基于两步法的各向异性体解剖结构约束的电阻抗断层成像。

Anatomically constrained electrical impedance tomography for anisotropic bodies via a two-step approach.

机构信息

Dept. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM.

出版信息

IEEE Trans Med Imaging. 1995;14(3):498-503. doi: 10.1109/42.414615.

Abstract

Discusses the inclusion of anatomical constraints and anisotropy in static Electrical Impedance Tomography (EIT) using a two-step approach to EIT. In the first step, the boundaries between regions of different conductivities are anatomically constrained using Magnetic Resonance Imaging (MRI) data. In the second step, the conductivity values in different regions are determined. Anisotropic conductivity regions are included to allow better modeling of the muscle regions (e.g., skeletal muscle) which exhibit a greater conductivity in the direction parallel to the muscle fiber. This two-step approach is used to reconstruct the conductivity profile of a canine torso, illustrating its potential application in extracting conductivity values for bioelectric modeling.

摘要

讨论了在静态电阻抗断层成像（EIT）中使用两步法纳入解剖约束和各向异性。在第一步中，使用磁共振成像（MRI）数据对不同电导率区域之间的边界进行解剖约束。在第二步中，确定不同区域的电导率值。包括各向异性电导率区域，以更好地模拟表现出与肌肉纤维平行方向上更大电导率的肌肉区域（例如骨骼肌）。这种两步法用于重建犬体的电导率分布，说明其在提取生物电建模的电导率值方面的潜在应用。