CN117442328A - Radio frequency energy control method and device, terminal equipment and storage medium - Google Patents
Radio frequency energy control method and device, terminal equipment and storage medium Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00696—Controlled or regulated parameters
- A61B2018/00702—Power or energy
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
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- A61B2018/00773—Sensed parameters
- A61B2018/00791—Temperature
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
- A61B2018/00636—Sensing and controlling the application of energy
- A61B2018/00904—Automatic detection of target tissue
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B18/04—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating
- A61B18/12—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by heating by passing a current through the tissue to be heated, e.g. high-frequency current
- A61B18/14—Probes or electrodes therefor
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Abstract
The invention provides a radio frequency energy control method, a radio frequency energy control device, terminal equipment and a storage medium, which are applied to the technical field of medical instrument control. The radio frequency energy control method is applied to a radio frequency energy control system, and the radio frequency energy control system comprises: an electrode needle, a temperature sensor is arranged on the electrode needle, and the electrode needle is inserted into target tissue when the electrode needle runs; the method comprises the following steps: acquiring a distance between a position to be predicted and a temperature sensor, and acquiring radio frequency current passing through an electrode needle, wherein the position to be predicted is any point in a target tissue; obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and the preset output time length; and obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and controlling the output of the radio frequency energy according to the predicted temperature. The technical scheme of the invention can solve the problem that proper radio frequency energy cannot be output according to the temperature detected by the temperature sensor in the operation electrode.
Description
Technical Field
The present invention relates to the field of medical device control technologies, and in particular, to a method and apparatus for controlling radio frequency energy, a terminal device, and a storage medium.
Background
At present, the radio frequency ablation method mainly comprises two types of non-invasive ablation and invasive ablation, taking fat ablation as an example, the non-invasive ablation ensures that a fat layer can be heated to a certain ablation temperature by applying certain power radio frequency energy to the epidermis, and the invasive ablation outputs energy to the epidermis according to temperature control by embedding a temperature sensor into a surgical electrode inserted into fat tissue.
However, the noninvasive ablation method needs to output proper radio frequency energy according to experience of an operator for different users and different ablated tissues, and in the invasive ablation method, since the temperature sensor is arranged inside the operation electrode, the temperature detected by the temperature sensor can only represent the temperature of the ablated tissue near the operation electrode, and proper radio frequency energy cannot be output according to the temperature so as to achieve the purpose of treatment.
Disclosure of Invention
The invention provides a radio frequency energy control method, a device, terminal equipment and a storage medium, and aims to solve the problem that proper radio frequency energy cannot be output according to the temperature detected by a temperature sensor in an operation electrode.
The invention provides a radio frequency energy control method, which is applied to a radio frequency energy control system, wherein the radio frequency energy control system comprises the following steps: the electrode needle is provided with a temperature sensor, and is inserted into target tissues when the electrode needle operates;
The radio frequency energy control method comprises the following steps:
acquiring a distance between a position to be predicted and the temperature sensor, and acquiring radio frequency current passing through the electrode needle, wherein the position to be predicted is any point in the target tissue;
obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and the preset output time length;
and obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and controlling the output of the radio frequency energy according to the predicted temperature.
Optionally, the step of obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and a preset output duration includes:
acquiring impedance of the position to be predicted, and determining predicted current passing through the position to be predicted according to the distance and the radio frequency current;
and determining the current heat according to the predicted current, the impedance and the preset output time.
Optionally, the step of obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor includes:
determining the temperature difference of the position to be predicted according to the current heat quantity, the heat quantity calculation formula and the heat conduction calculation formula;
And summing the local temperature acquired by the temperature sensor and the temperature difference to obtain the predicted temperature of the position to be predicted.
Optionally, the step of determining the temperature difference of the position to be predicted according to the current heat quantity, the heat quantity calculation formula and the heat conduction calculation formula includes:
inputting the current heat, the mass of the position to be predicted and the specific heat capacity of the target tissue into a heat calculation formula to obtain a first temperature difference;
inputting the current heat, the heat conductivity coefficient of the target tissue, the distance between the position to be predicted and the surface layer and the heat exchange surface area of the position to be predicted into a heat conduction calculation formula to determine a second temperature difference;
and integrating the first temperature difference and the second temperature difference to obtain the temperature difference of the position to be predicted.
Optionally, before the step of obtaining the predicted temperature of the position to be predicted from the current heat and the local temperature acquired by the temperature sensor, the method further includes:
detecting whether the temperature sensor is faulty;
the step of obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor comprises the following steps:
And when the temperature sensor does not have a fault, carrying out Kalman observation processing on the current heat and the local temperature acquired by the temperature sensor to obtain the predicted temperature of the position to be predicted.
