Vapor ablation leakage blockage detection method, structure and equipment and storage medium

Abstract

The invention relates to the technical field of steam ablation, and provides a steam ablation leakage and blockage detection method, structure and device and a storage medium, and the method comprises the steps: obtaining temperature detection information which represents the steam temperature of steam ablation; determining a corresponding steam temperature value according to the temperature detection information; acquiring a real-time temperature curve according to the time sequence change of the steam temperature value; according to the real-time temperature curve and a reference temperature curve, leakage and blockage judgment information is obtained; wherein the reference temperature curve represents the steam temperature change when steam leakage and steam blockage do not exist. By detecting the temperature of the steam and generating the real-time temperature curve, the effect of detecting whether the steam leaks or is blocked or not is achieved based on the difference between the real-time temperature curve and the reference temperature curve, the situation of steam leakage and steam blocking can be known timely and reliably, the treatment effect of steam ablation is guaranteed, and the treatment efficiency is improved. Meanwhile, the safety and the reliability of steam ablation are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of steam ablation, and in particular to a steam ablation leakage detection method, structure, equipment and storage medium. Background Art

[0002] Steam ablation uses high-temperature steam to release latent heat within the diseased tissue, causing protein denaturation in the diseased tissue and inactivation of diseased cells, thereby achieving a therapeutic effect. Steam ablation, in conjunction with a puncture needle or steam catheter, can accurately transmit steam to the target treatment location, with reliable targeting. However, during the steam transmission process, there is inevitably the risk of steam leakage, such as leakage from the connection of the steam transmission pathway, leakage from the wound in the puncture into the human tissue, leakage from the sealed airbag, etc. In the event of steam leakage, not only will the treatment effect fail to meet expectations, but the leaked steam may even damage healthy cell tissues.

[0003] Existing technologies have only relied on optimizing the physical sealing structure to reduce the likelihood of steam leakage, but this cannot guarantee complete prevention. Currently, during steam ablation, there is a lack of means to detect steam leaks, making it difficult to detect them in a timely manner. This is detrimental to ensuring the therapeutic efficacy of steam ablation and affects its reliability.

[0004] Therefore, how to reliably and timely detect whether steam is leaking during the steam ablation process is an urgent problem that needs to be solved. Summary of the Invention

[0005] The present invention provides a steam ablation leakage detection method, structure, device and storage medium, which are used to solve the defect in the prior art that steam leakage cannot be detected during the steam ablation process.

[0006] The present invention provides a steam ablation leak detection method, comprising: Acquiring temperature detection information, where the temperature detection information represents a steam temperature of steam ablation; Determining a corresponding steam temperature value according to the temperature detection information; Obtaining a real-time temperature curve according to the temporal changes of the steam temperature value; Obtaining leakage and blockage determination information according to the real-time temperature curve and the reference temperature curve; The reference temperature curve represents the steam temperature change when there is no steam leakage and steam blockage.

[0007] According to a steam ablation leak detection method provided by the present invention, after obtaining leak determination information according to the real-time temperature curve and the reference temperature curve, the method further includes: Determining the presence of steam leakage or steam blockage based on the leakage and blockage determination information, generating an interruption instruction and generating an alarm message; The interruption instruction is used to interrupt steam transmission, and the alarm information is used to warn of steam leakage or steam blockage.

[0008] According to a steam ablation leak detection method provided by the present invention, determining the corresponding steam temperature value according to the temperature detection information includes: Acquire denoised temperature information based on the temperature detection information and performing denoising processing; When the temperature detection information is generated by directly measuring the steam temperature, obtaining the steam temperature value according to the denoised temperature information; When the temperature detection information is generated by indirectly measuring the steam temperature, processing is performed based on a preset temperature compensation model according to the denoised temperature information to obtain the steam temperature value; The preset temperature compensation model is used to correct the temperature deviation of indirect measurement.

[0009] According to a steam ablation leak detection method provided by the present invention, obtaining leak determination information based on the real-time temperature curve and the reference temperature curve includes: Based on sampling at the same time point, a preset number of first sampling points are extracted from the real-time temperature curve, and a preset number of second sampling points are extracted from the reference temperature curve; Obtaining a correlation calculation value corresponding to a time point based on the first sampling point and the second sampling point corresponding to the same time point, based on correlation operation and recursive operation; The leakage and blockage determination information is obtained according to the correlation calculation value corresponding to each time point.

[0010] According to a steam ablation leak detection method provided by the present invention, obtaining a correlation calculation value corresponding to a time point based on the first sampling point and the second sampling point corresponding to the same time point based on correlation operation and recursive operation includes: Obtaining a measured correlation value at the initial time point based on a correlation operation according to the first sampling point and the second sampling point at the initial time point; Using the measured correlation value at the initial time point as the calculated correlation value at the initial time point; A recursive operation is performed based on the first sampling point, the second sampling point and the correlation calculation value at each time point to obtain the correlation calculation value corresponding to each time point.

[0011] According to a steam ablation leak detection method provided by the present invention, the recursive operation includes: For the next time point, the gain coefficient is calculated based on the detection error value and the prediction error value; Obtaining the corresponding measured correlation value based on a correlation operation according to the first sampling point and the second sampling point corresponding to the current time point; Calculating the correlation calculation value at the current time point according to the measured correlation value, the gain coefficient, and the correlation calculation value at the previous time point; According to the prediction error value and the gain coefficient, the prediction error value is updated until each sampling time point is traversed; The detection error value represents the detection error of the temperature detection information, and the initial value of the prediction error value is a preset value.

