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Related Concept Videos

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 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 the Centromedian Thalamic Nucleus Using Quantitative Susceptibility Mapping.

Jun Li1, Yufei Li2, Lorenzo Gutierrez2

  • 1Department of Functional Neurosurgery, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.

Frontiers in Human Neuroscience
|January 31, 2020
PubMed
Summary
This summary is machine-generated.

Quantitative susceptibility mapping (QSM) significantly improves visualization of the centromedian (CM) nucleus, a key target for deep brain stimulation (DBS). This technique enhances CM imaging, aiding surgical targeting for neurological and psychiatric disorders.

Keywords:
centromedian nucleusdeep brain stimulationdirect targetinggradient recalled echoquantitative susceptibility mapping

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Area of Science:

  • Neuroimaging
  • Neurosurgery
  • Radiology

Background:

  • The centromedian (CM) nucleus, an intralaminar thalamic nucleus, is a potential target for deep brain stimulation (DBS) and ablative surgeries.
  • Standard MRI sequences (T1w and T2w) fail to visualize the CM nucleus, limiting its direct application in clinical targeting for neurological and psychiatric disorders.

Purpose of the Study:

  • To demonstrate the utility of quantitative susceptibility mapping (QSM) for imaging the CM nucleus within the thalamus.
  • To evaluate QSM's effectiveness in visualizing the CM nucleus compared to conventional MRI sequences for surgical targeting.

Main Methods:

  • Acquisition of 3D multi-echo gradient recalled echo (GRE) sequences alongside T1w and T2w images on a 3-T MR scanner.
  • Reconstruction of QSM images from GRE phase data.
  • Visual inspection and quantitative comparison (contrast-to-noise ratio, CNR) of CM visualization on T1w, T2w, and QSM images in 12 patients.

Main Results:

  • QSM significantly enhanced the visualization of the CM nucleus, providing clear delineation against surrounding thalamic structures.
  • T1w and T2w images did not show clear CM visualization.
  • Statistical analysis revealed a significantly higher CNR for CM on QSM compared to T1w and T2w images.

Conclusions:

  • QSM is a promising neuroimaging technique for improving the visualization of the CM nucleus.
  • Enhanced CM visualization via QSM can facilitate direct targeting for deep brain stimulation (DBS) surgery.