determined to be consumed by the combined head without accounting for heat dissipation is set to the heat capacity of the combined head that is consumed at the last time.
Fig. 3 shows a flowchart of the process of determining the heat capacity consumed by the combined hand piece (step S110) in fig. 1 based on the heat dissipation profile of the combined hand piece and the dissipated energy of the combined hand piece, according to an embodiment of the present disclosure.
In step S310, it is determined whether or not the combined head performs X-ray imaging from the previous time to the current time, wherein if the result is "yes (Y)", the process proceeds to step S320, and if the result is "no (N)", the process proceeds to step S330.
In step S320, based on the heat capacity consumed by the combined head at the previous time and the voltage and current of the combined head, the heat capacity of the combined head that does not account for heat dissipation is determined, for example, if the voltage and current of the combined head are U and I, respectively, and the time between the previous time and the current time of the combined head is Δt, the heat capacity of the combined head consumed by the previous time is Q (t- Δt), the dissipation energy of the combined head between the previous time and the current time is u×i×Δt, and the heat capacity of the combined head that does not account for heat dissipation is Q (t- Δt) +u×i×Δt.
In step S330, the heat capacity consumed by the combined hand piece is determined based on the heat capacity consumed by the combined hand piece that does not account for heat dissipation and the heat dissipation profile of the combined hand piece. It should be understood that when the result of step S310 is "no (N)", the heat capacity of the combined head that does not account for heat dissipation is maintained as the heat capacity Q (t- Δt) of the combined head that was consumed at the last time.
According to some embodiments, determining the heat capacity consumed by the combined hand piece based on the heat capacity consumed by the combined hand piece that does not account for heat dissipation and the heat dissipation profile of the combined hand piece comprises: determining, based on the heat capacity consumed by the combined head at the previous time, that the ordinate on the heat dissipation curve corresponds to a first corresponding point of the heat capacity consumed by the combined head that does not account for heat dissipation; and determining a second corresponding point on the heat radiation curve, wherein the second corresponding point is obtained after the first corresponding point is subjected to a time period from the last moment to the current moment, and determining the heat capacity consumed by the combined machine head at the current moment based on the ordinate of the second corresponding point.
Fig. 4 shows a schematic diagram of a process of determining the heat capacity consumed by the combined hand piece (e.g., step S110 in fig. 1 and 3) according to an embodiment of the present disclosure.
As shown in fig. 4, the heat capacity consumed by the combined hand piece at the previous time corresponds to the point 201 on the heat dissipation curve 200, wherein the ordinate of the point 201 corresponds to the heat capacity consumed by the combined hand piece at the previous time (e.g., the ordinate of the point 201 is the ratio of the heat capacity consumed by the combined hand piece at the previous time divided by the maximum heat capacity of the combined hand piece).
As shown in fig. 4, at the current time, the heat capacity of the combined hand piece that is not accounted for by the heat dissipation corresponds to the first corresponding point 202' on the heat dissipation curve 200, wherein the ordinate of the point 202' corresponds to the heat capacity of the combined hand piece that is not accounted for by the heat dissipation that is consumed at the current time (e.g., the ordinate of the point 202' is the ratio of the heat capacity of the combined hand piece that is not accounted for by the heat dissipation that is consumed at the current time divided by the maximum heat capacity of the combined hand piece).
In addition, as shown in fig. 4, with the first corresponding point 202' as a starting point, moving rightward on the heat radiation curve 200 from the last time to the current time at results in the second corresponding point 202, and the heat capacity consumed by the combined hand piece at the current time is determined from the ordinate of the second corresponding point 202.
According to some embodiments, determining whether to set the combined hand-piece to the power limiting mode based on the heat capacity consumed by the combined hand-piece comprises: determining a ratio of heat capacities consumed by the combined hand piece based on the heat capacities consumed by the combined hand piece and the maximum heat capacity of the combined hand piece; in response to the proportion of heat capacity consumed by the combined handpiece being greater than or equal to the proportion threshold, the combined handpiece is set to a power limiting mode. According to other embodiments, determining whether to set the combined hand-piece to the power limiting mode based on the heat capacity consumed by the combined hand-piece further comprises: in response to the proportion of heat capacity consumed by the combined hand piece being less than the proportion threshold, the combined hand piece is set to a normal mode.
