CN114587565B - Temperature control method and system in radio frequency ablation - Google Patents
Temperature control method and system in radio frequency ablation Download PDFInfo
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Abstract
The application provides a temperature control method and a temperature control system in radio frequency ablation, which are used for acquiring the temperature of an electrode needle acquired by a temperature sensor, judging whether the temperature is higher than a set first safety temperature, if so, stopping outputting power to the electrode needle, otherwise, determining the ablation area of a current frame of Nakagami parameter image and the difference value between the average value in the current frame of Nakagami parameter image and the average value in the previous frame of Nakagami parameter image, and controlling the power output of a radio frequency ablation instrument according to the ablation area, the difference value and the temperature to realize the control of the temperature of the radio frequency ablation instrument. According to the application, the real-time control of the temperature is realized according to the analysis of the real-time image of the radio frequency ablation.
Description
Technical Field
The application relates to the field of medical equipment, in particular to a temperature control method and a temperature control system in radio frequency ablation.
Background
The ablation is to damage the tissue of the focus and then absorb the tissue by the body, so as to achieve the effect of eliminating the focus, and the ablation operation has the characteristics of small wound, quick recovery and the like. According to the principle of ablation, the ablation can be divided into cryoablation, radio frequency ablation, laser ablation, pulse ablation and the like, wherein radio frequency ablation is the most widely applied ablation technique. The radio frequency ablation is to emit high-frequency electromagnetic field from electrode needle at focus, and the molecules in tissue move under the action of electromagnetic field to generate heat, so that the cells from the focus are dehydrated and coagulated, the temperature control is critical to the radio frequency ablation, if the temperature is too low, the focus is not thoroughly removed, secondary or multiple ablations are needed, and if the temperature is too high, the damage and even carbonization to healthy tissue can be caused.
The current temperature control method is that a temperature sensor is arranged in an electrode head, a radio frequency ablation instrument controls power or temperature according to the temperature of the sensor, but after temperature parameters such as blocking temperature and temperature rising rate are set, the radio frequency ablation instrument only controls the temperature according to the set parameters, however, in clinical practice, different patients, different focus positions, different causes and different doctor operation habits have different requirements on the temperature, human tissues are extremely sensitive to the temperature, and the radio frequency ablation instrument cannot be automatically adjusted according to the operation condition, so that the radio frequency ablation operation effect is influenced. The radio frequency ablation temperature control system cannot acquire the temperature conditions of tissues and cells around the electrode needle in real time, and how to control the temperature according to the real-time conditions in the operation process is a problem to be solved in the field.
Disclosure of Invention
In order to solve the above problems, the present application provides a temperature control method in radio frequency ablation, which is applied to radio frequency ablation equipment, and the method comprises the following steps:
s1, acquiring the temperature of an electrode needle acquired by a temperature sensor, judging whether the temperature is higher than a set first safety temperature, if so, stopping outputting power to the electrode needle, otherwise, executing S2;
s2, acquiring an ultrasonic radio frequency echo signal, processing the ultrasonic radio frequency echo signal to obtain an ultrasonic Nakagami parameter image, and obtaining an ablation region of the parameter image by adopting an image segmentation method; calculating the ablation area s of the Nakagami parameter image of the current frame, and the average value in the Nakagami parameter image of the current frameThe difference Deltad of the average value in the Nakagami parameter image of the previous frame is the area s taking the electrode needle as the center point in the Nakagami parameter image 0 Average of the inner values;
s3, if S is less than or equal to S 0 According to the formula p=p 0 (1+e -|Δd| ) Calculating output power; otherwise, s and s are calculated 0 Is according to the formula p=p 0 e -Δs Calculating output power, wherein P 0 For a rated power determined from a set second temperature, the second temperature is less than the first safe temperature.
Preferably, the processing the ultrasonic radio frequency echo signal to obtain an ultrasonic Nakagami parameter image specifically includes:
s21, acquiring an ultrasonic radio frequency echo acquisition period T1 and time T2 from the completion of acquiring an ultrasonic radio frequency echo to the generation of an ultrasonic Nakagami parameter image, and executing S22 if T2 is more than k1.T1, wherein k1 is an acceleration adjustment factor, 0< k1<1;
s22, according to a predetermined ROI region of the ultrasonic Nakagami parameter image, processing ultrasonic radio frequency echoes belonging to the ROI region to obtain an ultrasonic Nakagami parameter image of the ROI region, and replacing the corresponding ROI region in the ultrasonic Nakagami parameter image of the previous frame by using the ultrasonic Nakagami parameter image of the ROI region.
