Registration method of framed stereotactic system

A stereotaxic and frame-based technology, applied in stereotaxic surgical instruments, computer-aided planning/modeling, etc., can solve problems such as the "gold standard" status that is difficult to shake, achieve high performance and cost-effective advantages, and improve precision treatment. level, the effect of overcoming technical bias

Pending Publication Date: 2022-08-05
浙江睿创精准医疗科技有限公司
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  • Abstract
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Problems solved by technology

[0011] In the present invention, the technical prejudice that the framed stereotaxic system is only used as a cranial positioning device is overcome, and based on the geometric principle of the framed stereotaxic system and the polar coordinate characteristics of the arc bow in the system registration stage, the registration of the traditional framed stereotaxic system is solved. Problems with defects in the process, convenient and fast realization of high-precision registration, with the advantages of ultra-high performance and price ratio, help to benefit more grass-roots hospitals and patients with precision technology, and once again prove that there is a "gold standard" of frame stereotactic system "The position will remain difficult to shake

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  • Registration method of framed stereotactic system
  • Registration method of framed stereotactic system
  • Registration method of framed stereotactic system

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Embodiment 1

[0039] 2. The registration method of a framed stereotaxic system according to claim 1, wherein the data set H comprises a skin contour lattice H1 or / and a skull contour lattice H2, and the point information of other parts of the skull .

[0040] A method for registering a framed stereotaxic system, comprising the following steps:

[0041] 1) Extract head information through CT or MRI scanning to form a data set H, and extract the skin surface contour lattice H1 in H;

[0042] 2) Fix the frame stereotaxic system on the head: first fix the base ring of the frame stereotaxic system on the head; customize a target point (100, 100, 100) and install the arc bow; the target point is used as a reference for subsequent cranial surface measurement Point - that is: the center of the arc bow; install the object carrier on the arc bow. In this embodiment, the zero point of the object carrier is used as the measurement point. Therefore, the measurement radius r in this embodiment is the r...

Embodiment 2

[0050] 1) Extract head information through CT or MRI scanning to form a data set H, and extract the skull contour lattice H2 in H;

[0051] 2) Fix the frame stereotaxic system on the head: first fix the base ring of the frame stereotaxic system on the head; customize a target point (100, 100, 100) and install the arc bow; the target point is used as a reference for subsequent cranial surface measurement Point - that is: the center of the arc bow; install the object carrier on the arc bow. In this embodiment, the +5 point of the object carrier is used as the measurement point. Therefore, the measurement radius r in this embodiment is R-5, (R is the radius of the arc bow). At the same time, an angle sensor is installed on the earring of the arc-shaped bow, and the vertical plane is set as the initial angle 0 to obtain the flip angle α

[0052] 3) Fix the collector 1-ultrasonic rangefinder on the +5 point of the object carrier with the frame stereotaxic system to collect the dis...

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Abstract

The invention discloses a registration method of a framed stereotactic system, which comprises the following steps of: 1) extracting head information from a CT (Computed Tomography) or MRI (Magnetic Resonance Imaging) image sequence to form a full data set H; (2) the head is rigidly fixed to a base ring of the stereotactic system with the frame; (3) fixing a collector on an object carrier, and collecting a three-dimensional data set of the skin surface contour or the skull surface contour; and (4) registering the three-dimensional data set in the step (3) and the full data set H in the step (1) so as to obtain a coordinate conversion relation from the CT or MRI image space to the operation space and finish registration. According to the method, the defects that in the stereotactic orientation of the frame, the frame must be firstly installed and then positioned and scanned or the installation position of the frame cannot be readjusted after the positioned and scanned are overcome, the traditional operation process is optimized, the clinical convenience and the operation safety are greatly improved, and the effectiveness of the classical technology is well preserved.

Description

technical field [0001] The present invention relates to a registration method, in particular to a registration method of a stereotaxic system with a frame. Background technique [0002] Stereotactic systems are divided into three types according to different development stages: framed stereotaxic systems, frameless stereotaxic systems (commonly known as neuronavigation) and stereotaxic robots (also known as neurosurgery robots). [0003] A framed stereotaxic system generally includes a positioner, a guide, and conventional surgical instruments. The positioner includes a base ring and male earrings that can move on the base ring. The base ring is fixed to the skull with screws. The guide includes a semicircular arc bow and an object carrier (also known as a drag plate). The arc bow is coupled with the male earring fixed on the base ring by means of a female earring to connect the locator and the guide as a whole; the object carrier is installed On the arc bow, it can slide ...

Claims

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Application Information

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IPC IPC(8): A61B90/10A61B90/13A61B34/10
CPCA61B90/10A61B90/13A61B34/10A61B2090/101A61B2090/103A61B2034/101A61B2034/256
Inventor 刘子扬
Owner 浙江睿创精准医疗科技有限公司
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