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用于单步定量磁化率映射重建的射频发射相关相位误差引起的信号非均匀性的改进。

Improvement of Signal Inhomogeneity Induced by Radio-frequency Transmit-related Phase Error for Single-step Quantitative Susceptibility Mapping Reconstruction.

机构信息

Department of Radiology, Nagoya City University Hospital.

Healthcare Business Unit, Hitachi, Ltd.

出版信息

Magn Reson Med Sci. 2019 Oct 15;18(4):276-285. doi: 10.2463/mrms.tn.2018-0066. Epub 2019 Feb 25.

DOI:10.2463/mrms.tn.2018-0066
PMID:30799332
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6883092/
Abstract

To mitigate the susceptibility inhomogeneity induced by radio-frequency transmit phase error through the whole brain in quantitative susceptibility mapping (QSM) using single-echo gradient echo sequence, we developed a novel single-step QSM reconstruction algorithm and compared it with a previous algorithm in five healthy volunteers. The proposed algorithm had effectively suppressed the susceptibility inhomogeneity through the whole brain and achieved acceptable quality, similar to that of the susceptibility map calculated from a multi-echo gradient echo sequence.

摘要

为了减轻单回波梯度回波序列定量磁化率映射（QSM）中射频发射相位误差引起的全脑磁化率不均匀性，我们开发了一种新的单步 QSM 重建算法，并在五名健康志愿者中对其与之前的算法进行了比较。所提出的算法有效地抑制了整个大脑的磁化率不均匀性，并且获得了可接受的质量，类似于从多回波梯度回波序列计算得到的磁化率图。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/8a8abb88fd7a/mrms-18-276-g5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/1fb6c0351de0/mrms-18-276-g1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/0548612842d1/mrms-18-276-g2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/a45225f428b5/mrms-18-276-g3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/9d336d8af287/mrms-18-276-g4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/8a8abb88fd7a/mrms-18-276-g5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/1fb6c0351de0/mrms-18-276-g1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/0548612842d1/mrms-18-276-g2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/a45225f428b5/mrms-18-276-g3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/9d336d8af287/mrms-18-276-g4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/65a1/6883092/8a8abb88fd7a/mrms-18-276-g5.jpg

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本文引用的文献

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利用磁敏感性通过氧摄取分数检测急性缺血性脑卒中患者的半暗带
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定量磁化率映射：来自 2016 年重建挑战赛的报告。
Magn Reson Med. 2018 Mar;79(3):1661-1673. doi: 10.1002/mrm.26830. Epub 2017 Jul 31.
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