[0012] According to a steam ablation leak detection method provided by the present invention, before the sampling based on the same time point, the method further includes: The real-time temperature curve and the reference temperature curve are normalized and logarithmically converted.

[0013] The present invention also provides a steam ablation leakage and blockage detection structure, comprising: A temperature sensing module is provided in the steam ablation pipeline; a signal processing module, electrically connected to the temperature sensing module; A processing module is electrically connected to the signal processing module, and the processing module is used to execute the above-mentioned steam ablation leakage and blockage detection method.

[0014] According to a steam ablation leakage detection structure provided by the present invention, the temperature sensing module includes a metal pipe segment and a first temperature sensor. The metal pipe segment is used to be connected in series with the steam ablation pipeline and the metal pipe segment allows steam to pass through. The first temperature sensor is arranged on the outer wall surface of the metal pipe segment, and the first temperature sensor is electrically connected to the signal processing module.

[0015] According to a steam ablation leakage detection structure provided by the present invention, the temperature sensing module includes a connecting pipe section, a second temperature sensor and a sealed lead-out structure. The connecting pipe section is used to be connected in series with the steam ablation pipeline. The second temperature sensor is arranged in the connecting pipe section. The connecting pipe section is provided with a lead-out hole. The sealed lead-out structure is arranged in the connecting pipe section and the sealed lead-out structure blocks the lead-out hole. The second temperature sensor is electrically connected to the signal processing module through the sealed lead-out structure.

[0016] The present invention further provides a steam ablation device, comprising a device body, wherein the device body is provided with a steam ablation pipeline and the above-mentioned steam ablation leakage and blockage detection structure.

[0017] The present invention also provides an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, a steam ablation leak detection method as described above is implemented.

[0018] The present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, any of the above-mentioned steam ablation leakage and blockage detection methods is implemented.

[0019] The present invention provides a method, structure, device and storage medium for detecting leakage and blockage in steam ablation, which at least has the following beneficial effects: by obtaining temperature detection information representing the temperature of the steam, the corresponding steam temperature value can be determined according to the temperature detection information, and then a real-time temperature curve can be obtained according to the time series change of the steam temperature value. In the case of leakage or blockage in steam ablation, there will be differences in the temperature change of the steam. For example, in the case of steam leakage, the maximum temperature of the steam will drop, and in the case of steam blockage, the maximum temperature of the steam will rise. Accordingly, by comparing the real-time temperature curve with the reference temperature curve, it is possible to determine whether there is a steam leak or steam blockage based on the temperature change of the steam, and then obtain leakage and blockage determination information. In this way, by detecting the temperature of the steam and generating a real-time temperature curve, based on the difference between the real-time temperature curve and the reference temperature curve, the effect of detecting whether there is a steam leak or blockage is achieved, which is conducive to timely and reliable knowledge of steam leakage and steam blockage, thereby ensuring the therapeutic effect of steam ablation, and improving the safety and reliability of steam ablation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a flow chart of a steam ablation leak detection method provided by the present invention.

[0022] Figure 2 This is a schematic diagram of a reference temperature curve in one embodiment of a steam ablation leak detection method provided by the present invention.

[0023] Figure 3 This is a schematic diagram of a real-time temperature curve in the case of steam leakage in one embodiment of a steam ablation leakage detection method provided by the present invention.

[0024] Figure 4This is a schematic diagram of a real-time temperature curve under steam blockage in one embodiment of a steam ablation leakage detection method provided by the present invention.

[0025] Figure 5 It is a schematic diagram of the architecture of a steam ablation leakage and blockage detection structure provided by the present invention.

[0026] Figure 6 It is a structural schematic diagram of one embodiment of a steam ablation leakage detection structure provided by the present invention.

[0027] Figure 7 It is a structural schematic diagram of another embodiment of a steam ablation leakage and blockage detection structure provided by the present invention.

[0028] Figure 8 It is a structural schematic diagram of the electronic device provided by the present invention.

[0029] Reference numerals: 100: temperature sensing module; 101: steam ablation pipeline; 110: metal pipe section; 111: first temperature sensor; 120: connecting pipe section; 121: second temperature sensor; 122: sealing lead structure; 200: signal processing module; 300: processing module. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0031] The following combination Figure 1 A steam ablation leak detection method of the present invention is described, comprising: S100: Acquire temperature detection information, where the temperature detection information represents the steam temperature of steam ablation; S110: Determine a corresponding steam temperature value according to the temperature detection information; S120: Obtaining a real-time temperature curve according to the temporal change of the steam temperature value; S130: Obtaining leakage and blockage determination information according to the real-time temperature curve and the reference temperature curve; The reference temperature curve represents the steam temperature change when there is no steam leakage and steam blockage.

[0032] By acquiring temperature detection information representing the steam temperature, the corresponding steam temperature value can be determined based on the temperature detection information, and then a real-time temperature curve can be obtained based on the time series changes in the steam temperature value. In the event of a leak or blockage due to steam ablation, the temperature change of the steam will vary. For example, the maximum temperature of the steam will decrease in the case of a steam leak, while the maximum temperature of the steam will increase in the case of a steam blockage. Based on this, by comparing the real-time temperature curve with the reference temperature curve, it is possible to determine whether there is a steam leak or steam blockage based on the steam temperature change, and thus obtain leakage and blockage determination information.