According to some embodiments, when a heat radiation curve (whose ordinate is the proportion of the heat capacity consumed by the combined head to the maximum heat capacity of the combined head and whose abscissa is time) showing the change of the heat capacity consumption proportion with time in the case where the X-ray machine does not generate the X-ray is used as shown in fig. 3, the proportion of the heat capacity consumed by the combined head may be determined directly from the heat radiation curve at step S110 or step 330, and whether or not to set the X-ray machine to the power limiting mode may be determined based on the proportion of the heat capacity consumed by the combined head to the maximum heat capacity of the combined head.
According to some embodiments, determining the limiting power of the combined hand piece based on the heat dissipation profile and the consumed heat capacity of the combined hand piece comprises: the limiting power of the combined hand piece is determined based on the slope of the heat dissipation curve of the combined hand piece at the heat capacity consumed by the combined hand piece.
According to some embodiments, the heat dissipation power of the combined hand piece is determined based on the slope of the heat dissipation curve of the combined hand piece at the heat capacity consumed by the combined hand piece (e.g., the slope of curve 200 at point 202 in fig. 4), and the limit power of the combined hand piece is determined based on the heat dissipation power of the combined hand piece.
According to some embodiments, determining the upper limit value of the frame rate of the X-ray machine based on the exposure parameters and the limiting power of the combined machine head comprises: determining each frame of X-ray formation performed by the combined machine head based on exposure parameters of the combined machine headThe dissipated energy of the image; and determining an upper limit value of the frame rate of the X-ray machine based on the limited power of the combined machine head and the dissipated energy of each frame of X-ray imaging performed by the combined machine head. For example, if the limiting power of the combined handpiece is P limit The frame rate f of the X-ray machine is set to be less than or equal to the frame rate upper limit value f when the dissipated energy of each frame of X-ray imaging performed by the combined machine head is W limit ＝P limit /W。
According to some embodiments, the exposure parameters of the combined hand piece include the tube voltage and tube current of the combined hand piece during exposure, and the duration of each exposure of the combined hand piece. According to some embodiments, determining the dissipated energy of each X-ray imaging of the combined handpiece based on the exposure parameters of the combined handpiece comprises: the product of the tube voltage and tube current of the combined handpiece during the exposure and the duration of each exposure of the combined handpiece is calculated as the dissipated energy of each X-ray imaging of the combined handpiece. According to some embodiments, the exposure parameters of the combined handpiece may be preset by an automatic dose adjustment procedure.
According to some embodiments, in response to the X-ray machine not being in a power limiting mode (e.g., the normal mode described above), the current frame rate of the combined handpiece is maintained.
According to some embodiments, dose adjustment and frame rate modulation may be combined. For example, a predetermined number of pulses for X-ray imaging are used as modulation periods, each pulse in the same modulation period being the same, that is, the same exposure parameters (e.g., tube voltage, tube current, exposure time) are employed in the same modulation period. This is because, when switching frame rates, the hardware of the X-ray machine (e.g., X-ray generator, X-ray detector, system timing control unit, etc.) requires response time, and communication between the software of the X-ray machine also requires time, setting the modulation period can provide time for the response and communication delay of the X-ray machine. According to some embodiments, the modulation period may be designed according to a system architecture, wherein if the system is able to accommodate variations in power and frame rate for exposure with very short delays, the modulation period may be set shorter (e.g., set to one pulse), whereas the modulation period may be set longer (e.g., set to five periods) to reserve sufficient time for communication delays and control delays. In this way, the dose regulating function is preserved.
Fig. 5 shows a schematic diagram of a pulse sequence of a modulated X-ray machine according to an embodiment of the present disclosure.