Preferably, the ROI area according to the predetermined ultrasonic Nakagami parameter image is specifically: the ROI region R1 is determined according to the CT or MRI image, then the CT or MRI image is registered with the ultrasonic Nakagami parameter image, and the ROI region in the ultrasonic Nakagami parameter image is determined according to the position of the R1.
Preferably, in S3, it includes: the ablation area s, the difference Δd, the temperature of the electrode needle and the output power are continuously recorded in a database.
Preferably, a data correlation analysis method is used to perform a correlation analysis on the ablation area s, the difference Δd, the temperature of the electrode needle, and the output power.
In another aspect, the present application provides a temperature control system in radio frequency ablation, applied to radio frequency ablation equipment, the system comprising the following modules:
the power output fusing module is used for acquiring the temperature of the electrode needle acquired by the temperature sensor, judging whether the temperature is higher than a set first safety temperature, if so, stopping outputting power to the electrode needle, otherwise, executing the Nakagami parameter image generation module;
the Nakagami parameter image generation module is used for acquiring an ultrasonic radio frequency echo signal, processing the ultrasonic radio frequency echo signal to obtain an ultrasonic Nakagami parameter image, and obtaining an ablation area of the parameter image by adopting an image segmentation method; calculating the ablation area s of the current frame Nakagami parameter image and the difference delta d between the average value in the current frame Nakagami parameter image and the average value in the previous frame Nakagami parameter image, wherein the average value is the area s taking the electrode needle as the center point in the Nakagami parameter image 0 Average of the inner values;
a temperature control module for controlling the temperature of the liquid crystal display device when s is less than or equal to s 0 When according to the formula p=p 0 (1+e -|Δd| ) Calculating output power; otherwise, s and s are calculated 0 Is according to the formula p=p 0 e -Δs Calculating output power, wherein P 0 For a rated power determined from a set second temperature, the second temperature is less than the first safe temperature.
Preferably, the processing the ultrasonic radio frequency echo signal to obtain an ultrasonic Nakagami parameter image specifically includes the following units:
the time judging unit is used for acquiring an ultrasonic radio frequency echo acquisition period T1 and time T2 from the completion of the acquisition of the ultrasonic radio frequency echo to the generation of an ultrasonic Nakagami parameter image, and executing an acceleration unit if T2 is more than k1 & T1, wherein k1 is an acceleration adjustment factor, and 0< k1<1;
and the acceleration unit is used for processing the ultrasonic radio frequency echo belonging to the ROI region according to the pre-determined ROI region of the ultrasonic Nakagami parameter image to obtain the ultrasonic Nakagami parameter image of the ROI region, and replacing the corresponding ROI region in the previous frame of ultrasonic Nakagami parameter image by using the ultrasonic Nakagami parameter image of the ROI region.
Preferably, the ROI area according to the predetermined ultrasonic Nakagami parameter image is specifically: the ROI region R1 is determined according to the CT or MRI image, then the CT or MRI image is registered with the ultrasonic Nakagami parameter image, and the ROI region in the ultrasonic Nakagami parameter image is determined according to the position of the R1.
Preferably, in S3, it includes: the ablation area s, the difference Δd, the temperature of the electrode needle and the output power are continuously recorded in a database.
Preferably, a data correlation analysis method is used to perform a correlation analysis on the ablation area s, the difference Δd, the temperature of the electrode needle, and the output power.
Finally, the application also provides a computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method as described above.
Aiming at the problem that the temperature cannot be regulated in real time according to the ablation condition in the conventional radio frequency ablation, the application provides a temperature control method and a temperature control system in the radio frequency ablation.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of a first embodiment;
FIG. 2 is a schematic view of image segmentation;
FIG. 3 is a schematic diagram of a region of ROI;
fig. 4 is a schematic view of original image segmentation.