Optionally, the step of obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor further includes:
when the temperature sensor fails, acquiring local temperature acquired when the temperature sensor fails and historical predicted temperature corresponding to the local temperature;
and obtaining a new predicted temperature of the position to be predicted according to the historical predicted temperature and the current heat.
Optionally, the step of acquiring the radio frequency current through the electrode needle includes:
and acquiring the total current and the total area of the electrode needle when the electrode needle operates, and taking the ratio of the total current to the total area as the radio frequency current passing through the electrode needle.
In addition, in order to solve the above-mentioned problem, the present invention also proposes a radio frequency energy control device, which is applied to a radio frequency energy control system, the radio frequency energy control system comprising: the electrode needle is provided with a temperature sensor, and is inserted into target tissues when the electrode needle operates;
The radio frequency energy control device includes:
the first acquisition module is used for acquiring the distance between the position to be predicted and the temperature sensor and acquiring the radio-frequency current passing through the electrode needle, wherein the position to be predicted is any point in the target tissue;
the current heat calculation module is used for obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and the preset output time length;
and the temperature prediction module is used for obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and controlling the output of the radio frequency energy according to the predicted temperature.
In addition, in order to solve the above problems, the present invention also proposes a terminal device, including: the system comprises a memory, a processor and a radio frequency energy control program stored in the memory and capable of running on the processor, wherein the radio frequency energy control program realizes the steps of the radio frequency energy control method when being executed by the processor.
In addition, in order to solve the above-mentioned problems, the present invention also proposes a storage medium having stored thereon a radio frequency energy control program which, when executed by a processor, implements the steps of the radio frequency energy control method as described above.
The invention provides a radio frequency energy control method, a device, a terminal device and a storage medium, wherein the radio frequency energy control method is applied to a radio frequency energy control system, and the radio frequency energy control system comprises the following steps: the electrode needle is provided with a temperature sensor, and is inserted into target tissues when the electrode needle operates; the radio frequency energy control method comprises the following steps: acquiring a distance between a position to be predicted and a temperature sensor arranged on the electrode needle, and acquiring radio frequency current passing through the electrode needle, wherein the position to be predicted is any point in the target tissue; obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and the preset output time length; and obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and controlling the output of the radio frequency energy according to the predicted temperature.
The radio frequency energy control device firstly obtains radio frequency current passing through the electrode needle, obtains current heat generated by different positions to be predicted according to different positions to be predicted in target tissues and the distance between the temperature sensor arranged in the electrode needle, and the output time of radio frequency energy, and further obtains predicted temperatures of different positions to be predicted according to the current heat of different distances and the local temperature acquired by the temperature sensor in the electrode needle, and further controls the output of next radio frequency energy according to the predicted temperatures of different positions to be predicted.
Compared with the traditional invasive ablation method which only carries out the output of the radio frequency energy according to the numerical value of the temperature sensor in the operation electrode, the method can predict the temperatures of different positions to be predicted in the target tissue according to the distances between different positions to be predicted in the target tissue and the temperature sensor arranged in the electrode needle and the radio frequency current, so that the output of the radio frequency energy can be controlled according to the temperatures of different positions in the target tissue, and the ablation efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.
FIG. 1 is a schematic device architecture diagram of a hardware operating environment of a terminal device according to an embodiment of the present invention;
FIG. 2 is a flow chart of a first embodiment of the RF energy control method of the present invention;
FIG. 3 is a schematic diagram of RF distribution of an embodiment of a RF energy control method according to the present invention;
FIG. 4 is a diagram illustrating a temperature prediction model of an embodiment of a method for controlling RF energy according to the present invention;
FIG. 5 is a schematic diagram illustrating a data processing flow of an embodiment of a method for controlling RF energy according to the present invention;
FIG. 6 is a functional block diagram of an embodiment of the RF energy control device of the present invention.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
As shown in fig. 1, fig. 1 is a schematic device structure diagram of a hardware operating environment of a terminal device according to an embodiment of the present invention.
It should be noted that, the terminal device according to the embodiment of the present invention may be a radio frequency energy control device that executes the radio frequency energy control method of the present application, and the terminal device may also be other terminals such as a data storage control terminal, a PC, or a portable computer that executes the radio frequency energy control method of the present application.
As shown in fig. 1, in a hardware operating environment of a terminal device, the terminal device may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein the communication bus 1002 is used to enable connected communication between these components. The user interface 1003 may include a Display, an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may further include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may also optionally be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the terminal device structure shown in fig. 1 is not limiting of the terminal device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
As shown in fig. 1, an operating system, a network communication module, a user interface module, and a radio frequency energy control program may be included in the memory 1005, which is a type of computer storage medium.
