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Three-dimensional femoral model visualization method

A technology of three-dimensional model and femur, which is applied in the field of image processing, can solve the problems of bulky femoral image display and inability to obtain three-dimensional space information, and achieve the effects of reducing the incidence of missed detection and misdiagnosis, low cost, and small harmful radiation

Inactive Publication Date: 2012-08-29
HARBIN INST OF TECH +1
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing direct digital X-ray image DR cannot obtain three-dimensional space information, and the use of CT is not suitable for femur image display in sudden situations due to its large volume, and provides a visualization method for a three-dimensional model of the femur

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  • Three-dimensional femoral model visualization method

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specific Embodiment approach 1

[0014] Specific implementation mode one: combine figure 1 Describe the present embodiment, the femur three-dimensional model visualization method described in the present embodiment, it comprises the following steps:

[0015] Step 1. Establish a three-dimensional model of the general femur, obtain the projection contour of the three-dimensional femoral model of the general femur through the anteroposterior projection of the three-dimensional model of the general femur, and obtain the projection contour of the three-dimensional lateral femur model of the general femur through the lateral projection of the three-dimensional model of the general femur ;

[0016] Step 2. Preprocess the anteroposterior DR image of the femur and the lateral DR image of the femur to be modeled, extract the femoral edge contour in the anteroposterior DR image of the femur to obtain the anteroposterior femoral edge contour, and extract the femoral edge in the lateral femoral DR image Contour to obtain...

specific Embodiment approach 2

[0020] Specific implementation mode two: combination Figure 6 and Figure 7 Describe this embodiment. This embodiment is a further limitation of the method for visualization of the 3D femur model described in Embodiment 1. In step 1, a general 3D femur model is established, and the projection contour of the general 3D femur model is obtained through front and side projection of the general 3D femur model. The process is:

[0021] Step 11, select a common femur to carry out CT scanning to it, obtain the CT slice of the common femur, and construct the three-dimensional model of the common femur according to the CT slice of the common femur;

[0022] Step 12: Carry out anteroposterior projection to the universal femur three-dimensional model to obtain the projection contour of the anteroposterior universal femoral three-dimensional model, and perform lateral projection to the universal femoral three-dimensional model to obtain the projection contour of the lateral universal fem...

specific Embodiment approach 3

[0042] Specific embodiment three: this embodiment is a further limitation of the femur three-dimensional model visualization method described in embodiment one. In step two, the process of preprocessing the femoral anteroposterior DR image and the femoral lateral DR image to be modeled is as follows: The modeled femoral anteroposterior DR images and femoral lateral DR images were subjected to median filtering.

[0043] The median filter method was used to perform image enhancement preprocessing on the anteroposterior DR image of the femur and the lateral DR image of the femur to reduce noise and highlight the characteristics of anatomical structures.

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Abstract

A three-dimensional femoral model visualization method relates to the field of image processing. The invention solves the problems that: at present, the adopted direct digital radiography (DR) cannot acquire three-dimensional space information, and due to large size, the adopted CT (computer tomography) is not suitable for displaying a fracture image under emergency. The three-dimensional femoral model visualization method includes the following steps: (1) a universal three-dimensional femoral model is built; (2) a femoral posteroanterior DR image to be modeled and a femoral lateral DR image to be modeled are preprocessed; (3) the registration transformation relation of the posteroanterior image is determined, and the registration transformation relation of the lateral image is determined; (4) the three-dimensional posture estimation of a femur to be modeled is carried out, and the three-dimensional femoral model posture is visualized. The method utilizes the two planar DR images to visualize the three-dimensional model of the femur, and imaging is rapid. The method is suitable for displaying three-dimensional femoral images.

Description

technical field [0001] The invention relates to the field of image processing. Background technique [0002] The femur is a typical human long bone with an irregular spatial structure consisting of cancellous bone at both ends and tubular cortical bone in the middle. The visualization of the three-dimensional model of the femur is extremely important for the preoperative diagnosis of femoral fractures and the formulation of surgical plans. [0003] At present, direct digital X-ray image DR (Digital Radiography) is mainly used for domestic fracture image display, but the biggest defect of this method is that two-dimensional projection imaging causes image overlap and loses a lot of three-dimensional spatial information, which is of great importance to doctors. Clinical diagnosis is just very important; on the other hand, although the existing medical three-dimensional visualization technology such as computer tomography imaging CT (Computer Tomography) can obtain the precise...

Claims

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Application Information

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IPC IPC(8): G06T17/10G06T19/20
Inventor 张斌孙金玮孙绍斌孟尚
Owner HARBIN INST OF TECH