Detailed Description
In this document, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
In a first embodiment, as shown in fig. 1, the present application provides a temperature control method in radio frequency ablation, which is applied to radio frequency ablation equipment, and the method includes the following steps:
s1, acquiring the temperature of an electrode needle acquired by a temperature sensor, judging whether the temperature is higher than a set first safety temperature, if so, stopping outputting power to the electrode needle, otherwise, executing S2;
in radiofrequency thermal ablation, the electrode needle outputs power to heat at a diseased position, and after a certain temperature is reached, for example, cells are dehydrated, denatured and dead at 60 ℃, and carbonization of the cells occurs at a temperature exceeding 100 ℃, but because radiofrequency ablation is in a human body, the temperature cannot be very high, and the first safe temperature is used for avoiding injury to the human body.
S2, acquiring an ultrasonic radio frequency echo signal, processing the ultrasonic radio frequency echo signal to obtain an ultrasonic Nakagami parameter image, and obtaining an ablation region of the parameter image by adopting an image segmentation method; calculating the ablation area s of the current frame Nakagami parameter image and the difference delta d between the average value in the current frame Nakagami parameter image and the average value in the previous frame Nakagami parameter image, wherein the average value is the area s taking the electrode needle as the center point in the Nakagami parameter image 0 Average of the inner values;
CT (Computed Tomography), MRI (Magnetic Resonance Imaging) and ultrasonic waves can obtain images of human bodies, and because CT and MRI radiate the human bodies, the imaging speed is low, the cost is high and the like, the ultrasonic waves have better real-time performance and lower cost, do not radiate the human bodies basically, and are generally used for guiding the operation during the radio frequency ablation in clinic. However, the ultrasonic imaging has poor definition and is not easy to observe, and particularly bubbles are generated when radio frequency ablation is performed, which affects the judgment of doctors.
However, the ultrasonic Nakagami parameter image has better definition, as shown in fig. 2, the ultrasonic Nakagami parameter image is a map of the detected ultrasonic wave in the Nakagami distribution model m parameter by utilizing the characteristic of the back scattering signal statistical distribution of the ultrasonic wave and adopting a Nakagami statistical model to realize the monitoring of the thermal ablation region.
In the radio frequency thermal ablation, the condition of the radio frequency ablation can be clearly observed through an ultrasonic Nakagami parameter image, and the temperature is controlled according to the condition of the radio frequency ablation. Specifically, the ultrasonic Nakagami parameter image is segmented to obtain an ablation region, and the area of the ablation region is calculated.
Then, an average value of pixel points of an ablation region in the ultrasonic Nakagami image, such as an area s of the current ultrasonic Nakagami image frame centered on the electrode needle, is obtained 0 The interior of the display comprises 100 pixel points, and the pixel points are divided by 100 after being accumulated, namelyThe average value of the current ultrasonic Nakagami parameter image is obtained, and similarly, the average value of the ultrasonic Nakagami parameter image of the previous frame can be obtained, and the difference Δd is obtained.
S3, if S is less than or equal to S 0 According to the formula p=p 0 (1+e -|Δd| ) Calculating output power; otherwise, s and s are calculated 0 Is according to the formula p=p 0 e -Δs Calculating output power, wherein P 0 For a rated power determined from a set second temperature, the second temperature is less than the first safe temperature.
If the current ablation area is less than the threshold s 0 Indicating that at the beginning of ablation, ablation needs to be continued, the formula p=p 0 (1+e -|Δd| ) The Δd in (2) is used for avoiding the problems of injury to human bodies or poor treatment effect caused by too strong change of power.
If the current ablation area is greater than or equal to the threshold s 0 Indicating that the temperature is gradually reduced at the end stage of ablation, and when the current ablation area is equal to the threshold s 0 The larger the phase difference, the smaller the output power. Furthermore, the power output of the radio frequency ablation instrument is adjusted according to the real-time condition of ablation, and the problem that the temperature cannot be adjusted in real time is solved.
