Gradient shimming based on regularized estimation for B0-field and shim functions
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- 作者：Kan Songa ; b ; Qingjia Baoa ; baoqingjiahaoba@163.com" class="auth_mail" title="E-mail the corresponding author ; Fang Chena ; Chongyang Huanga ; Jiwen Fenga ; Chaoyang Liua ; chyliu@wipm.ac.cn" class="auth_mail" title="E-mail the corresponding author
- 关键词：NMR spectrometer ; Gradient shimming ; B0 inhomogeneity ; Penalized Maximum Likelihood ; Regularized estimation ; Field mapping
- 刊名：Journal of Magnetic Resonance
- 出版年：2016
- 出版时间：July 2016
- 年：2016
- 卷：268
- 期：Complete
- 页码：1-9
- 全文大小：3656 K
文摘
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The regularized estimation for B0-field and shim functions is proposed.
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The approach exploits three facts: the noise in the measurements is Gaussian, the field maps tend to be smooth, and shim coil is generally built to generate a spherical harmonic field.
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The robustness to SNR for field mapping and shimming results is demonstrated.