A dual-layer target site positioning laser-guided puncture system and a method of using the same

Abstract

The application provides a double-layer target point positioning laser guiding puncture system and a use method thereof, and particularly relates to the technical field of medical intervention puncture auxiliary positioning, wherein the double-layer target point positioning laser guiding puncture system comprises a CT machine, the CT machine is provided with a movable machine tool for the patient to lie on, and a plurality of rows of first laser instruments are installed on the inner side of the CT machine, and the first laser instruments are used for forming a layer laser surface corresponding to a selected CT tomographic layer; a positioning assembly is used for being placed on a target region of the patient's body surface, the CT machine is used for collecting CT image data containing a target lesion and the positioning assembly, and determining a target point center of the target lesion, and the positioning assembly comprises a mounting frame, a first positioning member and a second positioning member; the application has the beneficial effects that a puncture path is visualized and physically constrained, the operation threshold is reduced, one-time scanning, accurate puncture route planning and direct needle insertion are realized, the number of intraoperative repeated puncture adjustment and CT review scanning is greatly reduced, the radiation dose of the patient is effectively reduced, and the occurrence risk of pneumothorax and bleeding is reduced.

Description

Technical Field

[0001] This invention relates to the field of medical interventional puncture-assisted positioning technology, and more specifically, to a dual-layer target positioning laser-guided puncture system and its method of use. Background Technology

[0002] Currently, percutaneous biopsy of masses in organs such as the lung, liver, and pancreas has become a key diagnostic technique for accurately differentiating between benign and malignant tumors. Traditional biopsy procedures rely heavily on CT imaging as the primary guide: during clinical practice, the physician must first precisely fix traditional single-layer positioning markers on the patient's body surface, for example... Figure 1 The metal mesh in the procedure includes two positioning strips 221 and several first metal wires 222 fixed between the two positioning strips 221. The two positioning strips 221 are adhered to the patient's body, and the first metal wires 222 are parallel to the long axis of the body. Using CT scans, the location of the lesion is precisely located, and the tumor site is marked on the corresponding first metal wires 222. Subsequently, based on the image data from the CT workstation, the distance between the puncture point and the lesion is accurately calculated, and the needle insertion angle is determined. Finally, the operator returns to the patient's bedside and, relying entirely on their spatial reasoning ability and rich clinical experience, autonomously adjusts the angle and orientation of the puncture needle to complete the needle insertion operation without real-time visual guidance. This method has the following shortcomings:

[0003] 1. The spatial mapping between the body surface and the image is difficult and heavily relies on the doctor's personal experience: Traditional CT images provide two-dimensional tomographic images, while body surface puncture is a three-dimensional spatial operation. Doctors need to convert the two-dimensional angles on the screen into three-dimensional spatial actions in their minds, which is very easy to produce visual and experience errors.

[0004] 2. Lack of real-time physical space constraints during the procedure: During the needle insertion process, the puncture needle is in a "suspended" state outside the body. Due to the lack of real-time, visual physical trajectory reference, even slight tremors of the operator's hand or minor deformation of the patient's chest wall can cause the needle tip to deviate from the intended trajectory.

[0005] 3. Repeated scanning and corrections increase complications: Due to the limited success rate of needle insertion on the first attempt, the patient often needs to be brought into the CT scan multiple times during the procedure for verification and "correction" (removing part of the needle, readjusting the angle, and then inserting the needle again). This not only increases the patient's radiation exposure dose but also significantly increases the incidence of serious complications such as pneumothorax and pulmonary hemorrhage. Summary of the Invention

[0006] To address the problems existing in the prior art, a dual-layer target positioning laser-guided puncture system and its usage method are provided. The puncture path is visualized and physically constrained, which lowers the operation threshold and enables precise puncture route planning and direct needle insertion in a single scan. The system can convert the image planning results into visible physical guide lines, which greatly reduces the number of repeated puncture adjustments and CT scans during the operation, reduces path calibration errors, effectively reduces the patient's radiation dose, and reduces the risk of pneumothorax and bleeding.

[0007] The purpose and effect of the present invention are achieved by the following specific technical means: On the one hand, the present invention provides a dual-layer target positioning laser-guided puncture system, including a CT machine, wherein the CT machine has a movable machine bed for the examinee to lie down, and several rows of first lasers are installed inside the CT machine, the first lasers being used to form a layer laser surface corresponding to the selected CT tomographic plane.

