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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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関連する実験動画

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

fMRIでできることとできないこと

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
まとめ

機能性磁気共鳴画像 (fMRI) は脳の研究を進めていますが,解釈の課題は残っています. ヘモダイナミック信号とfMRIの限界を理解することは,正確な神経画像データ分析に不可欠です.

科学分野:

  • 認知神経科学とは
  • 神経画像は,神経イメージングによるものです.

背景:

  • 機能性磁気共鳴画像 (fMRI) は,認知神経科学における主要な神経画像技術である.
  • 現在の技術と方法の進歩は,基本的な脳マッピングを超えてfMRIの能力を強化することを目的としています.

研究 の 目的:

  • fMRIの現在の状態の概要を提供するために.
  • 方法論的な限界を踏まえ,fMRIデータの解釈について議論する.

主な方法:

  • 神経画像と生理学的データのレビュー.
  • ヘモダイナミック信号とその制約の分析.

主要な成果:

  • fMRIデータの解釈は,基礎となる生理学的信号の理解の欠如によってしばしば制限されます.
  • 血液動力学的反応は,正確な結論のために考慮しなければならない制約を導入します.

結論:

  • 技術の進歩にもかかわらず,fMRIデータの解釈に関する根本的な疑問が残っています.
  • ヘモダイナミック信号のより深い理解は,脳マッピングから脳組織の研究へのfMRIの進歩に不可欠です.

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Last Updated: Jul 4, 2026

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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