Because of the real-time requirement, a faster processing speed of the system is required, and in one embodiment, the processing of the ultrasonic rf echo signal obtains an ultrasonic Nakagami parameter image, specifically:
s21, acquiring an ultrasonic radio frequency echo acquisition period T1 and time T2 from the completion of acquiring an ultrasonic radio frequency echo to the generation of an ultrasonic Nakagami parameter image, and executing S22 if T2 is more than k1.T1, wherein k1 is an acceleration adjustment factor, 0< k1<1;
s22, according to a predetermined ROI region of the ultrasonic Nakagami parameter image, processing ultrasonic radio frequency echoes belonging to the ROI region to obtain an ultrasonic Nakagami parameter image of the ROI region, and replacing the corresponding ROI region in the ultrasonic Nakagami parameter image of the previous frame by using the ultrasonic Nakagami parameter image of the ROI region.
The ROI area according to the predetermined ultrasonic Nakagami parameter image is specifically: the ROI area R1 is determined from the CT or MRI image, and then the CT or MRI image is registered with the ultrasonic Nakagami parameter image, and the ROI area in the ultrasonic Nakagami parameter image is determined from the position of R1, as shown in fig. 3.
It should be noted that, in the present application, the ROI area, the ablation area s, is three different concepts, wherein the ROI is a region of interest determined in an ultrasonic Nakagami parameter image according to CT/MRI, the ablation area is a region of the ultrasonic Nakagami parameter image obtained by image segmentation during the ablation process, the ablation area s is an area within a preset distance with the electrode needle as a center point, and the size relationship is that the ROI includes the ablation area s. As shown in fig. 3, the box is the ROI area, and the irregular boundary within the box is the ablation area.
To facilitate subsequent analysis of the data, the system is modified, and in one embodiment of the present application, in S3, it includes: the ablation area s, the difference Δd, the temperature of the electrode needle and the output power are continuously recorded in a database.
And performing correlation analysis on the ablation area s, the difference value delta d, the temperature of the electrode needle and the output power by adopting a data correlation analysis method.
In a second embodiment, the application provides a temperature control system in radio frequency ablation, which is applied to radio frequency ablation equipment, and comprises the following modules:
the power output fusing module is used for acquiring the temperature of the electrode needle acquired by the temperature sensor, judging whether the temperature is higher than a set first safety temperature, if so, stopping outputting power to the electrode needle, otherwise, executing the Nakagami parameter image generation module;
the Nakagami parameter image generation module is used for acquiring an ultrasonic radio frequency echo signal, processing the ultrasonic radio frequency echo signal to obtain an ultrasonic Nakagami parameter image, and obtaining an ablation area of the parameter image by adopting an image segmentation method; calculating the Nakagami parameter image of the current frameAn ablation area s, and a difference Deltad between an average value in a previous frame Nakagami parameter image and an average value in a previous frame Nakagami parameter image, the average value being the area s of the Nakagami parameter image centered on the electrode needle 0 Average of the inner values;
a temperature control module for controlling the temperature of the liquid crystal display device when s is less than or equal to s 0 When according to the formula p=p 0 (1+e -|Δd| ) Calculating output power; otherwise, s and s are calculated 0 Is according to the formula p=p 0 e -Δs Calculating output power, wherein P 0 For a rated power determined from a set second temperature, the second temperature is less than the first safe temperature.
In a specific embodiment, the processing the ultrasonic radio frequency echo signal to obtain an ultrasonic Nakagami parameter image specifically includes the following units:
the time judging unit is used for acquiring an ultrasonic radio frequency echo acquisition period T1 and time T2 from the completion of the acquisition of the ultrasonic radio frequency echo to the generation of an ultrasonic Nakagami parameter image, and executing an acceleration unit if T2 is more than k1 & T1, wherein k1 is an acceleration adjustment factor, and 0< k1<1;
and the acceleration unit is used for processing the ultrasonic radio frequency echo belonging to the ROI region according to the pre-determined ROI region of the ultrasonic Nakagami parameter image to obtain the ultrasonic Nakagami parameter image of the ROI region, and replacing the corresponding ROI region in the previous frame of ultrasonic Nakagami parameter image by using the ultrasonic Nakagami parameter image of the ROI region.
