Radio frequency ablation simulation system and method with temperature control function

Abstract

The invention provides a radiofrequency ablation simulation system and method with temperature control, and the system is characterized in that the system comprises a picture storage part; the geometric construction part is used for constructing a radiofrequency ablation geometric model according to the tissue parameters and the probe parameters, and the radiofrequency ablation geometric model comprises a simulation electrode tube, a simulation probe point and simulation tissue; the temperature calculation part stores a temperature threshold value and is used for calculating temperature data of each point in the simulated tissue within a period of time according to the microwave parameters, the probe temperature threshold value and the radiofrequency ablation geometric model; the chart generation part is used for generating a plurality of function charts according to the temperature data and the radiofrequency ablation geometric model; and the display part is used for displaying an input display picture to a user to enable the user to input the simulation parameters, displaying a function selection picture to the user and displaying a corresponding function chart or a radiofrequency ablation geometric model according to the function selected by the user. In a word, the method can obtain the radiofrequency ablation simulation data corresponding to the optimal radiofrequency ablation effect.

Description

Technical Field

[0001] The present invention relates to radiofrequency ablation simulation, and in particular to a radiofrequency ablation simulation system and method with temperature control. Background Art

[0002] Radiofrequency ablation (RFA) is a treatment that kills unwanted tissue by continuously heating it. Electrodes at the front of the catheter introduce high-frequency current into the affected area, causing the tissue cells in the affected area to rapidly move and rub against each other, generating high temperatures and denaturing the cellular proteins in the affected area, ultimately killing the cells and eliminating the affected area. The high temperature of RF ablation effectively covers the affected area while preventing unnecessary thermal damage to surrounding healthy tissue, effectively reducing surgical risks and alleviating patient pain.

[0003] However, in actual operation, it is difficult for the operator to intuitively understand the effect of radiofrequency ablation, and thus it is impossible to protect the surrounding healthy tissue to the greatest extent while eliminating the diseased area, resulting in the problem that the diseased area cannot be completely eliminated or the healthy tissue is excessively damaged. Summary of the Invention

[0004] The present invention is made to solve the above-mentioned problems, and its purpose is to provide a radiofrequency ablation simulation system and method with temperature control.

[0005] The present invention provides a radiofrequency ablation simulation system with temperature control, which has the following features: a screen storage unit, which stores an input display screen for users to input simulation parameters and a function selection screen for users to select and generate different function charts, the simulation parameters include microwave parameters, tissue parameters and probe parameters; a geometry construction unit, which is used to construct a radiofrequency ablation geometry model based on the tissue parameters and the probe parameters, and the radiofrequency ablation geometry model includes a simulated electrode tube, a simulated probe point and a simulated tissue; a temperature calculation unit, which stores a temperature threshold, which is used to calculate the temperature data of each point in the simulated tissue within a period of time based on the microwave parameters, the probe temperature threshold and the radiofrequency ablation geometry model; a chart generation unit, which is used to generate a temperature data based on the temperature data and the radiofrequency ablation geometry model. The model generates multiple function charts; a display unit is used to display an input display screen to the user so that the user can input simulation parameters, and to display a function selection screen to the user and display the corresponding function chart or radiofrequency ablation geometric model according to the function selected by the user, wherein the temperature calculation unit includes: a heat transfer module, which stores preset heat transfer equations and wave equations, and is used to calculate temperature data through a two-way full coupling method of electromagnetic field and thermal field based on the simulated electromagnetic waves, heat transfer equations and wave equations at the location of the simulated electrode tube, and the size of the simulated electromagnetic wave is calculated based on the microwave parameters; a threshold storage module is used to store temperature thresholds; an electromagnetic wave control module is used to control the generation of simulated electromagnetic waves based on the temperature data and temperature threshold of the simulated probe point.

