Adult Femur CT Modeling And Three-Dimensional Automatic Measurement Of Anatomical Parameters And Analysis

Objective From accurate reconstruction of 3D models by adult femur CT scan data,and automated measure femoral anatomical parameters to study the characteristics of Chinese femur anatomical paraneters,which can provide preoperative reference for clinical surgery and provide data support for personalized design of internal fixation of the femoral side and design of internal fixation devices.Methods In the Mimics 17.0 software,the CT data was used for modeling,and the built model was imported into Geomagic Studio software.The anatomical landmarks such as the femoral surface and the medullary cavity were extracted to establish a three-dimensional coordinate system,and then the coordinate system was unified.The program was programmed by Matlab software.Using the nearest point iterative ICP algorithm and the three-dimensional automatic extraction algorithm of anatomical landmarks for precise positioning,automatic measure 20 items including ball diameter,neck angle,anteversion angle,femur curvature and proximal medullary cavity size anatomical parameters,and finally analyze and compare the data.Results The anatomical data of normal adults femur in China were different from those in foreign countries.The total femoral length and femoral neck length data were quite different.Domestic males and females also had large differences in many data,including ball diameter,neck length,prosthesis ML,Physiological ML,physiological AP,physiological medial lateral posterior malleolus size,femoral curvature,and proximal medullary cavity.All the P value<0.05,and it has statistically significant.And as the height increases,most of the anatomical parameters increase.Age and body mass index has no directly relation to most anatomical parameters.Conclusion There is a certain difference between the research at home and abroad.Therefore,it is necessary to establish and enrich the femoral anatomical database.It is also necessary to design and develop internal fixation products that meet the needs of Chinese people and even men and women,and improve the matching of implants and human femurs.