[0033] In this way, by detecting the temperature of the steam and generating a real-time temperature curve, based on the difference between the real-time temperature curve and the reference temperature curve, the effect of detecting whether the steam is leaking or blocked can be achieved, which is conducive to timely and reliable knowledge of steam leakage and steam blockage, thereby ensuring the therapeutic effect of steam ablation and improving the safety and reliability of steam ablation.

[0034] Because steam ablation involves delivering steam into human tissue, a certain pressure exists within the tissue, causing the pressure during steam delivery to exceed standard atmospheric pressure. This increased pressure, coupled with the higher boiling point of water, increases the temperature of steam. At standard atmospheric pressure, the temperature of steam is approximately 100°C. When steam is delivered into human tissue, the temperature rises, typically to 103°C, though this temperature may vary depending on the target tissue area for steam ablation.

[0035] Therefore, under normal circumstances, the temperature of the steam will be higher than 100°C, reaching 103°C. Under normal circumstances, the real-time temperature curve should be close to the reference temperature curve. In some embodiments, the reference temperature curve is as follows: Figure 2 As shown. In the case of steam leakage, due to the pressure drop, the steam temperature will remain at 100 ° C and cannot reach 103 ° C. The corresponding real-time temperature curve when steam leakage occurs is as follows Figure 3 As shown in the figure, it can be seen that when steam leakage occurs, the steam temperature continues to hover around 100°C and cannot reach 103°C. In the case of steam blockage, the pressure will increase significantly and the steam temperature will be significantly higher than 103°C. The real-time temperature curve corresponding to steam blockage is as follows: Figure 4 As shown in the figure, when steam blockage occurs, the steam temperature will exceed 103°C and continue to rise. Therefore, it is possible to determine whether steam leakage or steam blockage occurs based on the steam temperature.

[0036] The present invention compares the real-time temperature curve with a reference temperature curve and determines whether a steam leak or steam blockage has occurred based on the degree to which the real-time temperature curve deviates from the reference temperature curve. Compared to threshold protection, the present invention uses the real-time temperature curve and the reference temperature curve to combine temporal temperature changes, such as temperature rise, to make a comprehensive judgment, improving the accuracy of leak and blockage judgments and enabling simultaneous detection of steam leaks and steam blockages.

[0037] In some embodiments, a reference temperature curve can be obtained by accumulating a large amount of clinical data from steam ablation treatments, that is, a steam temperature change curve when there is no steam leakage or steam blockage. It can be understood that the reference temperature curve may be different for different target tissue areas for steam ablation.

[0038] It should be noted that temperature information is continuously acquired. That is, during the steam ablation process, the steam temperature is monitored in real time, generating a real-time temperature curve. By comparing the real-time temperature curve with the reference temperature curve, it is possible to determine whether there are any abnormal temperature changes, and thus whether there is a steam leak or steam blockage.

[0039] During steam ablation, before steam is delivered to the target, a steam delivery test is performed in vitro. This means that blockage determination is performed outside the body to ensure proper steam delivery. During in vitro steam delivery, the real-time temperature curve is also compared with a reference temperature curve to determine if there is a leak or blockage.

[0040] In some embodiments of the steam ablation leak detection method of the present invention, after S130, the method further includes: Determining the presence of steam leakage or steam blockage based on the leakage and blockage determination information, generating an interruption instruction and generating an alarm message; The interruption instruction is used to interrupt steam transmission, and the alarm information is used to warn of steam leakage or steam blockage.

[0041] Based on leak and blockage information, when steam leakage or blockage occurs, a terminal command is generated to promptly cut off steam delivery, preventing the leak from affecting non-target tissues. Simultaneously, an alarm message is generated to notify the user of the steam leak or blockage. This improves the speed of response to steam ablation and steam leakage, effectively avoiding the risk of non-target tissue burns or equipment damage caused by steam anomalies, and ensuring the safety of the steam ablation process.

[0042] In some embodiments of the steam ablation leak detection method of the present invention, the step S110 includes: Acquire denoised temperature information based on the temperature detection information and performing denoising processing; When the temperature detection information is generated by directly measuring the steam temperature, obtaining the steam temperature value according to the denoised temperature information; When the temperature detection information is generated by indirectly measuring the steam temperature, processing is performed based on a preset temperature compensation model according to the denoised temperature information to obtain the steam temperature value; The preset temperature compensation model is used to correct the temperature deviation of indirect measurement.

[0043] Since noise interference is inevitable when detecting steam temperature, denoising the temperature detection information to reduce the impact of noise and obtain denoised temperature information is beneficial to improving the accuracy of the final steam temperature value.

[0044] Steam temperature detection can be categorized as direct or indirect. Direct detection involves the temperature sensor coming into direct contact with the steam to detect its temperature. Indirect detection involves the temperature sensor detecting the temperature of the steam ablation tube, thereby indirectly determining the temperature of the steam within the tube. Directly detected temperature information directly reflects the steam temperature, and thus the steam temperature value can be obtained based on the corresponding denoised temperature information. Indirectly detected temperature information is then input into a temperature compensation model to perform temperature compensation processing to obtain a steam temperature value reflecting the steam temperature.

