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Related Concept Videos

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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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...
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Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Magnetic Fields01:27

Magnetic Fields

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A moving charge or a current creates a magnetic field in the surrounding space, in addition to its electric field. The magnetic field exerts a force on any other moving charge or current that is present in the field. Like an electric field, the magnetic field is also a vector field. At any position, the direction of the magnetic field is defined as the direction in which the north pole of a compass needle points.
A magnetic field is defined by the force that a charged particle experiences...
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Magnetic Field of a Solenoid01:18

Magnetic Field of a Solenoid

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A solenoid is a conducting wire coated with an insulating material, wound tightly in the form of a helical coil. The magnetic field due to a solenoid is the vector sum of the magnetic fields due to its individual turns. Therefore, for an ideal solenoid, the magnetic field within the solenoid is directly proportional to the number of turns per unit length and the current. Conversely, the magnetic field outside the solenoid is zero.
Consider a solenoid with 100 turns wrapped around a cylinder of...
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Magnetic Field Lines01:19

Magnetic Field Lines

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The representation of magnetic fields by magnetic field lines is very useful in visualizing the strength and direction of the magnetic field. Each of the magnetic field lines forms a closed loop. The field lines emerge from the north pole (N), loop around to the south pole (S), and continue through the bar magnet back to the north pole.
Magnetic field lines follow several hard-and-fast rules:
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Energy In A Magnetic Field01:24

Energy In A Magnetic Field

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If a magnetic field is sustained, there must be a current in a closed circuit or loop, implying some energy has been spent in creating the field. If this energy is not dissipated via the circuit's resistance, it is stored in the field.
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High-resolution Structural Magnetic Resonance Imaging of the Human Subcortex In Vivo and Postmortem
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Visualizing the Human Subcortex Using Ultra-high Field Magnetic Resonance Imaging.

M C Keuken1,2, B R Isaacs3,4, R Trampel5

  • 1Integrative Model-Based Cognitive Neuroscience Research Unit, University of Amsterdam, Postbus 15926, 1001NK, Amsterdam, The Netherlands. m.c.keuken@uva.nl.

Brain Topography
|March 3, 2018
PubMed
Summary
This summary is machine-generated.

Ultra-high field (UHF) magnetic resonance imaging (MRI) offers unprecedented detail for visualizing the human brain. UHF MRI enables detailed visualization of individual subcortical structures, overcoming limitations of traditional atlases.

Keywords:
Magnetic resonance imagingReviewSubcortexUltra-high field

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Area of Science:

  • Neuroimaging
  • Radiology
  • Neuroanatomy

Background:

  • Ultra-high field (UHF) magnetic resonance imaging (MRI) technology has advanced significantly, improving human brain visualization capabilities.
  • Subcortical structures present challenges for neuroimaging due to high inter-subject variability in size and location.

Purpose of the Study:

  • To provide an extensive overview of UHF MRI applications in visualizing the human subcortex.
  • To assess the utility of UHF MRI for both healthy and patient populations.
  • To discuss current limitations and potential solutions for UHF MRI in subcortical visualization.

Main Methods:

  • Review of existing literature on UHF MRI applications for subcortical visualization.
  • Analysis of studies focusing on healthy and patient cohorts.
  • Synthesis of findings regarding the visualization capabilities and limitations of UHF MRI.

Main Results:

  • UHF MRI allows for extraordinary detail in visualizing the human brain.
  • A significant number of subcortical areas can be visualized in individual space using UHF MRI.
  • Despite variability, UHF MRI shows promise for detailed subcortical mapping.

Conclusions:

  • UHF MRI is a powerful tool for detailed visualization of the human subcortex.
  • It offers advantages over traditional atlases for studying individual subcortical anatomy.
  • Further research is needed to address current limitations and optimize UHF MRI for subcortical analysis.