Acetabular tissue model reconstruction method for serialized hip joint CT images

Abstract

The invention discloses a reconstruction method of an acetabular tissue model oriented to serialized CT images of the hip joint. Select the point with the largest gradient on the vertical line on the line; traverse the thick contour of the femoral head to obtain the contour point set of the point with the largest gradient on the tangent vertical line; the points in the contour point set are connected to form the fine contour of the femoral head tissue in the CT slice ; Sequential femoral head contour extraction step, sequence acetabular image extraction step and three-dimensional reconstruction step. Based on the bone shape of the patient's individual hip joint, the present invention obtains individualized relevant position parameters, performs acetabular segmentation in CT images, and obtains accurate acetabular tissue images and three-dimensional models, which are used for the subsequent personalized reflection of the artificial femoral head prosthesis. For modeling, no prior knowledge obtained by training with other data sets is required, and the implementation is simple.

Description

technical field [0001] The invention relates to a method for reconstructing an acetabular tissue model, in particular to a method for reconstructing an acetabular tissue model oriented to serialized CT images of the hip joint. Involving patent classification A61 Medicine or veterinary medicine; Hygiene A61B Diagnosis; Surgery; Appraisal A61B6 / 00 Apparatus for radiodiagnosis, such as A61B6 / 02 Apparatus for diagnosis in different planes combined with radiotherapy equipment in sequence; Stereoradiography Diagnostic A61B6 / 03 computerized tomography camera. Background technique [0002] In the hemihip replacement clinical operation for the treatment of femoral head necrosis, the shape of the acetabular bone varies greatly in different patients. If a standard artificial femoral head prosthesis is used, the postoperative effect is not ideal. Personalized design is very necessary. The following technical solutions are now adopted to solve this problem; [0003] Technology 1: Segm...

AI Technical Summary

Problems solved by technology

[0007] However, the above-mentioned technologies have defects: for example, the shape of each patient's hip joint is very different, and the obtained prior shape is difficult to match with the specific patient. Individualized segmentation of the femoral head

Furthermore, the whole process requires complex manual interaction, which requires high experience of operators, and the segmentation results obtained by different operators may vary greatly

Finally, if you use an intelligent algorithm, you need to accumulate a large number of data set samples to ensure that the results are relatively correct, which is very difficult to achieve. It is difficult for ordinary non-medical college affiliated hospitals to accumulate enough samples

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