[0045] In this way, corresponding processing is performed for different temperature detection methods to obtain a steam temperature value that accurately reflects the steam temperature, which is beneficial to improving the reliability of the steam temperature and further improving the accuracy of steam leakage and blockage judgment.

[0046] In some embodiments of the present invention, a temperature compensation model may be designed based on the empirical temperature difference between the steam ablation tube and the steam temperature therein, that is, the temperature compensation model adds the temperature difference to the temperature value corresponding to the denoised temperature information to correct the temperature deviation of indirect detection and obtain the steam temperature value.

[0047] In some embodiments of the steam ablation leak detection method of the present invention, the step S130 includes: Based on sampling at the same time point, a preset number of first sampling points are extracted from the real-time temperature curve, and a preset number of second sampling points are extracted from the reference temperature curve; Obtaining a correlation calculation value corresponding to a time point based on the first sampling point and the second sampling point corresponding to the same time point, based on correlation operation and recursive operation; The leakage and blockage determination information is obtained according to the correlation calculation value corresponding to each time point.

[0048] When comparing the real-time temperature curve with the reference temperature curve to obtain leakage or blockage determination information, a first discrete point of the real-time temperature curve and a second discrete point of the reference temperature curve are obtained through synchronous sampling. A correlation operation is then performed based on the first and second discrete points to calculate a correlation value, which reflects the degree of correlation between the real-time temperature curve and the reference temperature curve. Based on the calculated correlation value, if the correlation between the real-time temperature curve and the reference temperature curve is low, that is, if the real-time temperature curve deviates significantly from the reference temperature curve, it can be considered that a steam leak or steam blockage has occurred, and leakage or blockage determination information can be obtained accordingly.

[0049] In the process of obtaining the correlation value, recursive operations are combined with correlation operations. The floor cabinet operation can take the time dimension into account when calculating the correlation value, so that the correlation value at each time point inherits the state of the previous moment and integrates new data, thereby accelerating the efficiency of the correlation calculation. Compared with the static correlation operation method alone, the present invention combines correlation and recursive operations to improve the operation efficiency and thus improve the real-time performance of the effect evaluation.

[0050] It should be emphasized that after obtaining the real-time temperature curve, leakage and blockage determination information can be obtained once per unit determination time interval. That is, during the steam ablation process, leakage and blockage determinations are performed periodically to quickly and timely detect steam leaks or steam blockages. It is understandable that the real-time temperature curve is gradually recorded and increased as the steam effect continues. When comparing the real-time temperature curve with the reference temperature curve, the real-time temperature curve is compared with the corresponding part of the reference temperature curve, rather than directly with the complete reference temperature curve. Only when the steam ablation is completed is the real-time temperature curve compared with the complete reference temperature curve.

[0051] It should be noted that the more discrete points sampled, the more accurate the assessment of the correlation between the real-time temperature curve and the reference temperature curve, thereby ensuring the accuracy and reliability of the steam leakage and blockage judgment. Generally speaking, if a static correlation operation method is used to calculate the correlation between the real-time temperature curve and the reference temperature curve, at least 1,000 discrete points are required to perform the operation to ensure that the operation accuracy meets the requirements, which means that at least 1,000 correlation operations need to be performed, resulting in a long operation time, which affects the real-time performance of the steam leakage and blockage judgment. The present invention combines correlation operations with recursive operations. In addition to using the correlation between static discrete points to reflect the correlation between curves, it also uses recursive operations to reflect the correlation between curves from the perspective of time changes, thereby reducing the number of discrete points required to achieve the operation accuracy.

[0052] According to the measured results, the number of discrete points can be reduced to less than 300. By combining correlation operations with recursive operations, calculation results that meet the accuracy requirements can be obtained, and the number of operations can be reduced from at least 1,000 times to less than 300 times, making the real-time performance of steam leakage and blockage judgment at least 3 times higher.

[0053] For a more intuitive understanding, an example is given schematically: in one embodiment of the present invention, when steam leakage occurs, its real-time temperature curve is as follows: Figure 3 As shown in the figure, the real-time temperature curve and the reference temperature curve in the first 1.5 seconds are as follows: Figure 2 As shown, by performing the above correlation operation and recursive operation, a lower correlation calculation value can be obtained, and the leakage and blockage judgment information obtained can be used to determine the occurrence of steam leakage.

[0054] Within 1.5 seconds, the temperature of the steam itself is not particularly high. At the same time, due to factors such as the short time and small amount of steam, the damage caused by leakage is limited and will hardly cause harm to the patient.

[0055] In some embodiments of the steam ablation leak detection method of the present invention, obtaining a correlation calculation value corresponding to a time point based on the first sampling point and the second sampling point corresponding to the same time point based on a correlation operation and a recursive operation includes: Obtaining a measured correlation value at the initial time point based on a correlation operation according to the first sampling point and the second sampling point at the initial time point; Using the measured correlation value at the initial time point as the calculated correlation value at the initial time point; A recursive operation is performed based on the first sampling point, the second sampling point and the correlation calculation value at each time point to obtain the correlation calculation value corresponding to each time point.

[0056] Based on the first and second discrete points obtained at the initial sampling time point, the measured correlation value at the initial time point is calculated and used as the calculated correlation value at the initial time point. The recursive operation uses the measured correlation value and the calculated correlation value at the initial time point as the recursive starting point, and combines the first and second discrete points at each subsequent time point to perform the operation to obtain the calculated correlation value at each time point.

