本文關(guān)鍵詞：邊緣場(chǎng)成像中多功能調(diào)節(jié)的機(jī)械結(jié)構(gòu)設(shè)計(jì)　出處：《廈門大學(xué)學(xué)報(bào)(自然科學(xué)版)》2016年03期 　論文類型：期刊論文

  更多相關(guān)文章： 邊緣場(chǎng)成像 機(jī)械結(jié)構(gòu) 多功能調(diào)節(jié) 樣品升降

【摘要】：在邊緣場(chǎng)成像實(shí)驗(yàn)中,支撐樣品運(yùn)動(dòng)的機(jī)械結(jié)構(gòu)缺少調(diào)節(jié)環(huán)節(jié),運(yùn)動(dòng)形式單一,樣品外圍共振線圈采用固定化形式,無法滿足超強(qiáng)磁場(chǎng)周邊不規(guī)則梯度場(chǎng)變化的要求.本文在前期研究基礎(chǔ)上提出了一種多功能調(diào)節(jié)機(jī)械結(jié)構(gòu),該結(jié)構(gòu)具有獨(dú)立調(diào)節(jié)樣品以及共振線圈姿態(tài)和位置的功能.在一維邊緣場(chǎng)成像中保證樣品和共振線圈的中心軸線可同時(shí)與梯度場(chǎng)中磁場(chǎng)方向平行,并且實(shí)現(xiàn)了成像過程中樣品沿著磁場(chǎng)方向升降的方式;在三維邊緣場(chǎng)魔角旋轉(zhuǎn)成像過程中,可以保證樣品和共振線圈均與磁場(chǎng)方向呈魔角角度,并且在樣品旋轉(zhuǎn)成像時(shí)一旦出現(xiàn)回波信號(hào)不好或者無回波的情況,還可以實(shí)現(xiàn)樣品的實(shí)時(shí)性暫停和回轉(zhuǎn),以重新獲取樣品在該位置的信號(hào).更重要的是該機(jī)械結(jié)構(gòu)在三維成像過程中增加了樣品的升降功能,可以在更高梯度場(chǎng)中獲取樣品更精細(xì)的圖像.
[Abstract]:In the edge field imaging experiment, the mechanical structure supporting the motion of the sample is lack of adjusting link, the motion form is single, and the external resonance coil of the sample is immobilized. It can not meet the requirements of the irregular gradient field around the super strong magnetic field. In this paper, a multifunctional adjusting mechanical structure is proposed on the basis of previous research. The structure has the function of independently adjusting the sample and the orientation and position of the resonance coil. In the one-dimensional edge field imaging, the central axis of the sample and the resonance coil can be parallel to the magnetic field direction in the gradient field at the same time. The method of sample rising and falling along the direction of magnetic field is realized in the process of imaging. In the process of 3D edge field magic angle rotation imaging, both the sample and the resonance coil can be guaranteed to have a magic angle with the magnetic field direction, and once the echo signal is bad or no echo occurs in the sample rotation imaging. The real-time pause and rotation of the sample can also be realized in order to obtain the signal of the sample in this position again. More importantly, the mechanical structure increases the lifting function of the sample in the process of 3D imaging. A more refined image of the sample can be obtained in a higher gradient field.
【作者單位】： 廈門大學(xué)航空航天學(xué)院;廈門大學(xué)物理科學(xué)與技術(shù)學(xué)院;
【基金】：國家自然科學(xué)基金(21327001)
【分類號(hào)】：TH122
【正文快照】： (3):445-450.Citation:SHI J L,XUE W D,FENG W J,et al.Multi-functional Adjustable Mechanical Structure Designing in Stray Field Ima-ging[J].Journal of Xiamen University(Natural Science),2016,55(3):445-450.(in Chinese)邊緣場(chǎng)成像區(qū)別于傳統(tǒng)磁共振成像,它利用傳，

本文編號(hào)：1394720