Three-Dimensional Thermal Field Modeling Method of Thermal Ablation Probe Based on Infrared Thermal Image

Abstract

The present invention discloses a three-dimensional thermal field modeling method for a thermal ablation probe based on an infrared thermal image. The method includes the following steps: cutting a thermal ablation experimental object into a block with at least one plane; using the plane as a reference plane, inserting a thermal ablation probe from the non-reference surface of the thermal ablation experimental object into the interior of the thermal ablation experimental object, such that the needle tip of the thermal ablation probe is located at a detection point at a predetermined dimension from the reference plane; connecting a power supply to the thermal ablation probe to cause the needle tip to generate heat at a predetermined power; after waiting for a predetermined time, taking and storing an infrared thermal image on the reference plane; sequentially repeating the foregoing steps for a plurality of other thermal ablation experimental objects, wherein the distance from the detection point of each thermal ablation experimental object to the reference plane is different; performing a superposition process on all the stored infrared thermal images, thereby establishing a three-dimensional thermal field model of the needle tip at the predetermined power. Through the present invention, it is possible to conveniently master the thermal field temperature distribution of the thermal ablation probe at different powers.

Description

Technical Field

[0001] The invention relates to the technical field of thermal ablation probes, and in particular to a three-dimensional thermal field modeling method of a thermal ablation probe based on infrared thermal images. Background Art

[0002] Thermal ablation refers to a technique that uses thermal effects to cause coagulation, necrosis, vaporization, or carbonization of diseased tissue to achieve the purpose of ablation and inactivation treatment. In thermal ablation, the thermal field temperature distribution of the thermal ablation probe directly determines the location, size, and shape of the ablation focus. Therefore, before performing thermal ablation, it is important to understand the thermal field temperature distribution of the thermal ablation probe at different powers in advance, which is of great significance for effectively controlling the size of the ablation area and thus improving the success rate of the operation. Summary of the invention

[0003] In view of this, an object of the present invention is to provide a three-dimensional thermal field modeling method of a thermal ablation probe based on infrared thermographs, so as to grasp the three-dimensional thermal field temperature distribution of the thermal ablation probe under a predetermined power.

[0004] In order to achieve the above-mentioned object of the invention, a method for three-dimensional thermal field modeling of a thermal ablation probe based on infrared thermal imaging provided by the present invention may include the following steps: step S100, cutting a thermal ablation test body into a block having at least one plane; step S200, taking the plane as a reference plane, inserting a thermal ablation probe from a non-reference plane of the thermal ablation test body into the interior of the thermal ablation test body, so that the needle of the thermal ablation probe is located at a detection point with a predetermined size from the reference plane; step S300, connecting power to the thermal ablation probe, so that the needle generates heat at a predetermined power; step S400, after waiting for a predetermined time, taking an infrared thermal image of the reference plane by using an infrared thermal imager and storing the image; step S500, repeating steps S100 to S400 for a plurality of other thermal ablation test bodies in sequence, wherein the distance from the detection point of each thermal ablation test body to the reference plane is different; and step S600, superimposing all the stored infrared thermal images by a computer simulation program, so as to establish a three-dimensional thermal field model of the needle at the predetermined power.

[0005] Preferably, in the step S200, the thermal ablation probe is inserted from a side of the thermal ablation test body, and the thermal ablation probe is kept parallel to the reference plane.

[0006] Preferably, in step S500, the distance from the detection point of the current thermal ablation test object to the reference plane is greater than the distance from the detection point of the previous thermal ablation test object to the reference plane.

[0007] Preferably, in step S600, when the infrared thermal imager cannot capture the infrared thermal image caused by the needle heating on the reference plane of the thermal ablation experimental object, all the stored infrared thermal images are superimposed through a computer simulation program, so as to establish a three-dimensional thermal field model of the needle at the predetermined power.

[0008] Preferably, the difference between the distance from the detection point of the current thermal ablation experimental object to the reference plane and the distance from the detection point of the previous thermal ablation experimental object to the reference plane is a preset value.

[0009] Preferably, in the step S100, the thermal ablation experimental object is cut into a block with a first reference plane and a second reference plane parallel to each other. In the step S400, the infrared thermal images on the first reference plane and the second reference plane are respectively captured and stored.