In a specific embodiment, the ROI area according to the predetermined ultrasound Nakagami parameter image is specifically: the ROI region R1 is determined according to the CT or MRI image, then the CT or MRI image is registered with the ultrasonic Nakagami parameter image, and the ROI region in the ultrasonic Nakagami parameter image is determined according to the position of the R1.
In a specific embodiment, in S3, it includes: the ablation area s, the difference Δd, the temperature of the electrode needle and the output power are continuously recorded in a database.
In a specific embodiment, a data correlation analysis method is used to perform a correlation analysis on the ablation area s, the difference Δd, the temperature of the electrode needle, and the output power.
In a third embodiment, the present application provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a method as described in the first embodiment.
The above-described embodiment of the apparatus is merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by adding necessary general purpose hardware platforms, or may be implemented by a combination of hardware and software. Based on such understanding, the foregoing aspects, in essence and portions contributing to the art, may be embodied in the form of a computer program product, which may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims (10)
1. A temperature control method in radio frequency ablation, which is applied to radio frequency ablation equipment, and is characterized by comprising the following steps:
s1, acquiring the temperature of an electrode needle acquired by a temperature sensor, judging whether the temperature is higher than a set first safety temperature, if so, stopping outputting power to the electrode needle, otherwise, executing S2;
s2, acquiring an ultrasonic radio frequency echo signal, processing the ultrasonic radio frequency echo signal to obtain an ultrasonic Nakagami parameter image, and obtaining an ablation region of the parameter image by adopting an image segmentation method; calculating the ablation area s of the current frame Nakagami parameter image and the difference delta d between the average value in the current frame Nakagami parameter image and the average value in the previous frame Nakagami parameter image, wherein the average value is the area s taking the electrode needle as the center point in the Nakagami parameter image 0 An average value of the values of the inner pixels;
s3, if S is less than or equal to S 0 According to the formula p=p 0 (1+e -|Δd| ) Calculating output power; otherwise, s and s are calculated 0 Is according to the formula p=p 0 e -Δs Calculating output power, wherein P 0 For a rated power determined from a set second temperature, the second temperature is less than the first safe temperature.
2. The method according to claim 1, wherein the processing of the ultrasonic radio frequency echo signal obtains an ultrasonic Nakagami parameter image, specifically:
s21, acquiring an ultrasonic radio frequency echo acquisition period T1 and time T2 from the completion of acquiring an ultrasonic radio frequency echo to the generation of an ultrasonic Nakagami parameter image, and executing S22 if T2 is more than k1.T1, wherein k1 is an acceleration adjustment factor, 0< k1<1;
s22, according to a predetermined ROI region of the ultrasonic Nakagami parameter image, processing ultrasonic radio frequency echoes belonging to the ROI region to obtain an ultrasonic Nakagami parameter image of the ROI region, and replacing the corresponding ROI region in the ultrasonic Nakagami parameter image of the previous frame by using the ultrasonic Nakagami parameter image of the ROI region.
3. The method according to claim 2, wherein the ROI area according to the predetermined ultrasound Nakagami parameter image is specifically: the ROI region R1 is determined according to the CT or MRI image, then the CT or MRI image is registered with the ultrasonic Nakagami parameter image, and the ROI region in the ultrasonic Nakagami parameter image is determined according to the position of the R1.
4. The method of claim 1, comprising, in S3: the ablation area s, the difference Δd, the temperature of the electrode needle and the output power are continuously recorded in a database.
5. The method of claim 4, wherein the ablation area s, the difference Δd, the temperature of the electrode needle, and the output power are correlated using a data correlation analysis method.
6. A temperature control system in radio frequency ablation, which is applied to radio frequency ablation equipment, and is characterized by comprising the following modules:
the power output fusing module is used for acquiring the temperature of the electrode needle acquired by the temperature sensor, judging whether the temperature is higher than a set first safety temperature, if so, stopping outputting power to the electrode needle, otherwise, executing the Nakagami parameter image generation module;
the Nakagami parameter image generation module is used for acquiring an ultrasonic radio frequency echo signal, processing the ultrasonic radio frequency echo signal to obtain an ultrasonic Nakagami parameter image, and obtaining an ablation area of the parameter image by adopting an image segmentation method; calculating the ablation area s of the current frame Nakagami parameter image and the difference delta d between the average value in the current frame Nakagami parameter image and the average value in the previous frame Nakagami parameter image, wherein the average value is the area s taking the electrode needle as the center point in the Nakagami parameter image 0 An average value of the values of the inner pixels;
a temperature control module for controlling the temperature of the liquid crystal display device when s is less than or equal to s 0 When according to the formula p=p 0 (1+e -Δd ) Calculating output power; otherwise, s and s are calculated 0 Is according to the formulap＝P 0 e -Δs Calculating output power, wherein P 0 For a rated power determined from a set second temperature, the second temperature is less than the first safe temperature.
