Institute for Surgical Technology and Biomechanics, University of Bern, Bern, Switzerland.
Adv Exp Med Biol. 2018;1093:105-112. doi: 10.1007/978-981-13-1396-7_9.
In this chapter, the reconstruction of 3D intensity volumes of femur, tibia, and three muscles around the thigh region from a pair of calibrated X-ray images is addressed. We present an atlas-based 2D-3D intensity volume reconstruction approach by combining a 2D-2D nonrigid registration-based 3D landmark reconstruction procedure with an adaptive regularization step. More specifically, an atlas derived from the CT acquisition of a healthy lower extremity, together with the input calibrated X-ray images, is used to reconstruct those musculoskeletal structures. To avoid the potential penetration of the reconstructed femoral and tibial volumes that might be caused by reconstruction error, we come up with an articulated 2D-3D reconstruction strategy, which can effectively preserve knee joint structure. Another contribution from our work is the application of the proposed 2D-3D reconstruction pipeline to derive the patient-specific volumes of three thigh muscles around the thigh region.
在本章中，我们致力于从一对校准的 X 射线图像重建股骨、胫骨和大腿区域周围的三块肌肉的三维强度体积。我们通过结合基于二维-二维非刚性配准的三维标志点重建过程和自适应正则化步骤，提出了一种基于图谱的二维-三维强度体积重建方法。具体来说，我们使用源自健康下肢 CT 采集的图谱和输入的校准 X 射线图像来重建这些肌肉骨骼结构。为了避免由于重建误差导致重建的股骨和胫骨体积可能出现的穿透，我们提出了一种铰接式的二维-三维重建策略，可以有效地保护膝关节结构。我们工作的另一个贡献是将提出的二维-三维重建管道应用于从大腿区域周围的三个大腿肌肉的患者特定体积中。