[0010] Preferably, the thermal ablation experimental object is bovine liver, porcine liver or gel.

[0011] According to the three-dimensional thermal field modeling method of the thermal ablation probe based on infrared thermal images of the present invention, before performing the thermal ablation procedure, it is possible to conveniently master the thermal field temperature distribution of the thermal ablation probe at different powers in advance, thereby providing an important reference basis for effectively controlling the size of the ablation area and further improving the success rate of the operation. Description of the Drawings

[0012] Figure 1 is a flowchart of the three-dimensional thermal field modeling method of the thermal ablation probe based on infrared thermal images provided by the embodiments of the present invention. Detailed Embodiments

[0013] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings so that those of ordinary skill in the art to which the present invention pertains can easily understand the present invention.

[0014] Only the parts necessary for understanding the technical content of the present invention will be described herein, and the description of the remaining parts will be omitted to avoid confusing the gist of the present invention. Attention should be paid to this. Moreover, in the process, for the sake of clarity and convenience of description, the thickness of the lines or the size of the components shown in the drawings may be exaggerated.

[0015] In this document, the terms used are for describing embodiments and are not intended to limit and / or define the present invention. When stating that a certain component is "connected", "combined", or "joined" to another component, this not only includes a direct connection relationship, but may also include an indirect connection relationship with other components existing in between. Also, terms such as "include", "comprise", or "have" mean that the features, numbers, steps, operations, components, parts, or combinations thereof described in the specification exist, and do not exclude the existence or additional possibility of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. Additionally, terms such as "first", "second", etc. that may be involved in this document are only used for the purpose of distinguishing a certain component from other components, and without special mention, do not limit the order or importance level, etc. between the components. Therefore, in this document, the first component in a certain embodiment may be called the second component in another embodiment, and similarly, the second component in a certain embodiment may be called the first component in another embodiment.

[0016] Figure 1 It is a flowchart of a three-dimensional thermal field modeling method for a thermal ablation probe based on an infrared thermal image provided according to an embodiment of the present invention.

[0017] Refer to Figure 1 , the three-dimensional thermal field modeling method for a thermal ablation probe based on an infrared thermal image according to an embodiment of the present invention is as follows.

[0018] In step S100, a thermal ablation specimen is cut into blocks having at least one plane. Here, the thermal ablation specimen is a human organ simulator, which can be bovine liver, porcine liver, or gel, etc., as long as it is similar to the physiological parameters of human tissues, it can be used.

[0019] In step S200, with the plane as the reference plane, a thermal ablation probe is inserted from the non-reference side of the thermal ablation specimen into the interior of the thermal ablation specimen, such that the tip of the thermal ablation probe is located at a detection point at a predetermined dimension from the reference plane.

[0020] To avoid damaging the reference plane for subsequent infrared thermal image capture, the thermal ablation probe can be inserted into the interior of the thermal ablation specimen from other parts outside the reference plane of the thermal ablation specimen. Preferably, the thermal ablation probe can be inserted from the side of the thermal ablation specimen, and when inserting, the thermal ablation probe is kept parallel to the reference plane. In this way, it is convenient to calculate the distance between the tip of the thermal ablation probe and the reference plane, and thus convenient to determine whether the tip reaches the desired detection point. When observing the reference plane in the direction perpendicular to the reference plane, the tip is preferably located approximately at the central part of the reference plane.

[0021] In step S300, power is supplied to the thermal ablation probe so that the tip of the thermal ablation probe heats up at a predetermined power. Herein, a reasonable value can be selected for the predetermined power as needed.

[0022] In step S400, after waiting for a predetermined time, an infrared thermal image of the reference plane is captured by an infrared thermal imager and stored. Herein, the selection of the predetermined time is based on the stability of the infrared thermal image on the reference plane, and there is no special limitation. It can be selected as 10 seconds, 20 seconds, 30 seconds or a longer time according to the actual situation. Thus, the operation of collecting and storing the infrared thermal image of one thermal ablation specimen is completed.

[0023] In step S500, the above steps S100 to S400 are sequentially repeated for a plurality of other thermal ablation specimens. Herein, the distance from the detection point of each thermal ablation specimen to the reference plane is different from each other.