7. The system according to claim 6, wherein the processing of the ultrasonic radio frequency echo signal results in an ultrasonic Nakagami parameter image, specifically comprising the following units:
the time judging unit is used for acquiring an ultrasonic radio frequency echo acquisition period T1 and time T2 from the completion of the acquisition of the ultrasonic radio frequency echo to the generation of an ultrasonic Nakagami parameter image, and executing an acceleration unit if T2 is more than k1 & T1, wherein k1 is an acceleration adjustment factor, and 0< k1<1;
and the acceleration unit is used for processing the ultrasonic radio frequency echo belonging to the ROI region according to the pre-determined ROI region of the ultrasonic Nakagami parameter image to obtain the ultrasonic Nakagami parameter image of the ROI region, and replacing the corresponding ROI region in the previous frame of ultrasonic Nakagami parameter image by using the ultrasonic Nakagami parameter image of the ROI region.
8. The system according to claim 7, wherein the ROI area according to the predetermined ultrasound Nakagami parameter image is specifically: the ROI region R1 is determined according to the CT or MRI image, then the CT or MRI image is registered with the ultrasonic Nakagami parameter image, and the ROI region in the ultrasonic Nakagami parameter image is determined according to the position of the R1.
9. The system according to any one of claims 6-8, characterized in that in S3 it comprises: the ablation area s, the difference Δd, the temperature of the electrode needle and the output power are continuously recorded in a database.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the program, when being executed by a processor, implements the method according to any one of claims 1 to 5.
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012092444A2 (en) * | 2010-12-31 | 2012-07-05 | Volcano Corporation | Diagnostic and therapeutic methods, devices, and systems for multiple sclerosis, deep vein thrombosis, and pulmonary embolism patients |
| CN102781358A (en) * | 2010-02-05 | 2012-11-14 | 皇家飞利浦电子股份有限公司 | Combined ablation and ultrasound imaging |
| CN106037815A (en) * | 2016-05-17 | 2016-10-26 | 西安交通大学 | Ultrasonic echo statistical parameter imaging system and method for thermal coagulation monitoring |
| CN106264722A (en) * | 2016-08-31 | 2017-01-04 | 天津大学 | Window modulation combines Gauss polynomial matching monitoring radio frequency ablation device and method |
| CN107427280A (en) * | 2015-02-27 | 2017-12-01 | 皇家飞利浦有限公司 | For the system and method for the adaptive ablation and treatment that are monitored based on elastogram |
| CN107822707A (en) * | 2017-11-30 | 2018-03-23 | 中国科学技术大学 | A kind of RF ablation method and system |
| CN108324366A (en) * | 2017-12-13 | 2018-07-27 | 武汉市海沁医疗科技有限公司 | Radio-frequency ablation electrode and its control system |
| CN109171998A (en) * | 2018-10-22 | 2019-01-11 | 西安交通大学 | Heating ablation region recognition monitoring imaging method and system based on ultrasonic deep learning |
| CN208541402U (en) * | 2017-11-30 | 2019-02-26 | 中国科学技术大学 | A kind of radio frequency ablation system |
| BR112012005507A2 (en) * | 2009-09-15 | 2019-09-24 | Koninklijke Philps Electronics N V | medium ultrasound device, medical system, method of operating a medical device and computer program product |
| CN110465008A (en) * | 2019-08-28 | 2019-11-19 | 黄晶 | A kind of focusing ultrasonic therapeutic system |
