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相关概念视频

Magnetic Resonance Imaging01:24

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...
Imaging Studies for Cardiovascular System IV: CMRI01:21

Imaging 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,...
Brain Imaging01:14

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).
Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...

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相关实验视频

Updated: Jul 4, 2026

High-resolution Functional Magnetic Resonance Imaging Methods for Human Midbrain
10:06

High-resolution Functional Magnetic Resonance Imaging Methods for Human Midbrain

Published on: May 10, 2012

我们可以用fMRI做什么,不能做什么.

Nikos K Logothetis1

  • 1Max Planck Institute for Biological Cybernetics, 72076 Tuebingen, Germany, and Imaging Science and Biomedical Engineering, University of Manchester, Manchester M13 9PL, UK. nikos.logothetis@tuebingen.mpg.de

Nature
|June 13, 2008
PubMed
概括

功能磁共振成像 (fMRI) 推进了大脑研究,但解释挑战仍然存在. 了解血液动力学信号和fMRI限制对于准确的神经成像数据分析至关重要.

科学领域:

  • 认知神经科学 认知神经科学
  • 神经成像是一种神经成像.

背景情况:

  • 功能磁共振成像 (fMRI) 是认知神经科学中的主要神经成像技术.
  • 当前技术和方法的进步旨在增强fMRI的能力,超出基本的大脑绘图.

研究的目的:

  • 为提供fMRI当前状态的概述.
  • 根据方法学的局限性,讨论fMRI数据的解释.

主要方法:

  • 对神经成像和生理数据的审查.
  • 血液动力学信号及其约束的分析.

主要成果:

  • fMRI数据的解释往往是由于缺乏对潜在生理信号的理解而受到限制.
  • 血液动力学反应引入了限制,必须考虑准确的结论.

结论:

  • 尽管技术进步,但关于fMRI数据的解释仍然存在根本问题.
  • 对血液动力学信号的更深入的理解对于推动fMRI从大脑映射到研究大脑组织至关重要.

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Last Updated: Jul 4, 2026

High-resolution Functional Magnetic Resonance Imaging Methods for Human Midbrain
10:06

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Published on: May 10, 2012

fMRI Validation of fNIRS Measurements During a Naturalistic Task
10:36

fMRI Validation of fNIRS Measurements During a Naturalistic Task

Published on: June 15, 2015

Transferring Cognitive Tasks Between Brain Imaging Modalities: Implications for Task Design and Results Interpretation in fMRI Studies
10:09

Transferring Cognitive Tasks Between Brain Imaging Modalities: Implications for Task Design and Results Interpretation in fMRI Studies

Published on: September 22, 2014