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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/34384完整後設資料紀錄
| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 林啟萬(Chii-Wann Lin) | |
| dc.contributor.author | Bing-Kuan Lin | en |
| dc.contributor.author | 林秉寬 | zh_TW |
| dc.date.accessioned | 2021-06-13T06:05:54Z | - |
| dc.date.available | 2011-08-16 | |
| dc.date.copyright | 2011-08-16 | |
| dc.date.issued | 2011 | |
| dc.date.submitted | 2011-07-26 | |
| dc.identifier.citation | [1] Goldschlager and Goldman, Principles of Clinical Electrocardiography 13/e Appleton and Lange, Chinese edition by Yi Hsien Publishing Co., Ltd, 1996.
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[30] Cetin A.E.; Koymen H.; Aydin M.C., 'Multichannel ECG data compression by multirate signal processing and transform domain coding techniques,' Biomedical Engineering, IEEE Transactions on , vol.40, no.5, pp.495-499, May 1993. [31] Wilson F.N.; Johnston F.D.; Macleod A.G.; Barker P.S., 'Electrocardiograms that represent the potential variations of a single electrode.' Am. Heart J. 9: 447-71, 1934. [32] Miyamoto N. and Shimizu Y. et al, 'The absolute voltage and the lead vector of Wilson's central terminal.' Jpn Heart J., 37(2):203-14, Mar. 1996. [33] J. A. Van Alste; T. S. Schilder, 'Removal of Base-Line Wander and Power-Line Interference from the ECG by an Efficient FIR Filter with a Reduced Number of Taps,' IEEE Transactions On Biomedical Engineering, Vol. BME-32, NO. 12, Dec. 1985. [34] Yong Lian and Jiang Hong Yu, 'The Reduction of Noises in ECG Signal Using a Frequency Response Masking Based FIR Filter,' IEEE International Workshop on Biomedical Circuits & Systems, 2004. 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[49] Madhero88, 'Diagram showing the connection of ECG leads' from http://zh.wikipedia.org/wiki/-File:ECGcolor.svg, May 3, 2009. [50] South Park Digital Studios LLC, http://www.southparkstudios.com/ , 2011. [51] BioMag Laboratory, HUSLAB, Helsinki University Central Hospital, http://www.biomag.hus.fi/. [52] 丁建元、鄭智銘, '心電圖原理簡介', 老人福祉科技研發中心 , April 3, 2001. | |
| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/34384 | - |
| dc.description.abstract | 心電圖(Electrocardiography)是利用圖形的方式，將身體表面的電位變化紀錄下來，用以描述心臟搏動的變化，為醫學上用於判斷心臟狀態時不可或缺的依據。相較於傳統的十二導程心電圖，另一種方式，是以量測多處體表的電位來觀測心臟狀態，由於近幾年硬體設備的進步，以各種不同的測量方式來得到多導程的心電圖，陸續提出相關的研究，提供更多的醫療價值。以空間中的向量為基礎，解釋心臟電生理的傳導稱為向量心電圖(Vectorcardiography)，其理論將心臟假想成三維空間中的雙極發電器(Dipole Generator)，於體表不同的位置觀察其大小及方向的變化，即可記錄成心電圖，依據此假說，建立了現今的向量心電圖學，本研究以向量心電圖為理論基礎，以KL轉換(Karhunen-Loeve Transform)演算法來找出心電訊號的最佳基底進行多導程心電圖的重建，不同於向量心電圖理論使用的空間座標軸，KL轉換可以找出心電訊號的最佳基底，做為表示雙極發電器假說的基底，該演算法已廣泛使用於訊號或圖片的壓縮及傳輸，利用最小的均方差(Mean Square Error)求得基底，並稱為最佳化基底；在此利用其特性來做重建的工作，本研究應用於心電圖的多導程重建上，利用在身體表面少數的固定導程，計算出基底後，可以重建出任意位置的心電訊號，並藉由同步重建多個位置的訊號，達到多導程心電圖的目的，論文最後列上重建的操作流程供使用者參考，讓此重建多導程心電圖的研究，更容易理解與實作。 | zh_TW |
| dc.description.provenance | Made available in DSpace on 2021-06-13T06:05:54Z (GMT). No. of bitstreams: 1 ntu-100-R98548057-1.pdf: 3172901 bytes, checksum: 57743e6b3c5165c4e3ea3acbe62488f0 (MD5) Previous issue date: 2011 | en |
| dc.description.tableofcontents | 誌謝 ...................................................................................................................................i
中文摘要 .......................................................................................................................... ii ABSTRACT .................................................................................................................... iii CONTENTS .....................................................................................................................iv LIST OF FIGURES ........................................................................................................ vii LIST OF TABLES ............................................................................................................ix Chapter 1 緒論............................................................................................................ 1 1.1 研究動機與目的 ............................................................................................ 1 1.2 傳統心電圖到多導程心電圖 ........................................................................ 2 1.2.1 體表面電位圖(Body Surface Potential Map) ....................................... 4 1.2.2 心磁圖(Magnetocardiography) ............................................................. 5 1.2.3 心向量投影(Heart-Vector Projection) .................................................. 6 1.3 論文架構 ........................................................................................................ 7 Chapter 2 多導程心電圖重建模型與理論 ............................................................... 8 2.1 心臟的電位傳導 ............................................................................................ 8 2.2 向量心電圖(Vectorcardiography)模型 .......................................................... 