[0006] The radiofrequency ablation simulation system with temperature control provided by the present invention may also have the following features: wherein the wave equation is expressed as: Where μ r is the relative magnetic permeability, ε r is the relative dielectric constant, σ is the conductivity, E r is the electric field intensity, k0 is the wave number of the electromagnetic wave in free space, ε0 is the absolute dielectric constant, and the heat transfer equation is expressed as: Where ρ is the tissue density, c is the tissue specific heat capacity, k is the thermal conductivity of the tissue, T is the ambient temperature inside the tissue, x = {r, z} is the area in the two-dimensional axisymmetric coordinate system, ρ b is the blood density, c b is the specific heat capacity of blood, ω b is the blood perfusion rate, T b is the temperature of plasma entering the tissue, Q m Q is the heat energy generated during the metabolism of biological tissues. rf It is the heat energy generated by radio frequency energy.

[0007] The radiofrequency ablation simulation system with temperature control provided by the present invention may also have the following features: wherein the temperature threshold includes a maximum temperature threshold and a minimum temperature threshold, and the specific process of the electromagnetic wave control module controlling the generation of simulated electromagnetic waves is: when the temperature data of the simulated probe point is less than the minimum temperature threshold, the simulated electromagnetic wave is controlled to be generated; when the temperature data of the simulated probe point is greater than the maximum temperature threshold, the simulated electromagnetic wave is controlled not to be generated.

[0008] The radiofrequency ablation simulation system with temperature control provided by the present invention may also have the following features: wherein the maximum temperature threshold is 60°C and the minimum temperature threshold is 40°C.

[0009] The radiofrequency ablation simulation system with temperature control provided by the present invention may also have the following features: wherein, the functions for the user to select in the function selection screen include: model display, parameter calculation, temperature map display, damage condition display, isotherm display and probe temperature display, and the function chart includes a temperature map corresponding to the temperature map display, a damaged tissue condition map corresponding to the damage condition display, an isotherm map corresponding to the isotherm display and a probe temperature map corresponding to the probe temperature display.

[0010] The radiofrequency ablation simulation system with temperature control provided by the present invention may also have the following features: wherein, the chart generating unit includes: a temperature map drawing module, which is used to generate a temperature map based on temperature data and a radiofrequency ablation geometric model; a damage value calculation module, which is used to calculate the damage score of each point in the radiofrequency ablation geometric model based on the temperature data; a damage map drawing module, which is used to generate a damaged tissue condition map based on the damage score and the radiofrequency ablation geometric model; an isotherm drawing module, which is used to generate an isotherm map based on temperature data and a radiofrequency ablation geometric model; and a probe temperature map drawing module, which is used to generate a probe temperature map based on the temperature data of the simulated probe point.

[0011] The radiofrequency ablation simulation system with temperature control provided by the present invention may also have the following features: a control unit configured to control the temperature calculation unit to calculate and obtain temperature data after the user selects parameter calculation.

[0012] The present invention also provides a radiofrequency ablation simulation method for obtaining radiofrequency ablation simulation data using any of the above-mentioned radiofrequency ablation simulation systems with temperature control, which has the following characteristics and includes the following steps: step S1, setting initial parameters as simulation parameters; step S2, inputting the simulation parameters into the radiofrequency ablation simulation system; step S3, judging whether the various functional charts and radiofrequency ablation geometric models generated by the radiofrequency ablation simulation system meet the preset requirements, if so, executing step S5, if not, executing step S4; step S4, adjusting the simulation parameters, and executing step S2; step S5, using the simulation parameters as radiofrequency ablation simulation data.

[0013] Functions and effects of the invention

[0014] According to the temperature-controlled radiofrequency ablation simulation system and method of the present invention, on the one hand, the heat transfer module uses the wave equation and the heat transfer equation to calculate the temperature through a two-way full coupling method of the electromagnetic field and the thermal field, and adjusts the output of the simulated electromagnetic wave according to the temperature threshold, thereby obtaining the temperature data of the simulated tissue under temperature control; on the other hand, multiple functional charts are constructed based on the temperature data, allowing the user to intuitively understand the simulated radiofrequency ablation results of different simulation parameters, thereby better obtaining the most appropriate simulation parameters. Therefore, the temperature-controlled radiofrequency ablation simulation system and method of the present invention can obtain radiofrequency ablation simulation data corresponding to the optimal radiofrequency ablation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a block diagram of a radiofrequency ablation simulation system according to an embodiment of the present invention;

[0016] Figure 2 is a schematic diagram of an input display screen in an embodiment of the present invention;

