下降的个体:探索休息状态功能性MRI指纹的时间分辨率的影响
Barbara Cassone1,2, Francesca Saviola1,3, Stefano Tambalo1,4,5
1CIMeC, Center for Mind/Brain Sciences, University of Trento, Rovereto, Trento, Italy.
Human brain mapping
|January 31, 2025
概括
使用静止状态fMRI (rs-fMRI) 的功能性大脑指纹识别在不同的时间分辨率中可靠. 关联性大脑区域始终有助于主体识别,而感官运动区域在整合来自不同分辨率的数据时变得更有影响力.
科学领域:
- 神经成像是一种神经成像.
- 认知神经科学 认知神经科学
- 生物标志物发现发现
背景情况:
- 功能性大脑指纹量化神经成像可靠性,并识别认知生物标志物.
- 大脑指纹与特定大脑区域的特定时间尺度的功能连接有关.
- 时间分辨率对功能指纹可靠性的影响尚不清楚.
研究的目的:
- 在各种时间分辨率 (TRs) 上使用静止状态fMRI (rs-fMRI) 调查功能指纹的可靠性.
- 为了确定不同时间分辨率对主体识别能力的影响.
- 确定大脑区域和网络,这些区域和网络对在不同TR中对象的识别能力有最大的贡献.
主要方法:
- 从20名健康志愿者获得了rs-fMRI数据,全脑时间分辨率为0.5,0.7,1,2和3秒.
- 在每个固定的TR中评估了对象的识别能力.
- 分析了特定功能连接和大脑网络对可识别性的贡献.
主要成果:
- 在所有测试的TR中,对象识别成功,最高分数为0.5s (64%) 和3s (56%).
- 关联性大脑区域始终为主体识别做出了更大的贡献,无论TR.
- 感官运动区域在整合不同TRs的数据时获得了影响力,特别是在像前额头和背侧注意力网络这样的网络中.
结论:
- 来自rs-fMRI的功能连接指纹在不同的时间分辨率上是强大的,显示了多中心研究的潜力.
- 必须考虑fMRI信号采样率的差异,以提高指纹结果的可靠性和通用性.
- 这些发现有助于更好地理解功能连接指纹的实际应用以及对未来神经成像研究的影响.
相关概念视频
01:24Magnetic 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...
01:21Imaging Studies for Cardiovascular System IV: CMRI
Cardiovascular magnetic resonance imaging, or CMRI, is a non-invasive diagnostic test that employs a magnetic field and radiofrequency waves to create precise images of the heart and arteries. It provides comprehensive information about cardiac anatomy, function, perfusion, and tissue characterization without ionizing radiation.IndicationsCMRI diagnoses various heart conditions, including tissue damage from heart attacks, ischemic heart disease, myocarditis, aortic issues (tears, aneurysms,...