Method and device for measuring lower limb force line

A technology of lower limbs and key points, applied in the field of medical imaging, can solve the problems of limited range of motion of joints, worn joints, instability, etc., to achieve the effect of improving axis extraction speed, increasing weight, and ensuring accuracy

Pending Publication Date: 2022-01-11
瓴域影诺北京科技有限公司
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Problems solved by technology

Improper placement of the prosthesis can lead to pain, limited range of motion, loosening, wear and joint instability

Method used

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  • Method and device for measuring lower limb force line
  • Method and device for measuring lower limb force line
  • Method and device for measuring lower limb force line

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[0048] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

[0049]In the description of the present invention, unless otherwise specified, "plurality" means two or more. The terms "first", "second", "third", "fourth" and the like in the specification and claims of the present invention and the above drawings are intended to distinguish the referred objects. For schemes with a time sequence flow, this terminology expression does not have to be understood as describing a specific order or sequence, and for the scheme of device structure, this terminology expression does not distinguish between importance and positional relationship, ...

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Abstract

The invention discloses a method and a device for measuring a lower limb force line. The method comprises the following steps of firstly, acquiring a lower limb X-ray image original drawing, and performing preprocessing and image enhancement to obtain a lower limb full-length film; cutting the lower limb full-length film to obtain a hip joint image, a knee joint image and an ankle joint image; respectively extracting different key points according to a corresponding key point model, and further determining a caput femoris central point, a knee joint intercondylar fovea central point and a tibial plateau central point; obtaining a thighbone mechanical axis and a tibia mechanical axis according to each center point, processing a thighbone area image and a tibia area image to obtain a thighbone anatomical axis and a tibia anatomical axis respectively, and determining a first included angle and a second included angle according to the thighbone anatomical axis and the tibia anatomical axis; and determining the lower limb force line according to the thighbone center point and the ankle joint center point, and automatically calculating the lower limb force line and angle measurement thereof through an image processing method so as to improve the detection precision of the lower limb force line.

Description

technical field [0001] The invention relates to the field of medical imaging, in particular to a method and device for measuring force lines of lower limbs. Background technique [0002] The measurement of the force line of the lower limbs refers to the measurement of the length, angle and other mechanical parameters of the lower limbs through certain methods, using X-ray images, and comparing the differences between normal and deformed, providing reference for clinical and scientific research. The alignment of the lower limbs after total knee arthroplasty is very critical, and the correct placement of the prosthesis according to the alignment of the lower limbs is the key to a successful operation. Improper placement of the prosthesis can lead to pain, limited range of motion, looseness, wear and joint instability. In a sense, whether the line of force of the lower limbs is appropriate is related to postoperative rehabilitation. Therefore, the measurement of the lower lim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCA61B6/505A61B6/5217
Inventor 怀晓晨穆红章
Owner 瓴域影诺北京科技有限公司
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