[0024] For the convenience of operation, the distance from the detection point of the current thermal ablation specimen to the reference plane can be made greater than the distance from the detection point of the previous thermal ablation specimen to the reference plane. That is, the operation is carried out in the order from near to far of the distance from the detection point of the thermal ablation specimen to the reference plane. Further, the difference between the distance from the detection point of the current thermal ablation specimen to the reference plane and the distance from the detection point of the previous thermal ablation specimen to the reference plane can be a preset value. The preset value can be a constant or a value that satisfies a certain formula.

[0025] In step S600, all the stored infrared thermal images are superimposed and processed by a computer simulation program, thereby establishing a three-dimensional thermal field model of the tip of the thermal ablation probe at the above-mentioned predetermined power.

[0026] When the distance from the detection point of the thermal ablation specimen to the reference plane is operated in the order from near to far, when the infrared thermal imager cannot capture the infrared thermal image caused by the heating of the tip of the thermal ablation probe on the reference plane of the thermal ablation specimen, all the stored infrared thermal images are superimposed and processed by a computer simulation program, thereby establishing a three-dimensional thermal field model of the tip of the thermal ablation probe at the above-mentioned predetermined power.

[0027] In the present invention, when superimposing and processing a plurality of infrared thermal images, an existing computer simulation program can be used for the operation.

[0028] In the process of performing the foregoing steps S100 to S600, once the predetermined power of the thermal ablation probe is determined, the predetermined power for each thermal ablation specimen will remain consistent, so that a three-dimensional thermal field model of the thermal ablation probe at this predetermined power can be finally obtained. If a three-dimensional thermal field model of the thermal ablation probe at another predetermined power is desired, then at this another predetermined power, the operations are performed on another group of thermal ablation specimens according to the foregoing steps S100 to S600.

[0029] In addition, in the step S100, the thermal ablation specimen can be cut into a block having a first reference plane and a second reference plane parallel to each other, and in the step S400, infrared thermal images on the first reference plane and the second reference plane can be respectively taken and stored. In this way, the modeling efficiency of the three-dimensional thermal field of the thermal ablation probe can be improved.

[0030] The scope of the claims of the present invention is not limited to the above specific embodiments. Various other embodiments that can be modified or changed by those of ordinary skill in the art should also be included within the scope of the claims of the present invention without departing from the gist of the technical idea of the present invention described in the claims.

Claims

1. A three-dimensional thermal field modeling method for a thermal ablation probe based on an infrared thermal image, characterized in that It includes the following steps: Step S100: Cut a thermal ablation specimen into a block with at least one plane; Step S200: With the plane as the reference plane, insert a thermal ablation probe into the interior of the thermal ablation specimen from the side of the thermal ablation specimen in a manner parallel to the reference plane, so that the tip of the thermal ablation probe is located at a detection point at a predetermined distance from the reference plane; Step S300: Connect power to the thermal ablation probe so that the tip heats up at a predetermined power; Step S400: After waiting for a predetermined time, use an infrared thermal imager to capture and store the infrared thermal image of the reference plane; Step S500: Repeat steps S100 to S400 for multiple other thermal ablation specimens in sequence, where the distance from the detection point of the current thermal ablation specimen to the reference plane is greater than the distance from the detection point of the previous thermal ablation specimen to the reference plane; And Step S600: When the infrared thermal imager cannot capture the infrared thermal image caused by the tip heating on the reference plane of the thermal ablation specimen, perform superposition processing on all the stored infrared thermal images through a computer simulation program, so as to establish a three-dimensional thermal field model of the tip at the predetermined power.

2. The three-dimensional thermal field modeling method of the thermal ablation probe based on the infrared thermal image according to claim 1, characterized in that, The difference between the distance from the detection point of the current thermal ablation specimen to the reference plane and the distance from the detection point of the previous thermal ablation specimen to the reference plane is a preset value.

3. The method for three-dimensional thermal field modeling of a thermal ablation probe based on infrared thermal images according to claim 1, wherein In step S100, cut the thermal ablation specimen into a block with a first reference plane and a second reference plane that are parallel to each other, In step S400, capture and store the infrared thermal images of the first reference plane and the second reference plane respectively.

4. The three-dimensional thermal field modeling method of the thermal ablation probe based on infrared thermal images according to claim 1, characterized in that, The thermal ablation specimen is bovine liver, porcine liver or gel.

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