阅读说明：本技术 一种快速的3d打印穿刺手术导板方法 (rapid 3D printing puncture operation guide plate method ) 是由 李光旭 连小丽 于 2019-08-08 设计创作，主要内容包括：本发明公开了一种快速的3D打印穿刺手术导板方法,包括利用医学图像获取病变在体内的具体位置以及患者体表的三维图像；规划穿刺针在体表的进针位置、方向以、进针长度及手术覆盖范围；计算进针导向筒位置间的最短测地线形成导板主体；安装导向筒部件和固定板形成三维打印模型；规划3D打印路径；本发明通过算法优化手术导板结构,仅需打印出导向孔及其相互间的连接线(测地线)即可形成穿刺手术导板架构,打印面积大大缩减,并按照测地线优化打印路径进而实现了打印效率的提高。(The invention discloses a rapid 3D printing puncture surgery guide plate method which comprises the steps of obtaining the specific position of a lesion in a body and a three-dimensional image of the body surface of a patient by using a medical image; planning the needle inserting position, the needle inserting direction, the needle inserting length and the operation coverage range of the puncture needle on the body surface; calculating the shortest geodesic line between the positions of the needle insertion guide cylinders to form a guide plate main body; installing a guide cylinder part and a fixing plate to form a three-dimensional printing model; planning a 3D printing path; according to the invention, the operation guide plate structure is optimized through an algorithm, a puncture operation guide plate framework can be formed only by printing the guide holes and the connecting lines (grounding wires) between the guide holes, the printing area is greatly reduced, and the printing path is optimized according to the grounding wires, so that the printing efficiency is improved.)

1. a rapid 3D printing puncture surgery guide plate method is characterized by comprising the following steps:

The method comprises the following steps: acquiring a specific position of a lesion in a body and a three-dimensional image of the body surface of a patient;

Step two: planning the needle inserting position, the needle inserting direction and the needle inserting length of the puncture needle on the body surface;

Step three: forming a three-dimensional image of the body surface of the patient into a body surface net, and limiting a covering area of the operation guide plate;

Step four: calculating the shortest geodesic line between needle insertion positions by using a 'discrete surface geodesic line algorithm';

step five: extracting the triangular grid unit touched by the shortest geodesic line and the triangular grid unit touched by the boundary of the puncture needle, and widening and thickening the triangular grid units to form a part;

Step six: guiding the needle inserting position planned in the step two into a guide cylinder component according to the needle inserting direction;

Step seven: introducing a fixing plate at a proper position of the boundary of the puncture needle;

Step eight: forming a complete puncture surgical guide plate;

step nine: and setting the printing path to be in the geodesic direction, and performing 3D printing.

2. the method for rapid 3D printing of a surgical guide plate according to claim 1, wherein: the first step is specifically as follows: the CT/MRI equipment is used for scanning and shooting a patient to obtain a CT/MRI medical image, and then the specific position of a lesion in the body of the patient and a three-dimensional image of the body surface of the patient are found out according to the CT/MRI medical image.

3. The method for rapid 3D printing of a surgical guide plate according to claim 2, wherein: in the first step, CT/MRI equipment is used for scanning and shooting a patient to obtain a plurality of groups of CT/MRI medical images, and the obtained plurality of groups of CT/MRI medical images are screened to screen a group of CT/MRI medical images with complete and standard information for obtaining a specific position of a lesion in a body and a three-dimensional image of the body surface of the patient.

4. the method for rapid 3D printing of a surgical guide plate according to claim 1, wherein: the specific process in the step two is as follows: the target area is sketched out by utilizing puncture design software, and the needle inserting position, the needle inserting direction and the needle inserting length of a puncture needle in the target area on the body surface are determined by a two-point positioning method.

5. The method for rapid 3D printing of a surgical guide plate according to claim 4, wherein: and in the second step, when the needle inserting position, the needle inserting direction and the needle inserting length of the puncture needle on the body surface are planned, organs, blood vessels, nerves and bones in the target area need to be avoided.

6. The method for rapid 3D printing of a surgical guide plate according to claim 4, wherein: and when the target area is sketched out by utilizing puncture design software in the second step, the medical diagnosis basis and the specific position of the lesion in the body and the three-dimensional image of the body surface of the patient obtained in the first step are required to be based.

7. the method for rapid 3D printing of a surgical guide plate according to claim 1, wherein: and in the fifth step, when widening thickening treatment is carried out, the widening thickening amount is 3-5 mm.

8. the method for rapid 3D printing of a surgical guide plate according to claim 1, wherein: and the printing path in the step nine is planned along the connecting line (geodesic line) between the guide cylinders.