In the device shown in fig. 1, the network interface 1004 is mainly used for connecting to a background server, and performing data communication with the background server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to invoke the rf energy control program stored in the memory 1005 and perform the following operations:
acquiring a distance between a position to be predicted and the temperature sensor, and acquiring radio frequency current passing through the electrode needle, wherein the position to be predicted is any point in the target tissue;
obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and the preset output time length;
and obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and controlling the output of the radio frequency energy according to the predicted temperature.
Alternatively, the processor 1001 may be configured to call a radio frequency energy control program stored in the memory 1005 and perform the following operations:
acquiring impedance of the position to be predicted, and determining predicted current passing through the position to be predicted according to the distance and the radio frequency current;
and determining the current heat according to the predicted current, the impedance and the preset output time.
Alternatively, the processor 1001 may be configured to call a radio frequency energy control program stored in the memory 1005 and perform the following operations:
determining the temperature difference of the position to be predicted according to the current heat quantity, the heat quantity calculation formula and the heat conduction calculation formula;
and summing the local temperature acquired by the temperature sensor and the temperature difference to obtain the predicted temperature of the position to be predicted.
Alternatively, the processor 1001 may be configured to call a radio frequency energy control program stored in the memory 1005 and perform the following operations:
inputting the current heat, the mass of the position to be predicted and the specific heat capacity of the target tissue into a heat calculation formula to obtain a first temperature difference;
inputting the current heat, the heat conductivity coefficient of the target tissue, the distance between the position to be predicted and the surface layer and the heat exchange surface area of the position to be predicted into a heat conduction calculation formula to determine a second temperature difference;
And integrating the first temperature difference and the second temperature difference to obtain the temperature difference of the position to be predicted.
Alternatively, the processor 1001 may be configured to call a radio frequency energy control program stored in the memory 1005 and perform the following operations:
detecting whether the temperature sensor is faulty;
and when the temperature sensor does not have a fault, carrying out Kalman observation processing on the current heat and the local temperature acquired by the temperature sensor to obtain the predicted temperature of the position to be predicted.
Alternatively, the processor 1001 may be configured to call a radio frequency energy control program stored in the memory 1005 and perform the following operations:
when the temperature sensor fails, acquiring local temperature acquired when the temperature sensor fails and historical predicted temperature corresponding to the local temperature;
and obtaining a new predicted temperature of the position to be predicted according to the historical predicted temperature and the current heat.
Alternatively, the processor 1001 may be configured to call a radio frequency energy control program stored in the memory 1005 and perform the following operations:
and acquiring the total current and the total area of the electrode needle when the electrode needle operates, and taking the ratio of the total current to the total area as the radio frequency current passing through the electrode needle.
Based on the above hardware structure, the overall conception of each embodiment of the radio frequency energy control method is provided.
In the embodiment of the invention, the radio frequency ablation method is mainly used for noninvasive ablation and invasive ablation, taking fat ablation as an example, the noninvasive ablation ensures that a fat layer can be heated to a certain ablation temperature by applying certain power radio frequency energy to the epidermis, and the invasive ablation is realized by embedding a temperature sensor into a surgical electrode inserted into fat tissue and outputting energy to the epidermis according to temperature control.
However, the noninvasive ablation method needs to output proper radio frequency energy according to experience of an operator for different users and different ablated tissues, and in the invasive ablation method, since the temperature sensor is arranged inside the operation electrode, the temperature detected by the temperature sensor can only represent the temperature of the ablated tissue near the operation electrode, and proper radio frequency energy cannot be output according to the temperature so as to achieve the purpose of treatment.
In order to solve the above problems, an embodiment of the present invention provides a method, an apparatus, a terminal device, and a storage medium for controlling radio frequency energy, where the method for controlling radio frequency energy is applied to a radio frequency energy control system, and the radio frequency energy control system includes: the electrode needle is provided with a temperature sensor, and is inserted into target tissues when the electrode needle operates; the radio frequency energy control method comprises the following steps: acquiring a distance between a position to be predicted and a temperature sensor arranged on the electrode needle, and acquiring radio frequency current passing through the electrode needle, wherein the position to be predicted is any point in the target tissue; obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and the preset output time length; and obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and controlling the output of the radio frequency energy according to the predicted temperature.
The radio frequency energy control device firstly obtains radio frequency current passing through the electrode needle, obtains current heat generated by different positions to be predicted according to different positions to be predicted in target tissues and the distance between the temperature sensor arranged in the electrode needle, and the output time of radio frequency energy, and further obtains predicted temperatures of different positions to be predicted according to different current heat and local temperatures acquired by the temperature sensor in the electrode needle, and further controls the next output of radio frequency energy according to the predicted temperatures of different positions to be predicted.