[0008] A positioning component is used to place on a target area on the patient's body surface. The CT scanner is used to acquire CT image data containing the target lesion and the positioning component, and to determine the target center of the target lesion. The positioning component includes a mounting frame, a first positioning element, and a second positioning element. The mounting frame is a flexible mounting frame, and at least the top and bottom ends and both sides of the mounting frame are open. The second positioning element and the first positioning element are parallel to each other and are detachably connected to the top and bottom ends of the mounting frame. The first positioning element and the second positioning element have a first imaging line and a second imaging line that can be identified in the CT image, respectively. The first positioning element is attached to the patient's body with a double-sided adhesive. A row of first lasers emits to form a layered laser surface. The layered laser surface forms laser projection lines on the first positioning element and the second positioning element, respectively. The laser projection lines intersect with the second positioning element and the first positioning element.

[0009] The computer is connected to the CT scanner and has a medical imaging system for receiving CT image data, selecting the layer of the larger mass, avoiding ribs and blood vessels, finding the point on the first positioning device that is closest to the center of the mass, determining the first positioning point that can be used for puncture, connecting the first positioning point and the mass with the pen tool in the medical imaging system, calculating the length of the connection line through the medical imaging system, extending the connection line in the opposite direction to intersect with the second positioning device to form a second positioning point;

[0010] A laser assembly, located next to the CT scanner, is used to emit a laser beam. The laser beam emitted by the laser assembly passes through the points on the second positioning element and the first positioning element to determine the needle insertion angle and puncture site.

[0011] The first positioning component includes two positioning strips and several first metal wires arranged in parallel. The several first metal wires are fixed between the two positioning strips. The two positioning strips are detachably connected to the bottom sides of the mounting frame. The first metal wires form identifiable first imaging lines in CT images. The first positioning point is the intersection point of the laser projection line on the first positioning component and one of the first imaging lines.

[0012] The second positioning element includes two transparent patches and several parallel second metal wires. The several second metal wires are bonded between the two transparent patches. The second metal wires are parallel to the first metal wires. The lower transparent patch is detachably connected to the top of the mounting frame. The second metal wires form a recognizable second imaging line in the CT image. The second positioning point is the intersection of the laser projection line on the second positioning element and one of the second imaging lines.

[0013] The distance L between the first positioning element and the second positioning element is in the range of 3cm≤L≤8cm.

[0014] The laser assembly includes a support base, a rotating disk, a lifting rod, a rotating head, a mounting frame, and a second laser. The rotating disk is rotatably connected to the support base, the lifting rod is mounted on the rotating disk, the rotating head is mounted on the upper end of the lifting rod, the mounting frame is mounted on the rotating head, and the second laser is detachably connected to the mounting frame.

[0015] The upper end of the lifting rod is provided with a locking structure, the inner end of which abuts against the rotating head to limit the rotation of the head.

[0016] The locking structure includes a threaded hole at the upper end of the lifting rod and a threaded handle, wherein the threaded end of the handle is screwed into the threaded hole.

[0017] The lifting pole is an electric lifting pole.

[0018] Both the first and second metal lines are printed with scales, and the positioning strip and the side of the transparent patch are respectively printed with numerical numbers corresponding to the arrangement of the first and second metal lines.

[0019] On the other hand, the present invention also provides a method for using a dual-layer target positioning laser-guided puncture system, comprising the following steps:

[0020] S1. Place the positioning component in the target area on the subject's body surface: The subject lies on the mobile machine tool, and the first positioning component is attached to or close to the subject's body surface, so that the first metal wire is aligned with the long axis of the human body.

[0021] S2. Determine the location of the lesion area and the center of the mass: Obtain CT image data containing the target lesion and the positioning components through a CT scanner, determine the location of the lesion area, select the CT tomographic plane with the larger mass as the puncture plane, and use the first laser instrument to form a laser plane corresponding to the selected CT tomographic plane. The laser plane forms laser projection lines on the first positioning component and the second positioning component respectively.

[0022] S3. Calculate the distance from the center of the mass to the first positioning element: In the CT image presented by the medical imaging system, avoiding ribs and major blood vessels, find the point on the first positioning element that is closest to the center of the mass, and determine the first positioning point that can be used for puncture. The first metal wire forms a recognizable first imaging line in the CT image, and the second metal wire forms a recognizable second imaging line in the CT image. The first positioning point is the intersection of the laser projection line on the first positioning element and one of the first imaging lines. Draw the line from the first positioning point to the center of the mass on the computer and calculate the length of the line. Extend the line in the opposite direction to intersect with one of the second imaging lines to form the second position.

