Reconstruction of MRI data encoded by multiple nonbijective curvilinear magnetic fields

NCU Institutional Repository > 生醫理工學院 > 認知與神經科學研究所 > 期刊論文 > Item 987654321/108079

請使用永久網址來引用或連結此文件: https://ir.lib.ncu.edu.tw/handle/987654321/108079

題名:	Reconstruction of MRI data encoded by multiple nonbijective curvilinear magnetic fields
作者:	郭文瑞;Lin, Fa-Hsuan;Witzel, Thomas;Schultz, Gerrit;Gallichan, Daniel;Kuo, Wen-Jui;Wang, Fu-Nien;Hennig, Juergen;Zaitsev, Maxim;Belliveau, John W.
貢獻者:	生醫理工學院認知神經科學研究所
關鍵詞:	Algorithms;Brain - anatomy & histology;Humans;Image Enhancement - methods;Image Interpretation, Computer-Assisted - methods;Magnetic Fields;Magnetic Resonance Imaging - methods;MRI;nonlinear gradients;parallel MRI;PatLoc;Pattern Recognition, Automated - methods;Reproducibility of Results;Sensitivity and Specificity;surface gradients;time-domain reconstruction
日期:	2012-01-01
上傳時間:	2026-04-23 14:34:46 (UTC+8)
出版者:	John Wiley and Sons Inc.;Hoboken: Wiley Subscription Services, Inc., A Wiley Company
摘要:	摘要： Parallel imaging technique using localized gradients (PatLoc) uses the combination of surface gradient coils generating nonbijective curvilinear magnetic fields for spatial encoding. PatLoc imaging using one pair of multipolar spatial encoding magnetic fields (SEMs) has two major caveats: (1) The direct inversion of the encoding matrix requires exact determination of multiple locations which are ambiguously encoded by the SEMs. (2) Reconstructed images have a prominent loss of spatial resolution at the center of field‐of‐view using a symmetric coil array for signal detection. This study shows that a PatLoc system actually has a higher degree of freedom in spatial encoding to mitigate the two challenges mentioned above. Specifically, a PatLoc system can generate not only multipolar but also linear SEMs, which can be used to reduce the loss of spatial resolution at the field‐of‐view center. Here, we present an efficient and generalized image reconstruction method for PatLoc imaging using multiple SEMs without explicitly identifying the locations where SEM encoding is not unique. Reconstructions using simulations and empirical experimental data are compared with those using conventional linear gradients to demonstrate that the general combination of SEMs can improve image reconstructions. Magn Reson Med, 2012. © 2012 Wiley Periodicals, Inc. 其他題名： Magnetic Resonance Medicine 出版者： Hoboken: Wiley Subscription Services, Inc., A Wiley Company 出版日期： 2012-10 出處： Magnetic resonance in medicine, 2012-10, Vol.68 (4), p.1145-1156 資源來源： Wiley Online Journals ** 版權： Copyright © 2012 Wiley Periodicals, Inc. 識別號： ISSN: 0740-3194 識別號： ISSN: 1522-2594 識別號： EISSN: 1522-2594 識別號： DOI: 10.1002/mrm.24115 識別號： PMID: 22246786
顯示於類別:	[認知與神經科學研究所 ] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	19	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....