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Segmentation of the knee MRI images is essential for subsequent quantification of clinical parameters and treatment planning for knee prosthesis replacement. However, the segmentation remains difficult due to individual differences in anatomy, the difficulty of obtaining accurate edges at lower resolutions, and the presence of speckle noise and artifacts in the images. In addition, radiologists must manually measure the knee's parameters which is a laborious and time\u2010consuming process.<\/jats:p><\/jats:sec><jats:sec><jats:title>Purpose<\/jats:title><jats:p>Automatic quantification of femoral morphological parameters can be of fundamental help in the design of prosthetic implants for the repair of the knee and the femur. Knowledge of knee femoral parameters can provide a basis for femoral repair of the knee, the design of fixation materials for femoral prostheses, and the replacement of prostheses.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This paper proposes a new deep network architecture to comprehensively address these challenges. A dual output model structure is proposed, with a high and low layer fusion extraction feature module designed to extract rich features through the cross\u2010fusion mechanism. A multi\u2010scale edge information extraction spatial feature module is also developed to address the boundary\u2010blurring problem.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Based on the precise automated segmentation results, 10 key clinical parameters were automatically measured for a knee femoral prosthesis replacement program. The correlation coefficients of the quantitative results of these parameters compared to manual results all achieved at least 0.92. The proposed method was extensively evaluated with MRIs of 78 patients\u2019 knees, and it consistently outperformed other methods used for segmentation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>The automated quantization process produced comparable measurements to those manually obtained by radiologists. This paper demonstrates the viability of automatic knee MRI image segmentation and quantitative analysis with the proposed method. This provides data to support the accuracy of assessing the progression and biomechanical changes of osteoarthritis of the knee using an automated process, thus saving valuable time for the radiologists and surgeons.<\/jats:p><\/jats:sec>","DOI":"10.1002\/mp.16665","type":"journal-article","created":{"date-parts":[[2023,8,27]],"date-time":"2023-08-27T01:55:04Z","timestamp":1693101304000},"page":"1145-1162","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Dual output feature fusion networks for femoral segmentation and quantitative analysis of the knee joint"],"prefix":"10.1002","volume":"51","author":[{"given":"Dongdong","family":"He","sequence":"first","affiliation":[{"name":"College of Biomedical Engineering Taiyuan University of Technology  Taiyuan Shanxi China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuan","family":"Guo","sequence":"additional","affiliation":[{"name":"College of 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