[0023] S4. Marking the positions on the second and first positioning elements: The laser surface in S2 intersects with the second and first positioning elements, forming laser lines that intersect with the first and second metal lines on the second and first positioning elements. The first and second positioning points are marked according to the laser projection lines on the second and first positioning elements, the numerical numbers of the first and second developing lines, the numerical numbers on the first and second metal lines, and the scales on the first and second metal lines.

[0024] S5. Adjust the laser assembly to determine the puncture path: Move the patient out of the CT machine by moving the machine tool, move the laser assembly next to the moving machine tool, adjust the lifting rod to adjust the height of the second laser, turn on the second laser, loosen the locking structure, adjust the angle of the second laser by rotating the head, when the laser line emitted by the second laser passes through the two marked points in S4, determine the puncture path, and tighten the locking structure.

[0025] S6, Laser-guided puncture: Remove the positioning component from the patient, align the puncture needle with the laser line in S5, and insert the needle into the patient's body along the direction of the laser line. The needle depth is equal to the length of the line connecting the first positioning point in S3 to the center of the mass, thus achieving precise puncture.

[0026] The beneficial effects of this invention are:

[0027] 1. Visualize physical constraints and lower the operational threshold: Utilize the geometric principle that "two points determine a straight line" to transform complex imaging perspectives into intuitive, visible laser guide lines, enabling doctors to move from "blind operation" to "track-like" needle insertion with a basis, significantly reducing reliance on the surgeon's experience.

[0028] 2. Surface-following mechanism to counteract respiratory deformation: The positioning component can be attached to the skin and can move as a whole with the chest wall rise and fall caused by the patient's breathing, maintaining the relative geometric stability of the two points and the internal target path.

[0029] 3. Streamlined operation process and reduced complications: It realizes one scan, precise puncture route planning and direct needle insertion, which greatly reduces the number of repeated puncture adjustments and CT scans during the operation, effectively reducing the patient's radiation dose and reducing the risk of pneumothorax and bleeding.

[0030] 4. Simple structure, low cost and easy to popularize: Compared with electromagnetic navigation or surgical robots that cost hundreds of thousands or millions of dollars, this solution is based entirely on physical structure improvement and micro laser generator, with extremely low cost, making it easy to promote and apply in primary hospitals. Attached Figure Description

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] Figure 1 This is a schematic diagram of a metal mesh structure in the background art of this invention;

[0033] Figure 2 This is a schematic diagram of the overall structure of the present invention;

[0034] Figure 3 This is a three-dimensional structural diagram of the CT scanner of the present invention;

[0035] Figure 4 This is a schematic diagram of the main view structure of the CT scanner of the present invention;

[0036] Figure 5 This is a three-dimensional structural diagram of the positioning component of the present invention;

[0037] Figure 6 This is an exploded view of the positioning component of the present invention;

[0038] Figure 7 This is a three-dimensional structural diagram of the laser component of the present invention;

[0039] Figure 8 In this invention Figure 7 A partial enlarged structural diagram of A;

[0040] Figure 9 This is a CT image of a lung mass puncture path determined by a positioning component according to the present invention.

[0041] The following components are marked in the diagram: CT machine 1, mobile machine tool 11, first laser instrument 12, positioning component 2, mounting frame 21, first positioning element 22, positioning strip 221, first metal wire 222, second positioning element 23, patch 231, second metal wire 232, laser component 3, support base 31, rotating disk 32, lifting rod 33, rotating head 34, mounting bracket 35, second laser instrument 36, locking structure 37, threaded hole 371, handle 372, computer 4. Detailed Implementation

[0042] To better understand the above-mentioned objects, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The following embodiments are merely examples for implementing the present invention. It must be noted that the disclosed embodiments do not limit the scope of the present invention. On the contrary, any modifications and refinements made without departing from the scope of the present invention are within the scope of patent protection of the present invention.