[0017] Figure 3is a schematic diagram of a function selection screen in an embodiment of the present invention;

[0018] Figure 4 is a schematic diagram of a radiofrequency ablation geometric model in an embodiment of the present invention;

[0019] Figure 5 is a schematic diagram of a temperature diagram in an embodiment of the present invention;

[0020] Figure 6 is a schematic diagram of a damaged tissue condition diagram in an embodiment of the present invention;

[0021] Figure 7 is a schematic diagram of an isotherm diagram in an embodiment of the present invention;

[0022] Figure 8 is a schematic diagram of a probe temperature map in an embodiment of the present invention;

[0023] Figure 9 is a schematic diagram of a partially enlarged geometric model of radiofrequency ablation in an embodiment of the present invention;

[0024] Figure 10 4 is a flow chart of a radiofrequency ablation simulation method in an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments and accompanying drawings specifically illustrate the temperature-controlled radiofrequency ablation simulation system and method of the present invention.

[0026] This embodiment provides a radiofrequency ablation simulation system with temperature control. The radiofrequency ablation simulation system is set as an application in a mobile device, and the mobile device includes a smart phone, a tablet computer, etc.

[0027] Figure 1 4 is a block diagram of a radiofrequency ablation simulation system in an embodiment of the present invention.

[0028] like Figure 1 As shown, the radiofrequency ablation simulation system 100 includes: a screen storage unit 10, a geometry construction unit 20, a temperature calculation unit 30, a graph generation unit 40, a display unit 50, and a control unit 60 for controlling the above units.

[0029] The screen storage unit 10 stores an input display screen 101 for the user to input simulation parameters and a function selection screen 102 for the user to select and generate different function charts. The simulation parameters include microwave parameters, tissue parameters, and probe parameters.

[0030] Figure 2 Schematic diagram of an input display screen in an embodiment of the present invention.

[0031] like Figure 2 As shown, the input display screen 101 includes a microwave parameter input area 1011 , a tissue parameter input area 1012 and a probe parameter input area 1013 .

[0032] The microwave parameter input area 1011 is used to input microwave parameters, including microwave frequency and input microwave power. The unit of microwave frequency is GHz, and the unit of input microwave power is W.

[0033] The tissue parameter input area 1012 is used to input tissue parameters, including the length and width of the lesion part, and the units of the length and width of the lesion part are both mm.

[0034] The probe parameter input area 1013 is used to input probe parameters, including the probe position r and the probe position z. The units of the probe position r and the probe position z are both mm.

[0035] Figure 3 2 is a schematic diagram of a function selection screen in an embodiment of the present invention.

[0036] like Figure 3 As shown, the function selection interface 102 includes a geometry button 1021, a calculation button 1022, a temperature, two-dimensional button 1023, a damaged tissue, two-dimensional button 1024, an isotherm (ht) button 1025 and a probe temperature button 1026, for the user to select the corresponding function.

[0037] The geometry button 1021 is used to enable the corresponding part to perform the model display function.

[0038] The calculation button 1022 is used to cause the corresponding part to perform parameter calculation.

[0039] Temperature, the two-dimensional button 1023 is used to enable the corresponding part to perform the function of displaying a temperature graph.

[0040] Damaged tissue, the two-dimensional button 1024 is used to enable the corresponding part to perform the function of displaying the damaged condition.

[0041] The isotherm (ht) button 1025 is used to enable the corresponding part to perform the isotherm display function.

[0042] The probe temperature button 1026 is used to enable the corresponding part to execute the function of displaying the probe temperature.

[0043] The geometry construction unit 20 is used to construct a radiofrequency ablation geometry model according to tissue parameters and probe parameters.

[0044] Figure 4 Schematic diagram of the radiofrequency ablation geometric model in an embodiment of the present invention.

[0045] like Figure 4As shown, RF ablation geometric model 200 includes simulated electrode tube 201, simulated probe point 202, and simulated tissue 203. In this embodiment, simulated tissue 203 includes normal tissue 2031, displayed as a rectangle, and diseased tissue 2032, constructed based on tissue parameters. Simulated electrode tube 201 is composed of an electrode and a catheter. Reference lines and arrows in the figure are provided for easy identification and are not part of RF ablation geometric model 200.

