Nakajima Yoshikazu, Tashiro Takahito, Sugano Nobuhiko, Yonenobu Kazuo, Koyama Tsuyoshi, Maeda Yuki, Tamura Yuichi, Saito Masanobu, Tamura Shin'ichi, Mitsuishi Mamoru, Sugita Naohiko, Sakuma Ichiro, Ochi Takahiro, Matsumoto Yoichiro
School of Engineering, The University of Tokyo, Tokyo 113-8657, Japan.
IEEE Trans Biomed Eng. 2007 Sep;54(9):1703-6. doi: 10.1109/TBME.2007.900822.
A new method for fluoroscopic tracking of a proximal bone fragment in femoral fracture reduction is presented. The proposed method combines 2-D and 3-D image registration from single-view fluoroscopy with tracking of the head center position of the proximal femoral fragment to improve the accuracy of fluoroscopic registration without the need for repeated manual adjustment of the C-arm as required in stereo-view registrations. Kinematic knowledge of the hip joint, which has a positional correspondence with the femoral head center and the pelvis acetabular center, allows the position of the femoral fragment to be determined from pelvis tracking. The stability of the proposed method with respect to fluoroscopic image noise and the desired continuity of the fracture reduction operation is demonstrated, and the accuracy of tracking is shown to be superior to that achievable by single-view image registration, particularly in depth translation.
本文提出了一种用于股骨骨折复位中近端骨块透视跟踪的新方法。该方法将单视角透视的二维和三维图像配准与近端股骨骨块头部中心位置的跟踪相结合，无需像立体视角配准那样反复手动调整C形臂，即可提高透视配准的准确性。髋关节的运动学知识与股骨头中心和骨盆髋臼中心存在位置对应关系，利用这一关系可通过骨盆跟踪确定股骨骨块的位置。文中展示了该方法在透视图像噪声方面的稳定性以及骨折复位操作所需的连续性，并且跟踪精度优于单视角图像配准，尤其是在深度平移方面。