[0043] A dual-layer target-positioning laser-guided puncture system, such as Figure 2-5 As shown, it includes a CT machine 1, a positioning component 2, a laser component 3 and a computer 4. The CT machine 1 has a movable machine bed 11 for the patient to lie down on, and several rows of first lasers 12 are installed inside the CT machine 1. The first lasers 12 are used to form the laser plane corresponding to the selected CT tomographic plane.

[0044] The positioning component 2 is used to place on the target area of ​​the patient's body surface. The CT scanner 1 is used to acquire CT image data containing the target lesion and the positioning component 2, and to determine the target center of the lesion. The positioning component 2 includes a mounting frame 21, a first positioning element 22, and a second positioning element 23. The mounting frame 21 is a flexible mounting frame. For example, the mounting frame 21 can be made of medical silicone, carbon fiber, etc., and it only needs to be deformable and have a certain supporting force. The mounting frame 21 is open at least at the top and bottom ends and on both sides. Preferably, in order to facilitate marking on the first positioning element 22 and the second positioning element 23 later, the mounting frame 21 can be... 1. Openings are provided on all six sides, making it easier for the mounting frame 21 to deform; the second positioning member 23 and the first positioning member 22 are parallel to each other and detachably connected to the upper and lower ends of the mounting frame 21 respectively. The first positioning member 22 and the second positioning member 23 have multiple first imaging lines and second imaging lines that can be identified in CT images. The first positioning member 22 is attached to the patient's body with a double-sided adhesive. A row of first lasers 12 emits to form a layered laser surface. The layered laser surface forms laser projection lines on the first positioning member 22 and the second positioning member 23 respectively. The laser projection lines intersect with the second positioning member 23 and the first positioning member 22.

[0045] Computer 4 is connected to CT machine 1 via signal, and computer 4 has a medical imaging system for receiving CT image data, selecting the layer with a larger mass, avoiding ribs and blood vessels, finding the point on the first positioning element 22 that is closest to the center of the mass, determining the first positioning point that can be used for puncture, and connecting the first positioning point and the mass with the pen tool in the medical imaging system, calculating the length of the connection through the medical imaging system, extending the connection in the opposite direction to intersect with the second positioning element 23 and form a second site;

[0046] The laser assembly 3 is located next to the CT machine 1 and is used to emit laser. The laser line emitted by the laser assembly 3 passes through the second position on the second positioning member 23 and the first position on the first positioning member 22 to determine the needle insertion angle and puncture site.

[0047] For example, when a patient undergoes a lung puncture, the patient first lies on the mobile machine 11, the doctor assists the patient in positioning, double-sided tape is attached to the surfaces of the two first positioning parts 22, and then the first positioning parts 22 are attached to the patient's chest wall, so that the whole body can move with the rise and fall of the chest wall caused by the patient's breathing.

[0048] The patient is moved into the CT machine 1 by the moving machine tool 11. The CT machine 1 acquires CT image data containing the target lesion and the positioning component 2, determines the location of the lesion area, selects the CT tomographic plane with a larger mass as the puncture plane, and uses the first laser instrument 12 to form a plane laser surface corresponding to the selected CT tomographic plane. The plane laser surface forms laser projection lines on the first positioning component 22 and the second positioning component 23 respectively.

[0049] The CT scanner 1 scans the patient and generates CT image data, which is then transmitted to the computer 4. The medical imaging system in the computer 4 uses existing technology to receive the CT image data, select the layer with a larger mass, avoid ribs and blood vessels, find the point on the first positioning piece 22 that is closest to the center of the mass, determine the first positioning point that can be used for puncture, and connect the first positioning point and the mass with the pen tool in the medical imaging system. The length of the connection is calculated by the medical imaging system, and the connection is extended in the opposite direction to intersect with the second positioning piece 23 to form the second position.

[0050] Activate laser component 3, which will emit a laser line. Pass the laser line through the two points mentioned above in sequence and irradiate the chest wall to determine the needle insertion angle and puncture point. Use a bracket or other fixing device to position the laser component 3 and keep it in that position.

[0051] Finally, the doctor can remove the positioning component 2 from the patient, move the puncture needle to align with the laser line, and determine the puncture depth by the previously calculated length of the connecting line.

[0052] Of course, this device can also be used for puncture biopsy of masses in organs such as the liver and pancreas.

[0053] The use of this device offers the following advantages:

[0054] 1. Visualize physical constraints and lower the operational threshold: Utilize the geometric principle that "two points determine a straight line" to transform complex imaging perspectives into intuitive, visible laser guide lines, enabling doctors to move from "blind operation" to "track-like" needle insertion with a basis, significantly reducing reliance on the surgeon's experience.