[0046] The temperature calculation unit 30 stores a temperature threshold value, and is used to calculate the temperature data of each point in the simulated tissue within a period of time according to the microwave parameters, the probe temperature threshold value and the radiofrequency ablation geometric model.

[0047] The temperature calculation unit 30 includes a heat transfer module 301 , a threshold storage module 302 and an electromagnetic wave control module 303 .

[0048] The heat transfer module 301 stores preset heat transfer equations and wave equations, and is used to calculate temperature data through a two-way full coupling method of electromagnetic field and thermal field based on the simulated electromagnetic waves, heat transfer equations and wave equations at the location of the simulated electrode tube.

[0049] During radiofrequency ablation, the electrodes generate high temperatures by emitting high-frequency current, i.e., electromagnetic waves, to kill cells in the diseased area. During this process, the thermal field and the electric field are coupled due to the thermal dependence of the electrical conductivity and contact impedance between the electrode and the tissue. On the one hand, the electromagnetic field can affect the temperature distribution and heat conduction of the material through the radiation and absorption of electromagnetic waves. On the other hand, the thermal field can also affect the propagation and absorption of the electromagnetic field through thermal radiation and heat conduction. In addition, the electric field problem is a frequency domain harmonic analysis, while the heat transfer problem is a transient time domain analysis. In this embodiment, the radiofrequency ablation simulation system 100 simulates the electromagnetic wave to obtain a simulated electromagnetic wave, and the size of the simulated electromagnetic wave is calculated based on the microwave parameters.

[0050] Therefore, in this embodiment, two research modes, frequency domain and transient, are used to calculate the temperature data of the entire simulated tissue through a two-way full coupling method of electromagnetic field and thermal field.

[0051] The frequency domain part mainly analyzes electromagnetic waves. In this embodiment, the divergence and curl are introduced into Maxwell's equation to obtain the wave equation, which is expressed as follows:

[0052]

[0053] Where μ r is the relative magnetic permeability, ε r is the relative dielectric constant, σ is the conductivity, E r is the electric field intensity, k0 is the wave number of the electromagnetic wave in free space, and ε0 is the absolute dielectric constant.

[0054] Transient analysis is used for the bioheat transfer part. In this embodiment, the Pannes heat transfer equation is used as the heat transfer equation, and its expression is:

[0055]

[0056] Where ρ is tissue density, unit is kg / m 3 , c is the tissue specific heat capacity, unit is J / kg*K, k is the thermal conductivity of the tissue, unit is W / m*K, T is the temperature of the environment in the tissue, unit is ℃, x={r,z} is the area in the two-dimensional axisymmetric coordinate system, ρ b is the blood density in kg / m 3 , c b is the specific heat capacity of blood, in J / kg*K, ω b is the blood perfusion rate, in kg / m 3 *s,T b Q is the temperature of plasma entering the tissue, in °C. m It is the heat energy generated during the metabolism of biological tissues, with the unit of W / m 3 , Q rf The heat energy generated by radio frequency energy, the unit is W / m 3 In this embodiment, due to the difference between the other terms Q rf The effect on biological heat conduction is small and can be ignored.

[0057] In this embodiment, the temperature data is calculated based on the wave equation and the heat transfer equation in combination with the following expression:

[0058]

[0059]

[0060] Q m =σ m ||Ei|| 2 / 2,

[0061] Where V m is the energy current in the cell, in V, σ m is the tissue conductivity, in S / m, E m is the electrostatic field of biological tissue, Ei is the internal electric field charge induced in the tissue, Q m is the power density per unit volume.

[0062] The threshold storage module 302 is used to store temperature thresholds, which include a maximum temperature threshold and a minimum temperature threshold.

[0063] During treatment, the temperature around the electrodes can reach 60-100°C. When localized temperatures exceed 60°C, the body will experience irreversible thermal damage, leading to apoptosis and, in turn, the formation of a coagulation zone. Tumor cell membranes have lower cholesterol concentrations and are less tolerant to heat than normal human cells. Malignant tumor tissue has poorly developed vascular networks and low heat dissipation efficiency. When the same amount of energy is applied, the localized temperature rises higher than that of normal tissue, making it more susceptible to thermal damage and directly affecting the size and appearance of the coagulation zone. Therefore, in this embodiment, the maximum temperature threshold is set at 60°C, and the minimum temperature threshold is set at 40°C to control the impact of the simulated electromagnetic waves on the simulated tissue.