9 2.2.1 FRANK 模型與Einthoven 三角形 ................................................... 10 2.2.2 心向量與位置向量的表示法 ............................................................. 12 2.2.3 位置向量與電位之關係 ..................................................................... 12 2.3 KL 轉換(Karhunen-Loeve Transform) ........................................................ 13 2.3.1 基底變換 ............................................................................................. 13 2.3.2 KL 轉換方法與步驟 .......................................................................... 14 2.4 Moore-Penrose pseudoinverse ...................................................................... 17 Chapter 3 重建模型之架構與其方法 ..................................................................... 19 3.1 心電圖數據的量測 ...................................................................................... 19 3.1.1 單極(Unipolar)導程與Wilson Central Terminal ............................... 19 3.1.2 心電圖訊號濾波器 ............................................................................. 20 3.2 重建模型之校正階段 .................................................................................. 22 3.2.1 固定導程與重建導程 ......................................................................... 22 3.2.2 取得最佳化基底 ................................................................................. 23 3.2.3 相關性係數的求得 ............................................................................. 23 3.3 重建模型之重建階段 .................................................................................. 24 3.3.1 以Moore-Penrose pseudoinverse 重建基底 ...................................... 24 3.3.2 訊號輸出與Savitzky-Golay filter ...................................................... 25 Chapter 4 最佳化分析與討論 ................................................................................. 27 4.1 參數最佳化 .................................................................................................. 27 4.1.1 PSNR (Peak Signal to Noise Ratio) .................................................... 27 4.1.2 相關矩陣與共變異數矩陣 ................................................................. 28 4.1.3 基底數量選擇 ..................................................................................... 28 4.1.4 直流訊號飄移 ..................................................................................... 30 4.1.5 Savitzky-Golay filter 參數最佳化 ...................................................... 30 4.1.6 係數取得訓練集 (Training Set)時間長度 ........................................ 32 4.1.7 重建區段(Reconstruct Segment)時間長度 ........................................ 33 4.1.8 重建模型的即時性(Real Time) .......................................................... 34 4.1.9 重建模型的時效性(Long-Term Use) ................................................. 35 4.1.10 相關性係數的泛用性 ......................................................................... 36 4.2 重建模型誤差探討 ...................................................................................... 37 4.2.1 基底選擇之誤差 ................................................................................. 37 4.2.2 以Moore-Penrose pseudoinverse 重建基底之誤差 .......................... 39 4.2.3 增加固定導程數目 ............................................................................. 39 4.3 結果討論與範例 .......................................................................................... 41 Chapter 5 結論.......................................................................................................... 45 5.1 重建的標準作業流程 .................................................................................. 45 5.1.1 校正階段 ............................................................................................. 45 5.1.2 重建階段 ............................................................................................. 46 REFERENCE .................................................................................................................. 48 | |
| dc.language.iso | zh-TW | |
| dc.subject | KL轉換 | zh_TW |
| dc.subject | 多導程心電圖 | zh_TW |
| dc.subject | VCG | zh_TW |
| dc.subject | 重建 | zh_TW |
| dc.subject | Karhunen-Loeve Transform | en |
| dc.subject | Reconstruct | en |
| dc.subject | VCG | en |
| dc.subject | multi-lead ECG | en |
| dc.title | 以Karhunen-Loeve轉換之最佳基底重建多導程心電圖 | zh_TW |
| dc.title | Reconstructing multi-lead ECG with optimal basis chosen by Using Karhunen-Loeve Transform | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 99-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 吳造中(Chau-Chung Wu),蕭子健(Tzu-Chien Hsiao) | |
| dc.subject.keyword | 多導程心電圖,VCG,KL轉換,重建, | zh_TW |
| dc.subject.keyword | multi-lead ECG,VCG,Karhunen-Loeve Transform,Reconstruct, | en |
| dc.relation.page | 51 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2011-07-26 | |
| dc.contributor.author-college | 工學院 | zh_TW |
| dc.contributor.author-dept | 醫學工程學研究所 | zh_TW |
| 顯示於系所單位： | 醫學工程學研究所 | |
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