As shown in fig. 5, the modulation period is three pulses. The power of each pulse in the three pulses of the first modulation period is P1, and the pulse width is T1. The power of each of the three pulses of the second modulation period is P2, the pulse width is T2, which is different from the power and pulse width of the pulses of the first period, i.e., the exposure parameter is changed compared with the first modulation period, and the interval time between every two adjacent pulses is shortened, i.e., the frame rate is increased. The power of each of the three pulses of the third modulation period is P3 and the pulse width is T3, which are different from the power and pulse width of the pulses of the first and second periods, i.e., the exposure parameters are changed compared with the first and second modulation periods, and the interval time between every two adjacent pulses is further shortened, i.e., the frame rate becomes larger. As can be seen from fig. 5, the X-ray machine is not only adjusting the frame rate, but also performing dose adjustments. Wherein the average power of the three pulses per conditioning cycle remains the same, pavg, which is less than or equal to the limiting power of the combined handpiece to ensure that the heat capacity of the X-ray machine is within the allowable range.
According to another aspect of the present disclosure, an apparatus for controlling an X-ray machine is provided, wherein the X-ray machine comprises a combined machine head.
Fig. 6 shows a block diagram of an apparatus 600 for controlling an X-ray machine according to an embodiment of the present disclosure. As shown in fig. 6, the apparatus 600 includes:
a heat capacity consumption determination unit 610 configured to determine a heat capacity consumed by the combined head based on a heat radiation curve of the combined head, which is a curve characterizing heat radiation capability of the combined head obtained in a case where the X-ray machine does not generate X-rays, and a heat radiation energy of the combined head;
a mode setting unit 620 configured to determine whether to set the combined head to the power limiting mode based on the heat capacity consumed by the combined head; and
the frame rate determination unit 630 is configured to perform the following operations in response to the X-ray machine being in the power limiting mode:
determining a limiting power of the combined hand piece based on the heat dissipation profile of the combined hand piece and the consumed heat capacity; and
an upper limit value of a frame rate of the X-ray machine is determined based on the exposure parameters and the limiting power of the combined machine head.
It should be appreciated that the various elements of the apparatus 600 shown in fig. 6 may correspond to the various steps in the method 100 described with reference to fig. 1. Thus, the operations, features and advantages described above with respect to method 100 apply equally to apparatus 600 and the units comprised thereof. For brevity, certain operations, features and advantages are not described in detail herein.
According to another aspect of the present disclosure, there is provided an X-ray machine comprising: a combined machine head; and a controller configured to perform the method as described in the present disclosure.
Fig. 7 shows a block diagram of an X-ray machine 700 according to an embodiment of the present disclosure.
As shown in fig. 7, the X-ray machine 700 includes a combined hand piece 710 and controller 720, wherein the controller 720 is configured to perform the methods as described in the present disclosure.
According to some embodiments, the X-ray machine 700 may also include other components, such as a collimator that masks a portion of the X-rays emitted by the combined handpiece 710 for imaging a desired region of the imaging subject, and/or an X-ray detector that receives X-rays transmitted through the imaging subject for imaging the imaging subject.
According to another aspect of the present disclosure, there is provided a non-transitory computer readable storage medium storing a computer program, wherein the computer program, when executed by a processor, implements a method as described in the present disclosure.
According to another aspect of the present disclosure, there is provided a computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements a method as described in the present disclosure.
Fig. 8 is a block diagram illustrating an example of an electronic device 800 according to an example embodiment of the present disclosure. It should be noted that the structure shown in fig. 8 is only an example, and the electronic device of the present disclosure may include only one or more of the components shown in fig. 8 according to a specific implementation. A medical imaging system according to the present disclosure may include the above-described electronic device.
The electronic device 800 may be, for example, a general-purpose computer (e.g., a laptop computer, a tablet computer, etc., various computers), a mobile phone, a personal digital assistant, and the like. According to some embodiments, the electronic device 800 may be a cloud computing device and a smart device. According to some embodiments, the electronic device 800 may be a medical imaging system (e.g., an electronic computed tomography system, a digital subtraction angiography system, etc.).