[0057] In this way, the curve similarity evaluation is decomposed into the similarity evaluation of discrete points and the similarity evaluation in time series. Based on recursive operation, the correlation calculation value at the previous moment can be used as prior knowledge and integrated with the measured correlation value at the next time point, so that the obtained correlation calculation value is more accurate, and the accuracy of the calculation results is improved, thereby achieving the effect of reducing the number of discrete points required for calculation, improving calculation efficiency and improving the real-time performance of effect evaluation.

[0058] It should be noted that during the recursive operation, related operations are also performed based on the first discrete point and the second discrete point.

[0059] The measured correlation value is the correlation obtained by calculating the actual detected temperature value, but due to the detection error of the temperature sensor itself in the actual detection, the accuracy of the measured correlation value is relatively low. In the evaluation method of general static correlation operation, it is equivalent to evaluating the effect only by the measured correlation value, so a large number of operations are required to provide enough measured correlation values ​​to meet the accuracy requirements of the effect evaluation. In the present invention, on the basis of the measured correlation value, combined with the recursive operation, the correlation calculation value obtained is obtained on the basis of the static correlation and the correlation in time series, and has a higher accuracy than the measured correlation value, and as the time series of the recursive operation accumulates, the obtained correlation calculation value will be more accurate. Therefore, the present invention combines the correlation operation with the recursive operation, and the obtained correlation calculation value has a higher accuracy, which can effectively reduce the number of discrete points and the number of operations required to achieve the accuracy of the effect evaluation.

[0060] In some embodiments of the steam ablation leak detection method of the present invention, the recursive operation includes: For the next time point, the gain coefficient is calculated based on the detection error value and the prediction error value; Obtaining the corresponding measured correlation value based on a correlation operation according to the first sampling point and the second sampling point corresponding to the current time point; Calculating the correlation calculation value at the current time point according to the measured correlation value, the gain coefficient, and the correlation calculation value at the previous time point; According to the prediction error value and the gain coefficient, the prediction error value is updated until each sampling time point is traversed; The detection error value represents the detection error of the temperature detection information, and the initial value of the prediction error value is a preset value.

[0061] The recursive operation introduces a dynamic gain coefficient adjustment mechanism. The optimal gain coefficient is calculated based on the detection error and prediction error values ​​to balance the weights of the measured correlation value and the historical correlation value. After the correlation value is calculated, the prediction error value is updated to provide feedback for the next time point, thereby improving the accuracy of the correlation value obtained at the next time point.

[0062] In this way, the correlation calculation value is obtained based on the correlation calculation value at the previous time point combined with the measured correlation value at the next time point and the gain coefficient, the purpose of recursive operation is achieved, and the accuracy of the correlation calculation value is improved.

[0063] It should be noted that the detection error value is determined by the temperature sensor's own detection error. Once the temperature sensor model is determined, the detection error value is fixed and can be set via input. The prediction error value is dynamically updated during the recursive operation. At the beginning of the recursive operation, an initial prediction error value can be preset.

[0064] In order to understand the recursive operation more intuitively, it is further explained that the recursive operation process can be implemented by the following expression: in, is the gain coefficient; is the detection error value; is the prediction error value at time point t; Calculate the function for the gain coefficient; is the measured correlation value at time point t; is the first discrete point at time t; is the second discrete point at time t; is the function of related operations; is the calculated value of the correlation at time point t, is the correlation value calculated at time point t-1, that is, the previous time point; is the measured correlation value at time point t; is the prediction error value at time point t+1; is the update function of the prediction error value.

[0065] In some embodiments of the present invention, the gain coefficient may be a Kalman coefficient, and the calculation function of the gain coefficient may be as follows: in, is the Kalman coefficient, is the detection error value; is the prediction error value at time point t.

[0066] In some implementations of the present invention, the update function of the prediction error value is It can be expressed as: in, is the prediction error value at time point t+1; is the gain coefficient; is the prediction error value at time point t.

[0067] In some embodiments of the present invention, the detection error value may be determined by the detection variance, and the correlation operation may be an operation capable of obtaining data correlation, such as calculating a covariance-based correlation coefficient, a Pearson correlation coefficient, or the like.

[0068] In some embodiments of the steam ablation leak detection method of the present invention, before the sampling based on the same time point, the method further includes: The real-time temperature curve and the reference temperature curve are normalized and logarithmically converted.

[0069] Normalization facilitates subsequent correlation and recursive operations, focusing on curve morphology similarity. Since the steam temperature fluctuates significantly within a short period of time during startup and shutdown during steam ablation, logarithmic transformation compresses the dynamic range of the high-value region. Without changing the relative relationship between the data points in the curve, this allows for a more accurate comparison of the real-time temperature curve with the reference temperature curve, resulting in a more accurate similarity calculation value, which helps improve the accuracy of leak and blockage determination information.

[0070] In order to more intuitively understand the process of obtaining effect evaluation information of the present invention, it is further explained: After normalization, the function of the reference temperature curve is: y=f(t). The reference temperature curve is as follows: Figure 2 As shown; the function of the real-time temperature curve is: Y=F(t).

[0071] After logarithmic transformation, the corresponding function of the reference temperature curve is: ln y = f (ln t); the corresponding function of the real-time temperature curve is: ln Y = F (ln t).