Compared with the traditional invasive ablation method which only carries out the output of the radio frequency energy according to the numerical value of the temperature sensor in the operation electrode, the method can predict the temperatures of different positions to be predicted in the target tissue according to the distances between the different positions to be predicted in the target tissue and the temperature sensor and the radio frequency current, so that the output of the radio frequency energy can be controlled according to the temperatures of the different positions in the target tissue, and the ablation efficiency is improved.
Based on the overall conception of the radio frequency energy control method of the invention, various embodiments of the radio frequency energy control method of the invention are provided.
Referring to fig. 2, fig. 2 is a flowchart illustrating a method for controlling rf energy according to a first embodiment of the present invention. It should be noted that although a logic sequence is shown in the flowchart, in some cases, the steps of the rf energy control method of the present invention may of course be performed in a different order than that herein.
In this embodiment, the radio frequency energy control method is applied to a radio frequency energy control system, and the radio frequency energy control system includes: the electrode needle is provided with a temperature sensor, and is inserted into target tissues when the electrode needle operates, and the radio frequency energy control method comprises the following steps:
step S10: acquiring a distance between a position to be predicted and the temperature sensor, and acquiring radio frequency current passing through the electrode needle, wherein the position to be predicted is any point in the target tissue;
in the radio frequency treatment of the user, the user inserts the electrode needle into the skin of the user, that is, inserts the electrode needle into the target tissue, and attaches an electrode sheet (negative plate) to the skin of the user, and then turns on the power source, and the target tissue heats up to ablate the target substance by the flow of current from the power source, the electrode needle, the human tissue, the electrode sheet (negative plate), and the power source.
It is to be understood that a temperature sensor is provided in the electrode needle for detecting the temperature in the vicinity of the subcutaneous tissue (target tissue). The electrode plate (negative plate) and the electrode needle are arranged in pairs to form an electric field loop for the electrode needle.
In this embodiment, when performing rf treatment on the user, the rf energy control device will acquire the distance between any position in the target tissue and the temperature sensor provided in the electrode needle, and acquire the rf current through the electrode needle.
Wherein the step of acquiring the radio frequency current through the electrode needle comprises:
step S101: and acquiring the total current and the total area of the electrode needle when the electrode needle operates, and taking the ratio of the total current to the total area as the radio frequency current passing through the electrode needle.
In this embodiment, the formula for calculating the radio frequency current is as follows:
i T ＝i z /S，
wherein i is T Is radio frequency current, i Z Is the total current and S is the total area of the electrode needle.
The radio frequency energy control device may comprise a ammeter to obtain the value of the total current, and the radio frequency current passing through the temperature sensor may be obtained by substituting the total current and the area of the electrode needle into the above formula.
Step S20: obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and the preset output time length;
in this embodiment, the radio frequency energy control device further determines the heat generated by the current at the position to be predicted according to the radio frequency current, the distance between the position to be predicted and the temperature sensor, and the preset radio frequency energy output duration.
Step S30: and obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and controlling the output of the radio frequency energy according to the predicted temperature.
In this embodiment, the rf energy control device obtains the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor in the electrode needle, and further controls the output of the next rf energy according to the predicted temperature.
Referring to fig. 3, fig. 3 is a schematic diagram of a radio frequency distribution of an embodiment of a radio frequency energy control method according to the present invention, wherein a J point is a position of a temperature to be predicted in a target tissue, a P point is a position of a temperature sensor in an electrode needle, and N is an electrode sheet (negative plate) attached to skin of a user. The radio frequency energy control device firstly obtains the distance from the point J to the point P, obtains radio frequency current passing through the point P, then obtains current heat generated by the current passing through the point J according to the radio frequency current, the distance and the preset radio frequency output time length, then determines the predicted temperature of the point J according to the local temperature and the current heat acquired by the temperature sensor at the point P, and further controls the time and the magnitude of the radio frequency energy output next time according to the predicted temperature.
In the embodiment, the method and the device can predict the temperatures of different positions to be predicted in the target tissue according to the distances between the different positions to be predicted in the target tissue and the temperature sensor and the radio frequency current, so that the output of radio frequency energy can be controlled according to the temperatures of the different positions in the target tissue, and the ablation efficiency is improved.
Further, based on the first embodiment of the radio frequency energy control method of the present invention described above, a second embodiment of the radio frequency energy control method of the present invention is presented.
In this embodiment, the step S20 is as follows: obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and the preset output time length, wherein the method comprises the following steps:
step S201: acquiring impedance of the position to be predicted, and determining predicted current passing through the position to be predicted according to the distance and the radio frequency current;
it should be noted that, the impedance of the position to be predicted is related to the type of the target tissue, for example, the target tissue is adipose tissue, and the impedance of the position to be predicted is the impedance of the adipose tissue.