[0055] 2. Surface-following mechanism to counteract respiratory deformation: The positioning component 2 can be attached to the skin and can move as a whole with the chest wall rise and fall caused by the patient's breathing, maintaining the relative geometric stability of the two points and the internal target path.

[0056] 3. Streamlined operation process and reduced complications: It realizes one scan, precise puncture route planning and direct needle insertion, which greatly reduces the number of repeated puncture adjustments and CT scans during the operation, effectively reducing the patient's radiation dose and reducing the risk of pneumothorax and bleeding.

[0057] 4. Simple structure, low cost and easy to popularize: Compared with electromagnetic navigation or surgical robots that cost hundreds of thousands or millions of dollars, this solution is based entirely on physical structure improvement and micro laser generator, with extremely low cost, making it easy to promote and apply in primary hospitals.

[0058] Specifically, such as Figure 5-6 As shown, the first positioning component 22 includes two positioning strips 221 and several first metal wires 222 arranged in parallel. The several first metal wires 222 are fixed between the two positioning strips 221. The two positioning strips 221 can be detachably connected, such as by double-sided adhesive, snap-fit, or embedding, to the bottom sides of the mounting frame 21. The first metal wires 222 form identifiable first imaging lines in CT images. The first positioning point is the intersection of the laser projection line on the first positioning component 22 and one of the first imaging lines. The positioning strips 221 can be cardboard, plastic, etc. The first metal wires 222 are preferably iron wires, which are relatively inexpensive. The several first metal wires 222 are aligned with the long axis of the human body to accurately locate the mass position later.

[0059] Specifically, such as Figure 5-6As shown, the second positioning element 23 includes two transparent patches 231 and several parallel second metal wires 232. The several second metal wires 232 are bonded between the two transparent patches 231. The second metal wires 232 are parallel to the first metal wires 222. The lower transparent patch 231 is detachably connected to the top of the mounting frame 21. The transparent patch 231 can also be replaced with a transparent film that can transmit light and wrap the second metal wires 232. The second metal wires 232 are preferably iron wires. The second metal wires 232 form a recognizable second imaging line in the CT image. The second positioning point is the intersection point of the laser projection line on the second positioning element 23 and one of the second imaging lines.

[0060] Furthermore, the distance L between the first positioning element 22 and the second positioning element 23 is in the range of 3cm≤L≤8cm. Specifically, the distance L between the first positioning element 22 and the second positioning element 23 can be 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, etc., so that doctors can easily mark the first positioning element 22 and the second positioning element 23.

[0061] Furthermore, both the first metal line 222 and the second metal line 232 are printed with scales, and the positioning strip 221 and the transparent patch 231 are respectively printed with numerical numbers corresponding to the arrangement of the first metal line 222 and the second metal line 232. Through the above design, it is convenient to record and know the location of the positioning point.

[0062] Specifically, such as Figure 7 As shown, the laser assembly 3 includes a support base 31, a rotating disk 32, a lifting rod 33, a rotating head 34, a mounting frame 35, and a second laser instrument 36. The rotating disk 32 is rotatably connected to the support base 31. Damping is provided between the rotating disk 32 and the support base 31 to prevent the rotating disk 32 from rotating arbitrarily on the support base 31. The lifting rod 33 is installed on the rotating disk 32. The lifting rod 33 is preferably an electric lifting rod for precise lifting and operation. The rotating head 34 is installed on the upper end of the lifting rod 33. The mounting frame 35 is installed on the rotating head 34. The second laser instrument 36 is detachably connected to the mounting frame 35 by means of bolts, snap-fit, or other means.

[0063] The upper end of the lifting rod 33 is provided with a locking structure 37, the inner end of which abuts against the rotating head 34 for limiting the rotation head 34. Specifically, the locking structure 37 includes a threaded hole 371 opened at the upper end of the lifting rod 33 and a threaded handle 372, the threaded end of the handle 372 being screwed into the threaded hole 371.

