無線電阻抗成像量測系統設計

Abstract

電阻抗成像 (Electrical impedance tomography, EIT) 是一種使用非侵入式的方法來量測人體的橫截面阻抗變化影像的系統。以往的研究中，提出了許多的電阻抗成像系統與阻抗影像重建演算法，但是大部分電阻抗成像的系統體積過於龐大，限制了在臨床上的應用。本論文發表一個無線可攜式的電阻抗成像量測系統，量測並重建待測物阻抗影像，藉由微型化傳統電阻抗成像系統，本系統具有體積小且可無線傳輸的優點，以期改善傳統電阻抗成像系統的應用限制。最後，論文中量測仿體實驗來驗證所提出的電阻抗成像系統的性能。由實驗結果顯示出阻抗重建影像的成像品質與其他常見電阻抗成像系統相似。因此，本無線電阻抗成像量測系統是一個良好的系統雛形，而且未來能夠應用在許多臨床上。

Electrical impedance tomography (EIT) is a non-invasive approach to reconstruct the cross-sectional impedance image of the body. Many EIT systems and impedance image reconstruction algorithm have been proposed in previous studies. However, most of these EIT system is bulky, and this also causes the limitation of applications. In this study, a wearable and wireless EIT system was proposed to reconstruct the impedance image non-invasively and wirelessly. By microminiaturizing the conventional EIT system, the proposed system can provide the advantages of small volume and wireless transmission to improve the application limitation of the conventional EIT systems. Finally, the phantom experiment was tested to validate the performance of the proposed EIT system. The experimental results show the image quality of impedance image reconstruction obtained by the proposed EIT system is similar to other conventional EIT systems. Therefore, the proposed wearable and wireless EIT system can be viewed as a good system prototype, and may be applied in more clinical applications in the future.