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Magnetic Resonance Imaging

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...

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Updated: Sep 18, 2025

Fat-Water Phantoms for Magnetic Resonance Imaging Validation: A Flexible and Scalable Protocol

Fat-Water Phantoms for Magnetic Resonance Imaging Validation: A Flexible and Scalable Protocol

Published on: September 7, 2018

开源,可定制的幻影用于低场磁共振成像.

Kalina V Jordanova¹, Stephen E Russek², Kathryn E Keenan²

¹Physical Measurement Laboratory, National Institute of Standards and Technology, 325 Broadway, Boulder, CO, 80305, USA. kalinaj@alumni.stanford.edu.

Magma (New York, N.Y.)

|June 25, 2025

概括

一个开源的MRI幻影被设计为低场系统使用可访问的材料. 这种可复制幻影允许轻松修改和验证磁共振成像 (MRI) 扫描.

关键词:

图像成像是一种成像.磁共振成像技术磁共振成像技术幽灵的幽灵幽灵的幽灵结果的可复制性结果的可复制性

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Last Updated: Sep 18, 2025

Fat-Water Phantoms for Magnetic Resonance Imaging Validation: A Flexible and Scalable Protocol

Fat-Water Phantoms for Magnetic Resonance Imaging Validation: A Flexible and Scalable Protocol

Published on: September 7, 2018

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科学领域:

医疗成像医学成像
磁共振成像 (MRI) 是一种磁共振成像.
生物医学工程生物医学工程

背景情况:

开发标准化幻影对于MRI研究至关重要.
对于更广泛的MRI社区,需要可访问和可复制的幻影设计.
低场MRI系统需要特定的幻影特征来进行准确的评估.

研究的目的:

概述设计MRI幻影的关键标准.
开发一个开源的幻影,使用易于获得的材料和制造方法.
为了创建一个由MRI研究人员轻松复制和修改的幻影.

主要方法:

文献审查和先前的经验为幻影设计的考虑提供了信息.
一个开源的幽灵被设计,3D打印,并组装.
获得低场 (64mT) 核磁共振扫描 (T1和T2加权).
评估图像质量指标,包括信号与噪声比 (SNR),对比与噪声比 (CNR) 和几何扭曲.

主要成果:

两个设计代改进了材料选择和形式因素.
在T1和T2加权图像中的幻影样本和背景之间观察到明显的对比.
与T1加权图像相比,T2加权图像显示SNR和CNR增加了8-10倍.
在所有获取的图像中,几何扭曲保持在1像素的距离内.

结论:

一个开源的幻影成功地被创建用于评估低场MRI扫描.
幻影设计可以接受用户修改和定制.
幻影通过用户设计的插件促进了各种MRI相关测量的验证.