[0064] When using laser component 3, activate the second laser device 36, which emits a laser beam. Move the support base 31 next to the mobile machine tool 11 and close to the positioning component 2. Hold and rotate the electric lifting rod to drive the rotating disk 32 to rotate on the support base 31. When the second laser device 36 is facing the positioning component 2, stop rotating the electric lifting rod. Then, connect the electric lifting rod to the power supply and adjust it to a suitable height. Turn the handle 372 clockwise so that the handle 372 gradually unscrews out of the threaded hole 371 and no longer limits the rotating head 34. At this time, the doctor can rotate the second laser device 36 to drive the mounting bracket 35 and the rotating head 34 to rotate on the upper end of the lifting rod 33. When the laser beam emitted by the second laser device 36 passes through the points on the first positioning component 22 and the second positioning component 23, turn the handle 372 counterclockwise so that the handle 372 gradually screws into the threaded hole 371 until the inner end of the handle 372 abuts against the rotating head 34, limiting the rotating head 34.

[0065] A method for using a dual-layer target-positioning laser-guided puncture system, such as... Figure 2-9 As shown, it includes the following steps:

[0066] S1. Place the positioning component 2 in the target area on the subject's body surface: The subject lies on the mobile machine tool 11, and the first positioning component 22 is attached to or close to the subject's body surface, so that the first metal wire 222 is aligned with the long axis of the human body.

[0067] S2. Determine the location of the lesion area and the center of the mass: CT image data containing the target lesion and the positioning component 2 are acquired by CT machine 1 to determine the location of the lesion area. The CT tomographic plane with a larger mass is selected as the puncture plane, and the first laser instrument 12 is used to form a laser plane corresponding to the selected CT tomographic plane. The laser plane forms laser projection lines on the first positioning component 22 and the second positioning component 23 respectively.

[0068] S3. Calculate the distance from the center of the mass to the first positioning element 22: In the CT image presented by the medical imaging system, avoiding ribs and major blood vessels, find the point on the first positioning element 22 that is closest to the center of the mass, and determine the first positioning point that can be used for puncture. The first metal wire 222 forms an identifiable first imaging line in the CT image, and the second metal wire 232 forms an identifiable second imaging line in the CT image. The first positioning point is the intersection of the laser projection line on the first positioning element 22 and one of the first imaging lines. Draw the line from the first positioning point to the center of the mass on the computer 4 and calculate the length of the line. Extend the line in the opposite direction to intersect with one of the second imaging lines to form the second position.

[0069] S4. Marking the positions on the second positioning element 23 and the first positioning element 22: The laser surface in S2 intersects with the second positioning element 23 and the first positioning element 22, forming laser lines that intersect with the first metal line 222 and the second metal line 232 on the second positioning element 23 and the first positioning element 22. The first positioning point and the second positioning point are marked according to the laser projection lines on the second positioning element 23 and the first positioning element 22, the numerical numbers of the first development line and the second development line, the numerical numbers on the first metal line 222 and the second metal line 232, and the scales on the first metal line 222 and the second metal line 232.

[0070] S5. Adjust the laser assembly 3 to determine the puncture path: Move the patient out of the CT machine 1 by moving the machine tool 11, move the laser assembly 3 next to the machine tool 11, adjust the lifting rod 33 to adjust the height of the second laser instrument 36, turn on the second laser instrument 36, loosen the locking structure 37, adjust the angle of the second laser instrument 36 by rotating the head 34, and when the laser line emitted by the second laser instrument 36 passes through the two marked points in S4, determine the puncture path, and tighten the locking structure 37.

[0071] S6, Laser-guided puncture: Remove the positioning component 2 from the patient, align the puncture needle with the laser line in S5, and insert the needle into the patient's body along the direction of the laser line. The depth of the needle insertion is equal to the length of the line connecting the first positioning point in S3 to the center of the mass, thus achieving precise puncture.

[0072] In practical applications, the positioning component 2 is first positioned on the patient, followed by image acquisition. A CT scan is performed using a CT scanner 1 to obtain a complete image containing the lung lesion and the positioning component 2. Subsequently, target co-calculation (puncture path planning) is performed, such as... Figure 9 As shown, the tumor center point C is delineated on the computer, avoiding important parts of the body such as ribs and major blood vessels, and the optimal puncture line is determined. Based on this line, the surgeon extends it backward to obtain the intersection point a with the first positioning element 22 and the intersection point b with the second positioning element 23. The intersection point a is the fifth first metal line 222 from left to right, and the intersection point b is the sixth second metal line 232 from left to right. The laser emitted by the first laser device 12 on the CT machine 1, which is aimed at the center of the mass, will form a laser surface that passes through the second positioning element 23 and the first positioning element 22 and shines directly on the lesion area. If the laser surface shines on the fifth first metal line 222 at the scale of 3, then the coordinates of a are (5,3); if the laser surface shines on the sixth second metal line 232 at the scale of 4, then the coordinates of b are (6,4). The puncture line passes through the two points a (5,3) and b (6,4).