According to some embodiments, the electronic device 800 may be configured to process images and the like and transmit the processing results to an output device for provision to a user. The output device may be, for example, a display screen, a device including a display screen, or other output devices. For example, the electronic device 800 may be configured to perform object detection on an image, transmit the object detection result to a display device for display, and the electronic device 800 may be further configured to perform enhancement processing on the image and transmit the enhancement result to the display device for display.
The electronic device 800 may include an image processing circuit 803, and the image processing circuit 803 may be configured to perform various image processes on an image. The image processing circuit 803 may be configured to perform at least one of the following image processes on the image, for example: noise reduction of the image, geometric correction of the image, feature extraction of the image, detection and/or identification of objects in the image, and enhancement of the image. The image processing circuitry 803 may be implemented using custom hardware, and/or may be implemented in hardware, software, firmware, middleware, microcode, hardware description languages, or any combination thereof. For example, one or more of the various circuits described above may be implemented by programming hardware (e.g., programmable logic circuits including Field Programmable Gate Arrays (FPGAs) and/or Programmable Logic Arrays (PLAs)) in an assembly language or hardware programming language such as VERILOG, VHDL, c++ using logic and algorithms according to the present disclosure.
According to some embodiments, electronic device 800 may also include an output device 804, which output device 804 may be any type of device for presenting information, and may include, but is not limited to, a display screen, a terminal with display functionality, headphones, speakers, a vibrator, and/or a printer, among others.
According to some implementations, electronic device 800 may also include an input device 805, which input device 805 may be any type of device for inputting information to electronic device 800, and may include, but is not limited to, various sensors, mice, keyboards, touch screens, buttons, levers, microphones, and/or remote controls, and the like.
According to some embodiments, electronic device 800 may also include a communication device 806, which communication device 806 may be any type of device or system that enables communication with external devices and/or with a network, and may include, but is not limited to, modems, network cards, infrared communication devices, wireless communication devices, and/or chipsets, such as bluetooth devices, 802.11 devices, wiFi devices, wiMax devices, cellular communication devices, and/or the like.
According to some implementations, the electronic device 800 may also include a processor 801. The processor 801 may be any type of processor and may include, but is not limited to, one or more general purpose processors and/or one or more special purpose processors (e.g., special processing chips). The processor 801 may be, for example, but is not limited to, a central processing unit CPU, a graphics processor GPU, or various dedicated Artificial Intelligence (AI) computing chips, or the like. In an example where the electronic device 800 may be a magnetic resonance scanning imaging device, the processor 801 may be a processor of a main control of the magnetic resonance scanning imaging device.
The electronic device 800 may also include a working memory 802 and a storage device 807. The processor 801 may be configured to obtain and execute computer readable instructions stored in the working memory 802, the storage device 807, or other computer readable media, such as program code of the operating system 802a, program code of the application programs 802b, and the like. Working memory 802 and storage device 807 are examples of computer-readable storage media for storing instructions that can be executed by processor 801 to implement the various functions as previously described. Working memory 802 may include both volatile memory and nonvolatile memory (e.g., RAM, ROM, etc.). Storage devices 807 may include hard disk drives, solid state drives, removable media, including external and removable drives, memory cards, flash memory, floppy disks, optical disks (e.g., CDs, DVDs), storage arrays, network attached storage, storage area networks, and the like. The working memory 802 and the storage device 807 may both be referred to herein collectively as memory or computer-readable storage medium, and may be non-transitory media capable of storing computer-readable, processor-executable program instructions as computer program code that may be executed by the processor 801 as a particular machine configured to implement the operations and functions described in the examples herein.
According to some embodiments, the processor 801 may control and schedule at least one of the image processing circuitry 803 and other various devices and circuits included in the electronic apparatus 800. According to some embodiments, at least some of the various components described in fig. 8 may be interconnected and/or communicate by a bus 808.