In this embodiment, the radio frequency energy control device will also acquire the impedance of the position to be predicted, and determine the predicted current passing through the position to be predicted according to the distance between the position to be predicted and the temperature sensor and the radio frequency current passing through the temperature sensor.
Step S202: and determining the current heat according to the predicted current, the impedance and the preset output time.
In this embodiment, the radio frequency energy control device substitutes the predicted current, the impedance and the output time length into the heat calculation formula to determine the current heat generated at the position to be predicted.
Illustratively, it is assumed that the target tissue is adipose tissue, and the impedance of the adipose tissue is 3850Ω·cm, and the position to be predicted is point j in fig. 3. The radio frequency energy control device acquires the impedance of the adipose tissue in unit volume, acquires the distance between the device to be predicted and the temperature sensor, and the current passing through the temperature sensor, and determines the current generated at the position to be predicted according to a prediction current calculation formula. The calculation formula of the predicted current is as follows:
i j ＝i p /r j 2 ，
wherein i is j Predicted current at point-j, r j Distance (depth) of j point from P point, i P -current density at point P.
Then, the radio frequency energy control device substitutes the predicted current, the impedance of the position to be predicted and the output time length into the following formula to calculate and obtain the current heat of the point j:
Q j ＝f*i j 2 *R j *t，
wherein Q is j The heat quantity of the current at the point j, f is constant, R j Impedance, t is the output duration.
Optionally, in one possible embodiment, step S30 above: obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, wherein the method comprises the following steps:
Step S301: determining the temperature difference of the position to be predicted according to the current heat quantity, the heat quantity calculation formula and the heat conduction calculation formula;
in this embodiment, after obtaining the current heat of the position to be predicted, the radio frequency energy control device substitutes the current heat into the heat calculation formula and the heat conduction calculation formula, so as to determine the temperature difference of the position to be predicted relative to the position where the temperature sensor is located.
Step S302: and summing the local temperature acquired by the temperature sensor and the temperature difference to obtain the predicted temperature of the position to be predicted.
In this embodiment, after determining the temperature difference between the position to be predicted and the position where the temperature sensor is located, the radio frequency energy control device adds the temperature difference to the local temperature acquired by the temperature sensor, so as to obtain the predicted temperature of the position to be predicted.
For example, assuming that the current heat is Q, the radio frequency energy control device can respectively substitute Q into the heat calculation formula and the heat conduction calculation formula, so as to obtain a first temperature difference generated by heat at the position to be predicted and a second temperature difference generated by heat conduction at the position to be predicted, then determine a total temperature difference generated by the position to be predicted according to the first temperature difference and the second temperature difference, and further add the local temperature acquired by the temperature sensor and the total temperature difference to obtain the predicted temperature of the position to be predicted.
Optionally, in one possible embodiment, step S301 above: determining the temperature difference of the position to be predicted according to the current heat quantity, the heat quantity calculation formula and the heat conduction calculation formula, wherein the determining comprises the following steps:
step S3011: inputting the current heat, the mass of the position to be predicted and the specific heat capacity of the target tissue into a heat calculation formula to obtain a first temperature difference;
in the present embodiment, the heat calculation formula is as follows:
Q j ＝m j *c*ΔT，
wherein Q is j Represents the heat quantity at point j, m j Represents the mass of the unit target tissue, c represents the specific heat capacity of the target tissue, and Δt represents the temperature change of the object.
The radio frequency energy control device takes the current heat as Q j The mass of the position to be predicted is taken as m j And Q is taken j 、m j Substituting c into the heat calculation formula so as to calculate delta T, and taking the delta T as a first temperature difference.
Step S3012: inputting the current heat, the heat conductivity coefficient of the target tissue, the distance between the position to be predicted and the surface layer and the heat exchange surface area of the position to be predicted into a heat conduction calculation formula to determine a second temperature difference;
in the present embodiment, the heat conduction calculation formula is as follows:
Q＝k*A*(ΔT cond /L)，
wherein Q is the heat transferred, k is the heat conductivity coefficient of the material, A #Area of heat exchange surface, deltaT cond -the difference in heat transfer temperature L-the distance between the heat exchanging surfaces.
Assuming that the target tissue is a human adipose layer tissue, K is 0.2W/(mK). The radio frequency energy control device inputs the current heat, the heat conductivity coefficient, the distance and the heat exchange surface area into the heat conduction formula to obtain delta T cond And will be DeltaT cond As a second temperature difference.
Step S3013: and integrating the first temperature difference and the second temperature difference to obtain the temperature difference of the position to be predicted.
The integration processing refers to processing of summing, integrating, and the like, on the data.