Technical Field

the invention relates to the technical field of 3D printing path planning, in particular to a rapid 3D printing puncture operation guide plate method.

Background

in the puncture operation, in order to shorten the operation time, improve the operation precision and reduce the wound surface and the operation risk of a patient, a doctor plans a puncture path before the operation, a 3D printing technology is utilized to manufacture a needle insertion guide plate to limit the puncture position and the puncture direction, the model is attached to the body surface of the patient during the operation, and the puncture operation is carried out on the patient according to the guide hole;

The existing operation guide plate needs to print an area of a three-dimensional body surface as shown in figure 1, the printing time is long, and partial manufacturers manually reduce the printing area by adopting a method of hollowing out partial layout in the design process of the guide plate, but the printing effect is influenced and the requirement of a puncture operation cannot be better met.

disclosure of Invention

aiming at the problems, the invention provides a method for quickly printing a puncture surgical guide plate by 3D, the invention optimizes the structure of the surgical guide plate by an algorithm, a puncture surgical guide plate framework can be formed only by printing guide holes and connecting lines (grounding wires) among the guide holes, the printing area is greatly reduced, and the printing path is optimized according to the grounding wires, so that the printing efficiency is improved.

the invention provides a rapid 3D printing puncture surgery guide plate method, which comprises the following steps:

the method comprises the following steps: acquiring a specific position of a lesion in a body and a three-dimensional image of the body surface of a patient;

Step two: planning the needle inserting position, the needle inserting direction and the needle inserting length of the puncture needle on the body surface;

Step three: forming a three-dimensional image of the body surface of the patient into a body surface net, and limiting a covering area of the operation guide plate;

Step four: calculating the shortest geodesic line between needle insertion positions by using a 'discrete surface geodesic line algorithm';

Step five: extracting the triangular grid unit touched by the shortest geodesic line and the triangular grid unit touched by the boundary of the puncture needle, and widening and thickening the triangular grid units to form a part;

step six: guiding the needle inserting position planned in the step two into a guide cylinder component according to the needle inserting direction;

Step seven: introducing a fixing plate at a proper position of the boundary of the puncture needle;

step eight: forming a complete puncture surgical guide plate;

step nine: and setting the printing path to be in the geodesic direction, and performing 3D printing.

The further improvement lies in that: the first step is specifically as follows: the CT/MRI equipment is used for scanning and shooting a patient to obtain a CT/MRI medical image, and then the specific position of a lesion in the body of the patient and a three-dimensional image of the body surface of the patient are found out according to the CT/MRI medical image.

the further improvement lies in that: in the first step, CT/MRI equipment is used for scanning and shooting a patient to obtain a plurality of groups of CT/MRI medical images, and the obtained plurality of groups of CT/MRI medical images are screened to screen a group of CT/MRI medical images with complete and standard information for obtaining a specific position of a lesion in a body and a three-dimensional image of the body surface of the patient.

The further improvement lies in that: the specific process in the step two is as follows: the target area is sketched out by utilizing puncture design software, and the needle inserting position, the needle inserting direction and the needle inserting length of a puncture needle in the target area on the body surface are determined by a two-point positioning method.

the further improvement lies in that: and in the second step, when the needle inserting position, the needle inserting direction and the needle inserting length of the puncture needle on the body surface are planned, organs, blood vessels, nerves and bones in the target area need to be avoided.

The further improvement lies in that: and when the target area is sketched out by utilizing puncture design software in the second step, the medical diagnosis basis and the specific position of the lesion in the body and the three-dimensional image of the body surface of the patient obtained in the first step are required to be based.

The further improvement lies in that: and in the fifth step, when widening thickening treatment is carried out, the widening thickening amount is 3-5 mm.

The further improvement lies in that: and the printing path in the step nine is planned along the connecting line (geodesic line) between the guide cylinders.

The invention has the beneficial effects that: according to the invention, the printing path is optimized through an algorithm, and a puncture operation guide plate framework can be formed only by printing the guide holes and the connecting lines (geodesic lines) between the guide holes, so that the printing area is greatly reduced; and set for printer printing route along geodesic line direction, and then solved preceding puncture operation baffle and printed the time long, the problem that the consumptive material is many, realized the improvement of operation baffle printing efficiency.

Drawings

Fig. 1 is a schematic view of a surgical guide plate assisted puncture operation generated by using a 3D printing technology in the background art of the present invention.

FIG. 2 is a schematic view of a guide pattern structure according to the present invention.

Detailed Description

in order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.