[0064] The electromagnetic wave control module 303 is used to control the generation of the simulated electromagnetic wave according to the temperature data and the temperature threshold of the simulated probe point.

[0065] The specific process of the electromagnetic wave control module 303 controlling the generation of simulated electromagnetic waves is as follows:

[0066] When the temperature data of the simulated probe point is less than a minimum temperature threshold, the control generates a simulated electromagnetic wave; when the temperature data of the simulated probe point is greater than a maximum temperature threshold, the control does not generate a simulated electromagnetic wave.

[0067] The chart generating unit 40 is used to generate multiple functional charts based on temperature data and the RF ablation geometric model. The functional charts include a temperature chart corresponding to the temperature chart display, a damaged tissue condition chart corresponding to the damage condition display, an isotherm chart corresponding to the isotherm display, and a probe temperature chart corresponding to the probe temperature display.

[0068] The chart generating unit 40 includes a temperature map drawing module 401 , a damage value calculation module 402 , a damage map drawing module 403 , an isotherm drawing module 404 and a probe temperature map drawing module 405 .

[0069] The temperature map drawing module 401 is used to generate a temperature map according to temperature data and the radiofrequency ablation geometric model.

[0070] Figure 5 Schematic diagram of a temperature diagram in an embodiment of the present invention.

[0071] like Figure 5 As shown in the figure, this temperature map shows the temperature of simulated tissue during 10 minutes of radiofrequency ablation. The figure displays the temperature of each point in the simulated tissue as a heat map. The higher the temperature at the corresponding location, the brighter the location. The temperature display range is 40°C to 75°C. The horizontal axis in the figure is the corresponding position r of each point, and the vertical axis is the corresponding position z of each point. The units are all in millimeters.

[0072] The damage value calculation module 402 is used to calculate the damage score of each point in the radiofrequency ablation geometric model according to the temperature data.

[0073] The damaged map drawing module 403 is used to generate a damaged tissue condition map according to the damage score and the radiofrequency ablation geometric model.

[0074] Figure 6 Schematic diagram of damaged tissue condition in an embodiment of the present invention.

[0075] like Figure 6 As shown in the figure, this temperature map shows the simulated tissue damage during 10 minutes of radiofrequency ablation. The figure uses a heat map to display the damage at each point in the simulated tissue. The higher the damage score at the corresponding location, the higher the brightness at that location. The damage score ranges from 0.2 to 1. The horizontal axis in the figure represents the position r of each point, and the vertical axis represents the position z of each point, both in millimeters.

[0076] The isotherm plotting module 404 is used to generate an isotherm map according to the temperature data and the radiofrequency ablation geometric model.

[0077] Figure 7 Schematic diagram of the isotherm diagram in the embodiment of the present invention.

[0078] like Figure 7 As shown in the figure, the isotherm plot shows the temperature of simulated tissue during 10 minutes of radiofrequency ablation. The plot combines isotherms with a thermogram to display the temperature at different locations in the simulated tissue. The isotherm values ​​range from 311K to 349K, corresponding to the isotherms from the outside to the inside. The horizontal axis represents the position r of each point, and the vertical axis represents the position z of each point, both in millimeters.

[0079] The probe temperature map drawing module 405 is used to generate a probe temperature map according to the temperature data of the simulated probe points.

[0080] Figure 8 Schematic diagram of a probe temperature map in an embodiment of the present invention.

[0081] like Figure 8 As shown in the figure, the probe temperature graph shows the temperature at the simulated probe point during a 10-minute simulated radiofrequency ablation. The horizontal axis represents time in minutes, and the vertical axis represents temperature in degrees Celsius. As can be seen, when the temperature at the simulated probe point exceeds 60°C, although the simulated electromagnetic wave generation ceases, the temperature of the tissue surrounding the simulated electrode tube continues to rise due to inertia. This temperature rises to around 83°C, at which point inertia disappears and the temperature of the tissue surrounding the simulated electrode tube begins to drop. When the probe temperature drops below 40°C, a new round of simulated electromagnetic wave generation begins.

