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利用心血管磁共振敏感性加权成像（SWI）对再灌注心肌内出血进行成像。

Imaging of reperfused intramyocardial hemorrhage with cardiovascular magnetic resonance susceptibility weighted imaging (SWI).

作者信息

Goldfarb James W, Hasan Usama

机构信息

Department of Research and Education, Saint Francis Hospital, Roslyn, NY, United States of America; Program in Biomedical Engineering, SUNY Stony Brook, Stony Brook, NY, United States of America.

Department of Research and Education, Saint Francis Hospital, Roslyn, NY, United States of America; New York College of Osteopathic Medicine, Old Westbury, NY, United States of America.

出版信息

PLoS One. 2015 Apr 13;10(4):e0123560. doi: 10.1371/journal.pone.0123560. eCollection 2015.

DOI:10.1371/journal.pone.0123560
PMID:25875478
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4395374/
Abstract

PURPOSE

To report initial experience with TE-averaged susceptibility weighted imaging (SWI) in normal subjects and acute myocardial infarction (AMI) patients for the detection of intramyocardial hemorrhage (IMH).

MATERIALS AND METHODS

15 healthy control and 11 AMI subjects were studied at 1.5T before contrast agent administration with a dark blood double inversion recovery multiple spoiled gradient-echo sequence. Magnitude, susceptibility weighted and TE-averaged images were reconstructed from raw data. Contrast and signal-difference-to-noise were measured and compared between methods for IMH detection.

RESULTS

There were six patients with microvascular obstruction (MVO) and four patients with IMH detected by TE-averaged SWI imaging. All patients with IMH on SWI scans had MVO on late gadolinium-enhanced (LGE) imaging. There was a three-fold increase in IMH contrast with SWI compared to magnitude images. IMH contrast decreased and signal-to-noise increased with increased TE averages.

CONCLUSIONS

TE-averaged SWI imaging is a promising method for myocardial tissue characterization in the setting of AMI for the detection of IMH. Along with gray-scale colormap inversion, it combines not only magnitude and phase information, but also images across TEs to provide a single image sensitive to IMH with characteristics similar to LGE imaging.

摘要

目的

报告在正常受试者和急性心肌梗死（AMI）患者中使用TE平均加权磁共振血管造影（SWI）检测心肌内出血（IMH）的初步经验。

材料与方法

对15名健康对照者和11名AMI受试者在1.5T磁场下进行研究，在注射造影剂前采用黑血双反转恢复多扰相梯度回波序列。从原始数据重建幅度、磁敏感加权和TE平均图像。测量并比较用于IMH检测的不同方法之间的对比度和信号差噪比。

结果

通过TE平均SWI成像检测到6例微血管阻塞（MVO）患者和4例IMH患者。SWI扫描显示有IMH的所有患者在延迟钆增强（LGE）成像上均有MVO。与幅度图像相比，SWI的IMH对比度增加了两倍。随着TE平均值的增加，IMH对比度降低，信噪比增加。

结论

TE平均SWI成像是一种在AMI情况下用于心肌组织特征分析以检测IMH的有前景的方法。与灰度彩色图反转一起，它不仅结合了幅度和相位信息，还结合了跨TE的图像，以提供对IMH敏感的单一图像，其特征类似于LGE成像。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/869c/4395374/5f68136f82f5/pone.0123560.g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/869c/4395374/5f68136f82f5/pone.0123560.g011.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/869c/4395374/1763787cdfa6/pone.0123560.g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/869c/4395374/1d26b3697c0a/pone.0123560.g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/869c/4395374/5f68136f82f5/pone.0123560.g011.jpg

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