[0072] The real-time temperature curve and the reference temperature curve are sampled synchronously at time points t0, t1, ..., t n Sampling is performed to obtain multiple first discrete points A0, ..., A n and corresponding multiple second discrete points B0, ..., B n The number of discrete points sampled is set based on demand, and based on the combination of correlation operation and recursive operation in the present invention, it can be set to less than 300, that is, n≤300.

[0073] According to the first discrete point A0 and the second discrete point B0 corresponding to the initial time point t0, based on the correlation operation, the measured correlation value Z0 of the initial time point t0 and the calculated correlation value of the initial time point t0 are calculated. Take Z0 and determine the detection error value and the initial prediction error value Perform recursive operation: at time point t i(i≥1), calculate the gain coefficient ; Determine the measured correlation value based on the correlation operation calculation ; Calculate and determine the time point t i The calculated correlation value of ; Update the prediction error value ; Traverse each time point and obtain the corresponding correlation calculation value of each time point 、……、 .

[0074] Calculate the value based on the correlation at each time point 、……、 , calculate the average The size of E can reflect the overall similarity between the real-time temperature curve and the reference temperature curve, and thus can evaluate the difference between the steam ablation process corresponding to the real-time temperature curve and the ideal steam ablation process corresponding to the reference temperature curve, thereby achieving the purpose of effect evaluation and generating effect evaluation information.

[0075] In some embodiments of the present invention, the measured correlation value Specifically it can be .

[0076] A steam ablation leakage and blockage detection structure provided by the present invention is described below. The steam ablation leakage and blockage detection structure described below and the steam ablation leakage and blockage detection method described above can correspond to each other.

[0077] refer to Figure 5 The present invention also provides a steam ablation leakage detection structure, comprising: The temperature sensing module 100 is provided in the steam ablation pipe 101; The signal processing module 200 is electrically connected to the temperature sensing module 100; The processing module 300 is electrically connected to the signal processing module 200 , and is used to execute the above-mentioned steam ablation leakage and blockage detection method.

[0078] The temperature sensing module 100 is set in the steam ablation tube 101 to detect the temperature of the steam transmitted by the steam ablation tube 101. The signal processing module 200 converts the temperature detection signal generated by the temperature sensing module 100 into temperature detection information that is convenient for the processing module 300 to process.

[0079] The processing module 300 obtains temperature detection information and, based on this temperature detection information, determines the corresponding steam temperature value. Furthermore, based on the temporal changes in the steam temperature value, a real-time temperature curve is obtained. In the event of a leak or blockage due to steam ablation, the temperature change of the steam will vary. For example, the maximum temperature of the steam will decrease in the case of a steam leak, while the maximum temperature of the steam will increase in the case of a steam blockage. Accordingly, by comparing the real-time temperature curve with the reference temperature curve, the processing module 300 can determine whether there is a steam leak or steam blockage based on the steam temperature changes, thereby obtaining leakage and blockage determination information.

[0080] In this way, by detecting the temperature of the steam and generating a real-time temperature curve, based on the difference between the real-time temperature curve and the reference temperature curve, the effect of detecting whether the steam is leaking or blocked can be achieved, which is conducive to timely and reliable knowledge of steam leakage and steam blockage, thereby ensuring the therapeutic effect of steam ablation and improving the safety and reliability of steam ablation.

[0081] It should be noted that the temperature sensing module 100 may detect the temperature of the steam by an indirect detection method or a direct detection method.

[0082] In some embodiments of the present invention, the signal processing module 200 may include implementations of circuits or devices such as a filter circuit and a temperature detection processing chip. The filter circuit may be a circuit with a filtering function, such as an RC filter circuit, an LC filter circuit, or an active filter circuit, to filter the signal generated by the temperature sensing module 100 to reduce noise interference. The temperature detection processing chip amplifies and performs digital-to-analog conversion on the signal generated by the temperature sensing module 100 to facilitate subsequent processing by the processing module 300. The processing module 300 may include implementations of devices with processing functions, such as a single-chip microcomputer, an embedded chip, a CPU, and an FPGA.

[0083] refer to Figure 6 In some embodiments of a steam ablation leakage detection structure of the present invention, the temperature sensing module 100 includes a metal pipe segment 110 and a first temperature sensor 111. The metal pipe segment 110 is used to be connected in series with the steam ablation pipe 101 and the metal pipe segment 110 allows steam to pass through. The first temperature sensor 111 is arranged on the outer wall surface of the metal pipe segment 110, and the first temperature sensor 111 is electrically connected to the signal processing module 200.

[0084] By placing the first temperature sensor 111 outside the metal pipe section 110, which is connected to the steam ablation pipe 101, the steam flows through the metal pipe section 110 during steam transmission. The first temperature sensor 111 detects the temperature of the metal pipe section 110, thereby indirectly detecting the temperature of the steam in the metal pipe section 110. This achieves indirect detection, that is, non-contact detection of steam temperature. The structure is simple and easy to install and use. The use of the metal pipe section 110, taking advantage of the strong thermal conductivity of metal, can reduce the temperature difference between the metal pipe section 110 and the steam, and make the temperature detection response more rapid, which helps to ensure the real-time performance of steam temperature detection.

[0085] The temperature sensing module 100 may further include an implementation of a circuit or device such as a bridge detection circuit to cooperate with the first temperature sensor 111 to perform temperature detection and generate an electrical signal associated with the temperature for output.