In this embodiment, after determining the first temperature difference and the second temperature difference, the radio frequency energy control device may add the first temperature difference and the second temperature difference according to a specification of a technician to determine a temperature difference of a position to be predicted, or input the first temperature difference and the second temperature difference into a preset temperature difference calculation formula or a temperature difference calculation model to obtain the temperature difference of the position to be predicted.
In this embodiment, the accuracy of temperature prediction is improved by calculating the current heat of the position to be predicted, determining the first temperature difference of the position to be predicted, which is obtained by heat, and the second temperature difference, which is obtained by heat conduction, according to the current heat, and integrating the first temperature difference and the second temperature difference.
Further, based on the first embodiment and the second embodiment of the radio frequency energy control method of the present invention described above, a third embodiment of the radio frequency energy control method of the present invention is proposed.
In the present embodiment, in the above step S30: before obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, the method further comprises:
step S40: detecting whether the temperature sensor is faulty;
in this embodiment, the rf energy control device may also detect whether the temperature sensor is malfunctioning through the mature temperature sensor malfunction detection device, so that the rf energy control device predicts the temperature of the target tissue according to the state of the temperature sensor.
Based on this, step S30 described above: obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, wherein the method comprises the following steps:
step S306: and when the temperature sensor does not have a fault, carrying out Kalman observation processing on the current heat and the local temperature acquired by the temperature sensor to obtain the predicted temperature of the position to be predicted.
The kalman observation process refers to a process of predicting a change in data by a kalman filter algorithm, and in this embodiment, refers to a process of predicting a change in temperature.
In this embodiment, when the temperature sensor is detected to operate normally by the temperature sensor fault detection device, the radio frequency energy control device represents that the local temperature collected by the current temperature sensor is normal, then determines the temperature difference of the position to be predicted according to the current heat, and inputs the local temperature collected by the temperature sensor and the calculated temperature difference into a preset kalman filtering prediction model to obtain the predicted temperature of the position to be predicted.
The electrode plate is also provided with a temperature sensor, and the radio frequency energy control device can also predict the temperature of each depth unit volume in the target tissue according to the temperature sensor on the electrode plate.
Referring to fig. 4, fig. 4 is a temperature prediction model diagram of an embodiment of a method for controlling rf energy according to the present invention, wherein i P -radio frequency current, T scarfskin The skin temperature detected by the temperature sensor,-observer estimated skin temperature, +.>-temperature at target tissue depth j estimated by observer, +.>-the observer estimates the epidermal heat,/->-temperature of any depth target tissue estimated by the observer, K-thermal conductivity.
The temperature sensor fault detection module is provided with a temperature sensor fault detection device, when the temperature sensor fault detection module detects that the temperature sensor does not have faults, the radio frequency energy control device can acquire the skin temperature according to the temperature sensor arranged on the electrode plate, obtain the temperature difference between the position to be predicted and the temperature acquired by the temperature sensor on the electrode plate according to the radio frequency heating model and the target tissue heat conduction mathematical model, and then input the local temperature acquired by the temperature sensor and the calculated temperature difference into a preset Kalman filtering prediction model to obtain the predicted temperature of the position to be predicted.
Optionally, in one possible embodiment, step S30 above: obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and further comprising:
step S307, when the temperature sensor fails, acquiring local temperature acquired when the temperature sensor fails and historical predicted temperature corresponding to the local temperature;
in this embodiment, when the radio frequency energy control device detects that the temperature sensor fails, the local temperature acquired by the temperature sensor is not available at this time. The radio frequency energy control device acquires the local temperature acquired when the temperature sensor fails and the historical predicted temperature corresponding to the local temperature.
And step 308, obtaining a new predicted temperature of the position to be predicted according to the historical predicted temperature and the current heat.
In this embodiment, after obtaining the historical predicted temperature, the radio frequency energy control device calculates the temperature difference of the position to be predicted according to the current heat, and then determines the new predicted temperature of the position to be predicted according to the historical predicted temperature and the temperature difference.
Illustratively, it is assumed that the local temperatures collected before a failure of the temperature sensor are ordered by the collection time: 31 °, 33 °, and 35 °, and the historical predicted temperatures corresponding to the above-described local temperatures are respectively: 34 DEG, 36 DEG and 38 DEG, the radio frequency energy control device can determine a new predicted temperature according to the historical predicted temperature of the local temperature prediction with the latest acquisition time of 38 DEG and the temperature difference calculated according to the current heat quantity when the temperature sensor fails. For example, the historical predicted temperature is 38 degrees, and the temperature difference calculated according to the current heat is +3°, the rf energy control device obtains a new predicted temperature of 41 ° (38+3).
