| Summary: | 碩士 === 國立中央大學 === 生物醫學工程研究所 === 102 === A C-arm image assisted surgical navigation system for spine surgery has been developed to enable the surgeon to position surgical tools accurately and safely. It only needs two C-arm images to compute the orientations and positions of the targets, which reduces radiation exposure to the surgical team and patient. Software verification of the system is performed in this study to improve and verify its reliability and robustness. A new feature of the system for diaphyseal femoral fracture reduction is also developed.
Based on the symmetric characteristic of both femurs of single person, the anatomic dimensions of non-fractured femur are used as a navigation reference to reconstruct fractured femur. The anatomic dimensions are determined by the proximal and distal femoral frames of non-fractured and fractured femur defined by anatomic characteristics of the femurs. An optical tracker is applied to real-time measure the anatomic dimensions of fractured femur. Utilizing the dimension difference between non-fractured and fractured femur, diaphyseal femoral fracture reduction can be completed.
An experiment of two different femoral fracture models is applied to verify the performance of image-guided navigation system for diaphyseal femoral fracture reduction surgery. The results show that the distance error of the origin of target frame is about 4mm, axial direction error is less than 6 degrees, and the femoral length error is less than 3mm after reduction.
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