Department of Mathematics, Colorado State University, Fort Collins, CO 80523, USA.
IEEE Trans Med Imaging. 2013 Apr;32(4):757-69. doi: 10.1109/TMI.2012.2237389. Epub 2013 Jan 9.
Electrical impedance tomography (EIT) is a medical imaging technique in which current is applied on electrodes on the surface of the body, the resulting voltage is measured, and an inverse problem is solved to recover the conductivity and/or permittivity in the interior. Images are then formed from the reconstructed conductivity and permittivity distributions. In the 2-D geometry, EIT is clinically useful for chest imaging. In this work, an implementation of a D-bar method for complex admittivities on a general 2-D domain is presented. In particular, reconstructions are computed on a chest-shaped domain for several realistic phantoms including a simulated pneumothorax, hyperinflation, and pleural effusion. The method demonstrates robustness in the presence of noise. Reconstructions from trigonometric and pairwise current injection patterns are included.
电阻抗断层成像（EIT）是一种医学成像技术，它通过在体表电极上施加电流，测量产生的电压，并通过反问题求解来恢复体内的电导率和/或介电常数。然后根据重建的电导率和介电常数分布形成图像。在二维几何中，EIT 对胸部成像具有临床应用价值。在这项工作中，提出了一种在一般二维域上对复电导率使用 D-bar 方法的实现。具体来说，在包括模拟气胸、过度充气和胸腔积液的几个实际体模上对胸部形状的域进行了重建。该方法在存在噪声的情况下具有稳健性。包括了使用三角和成对电流注入模式的重建。
