跳到主要內容

臺灣博碩士論文加值系統

(44.220.255.141) 您好!臺灣時間:2024/11/03 04:58
字體大小: 字級放大   字級縮小   預設字形  
回查詢結果 :::

詳目顯示

我願授權國圖
: 
twitterline
研究生:傅柏幃
研究生(外文):Fu, Po-Wei
論文名稱:創新的電阻抗斷層掃描方法
論文名稱(外文):A Novel Electrical Impedance Tomography Scheme
指導教授:蔡德明蔡德明引用關係
指導教授(外文):Choi, Charles T. M.
口試委員:董蘭榮李宜軒
口試委員(外文):Dung, Lan-RongLee, Yi-Hsuan
口試日期:2017-01-04
學位類別:碩士
校院名稱:國立交通大學
系所名稱:電機工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2017
畢業學年度:105
語文別:英文
論文頁數:54
中文關鍵詞:電阻抗斷層掃描虛擬電極解析度
外文關鍵詞:Electrical Impedance TomographyVirtual ElectrodeResolution
相關次數:
  • 被引用被引用:0
  • 點閱點閱:203
  • 評分評分:
  • 下載下載:0
  • 收藏至我的研究室書目清單書目收藏:0
隨著科技的進步,越來越多可以提供疾病診斷的醫學影像儀器被發明。目前常被醫院所使用的醫學影像技術技術有X光(X-ray)、電腦斷層掃描(Computed Tomography, CT)、核磁共振成像(Magnetic Resonance Imaging, MRI)以及超音波(Ultrasound)。
而較新的臨床造影技術-電阻抗斷層掃描(Electrical impedance tomography, EIT)最近也已經實際被應用在醫院。相較上列的成像儀器比起來有著便宜、即時、可攜帶、非侵入、連續且不會像CT以及MRI產生會使人病變的游離輻射等優點。
電阻抗斷層掃描原理是透夠刺激電流,量測範圍內導體的電阻抗變化來成像。除了醫療領域,EIT還有用在工業、軍事以及地質上。然而,電阻抗斷層掃描有著解析度較低的問題。因此,在台灣新竹交通大學的神經工程與介面實驗室提出虛擬通道電腦斷層掃描的方法,可以在固定的電極數目下來增加顯著的解析度。
結合先前提及的虛擬通道方法電腦斷層掃描下,本篇論文提出改變反問題模型的方法,以改善電阻抗斷層掃描使用虛擬電極時候的準確度。這個方法有用在二維影像的模擬以及假體實驗上。
With the advancements in technology, more medical imaging instrument which can provide diagnosis of diseases have been invented. The most commonly used medical imaging technologies in hospitals are: X-ray, Computed Tomography (CT), Magnetic Resonance Imaging (MRI) and Ultrasound.
The newest clinical medical imaging technology is called Electrical impedance tomography (EIT) which has been increasingly used in hospitals recently. Compare to the previous medical imaging technologies, EIT has the following advantages of being inexpensive, real time, portable, noninvasive, continuous and, unlike CT and x-ray, does not emit any ionizing radiation which is a leading cause of cancer.
EIT works on the principle of measuring the variations of the electrical impedance in the domain after current has been injected. EIT not only have has applications in the medical sector but also in industries, by militaries and in the field of geology. However, the major short coming of EIT is its low resolution. Therefore, the Neural Engineering and Interface Laboratory at the National Chiao Tung University in Hsinchu, Taiwan has published a method called virtual channel EIT, which can significantly improve the resolution with a fixed number of EIT electrode.
In conjunction with the previous virtual channel EIT, this thesis introduces a scheme to improve the resolution of EIT by changing the inverse modeling scheme. This method has been tested on two-dimensional imaging simulation and phantom experiments.
Abstract iv
Chapter 1: Introduction 1
1.1 Motivation 1
1.2 Thesis Organization 2
Chapter 2: Background Research 3
2.1 Electrical impedance Tomography (EIT) 3
2.1.1 The Basic Principle of Electrical Impedance Tomography 3
2.1.2 Phantom Experiment 4
2.1.3 Forward and Inverse Problem 6
2.1.4 Electrical Impedance and Diffuse Optical Reconstruction Software 7
2.1.5 Error Definition 9
2.2 Virtual Channel 10
2.3 Singular Value Decomposition (SVD) 15
Chapter 3: New Reconstruction Methods 17
3.1 Voltage Measurement 17
3.2 New Reconstruction Methods (NRM) 19
Chapter 4: New Reconstruction Methods Apply in Different Condition 23
4.1 Normalized electrode, target, position and direction ratio 23
4.2 First condition 32
4.3 Second condition 36
4.4 Third condition 40
4.5 Fourth condition 44
Chapter 5: Application of New Reconstruction Methods in Phantom Experiment 46
Chapter 6: Discussion 50
6.1 Discussion 50
6.2 Conclusion and Future Work 52
Reference 53
[1] T. K. Bera, “Bioelectrical Impedance Methods for Noninvasive Health Monitoring : A review,” J. Med. Eng., vol. 2014, pp. 1–34, 2013.
[2] R. P. Henderson andJ. G.Webster, “An impedance camera for spatially specific measurements of the thorax.,” IEEE Trans. Biomed. Eng., vol. 25, no. 3, pp. 250–254, 1978.
[3] D. C. Barber andB. H.Brown, “Applied potential tomography,” J. Br. Interplanet. Soc., vol. 42, no. 7, pp. 391–393, 1989.
[4] D. S. Holder, “Electrical Impedance Tomography: Methods, History and Applications,” CRC Press, p. 456, 2004.
[5] C. T. M. Choi, “Seminar on virtual channels in EIT,” in July 22, 2011.
[6] C. W. Lu, “High Resolution Two-dimensional and Three-dimensional Electrical Impedance Tomography,” National Chiao Tung University, 2013.
[7] L. Borcea, “Electrical impedance tomography,” Inverse Probl., vol. 18, no. 6, pp. R99–R136, 2002.
[8] 徐鳳鳴, “旋轉式電阻抗斷層攝影系統性能改善與應用,” 國立中央大學, 2007.
[9] A. Adler et al., “GREIT: a unified approach to 2D linear EIT reconstruction of lung images.,” Physiol. Meas., vol. 30, no. 6, pp. S35–S55, 2009.
[10] C. C. Hong, “Software Design for Real Time Lungs Electrical Impedance Tomography,” National Chiao Tung University, 2016.
[11] C. T. M. Choi and Y. Lee, “A Review of Stimulating Strategies for Cochlear Implants,” Cochlear Implant Res. Updat., vol. 2, no. 2005, p. 232, 2012.
[12] R. K. Y. Chin and T. A. York, “Improving spatial resolution for EIT reconstructed images through measurement strategies,” in 2013 IEEE International Conference on Signal and Image Processing Applications, 2013, pp. 5–10.
連結至畢業學校之論文網頁點我開啟連結
註: 此連結為研究生畢業學校所提供,不一定有電子全文可供下載,若連結有誤,請點選上方之〝勘誤回報〞功能,我們會盡快修正,謝謝!
QRCODE
 
 
 
 
 
                                                                                                                                                                                                                                                                                                                                                                                                               
第一頁 上一頁 下一頁 最後一頁 top