[0086] In some embodiments of a steam ablation leak detection structure of the present invention, the metal pipe segment 110 is made of stainless steel or copper, the inner diameter of the metal pipe segment 110 is less than or equal to 3 mm, and the length of the metal pipe segment 110 ranges from 20 mm to 50 mm.

[0087] The inner diameter of the metal pipe section 110 does not exceed 3 mm, and the length is between 20 mm and 50 mm, so that the length of the metal pipe section 110 is appropriate to avoid being too short, resulting in unreliable connection with the steam transmission pipeline, or too long, resulting in too large a volume and reducing the accuracy of temperature measurement.

[0088] In some embodiments of the present invention, the first temperature sensor 111 comprises a T-type thermocouple. This T-type thermocouple has a measurement range of -200°C to 400°C with an accuracy of ±0.5°C, exhibiting excellent temperature detection performance. When used with a suitable detection circuit, such as a bridge circuit, it can detect temperature changes of 0.1°C or less, demonstrating excellent temperature resolution and facilitating a more accurate real-time temperature curve. In some embodiments, the first temperature sensor 111 may also comprise other temperature detection devices, such as a thermistor.

[0089] refer to Figure 7In some embodiments of a steam ablation leakage detection structure of the present invention, the temperature sensing module 100 includes a connecting pipe section 120, a second temperature sensor 121 and a sealed lead-out structure 122. The connecting pipe section 120 is used to be connected in series with the steam ablation pipe 101. The second temperature sensor 121 is arranged in the connecting pipe section 120. The connecting pipe section 120 is provided with a lead-out hole. The sealed lead-out structure 122 is arranged in the connecting pipe section 120 and the sealed lead-out structure 122 blocks the lead-out hole. The second temperature sensor 121 is electrically connected to the signal processing module 200 through the sealed lead-out structure 122.

[0090] By disposing the second temperature sensor 121 within the connecting pipe section 120, it can directly contact the steam for temperature detection. The sealed lead-out structure 122 electrically connects the second temperature sensor 121 to the signal processing module 200 and ensures the sealing of the connecting pipe section 120, preventing steam leakage as it flows through the connecting pipe section 120. This enables direct, contact-based detection of steam temperature, eliminating the influence of the thermal resistance of the connecting pipe section 120 wall, improving the accuracy of steam temperature detection, and eliminating the need for subsequent temperature compensation, thus simplifying the processing process.

[0091] In some embodiments, the temperature sensing module 100 also includes an implementation of a circuit or device such as a bridge detection circuit to cooperate with the second temperature sensor 121 to perform temperature detection and generate an electrical signal associated with the temperature. At this time, the second temperature sensor 121 is electrically connected to the bridge detection circuit through the sealed lead-out structure 122, and the bridge detection circuit is electrically connected to the signal processing module 200.

[0092] In some embodiments of the present invention, the second temperature sensor 121 may be implemented as a device having a temperature detection function, such as a thermistor or thermocouple. In some embodiments of the present invention, the sealed lead-out structure 122 may include an implementation of a sealing ring and a wire. The second temperature sensor 121 is electrically connected to the signal processing module 200 via the wire. The sealing ring is disposed in the lead-out hole, and the sealing ring squeezes the wall of the lead-out hole and the wire to ensure sealing.

[0093] A steam ablation device provided by the present invention is described below. The steam ablation device described below and the steam ablation leakage and blockage detection method and steam ablation leakage and blockage detection structure described above can correspond to each other.

[0094] The present invention further provides a steam ablation device, comprising a device body, wherein the device body is provided with a steam ablation pipeline 101 and the above-mentioned steam ablation leakage and blockage detection structure.

[0095] The temperature sensing module 100 is set in the steam ablation pipe 101 to detect the temperature of the steam transmitted by the steam ablation pipe 101. The signal processing module 200 converts the temperature detection signal generated by the temperature sensor into temperature detection information that is convenient for the processing module 300 to process. The processing module 300 obtains the temperature detection information, and can determine the corresponding steam temperature value based on the temperature detection information, and then obtain the real-time temperature curve based on the time series change of the steam temperature value. In the case of leakage or blockage in steam ablation, there will be differences in the temperature change of the steam. For example, the maximum temperature of the steam will decrease in the case of steam leakage, and the maximum temperature of the steam will increase in the case of steam blockage. Accordingly, the processing module 300 can determine whether there is steam leakage or steam blockage based on the temperature change of the steam by comparing the real-time temperature curve with the reference temperature curve, and then obtain leakage and blockage judgment information.

[0096] In this way, by detecting the temperature of the steam and generating a real-time temperature curve, based on the difference between the real-time temperature curve and the reference temperature curve, the effect of detecting whether the steam is leaking or blocked can be achieved, which is conducive to timely and reliable knowledge of steam leakage and steam blockage, thereby ensuring the therapeutic effect of steam ablation and improving the safety and reliability of steam ablation.

[0097] Figure 8 An example of a physical structure diagram of an electronic device is shown below. Figure 8 As shown, the electronic device may include: a processor 810, a communications interface 820, a memory 830, and a communication bus 840. The processor 810, the communications interface 820, and the memory 830 communicate with each other via the communication bus 840. The processor 810 may call logic instructions in the memory 830 to execute the above-mentioned steam ablation leak detection method.

[0098] Furthermore, the logic instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product, stored in a storage medium, includes instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0099] On the other hand, the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute a steam ablation leak detection method provided by the above methods.