Software elements (programs) may reside in the working memory 802 including, but not limited to, an operating system 802a, one or more application programs 802b, drivers, and/or other data and code.
According to some embodiments, instructions for performing the aforementioned control and scheduling may be included in the operating system 802a or one or more application programs 802 b.
According to some embodiments, instructions to perform the method steps described in the present disclosure may be included in one or more applications 802b, and the various modules of the electronic device 800 described above may be implemented by the instructions of one or more applications 802b being read and executed by the processor 801. In other words, electronic device 800 may include a processor 801 and memory (e.g., working memory 802 and/or storage 807) storing programs including instructions, which when executed by the processor 801, cause the processor 801 to perform methods as described in various embodiments of the disclosure.
According to some embodiments, some or all of the operations performed by the image processing circuit 803 may be implemented by the processor 801 reading and executing instructions of one or more application programs 802 b.
Executable code or source code of instructions of software elements (programs) may be stored in a non-transitory computer readable storage medium (such as the storage device 807) and may be stored in the working memory 802 (possibly compiled and/or installed) when executed. Accordingly, the present disclosure provides a computer readable storage medium storing a program comprising instructions that, when executed by a processor of an electronic device, cause the electronic device to perform a method as described in various embodiments of the present disclosure. According to another embodiment, executable code or source code of instructions of the software elements (programs) may also be downloaded from a remote location.
It should also be understood that various modifications may be made according to specific requirements. For example, custom hardware may also be used, and/or individual circuits, units, modules or elements may be implemented in hardware, software, firmware, middleware, microcode, hardware description languages, or any combination thereof. For example, some or all of the circuits, units, modules, or elements contained in the disclosed methods and apparatus may be implemented by programming hardware (e.g., programmable logic circuits including Field Programmable Gate Arrays (FPGAs) and/or Programmable Logic Arrays (PLAs)) in an assembly language or hardware programming language such as VERILOG, VHDL, c++ using logic and algorithms according to the present disclosure.
According to some implementations, the processor 801 in the electronic device 800 may be distributed over a network. For example, some processes may be performed using one processor while other processes may be performed by another processor remote from the one processor. Other modules of the electronic device 800 may also be similarly distributed. As such, the electronic device 800 may be interpreted as a distributed computing system that performs processing in multiple locations. The processor 801 of the electronic device 800 may also be a processor of a cloud computing system or a processor that incorporates a blockchain.
Although embodiments or examples of the present disclosure have been described with reference to the accompanying drawings, it is to be understood that the foregoing methods, systems, and apparatus are merely exemplary embodiments or examples, and that the scope of the present invention is not limited by these embodiments or examples but only by the claims following the grant and their equivalents. Various elements of the embodiments or examples may be omitted or replaced with equivalent elements thereof. Furthermore, the steps may be performed in a different order than described in the present disclosure. Further, various elements of the embodiments or examples may be combined in various ways. It is important that as technology evolves, many of the elements described herein may be replaced by equivalent elements that appear after the disclosure.
Claims (11)
1. A method for controlling an X-ray machine, the X-ray machine comprising a combined head, the method comprising:
determining a heat capacity consumed by the combined handpiece based on a heat dissipation curve of the combined handpiece and a dissipation energy of the combined handpiece, wherein the heat dissipation curve is a curve characterizing heat dissipation capacity of the combined handpiece acquired in the case that the X-ray machine does not generate X-rays;
judging whether to set the X-ray machine to a power limiting mode based on the heat capacity consumed by the combined machine head; and
in response to the X-ray machine being in a power limiting mode, performing the following operations:
determining a limiting power of the combined hand piece based on the heat dissipation profile and the consumed heat capacity of the combined hand piece; and
an upper limit value of a frame rate of the X-ray machine is determined based on the exposure parameters and the limiting power of the combined machine head.
