从临床级的MRI预测到MR协议不可知,无偏见的大脑年龄
Pedro A Valdes-Hernandez1,2,3, Chavier Laffitte Nodarse4,5,6, Julio A Peraza7
1Department of Community Dentistry and Behavioral Science, University of Florida, 1329 SW 16th Street, Ste. 5180, Gainesville, FL, 32610, USA. pvaldeshernandez@dental.ufl.edu.
Scientific reports
|November 10, 2023
概括
这项研究开发了一个大脑年龄估计模型,用于各种临床MRI扫描,而不仅仅是研究级的扫描. 该模型显示了在各种成像类型中作为个性化医疗的可靠生物标志物的潜力.
科学领域:
- 神经成像是一种神经成像.
- 人工智能的人工智能
- 生物标志物开发 生物标志物开发
背景情况:
- 大脑年龄估计,预测和实际年龄之间的差异,显示出临床潜力.
- 现有的大脑年龄模型仅限于高分辨率的研究MRI,阻碍了临床使用.
- 临床MRI的可变性 (模式,分辨率,协议) 对模型的通用性构成了挑战.
研究的目的:
- 开发一种适用于各种临床级MRI数据的大脑年龄估计模型.
- 为了创建一个强大的模型在MRI模式,分辨率和切片方向的变化.
- 解决和纠正对无偏见生物标志物的大脑年龄估计中的回归偏差.
主要方法:
- 使用卷积神经网络 (CNN) 采用双转移学习策略.
- 美国有线电视新闻网 (CNN) 在6281个临床MRI上进行了再培训,涉及7种模式和8种扫描仪模型.
- 合成研究级磁化准备的快速梯度回声MRI (MPRAGEs) 用于训练,并开发了一个偏差模型用于校正.
主要成果:
- 该模型在各种临床MRI模式中实现了5.86-8.59年的平均绝对误差 (MAE).
- 对于一些模式,合成MPRAGEs的性能与实际MPRAGEs相当.
- 偏差校正模型被证明是可概括的,在新样本中消除了与年龄相关的相关性.
- 大脑预测年龄差异 (大脑-PAD) 在不同的模式中显示出可靠性.
结论:
- 从任意的临床级MRI中证明了可行的大脑年龄预测.
- 开发的模型通过可靠的大脑年龄生物标志物,为个性化医学的潜力做出了贡献.
- 该方法解决了先前模型的局限性,扩大了临床适用性.
相关概念视频
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...
Brain Imaging
Brain imaging technologies provide critical insights into both the structure and function of the human brain, enabling medical professionals and researchers to diagnose, study, and treat neurological disorders or psychiatric disorders more effectively.
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).
These technologies include computerized axial tomography (CAT or CT scans), positron-emission tomography (PET scans), magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), and Transcranial Magnetic Stimulation (TMS).