[0082] The display unit 50 is used to display an input display screen to the user so that the user can input simulation parameters, and to display a function selection screen to the user and display a corresponding function chart or radiofrequency ablation geometric model according to the function selected by the user.

[0083] In this embodiment, the display portion is further provided with an auxiliary button for partially amplifying the radiofrequency ablation geometric model.

[0084] Figure 9 It is a schematic diagram of a partially enlarged geometric model of radiofrequency ablation in an embodiment of the present invention.

[0085] like Figure 9 As shown, the horizontal axis represents the position r of each point in the simulated tissue 203, and the vertical axis represents the position z of each point, both in millimeters. The reference lines and arrows in the figure are for visual reference and are not part of the RF ablation geometric model 200.

[0086] The control unit 60 stores a control program for controlling the operation of each unit. After the user selects parameter calculation, the control unit 60 controls the temperature calculation unit 30 to calculate and obtain temperature data.

[0087] The process of performing a radiofrequency ablation simulation method using the radiofrequency ablation simulation system 100 with temperature control will be described with reference to the following drawings.

[0088] Figure 10 4 is a flow chart of a radiofrequency ablation simulation method in an embodiment of the present invention.

[0089] like Figure 10 As shown, the radiofrequency ablation simulation method includes the following steps:

[0090] Step S1, setting initial parameters as simulation parameters.

[0091] Step S2 : inputting simulation parameters into the radiofrequency ablation simulation system 100 .

[0092] Step S3, determining whether the functional charts and the radiofrequency ablation geometric model generated by the radiofrequency ablation simulation system 100 meet the preset requirements, if so, executing step S5, if not, executing step S4.

[0093] Step S4: Adjust the simulation parameters and execute step S2. In this embodiment, the temperature threshold is further adjusted according to the preset requirements, so as to eliminate the diseased tissue while minimizing the damage to normal tissue.

[0094] Step S5: Using the simulation parameters as radiofrequency ablation simulation data. In this embodiment, the radiofrequency ablation simulation data also includes a temperature threshold.

[0095] In this embodiment, through the above-mentioned radiofrequency ablation simulation method, the user can set the parameters of the corresponding radiofrequency ablation device according to the radiofrequency ablation simulation data, thereby eliminating the diseased area during actual radiofrequency ablation while avoiding excessive damage to healthy tissue.

[0096] Functions and Effects of the Embodiments

[0097] The temperature-controlled RF ablation simulation system and method of this embodiment utilizes a heat transfer module that uses wave and heat transfer equations to calculate temperature through a fully coupled, two-way electromagnetic and thermal field method. The output of the simulated electromagnetic wave is adjusted based on a temperature threshold, thereby obtaining temperature data for the simulated tissue under temperature control. Furthermore, multiple functional charts are constructed using this temperature data, allowing the user to intuitively understand the simulated RF ablation results for different simulation parameters, thereby better determining the most appropriate simulation parameters. In summary, this method can obtain RF ablation simulation data corresponding to the optimal RF ablation effect.

[0098] Those skilled in the art will appreciate that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A radiofrequency ablation simulation system with temperature control, characterized in that: include: a screen storage unit storing an input display screen for a user to input simulation parameters and a function selection screen for the user to select and generate different function charts, wherein the simulation parameters include microwave parameters, tissue parameters, and probe parameters; a geometry construction unit, configured to construct a radiofrequency ablation geometry model according to the tissue parameters and the probe parameters, wherein the radiofrequency ablation geometry model includes a simulated electrode tube, a simulated probe point, and a simulated tissue; a temperature calculation unit storing a temperature threshold value, and being used to calculate the temperature data of each point in the simulated tissue over a period of time according to the microwave parameters, the probe temperature threshold value and the radiofrequency ablation geometric model; a chart generating unit, configured to generate a plurality of function charts according to the temperature data and the radiofrequency ablation geometric model; a display unit configured to display the input display screen to the user so that the user can input the simulation parameters, and to display the function selection screen to the user and display the corresponding function chart or the radiofrequency ablation geometric model according to the function selected by the user; Wherein, the temperature calculation unit includes: a heat transfer module storing a preset heat transfer equation and a wave equation, for calculating the temperature data by a two-way full coupling method of electromagnetic field and thermal field based on the simulated electromagnetic wave at the location of the simulated electrode tube, the heat transfer equation, and the wave equation, wherein the size of the simulated electromagnetic wave is calculated based on the microwave parameters; A threshold storage module, configured to store the temperature threshold; The electromagnetic wave control module is used to control the generation of the simulated electromagnetic wave according to the temperature data of the simulated probe point and the temperature threshold.