Referring to fig. 5, fig. 5 is a schematic diagram of a data processing flow of an embodiment of a method for controlling rf energy according to the present invention, wherein the target tissue is adipose tissue. The radio frequency current signal acquisition module is used for acquiring radio frequency current, the epidermis temperature detection module comprises a temperature sensor and is used for acquiring epidermis temperature, the tissue impedance calculation module is used for determining the impedance of a target tissue, then the radio frequency energy control device inputs the data into the Kalman filter observer temperature prediction module, the heat conduction temperature difference is calculated through the heat conduction module, the heat temperature difference is calculated through the radio frequency heating model temperature rise calculation module and integrated, and then the epidermis temperature, the heat conduction temperature difference and the integrated heat temperature difference are added through the adder to obtain the target tissue temperature prediction results of different depths.
In this embodiment, the present invention further detects whether the temperature sensor has a fault, and adopts different prediction processes when the temperature sensor has a fault or not, so that the radio frequency energy control device can still complete a radio frequency treatment cycle on the premise that the temperature sensor has a fault.
In addition, the invention also provides a radio frequency energy control device.
Referring to fig. 6, the rf energy control device is applied to an rf energy control system, and the rf energy control system includes: the electrode needle is provided with a temperature sensor, and is inserted into target tissue when the electrode needle operates, and the radio frequency energy control device comprises:
a first obtaining module 10, configured to obtain a distance between a position to be predicted and the temperature sensor, and obtain a radio frequency current passing through the electrode needle, where the position to be predicted is any point in the target tissue;
the current heat calculation module 20 is configured to obtain the current heat of the position to be predicted according to the radio frequency current, the distance and a preset output duration;
the temperature prediction module 30 is configured to obtain a predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and control output of radio frequency energy according to the predicted temperature.
Optionally, the current heat calculation module 20 includes:
the predicted current determining unit is used for obtaining the impedance of the position to be predicted and determining the predicted current passing through the position to be predicted according to the distance and the radio frequency current;
And the heat formula calculation unit is used for determining the current heat according to the predicted current, the impedance and the preset output duration.
Optionally, the temperature prediction module 30 includes:
the temperature difference determining unit is used for determining the temperature difference of the position to be predicted according to the current heat quantity, the heat quantity calculation formula and the heat conduction calculation formula;
and the summing unit is used for summing the local temperature acquired by the temperature sensor and the temperature difference to obtain the predicted temperature of the position to be predicted.
Optionally, the temperature difference determining unit includes:
the first temperature difference determining subunit is used for inputting the current heat, the mass of the position to be predicted and the specific heat capacity of the target tissue into a heat calculation formula to obtain a first temperature difference;
the second temperature difference determining subunit is used for inputting the current heat, the heat conductivity coefficient of the target tissue, the distance between the position to be predicted and the surface layer and the heat exchange surface area of the position to be predicted into a heat conduction calculation formula to determine a second temperature difference;
and the integration subunit is used for integrating the first temperature difference and the second temperature difference to obtain the temperature difference of the position to be predicted.
Optionally, the radio frequency energy control device includes:
The fault detection module is used for detecting whether the temperature sensor is faulty or not;
based on this, the temperature prediction module 30 is further configured to perform a kalman observation process on the current heat and the local temperature acquired by the temperature sensor to obtain a predicted temperature of the position to be predicted when the temperature sensor fails.
Optionally, the temperature prediction module 30 is further configured to obtain, when the temperature sensor fails, a local temperature acquired when the temperature sensor does not fail and a historical predicted temperature corresponding to the local temperature;
and obtaining a new predicted temperature of the position to be predicted according to the historical predicted temperature and the current heat.
Optionally, the first acquiring module 10 includes:
and the radio frequency current calculation unit is used for acquiring the total current and the total area of the electrode needle when the electrode needle operates, and taking the ratio of the total current to the total area as the radio frequency current passing through the electrode needle.
The function implementation of each module in the radio frequency energy control device corresponds to each step in the radio frequency energy control method embodiment, and the function and implementation process of each module are not described here again.
In addition, the invention also provides a terminal device, which comprises: the system comprises a memory, a processor and a radio frequency energy control program stored in the memory and capable of running on the processor, wherein the radio frequency energy control program realizes the steps of the radio frequency energy control method according to the invention when being executed by the processor.
The specific embodiments of the terminal device of the present invention are substantially the same as the embodiments of the above-mentioned radio frequency energy control method, and will not be described herein.
In addition, the invention also provides a storage medium, and the storage medium stores a radio frequency energy control program, and the radio frequency energy control program realizes the steps of the radio frequency energy control method of the invention when being executed by a processor.
The specific embodiments of the storage medium of the present invention are substantially the same as the embodiments of the above-mentioned rf energy control method, and are not described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk), comprising several instructions for causing a terminal device (which may be a car-mounted computer, a smart phone, a computer, or a server, etc.) to perform the method described in the embodiments of the present application.
