研究生: |
唐筱玫 Xiao Mei Tang |
---|---|
論文名稱: |
磁粒子造影系統之架設與特性量測 The system construction and characteristic quantity of magneric particle imaging |
指導教授: |
洪姮娥
Horng, Herng-Er 楊鴻昌 Yang, Hong-Chang |
學位類別: |
碩士 Master |
系所名稱: |
光電工程研究所 Graduate Institute of Electro-Optical Engineering |
論文出版年: | 2013 |
畢業學年度: | 101 |
語文別: | 中文 |
論文頁數: | 4 |
中文關鍵詞: | 磁粒子 、梯度場 、強力磁鐵 、造影 |
英文關鍵詞: | MPI |
論文種類: | 學術論文 |
相關次數: | 點閱:123 下載:0 |
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摘要
本論文「磁粒子造影系統之架設與特性量測」是由一對環形強力磁鐵來產生梯度場,和以激發線圈產生交流場,再由一組同心園接收線圈接收訊號所組成的架構,並且選用超順磁性(super-paramagnetic properties)磁奈米粒子(the magnetic nanoparticles)作為量測樣品[2]。磁鐵是以銣鐵硼(NdFeB)材料做成的兩個環形強力磁鐵(ring magnets),我們用壓克力板和銅螺桿固定磁鐵,以N極-N極相對的方式,並且測量在兩磁鐵中間的磁場分布,此磁場為梯度場(gradient)。且量測到磁鐵產生的橫向梯度場為dB⁄dx = dB⁄dy = 3.69 T/m,縱向梯度場為 dB⁄dz = 6.43 T/m [2]。然後實驗架構所需要的交流場是由一激發線圈產生的,經過量測後激發線圈的磁場可達到B = 30 mTpp[6]。再製作一組內外同心圓的接收線圈(receive coils)放在激發線圈內部,並且接收線圈是以反接的方式組成的。為了使接收線圈因激發線圈而產生的感應電流能夠相消的程度更好,再製作一相減電路把內外接收線圈的磁場作相減。
關鍵字: 磁粒子、梯度場、強力磁鐵、造影、MPI 。
關鍵字: 磁粒子、梯度場、強力磁鐵、MPI
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