Shape corrections for 3D EIT

Shape corrections for 3D EIT
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3D EIT 的形状校正

DOI:
10.1088/1742-6596/224/1/012049
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发表时间:
2010
期刊:
Conference Series
影响因子:
--
通讯作者:
Paridis K
Paridis K
中科院分区:
--
文献类型:
--
作者:
Paridis K

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相似文献

生物医学电阻抗断层扫描 (EIT) 中的边界移动一直是图像重建的误差源。在肺部 EIT 的情况下,患者的胸部形状在呼吸过程中发生变化是不可避免的,因此必须能够校正形状变化并从而避免伪影。假设电导率是各向同性的,这一假设对于肺组织来说是合理的,但对于肌肉来说无疑是违反的,理论上,莫比乌斯变换(共形映射)的边界形状以及电导率可以通过 3D EIT 数据确定。虽然在二维中,共形映射的空间是无限维的,但在三维情况下,莫比乌斯变换由有限数量的参数给出。在本文中,我们专注于三维情况并采取线性近似。我们将给出类似于 Boyle 等人关于 3D EIT 中电极运动和形状误差影响的二维工作的数值研究结果。
Movement of the boundary in biomedical Electrical Impedance Tomography (EIT) has been always a source of error in image reconstruction. In the case of pulmonary EIT, where the patient's chest shape changes during respiration, this is inevitable, so it is essential to be able to correct for shape changes and consequently avoid artifacts. Assuming that the conductivity is isotropic, an assumption that is reasonable for lung tissue but admittedly violated for muscle, the boundary shape up to a Möbius transformation (conformal mapping) as well as the conductivity can theoretically be determined by 3D EIT data. While in two dimensions the space of conformal mappings are infinite dimensional, in the three dimensional case the Möbius transformations are given by a finite number of parameters. In this paper, we concentrate on the three dimensional case and take a linear approximation. We will give results of numerical studies analogous to the two dimensional work of Boyle et al on the effect of electrode movement and shape error in 3D EIT.
DOI: 10.1088/0266-5611/14/1/012
发表时间: 2008
期刊: Inverse Problems
影响因子: 2.1
作者:
A. Boyle;W. Lionheart;C. Gomez;A. Adler
通讯作者: A. Adler