[0100] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0101] Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented using software plus a necessary general-purpose hardware platform, or of course, hardware. Based on this understanding, the essence of the above technical solution, or the portion that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, or an optical disk, and includes a number of instructions for causing a computer device (such as a personal computer, server, or network device) to execute the methods described in each embodiment or certain portions of the embodiments.

[0102] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0103] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0104] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A steam ablation leak detection method, characterized in that: include: Acquiring temperature detection information, where the temperature detection information represents a steam temperature of steam ablation; Determining a corresponding steam temperature value according to the temperature detection information; Obtaining a real-time temperature curve according to the temporal changes of the steam temperature value; Obtaining leakage and blockage determination information according to the real-time temperature curve and the reference temperature curve; The reference temperature curve represents the steam temperature change when there is no steam leakage and steam blockage.

2. A steam ablation leak detection method according to claim 1, characterized in that: After obtaining leakage and blockage determination information according to the real-time temperature curve and the reference temperature curve, the method further includes: Determining the presence of steam leakage or steam blockage based on the leakage and blockage determination information, generating an interruption instruction and generating an alarm message; The interruption instruction is used to interrupt steam transmission, and the alarm information is used to warn of steam leakage or steam blockage.

3. The steam ablation leak detection method according to claim 1, characterized in that: Determining the corresponding steam temperature value according to the temperature detection information includes: Acquire denoised temperature information based on the temperature detection information and performing denoising processing; When the temperature detection information is generated by directly measuring the steam temperature, obtaining the steam temperature value according to the denoised temperature information; When the temperature detection information is generated by indirectly measuring the steam temperature, processing is performed based on a preset temperature compensation model according to the denoised temperature information to obtain the steam temperature value; The preset temperature compensation model is used to correct the temperature deviation of indirect measurement.

4. The steam ablation leak detection method according to claim 1, characterized in that: The obtaining leakage and blockage determination information according to the real-time temperature curve and the reference temperature curve includes: Based on sampling at the same time point, a preset number of first sampling points are extracted from the real-time temperature curve, and a preset number of second sampling points are extracted from the reference temperature curve; Obtaining a correlation calculation value corresponding to a time point based on the first sampling point and the second sampling point corresponding to the same time point, based on correlation operation and recursive operation; The leakage and blockage determination information is obtained according to the correlation calculation value corresponding to each time point.

5. The steam ablation leak detection method according to claim 4, characterized in that: The step of obtaining a correlation calculation value corresponding to a time point based on the first sampling point and the second sampling point corresponding to the same time point by performing a correlation operation and a recursive operation includes: Obtaining a measured correlation value at the initial time point based on a correlation operation according to the first sampling point and the second sampling point at the initial time point; Using the measured correlation value at the initial time point as the calculated correlation value at the initial time point; A recursive operation is performed based on the first sampling point, the second sampling point and the correlation calculation value at each time point to obtain the correlation calculation value corresponding to each time point.

6. The steam ablation leak detection method according to claim 5, characterized in that: The recursive operation includes: For the next time point, the gain coefficient is calculated based on the detection error value and the prediction error value; Obtaining the corresponding measured correlation value based on a correlation operation according to the first sampling point and the second sampling point corresponding to the current time point; Calculating the correlation calculation value at the current time point according to the measured correlation value, the gain coefficient, and the correlation calculation value at the previous time point; According to the prediction error value and the gain coefficient, the prediction error value is updated until each sampling time point is traversed; The detection error value represents the detection error of the temperature detection information, and the initial value of the prediction error value is a preset value.

7. The steam ablation leak detection method according to claim 4, characterized in that: Before the sampling based on the same time point, the method further includes: The real-time temperature curve and the reference temperature curve are normalized and logarithmically converted.

8. A steam ablation leak detection structure, characterized in that: include: A temperature sensing module is provided in the steam ablation pipeline; a signal processing module, electrically connected to the temperature sensing module; A processing module is electrically connected to the signal processing module, and the processing module is used to execute the steam ablation leakage detection method according to any one of claims 1 to 7.

9. The steam ablation leakage detection structure according to claim 8, characterized in that: The temperature sensing module includes a metal pipe segment and a first temperature sensor. The metal pipe segment is used to be connected in series with the steam ablation pipeline and allows steam to pass through. The first temperature sensor is arranged on the outer wall of the metal pipe segment and is electrically connected to the signal processing module.

10. The steam ablation leakage detection structure according to claim 8, characterized in that: The temperature sensing module includes a connecting pipe section, a second temperature sensor and a sealed lead-out structure. The connecting pipe section is used to be connected in series with the steam ablation pipe. The second temperature sensor is arranged in the connecting pipe section. The connecting pipe section is provided with a lead-out hole. The sealed lead-out structure is arranged in the connecting pipe section and the sealed lead-out structure blocks the lead-out hole. The second temperature sensor is electrically connected to the signal processing module through the sealed lead-out structure.

11. A steam ablation device, characterized in that: The device comprises a device body, wherein the device body is provided with a steam ablation pipeline and a steam ablation leakage detection structure according to any one of claims 8 to 10.

12. An electronic device comprising a memory, a processor, and a program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steam ablation leakage detection method according to any one of claims 1 to 7 is implemented.

13. A non-transitory readable storage medium having a program stored thereon, characterized in that: When the program is executed by a processor, a steam ablation leakage detection method as claimed in any one of claims 1 to 7 is implemented.

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