The foregoing description is only of the preferred embodiments of the present application, and is not intended to limit the scope of the claims, and all equivalent structures or equivalent processes using the descriptions and drawings of the present application, or direct or indirect application in other related technical fields are included in the scope of the claims of the present application.
Claims (10)
1. A radio frequency energy control method, wherein the radio frequency energy control method is applied to a radio frequency energy control system, the radio frequency energy control system comprising: the electrode needle is provided with a temperature sensor, and is inserted into target tissues when the electrode needle operates;
the radio frequency energy control method comprises the following steps:
acquiring a distance between a position to be predicted and the temperature sensor, and acquiring radio frequency current passing through the electrode needle, wherein the position to be predicted is any point in the target tissue;
obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and the preset output time length;
and obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and controlling the output of the radio frequency energy according to the predicted temperature.
2. The radio frequency energy control method according to claim 1, wherein the step of obtaining the current heat of the position to be predicted from the radio frequency current, the distance and a preset output time period comprises:
acquiring impedance of the position to be predicted, and determining predicted current passing through the position to be predicted according to the distance and the radio frequency current;
And determining the current heat according to the predicted current, the impedance and the preset output time.
3. The radio frequency energy control method according to claim 1, wherein the step of obtaining the predicted temperature of the position to be predicted from the current heat and the local temperature acquired by the temperature sensor includes:
determining the temperature difference of the position to be predicted according to the current heat quantity, the heat quantity calculation formula and the heat conduction calculation formula;
and summing the local temperature acquired by the temperature sensor and the temperature difference to obtain the predicted temperature of the position to be predicted.
4. The radio frequency energy control method according to claim 3, wherein the step of determining the temperature difference of the position to be predicted from the current heat quantity, the heat quantity calculation formula and the heat conduction calculation formula comprises:
inputting the current heat, the mass of the position to be predicted and the specific heat capacity of the target tissue into a heat calculation formula to obtain a first temperature difference;
inputting the current heat, the heat conductivity coefficient of the target tissue, the distance between the position to be predicted and the epidermis electrode needle and the heat exchange surface area of the position to be predicted into a heat conduction calculation formula to determine a second temperature difference;
And integrating the first temperature difference and the second temperature difference to obtain the temperature difference of the position to be predicted.
5. The radio frequency energy control method according to claim 1, wherein, before the step of obtaining the predicted temperature of the position to be predicted from the current heat and the local temperature acquired by the temperature sensor, the method further comprises:
detecting whether the temperature sensor is faulty;
the step of obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor comprises the following steps:
and when the temperature sensor does not have a fault, carrying out Kalman observation processing on the current heat and the local temperature acquired by the temperature sensor to obtain the predicted temperature of the position to be predicted.
6. The method of claim 5, wherein the step of obtaining the predicted temperature of the location to be predicted based on the current heat and the local temperature acquired by the temperature sensor further comprises:
when the temperature sensor fails, acquiring local temperature acquired when the temperature sensor fails and historical predicted temperature corresponding to the local temperature;
And obtaining a new predicted temperature of the position to be predicted according to the historical predicted temperature and the current heat.
7. The method of radio frequency energy control according to claim 1, wherein the step of obtaining radio frequency current through the electrode needle comprises:
and acquiring the total current and the total area of the electrode needle when the electrode needle operates, and taking the ratio of the total current to the total area as the radio frequency current passing through the electrode needle.
8. A radio frequency energy control device, wherein the radio frequency energy control device is applied to a radio frequency energy control system, the radio frequency energy control system comprising: the electrode needle is provided with a temperature sensor, and is inserted into target tissues when the electrode needle operates;
the radio frequency energy control device includes:
the first acquisition module is used for acquiring the distance between the position to be predicted and the temperature sensor and acquiring the radio-frequency current passing through the electrode needle, wherein the position to be predicted is any point in the target tissue;
the current heat calculation module is used for obtaining the current heat of the position to be predicted according to the radio frequency current, the distance and the preset output time length;
And the temperature prediction module is used for obtaining the predicted temperature of the position to be predicted according to the current heat and the local temperature acquired by the temperature sensor, and controlling the output of the radio frequency energy according to the predicted temperature.
9. A terminal device, characterized in that the terminal device comprises: a memory, a processor and a radio frequency energy control program stored on the memory and executable on the processor, which when executed by the processor, implements the steps of the radio frequency energy control method of any one of claims 1 to 7.
10. A storage medium having stored thereon a radio frequency energy control program which when executed by a processor performs the steps of the radio frequency energy control method according to any one of claims 1 to 7.
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