2. The method of claim 1, wherein the determining the heat capacity consumed by the combined hand piece based on the heat dissipation profile of the combined hand piece and the dissipated energy of the combined hand piece comprises:
determining a heat capacity of the combined head consumed without accounting for heat dissipation based on the heat capacity of the combined head consumed at a previous time and the dissipated energy of the combined head from the previous time to a current time; and
and determining the heat capacity consumed by the combined machine head at the current moment based on the heat capacity consumed by the combined machine head and not accounting for heat dissipation and a heat dissipation curve of the combined machine head.
3. The method of claim 2, wherein the determining the heat capacity consumed by the combined hand piece based on the heat dissipation profile of the combined hand piece and the dissipated energy of the combined hand piece further comprises:
determining a heat capacity of the combined head, which is consumed by the combined head and does not account for heat dissipation, based on a heat capacity of the combined head consumed at the last time and voltages and currents of components in the combined head in response to the combined head performing X-ray imaging from the last time to the current time; or,
and setting the heat capacity of the combined machine head, which is consumed by the combined machine head and does not account for heat dissipation, as the heat capacity of the combined machine head consumed at the last moment in response to the combined machine head not performing X-ray imaging between the last moment and the current moment.
4. The method of claim 1, wherein the determining whether to set the combined hand piece to a power limit mode based on the heat capacity consumed by the combined hand piece comprises:
determining a ratio of heat capacities consumed by the combined hand piece based on the heat capacities consumed by the combined hand piece and a maximum heat capacity of the combined hand piece; and
the combined hand piece is set to a power limiting mode in response to a proportion of heat capacity consumed by the combined hand piece being greater than or equal to a proportion threshold.
5. The method of claim 1, wherein the determining the limiting power of the combined hand piece based on the heat dissipation profile and the consumed heat capacity of the combined hand piece comprises:
determining the limiting power of the combined hand piece based on the slope of the heat dissipation curve of the combined hand piece at the heat capacity consumed by the combined hand piece.
6. The method of claim 1, wherein the determining an upper limit value of the frame rate of the X-ray machine based on the exposure parameters and limiting power of the combined machine head comprises:
determining the dissipated energy of each frame of X-ray imaging performed by the combined machine head based on the exposure parameters of the combined machine head; and
an upper limit value of a frame rate of the X-ray machine is determined based on the limiting power of the combined machine head and the dissipated energy of the combined machine head per frame of X-ray imaging.
7. The method of any of claims 1-6, further comprising:
in response to the X-ray machine not being in the power limiting mode, maintaining a current frame rate of the combined handpiece unchanged.
8. An apparatus for controlling an X-ray machine, the X-ray machine comprising a combined machine head, the apparatus comprising:
a heat capacity consumption determination unit configured to determine a heat capacity consumed by the combined head based on a heat radiation curve of the combined head and a heat radiation energy of the combined head, wherein the heat radiation curve is a curve characterizing a heat radiation capability of the combined head acquired in a case where the X-ray machine does not generate X-rays;
a mode setting unit configured to determine whether to set the combined head to a power limiting mode based on a heat capacity consumed by the combined head; and
a frame rate determination unit configured to perform the following operations in response to the X-ray machine being in a power limiting mode:
determining a limiting power of the combined hand piece based on the heat dissipation profile and the consumed heat capacity of the combined hand piece; and
an upper limit value of a frame rate of the X-ray machine is determined based on the exposure parameters and the limiting power of the combined machine head.
9. An X-ray machine comprising:
a combined machine head; and
a controller configured to perform the method of any of claims 1-7.
10. A non-transitory computer readable storage medium storing a computer program, wherein the computer program when executed by a processor implements the method of any of claims 1-7.
11. A computer program product comprising a computer program, wherein the computer program, when executed by a processor, implements the method of any of claims 1-7.
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| CN202311264852.7A CN117045266A (en) | 2023-09-27 | 2023-09-27 | Method, device, X-ray machine, medium and product for controlling X-rays |
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| CN202311264852.7A CN117045266A (en) | 2023-09-27 | 2023-09-27 | Method, device, X-ray machine, medium and product for controlling X-rays |
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