Location ruler used in operation

Abstract

The invention relates to a location ruler used in an operation. The location ruler comprises two X-ray-pervious opposite faces, the two opposite faces are fixedly connected through an X-ray-pervious connection face, the distance between the two opposite faces ranges from 5 cm to 15 cm, the two opposite faces are respectively provided with a set of marks, each set of marks include at least four mark points which are on different straight lines and are arranged based on marking of a linear camera model in an X-ray imaging device and the three-dimensional spatial point rebuilding principle, the marking points are X-ray-impervious components, any opposite face or the connection face is fixedly connected with a ruler handle, and the ruler handle is provided with a connector used for being connected with a mechanical arm of an orthopedics robot. According to the location ruler, by means of one set of marking points of each opposite face, perspective location can be achieved at any angle, system errors caused during calculation of an operation path can be eliminated and precision of the location ruler is improved.

Description

technical field [0001] The invention relates to a medical device, in particular to a surgical positioning scale used for spatial positioning calculation of orthopedic navigation surgical path. Background technique [0002] In various orthopedic navigation operations, the spatial positioning algorithm is one of the core technologies. The positioning scale is the reference benchmark for the calculation of the spatial positioning of the surgical path in the robotic surgery system, and is a key component that affects the accuracy of surgical positioning. The positioning scale is generally installed between the X-ray light source and the X-ray imaging device. The X-ray light source passes through the positioning scale to form an image, and then the marking points on the positioning scale are displayed on the image. According to the specific marks in the image formed by the X-ray The distribution of points can be used for spatial positioning calculation, and finally determine the ...

AI Technical Summary

Problems solved by technology

However, this type of positioning scale can only be seen through two orientations (usually front and side) at a predetermined position, and at least two rows of frontal X-ray rulers and at least two rows of lateral X-ray rulers have a specific scale configuration The perspective angle of the C-arm is limited during the operation, so the scope of use of the positioning ruler is greatly limited

In addition, it is required that the positioning scale cannot be moved when using the positioning scale for frontal and lateral fluoroscopy. As a result, due to the unreasonable position of the positioning scale in one of the fluoroscopy directions, it is necessary to re-perform the fluoroscopy of the other direction when the position is adjusted, which increases the X-ray radiation. injury, prolonging the operative time

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