[0073] After the patient is removed from the CT scanner 1, the laser assembly 3 is adjusted and activated. The specific operation will not be described in detail. The laser beam emitted by the second laser instrument 36 is precisely and simultaneously penetrates the two points a (5,3) and b (6,4). At this time, the laser line and the planned puncture path in the body are completely coincident in space. The doctor pushes the puncture needle in the direction of complete laser line coincidence. Specifically, the needle tip of the puncture needle is first aligned with the laser point on the human skin. Then the needle tip is fixed and the needle tail angle is adjusted. When the laser point appears in the center of the needle tail, the puncture needle and the laser line are coincident. Puncture can be performed at this angle, and the biopsy tissue can be successfully removed in one go. This achieves one scan, precise puncture route planning, and direct needle insertion, which greatly reduces the number of repeated puncture adjustments and CT scans during the operation, effectively reducing the patient's radiation dose and the risk of pneumothorax and bleeding.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A dual-layer target positioning laser-guided puncture system, characterized in that, include: The CT machine (1) has a movable machine tool (11) on which the examinee can lie down, and several rows of first laser instruments (12) are installed inside the CT machine (1). The first laser instruments (12) are used to form a laser plane corresponding to the selected CT tomographic plane. The positioning component (2) is used to place on the target area of ​​the patient's body surface. The CT machine (1) is used to acquire CT image data containing the target lesion and the positioning component (2) and to determine the target center of the target lesion. The positioning component (2) includes a mounting frame (21), a first positioning element (22), and a second positioning element (23). The mounting frame (21) is a flexible mounting frame, and the mounting frame (21) is open at least at the top and bottom ends and on both sides. The second positioning element (23) and the first positioning element (22) are parallel to each other and are detachably connected to the top and bottom ends of the mounting frame (21). The first positioning element (22) is pasted on the patient's body with a double-sided adhesive. A row of first laser instruments (12) emits to form a layered laser surface. The layered laser surface forms laser projection lines on the first positioning element (22) and the second positioning element (23), respectively. The laser projection lines intersect with the second positioning element (23) and the first positioning element (22). Computer (4), the computer (4) is connected to CT machine (1) by signal, and the computer (4) has a medical imaging system for receiving CT image data, selecting the layer with a larger mass, avoiding ribs and blood vessels, finding the point on the first positioning piece (22) closest to the center of the mass, determining the first positioning point that can be used for puncture, and connecting the first positioning point and the mass with the pen tool in the medical imaging system, calculating the length of the connection through the medical imaging system, extending the connection in the opposite direction to intersect with the second positioning piece (23) and form the second position; The laser assembly (3) is located next to the CT machine (1) and is used to emit laser. The laser line emitted by the laser assembly (3) passes through the positions on the second positioning member (23) and the first positioning member (22) to determine the needle insertion angle and puncture site.

2. The dual-layer target positioning laser-guided puncture system according to claim 1, characterized in that: The first positioning element (22) includes two positioning strips (221) and several first metal wires (222) arranged in parallel. Several first metal wires (222) are fixed between the two positioning strips (221). The two positioning strips (221) are detachably connected to the bottom sides of the mounting frame (21). The first metal wires (222) form a first imaging line that can be identified in the CT image. The first positioning point is the intersection point of the laser projection line on the first positioning element (22) and one of the first imaging lines.

3. The dual-layer target positioning laser-guided puncture system according to claim 2, characterized in that: The second positioning element (23) includes two transparent patches (231) and several parallel second metal wires (232). The several second metal wires (232) are bonded between the two transparent patches (231). The second metal wires (232) are parallel to the first metal wires (222). The lower transparent patch (231) is detachably connected to the top of the mounting frame (21). The second metal wires (232) form a recognizable second imaging line in the CT image. The second positioning point is the intersection of the laser projection line on the second positioning element (23) and one of the second imaging lines.

4. The dual-layer target positioning laser-guided puncture system according to claim 1, characterized in that: The distance L between the first positioning element (22) and the second positioning element (23) is 3cm≤L≤8cm.

