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通过使用多TE IMPULSED MRI 来联合估计分区特异的T₂放松和瘤微结构

Xiaoyu Jiang^1,2, Kevin D Harkins^1,2, Jingping Xie¹

¹Vanderbilt University Institute of Imaging Science, Vanderbilt University Medical Center, Nashville, Tennessee, USA.

Magnetic resonance in medicine

|August 20, 2024

概括

在低密度瘤中,T2异质性可能会偏向MRI衍生的细胞大小测量. 一种新的T2+IMPULSED方法同时估计T2和微观结构参数,提高癌症成像的准确性.

科学领域:

生物医学成像技术生物医学成像技术
磁共振成像技术磁共振成像技术
癌症研究癌症研究

背景情况:

磁共振成像 (MRI) 对于非侵入性癌症诊断和监测至关重要.
冲动式MRI技术可以估计组织的微观结构,但T2放松效应可以引入偏差.
了解T2异质性对于准确估计瘤中的微观结构参数至关重要.

研究的目的:

评估T2异质性对实体瘤IMPULSED衍生微结构指标的影响.
评估一种用于同时估计多分区T2和微观结构参数的新方法.

主要方法:

在五种瘤模型中使用计算机模拟和体内多回声 (TE) 脉冲式MRI.
开发了一种T2+IMPULSED方法,用于同时安装T2和微观结构参数.
贝叶斯模型选择被运用了voxel-wise来评估是否需要包括T2异质性.

主要成果:

在高密度组织中,T2异质性对细胞大小 (d) 估计的影响最小,但在低密度组织中显著偏差.
大多数IMPULSED指标是TE独立的,但一些在特定瘤模型中显示了较长的TE显著增加.
与标准方法相比,T2+IMPULSED方法总是产生较小的细胞内体积分数.

结论:

回声时间 (TE) 对IMPULSED衍生的细胞大小估计的影响微不足道.
细胞内体积分的TE-依赖性对于T2+IMPULSED建模精度至关重要.
这些发现推进了非侵入性MRI技术,用于精确测量癌症细胞大小.

关键词:

这是一种冲动式的冲动.在MET2中,MET2是MET2.核磁共振成像细胞测量 T2放松放松的过程癌症癌症癌症癌症癌症扩散扩散是一种扩散.振荡梯度的梯度是振荡的梯度.

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相关概念视频

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...