2. The radiofrequency ablation simulation system with temperature control according to claim 1, characterized in that: in, The expression of the wave equation is: Where μ r is the relative magnetic permeability, ε r is the relative dielectric constant, σ is the conductivity, E r is the electric field intensity, k0 is the wave number of the electromagnetic wave in free space, ε0 is the absolute dielectric constant, The heat transfer equation is expressed as: Where ρ is the tissue density, c is the tissue specific heat capacity, k is the thermal conductivity of the tissue, T is the ambient temperature inside the tissue, x = {r, z} is the area in the two-dimensional axisymmetric coordinate system, ρ b is the blood density, c b is the specific heat capacity of blood, ω b is the blood perfusion rate, T b is the temperature of plasma entering the tissue, Q m Q is the heat energy generated during the metabolism of biological tissues. rf It is the heat energy generated by radio frequency energy.

3. The radiofrequency ablation simulation system with temperature control according to claim 1, characterized in that: in, The temperature threshold includes a maximum temperature threshold and a minimum temperature threshold, The specific process of the electromagnetic wave control module controlling the generation of the simulated electromagnetic wave is as follows: When the temperature data of the simulated probe point is less than the minimum temperature threshold, controlling the generation of the simulated electromagnetic wave; When the temperature data of the simulated probe point is greater than the maximum temperature threshold, the simulated electromagnetic wave is controlled not to be generated.

4. The radiofrequency ablation simulation system with temperature control according to claim 3, characterized in that: in, The maximum temperature threshold is 60°C, and the minimum temperature threshold is 40°C.

5. The radiofrequency ablation simulation system with temperature control according to claim 1, characterized in that: in, The functions selected by the user in the function selection screen include: model display, parameter calculation, temperature map display, damage status display, isotherm display and probe temperature display. The functional graph includes a temperature graph corresponding to the temperature graph display, a damaged tissue condition graph corresponding to the damage condition display, an isotherm graph corresponding to the isotherm display, and a probe temperature graph corresponding to the probe temperature display.

6. The radiofrequency ablation simulation system with temperature control according to claim 5, Its characteristics are: in, The chart generating unit includes: a temperature map drawing module, configured to generate the temperature map according to the temperature data and the radiofrequency ablation geometric model; a damage value calculation module, configured to calculate the damage score of each point in the radiofrequency ablation geometric model according to the temperature data; a damaged tissue map drawing module, configured to generate the damaged tissue condition map according to the damage score and the radiofrequency ablation geometric model; an isotherm drawing module, configured to generate the isotherm map according to the temperature data and the radiofrequency ablation geometric model; The probe temperature map drawing module is used to generate the probe temperature map according to the temperature data of the simulated probe point.

7. The radiofrequency ablation simulation system with temperature control according to claim 5, characterized in that: Also includes: The control unit is used to control the temperature calculation unit to calculate and obtain the temperature data after the user selects the parameter calculation.

8. A radiofrequency ablation simulation method for obtaining radiofrequency ablation simulation data using the radiofrequency ablation simulation system with temperature control according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1, setting initial parameters as the simulation parameters; Step S2, inputting the simulation parameters into the radiofrequency ablation simulation system; Step S3, determining whether the functional charts and the radiofrequency ablation geometric model generated by the radiofrequency ablation simulation system meet preset requirements, if so, executing step S5, if not, executing step S4; Step S4, adjusting the simulation parameters and executing step S2; Step S5: using the simulation parameters as the radiofrequency ablation simulation data.

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