5. The dual-layer target positioning laser-guided puncture system according to claim 1, characterized in that: The laser assembly (3) includes a support base (31), a rotating disk (32), a lifting rod (33), a rotating head (34), a mounting frame (35), and a second laser (36). The rotating disk (32) is rotatably connected to the support base (31), the lifting rod (33) is mounted on the rotating disk (32), the rotating head (34) is mounted on the upper end of the lifting rod (33), the mounting frame (35) is mounted on the rotating head (34), and the second laser (36) is detachably connected to the mounting frame (35).

6. The dual-layer target positioning laser-guided puncture system according to claim 5, characterized in that: The upper end of the lifting rod (33) is provided with a locking structure (37), the inner end of the locking structure (37) abuts against the rotating head (34) for limiting the rotation head (34).

7. The dual-layer target positioning laser-guided puncture system according to claim 6, characterized in that: The locking structure (37) includes a threaded hole (371) at the upper end of the lifting rod (33) and a threaded handle (372), the threaded end of the handle (372) being screwed into the threaded hole (371).

8. The dual-layer target positioning laser-guided puncture system according to claim 5, characterized in that: The lifting rod (33) is an electric lifting rod.

9. The dual-layer target positioning laser-guided puncture system according to claim 3, characterized in that: The first metal line (222) and the second metal line (232) are both printed with scales, and the positioning strip (221) and the transparent patch (231) are respectively printed with numerical numbers corresponding to the arrangement of the first metal line (222) and the second metal line (232).

10. A method of using a dual-layer target positioning laser-guided puncture system, characterized in that, Includes the following steps: S1. Place the positioning component (2) on the target area of ​​the subject's body surface: The subject lies on the mobile machine tool (11), and the first positioning component (22) is attached to or close to the subject's body surface so that the first metal wire (222) is aligned with the long axis of the human body. S2. Determine the location of the lesion area and the center of the mass: Obtain CT image data containing the target lesion and the positioning component (2) through CT machine (1), determine the location of the lesion area, select the CT tomographic plane with a larger mass as the puncture plane, and use the first laser instrument (12) to form a plane laser surface corresponding to the selected CT tomographic plane. The plane laser surface forms laser projection lines on the first positioning component (22) and the second positioning component (23) respectively. S3. Calculate the distance between the center of the mass and the first positioning element (22): In the CT image presented by the medical imaging system, avoid the ribs and major blood vessels, find the point on the first positioning element (22) that is closest to the center of the mass, and determine the first positioning point that can be used for puncture. The first metal wire (222) forms an identifiable first imaging line in the CT image, and the second metal wire (232) forms an identifiable second imaging line in the CT image. The first positioning point is the intersection of the laser projection line on the first positioning element (22) and one of the first imaging lines. Draw the line from the first positioning point to the center of the mass on the computer (4) and calculate the length of the line. Extend the line in the opposite direction and it will intersect with one of the second imaging lines to form the second position. S4. Mark the positions on the second positioning element (23) and the first positioning element (22): The laser surface in S2 intersects with the second positioning element (23) and the first positioning element (22), forming laser lines that intersect with the first metal line (222) and the second metal line (232) on the second positioning element (23) and the first positioning element (22). Mark the first positioning point and the second positioning point respectively according to the laser projection lines on the second positioning element (23) and the first positioning element (22), the numerical numbers of the first development line and the second development line, the numerical numbers on the first metal line (222) and the second metal line (232), and the scale on the first metal line (222) and the second metal line (232). S5. Adjust the laser assembly (3) to determine the puncture path: Move the patient out of the CT machine (1) by moving the machine tool (11), move the laser assembly (3) next to the machine tool (11), adjust the lifting rod (33) to adjust the height of the second laser device (36), turn on the second laser device (36), loosen the locking structure (37), adjust the angle of the second laser device (36) by rotating the head (34), when the laser line emitted by the second laser device (36) passes through the two marked points in S4, determine the puncture path, and tighten the locking structure (37). S6, laser-guided puncture: Remove the positioning component (2) from the patient, align the puncture needle with the laser line in S5, and insert the needle into the patient's body along the direction of the laser line. The depth of the needle insertion is equal to the length of the line connecting the first positioning point in S3 to the center of the mass, so as to achieve precise puncture.

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