
Quantitative susceptibility mapping - Wikipedia
QSM utilizes phase images, solves the magnetic field to susceptibility source inverse problem, and generates a three-dimensional susceptibility distribution.
定量磁化率成像(QSM) - 知乎专栏
磁化敏感性描述了材料对所施加磁场的磁化率,并代表了MRI领域的重要参数。借助最近引入的定量磁化强度映射(quantitative susceptibility mapping,QSM)方法及其在概念上扩展到磁化张量成像(susceptibility tenso…
Phenotypic and genetic associations of quantitative magnetic ...
2022年5月23日 · Quantitative susceptibility mapping (QSM) is an emerging magnetic resonance imaging technique that measures tissue magnetic susceptibility and has been shown to detect...
磁敏感定量成像技术的基本方法和临床应用_qsm-CSDN博客
2022年6月10日 · 本文概述了磁敏感定量成像 (QSM)技术,一种用于精确定量磁化率的先进MRI技术。 QSM在识别大脑铁沉积、区分钙化和出血、神经退行性疾病诊断中展现价值,尤其在高级别胶质瘤和帕金森病等领域。 文章介绍了QSM的原理、重建方法,以及其在临床实践中的应用和未来扩展潜力。 磁敏感定量 成像 (Quantitative susceptibility mapping, QSM)是磁共振成像评价磁化率的一种先进技术,可以精确定量地测量磁化率的空间分布。 磁化率描述了材料对外加磁场 …
Quantitative Susceptibility Mapping: Basic Methods and Clinical ...
2022年5月6日 · Quantitative susceptibility mapping (QSM), one of the advanced MRI techniques for evaluating magnetic susceptibility, offers precise quantitative measurements of spatial distributions of magnetic susceptibility. Magnetic susceptibility describes the magnetizability of a material to an applied magnetic field and is a substance-specific value.
Quantitative Susceptibility Mapping (QSM) - Questions and …
Quantitative Susceptibility Mapping (QSM) comprises a group of largely experimental methods by which the absolute concentrations of iron, calcium and other substances may be measured in tissues based on changes in local susceptibility.
定量磁敏感成像(QSM)数据处理教程 - 知乎 - 知乎专栏
2021年4月11日 · 1)本章节以PPT的形式分享基于开源软件STISuite的QSM数据后处理教程,计算得到QSM图谱。 在生成的图像上,基于ITK-SNAP,勾画ROI就可以测量数值(后续分享ITK-SNAP勾画ROI的文章)。
A subject-specific unsupervised deep learning method for …
2024年7月1日 · Quantitative susceptibility mapping (QSM) is an MRI-based technique that estimates the underlying tissue magnetic susceptibility based on phase signal. Deep learning (DL)-based methods have shown promise in handling the challenging ill-posed inverse problem for QSM reconstruction.
三维多回波流动补偿定量磁化率成像 (QSM)方法研究
2015年3月6日 · 摘要:定量磁化率成像 (QSM)利用一般成像技术舍弃的相位信息得到局部磁场变化特性,通过复杂的场到源反演计算,可直接得到定量的磁化率图,它广泛应用于测量血氧饱和度、脑部微出血、铁沉积、组织钙化等方面.然而,梯度磁场中流动会引起相位错误,并且产生显著的流动伪影,最终得到错误的QSM图像.为了矫正流动的影响,该文在3 T磁共振系统上实现了三维多回波流动补偿梯度回波序列,并用该序列采集流动水模和志愿者颅脑数据.流动水模和颅脑 …
Learning-based single-step quantitative susceptibility mapping ...
2019年11月15日 · QSM computes the susceptibility from the phase signal of gradient-recalled echoes (GRE) and typically requires several processing steps. These steps involve phase unwrapping, tissue volume (e.g., brain) extraction, background phase removal and solving an inverse problem relating the tissue phase to the underlying susceptibility distribution.
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