| CN112842517A (en) * | 2021-02-22 | 2021-05-28 | 河南省中医院（河南中医药大学第二附属医院） | Minimally invasive adenoid ablation device |
| US11123046B1 (en) * | 2020-05-05 | 2021-09-21 | Techsomed Medical Technologies Ltd. | Monitoring thermal ablation using registration of B-mode ultrasound images |
| CN113749754A (en) * | 2021-09-15 | 2021-12-07 | 万东百胜(苏州)医疗科技有限公司 | Method for extracting temperature information in ultrasonic radio frequency signal based on convolutional neural network |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9504518B2 (en) * | 2010-11-29 | 2016-11-29 | Medtronic Ablation Frontiers Llc | System and method for adaptive RF ablation |
| CN111214288A (en) * | 2019-12-24 | 2020-06-02 | 杭州诺诚医疗器械有限公司 | Radio frequency ablation power output control method and device and radio frequency ablation system |
| US11439308B2 (en) * | 2020-07-13 | 2022-09-13 | GE Precision Healthcare LLC | Methods and systems for thermal monitoring of tissue with an ultrasound imaging system |
-
2022
- 2022-03-01 CN CN202210194813.3A patent/CN114587565B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BR112012005507A2 (en) * | 2009-09-15 | 2019-09-24 | Koninklijke Philps Electronics N V | medium ultrasound device, medical system, method of operating a medical device and computer program product |
| CN102781358A (en) * | 2010-02-05 | 2012-11-14 | 皇家飞利浦电子股份有限公司 | Combined ablation and ultrasound imaging |
| WO2012092444A2 (en) * | 2010-12-31 | 2012-07-05 | Volcano Corporation | Diagnostic and therapeutic methods, devices, and systems for multiple sclerosis, deep vein thrombosis, and pulmonary embolism patients |
| CN107427280A (en) * | 2015-02-27 | 2017-12-01 | 皇家飞利浦有限公司 | For the system and method for the adaptive ablation and treatment that are monitored based on elastogram |
| CN106037815A (en) * | 2016-05-17 | 2016-10-26 | 西安交通大学 | Ultrasonic echo statistical parameter imaging system and method for thermal coagulation monitoring |
| CN106264722A (en) * | 2016-08-31 | 2017-01-04 | 天津大学 | Window modulation combines Gauss polynomial matching monitoring radio frequency ablation device and method |
| CN208541402U (en) * | 2017-11-30 | 2019-02-26 | 中国科学技术大学 | A kind of radio frequency ablation system |
| CN107822707A (en) * | 2017-11-30 | 2018-03-23 | 中国科学技术大学 | A kind of RF ablation method and system |
| CN108324366A (en) * | 2017-12-13 | 2018-07-27 | 武汉市海沁医疗科技有限公司 | Radio-frequency ablation electrode and its control system |
| CN109171998A (en) * | 2018-10-22 | 2019-01-11 | 西安交通大学 | Heating ablation region recognition monitoring imaging method and system based on ultrasonic deep learning |
| CN110465008A (en) * | 2019-08-28 | 2019-11-19 | 黄晶 | A kind of focusing ultrasonic therapeutic system |
| US11123046B1 (en) * | 2020-05-05 | 2021-09-21 | Techsomed Medical Technologies Ltd. | Monitoring thermal ablation using registration of B-mode ultrasound images |
| CN112842517A (en) * | 2021-02-22 | 2021-05-28 | 河南省中医院（河南中医药大学第二附属医院） | Minimally invasive adenoid ablation device |
| CN113749754A (en) * | 2021-09-15 | 2021-12-07 | 万东百胜(苏州)医疗科技有限公司 | Method for extracting temperature information in ultrasonic radio frequency signal based on convolutional neural network |
Non-Patent Citations (3)
| Title |
|---|
| 《基于Nakagami成像纹理特征检测微波热消融凝固区的方法研究》;王赫，周著黄，吴水才;《医疗卫生装备》;第42卷(第02期);1-6+12 * |
| 《基于超声回波去相关成像的微波消融实时监测》;王月，周著黄，吴水才;《北京生物医学工程》;第37卷(第06期);575-580 * |
| 卓禹心.《基于超声谐波包络Nakagami参数成像自动分割的微波消融监测》.《中国优秀硕士学位论文全文数据库信息科技辑》.2021,(第12期),80. * |
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