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Related Concept Videos

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...
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
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,...
Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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,...
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are slanted or...
Applications Of NMR In Biology01:25

Applications Of NMR In Biology

Nuclear magnetic resonance (NMR) spectroscopy is a very valuable analytical technique for researchers. It has been used for more than 50 years as an analytical tool. F. Bloch and E. Purcell formulated NMR in 1946 and won the 1952 Nobel Prize in Physics  for their work. Biological macromolecules such as proteins, nucleic acids, lipids, and organic molecules including pharmaceutical compounds, can be studied using this versatile tool that exploits the magnetic properties of certain nuclei.
The...

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Updated: May 28, 2026

Standardized Data Acquisition for Neuromelanin-Sensitive Magnetic Resonance Imaging of the Substantia Nigra
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Problems in texture analysis with magnetic resonance imaging.

Lothar R Schad1

  • 1Department of Biophysics and Medical Radiation Physics, German Cancer Research Centre, Heidelberg, Germany.

Dialogues in Clinical Neuroscience
|October 29, 2011
PubMed
Summary
This summary is machine-generated.

Quantitative magnetic resonance imaging (MRI) texture analysis can enhance diagnostic information. Developing standardized texture phantoms is crucial for optimizing MRI data acquisition and ensuring reliable texture analysis across different scanners and protocols.

Keywords:
brainmagnetic resonance imagingtexture analysistrabecular bone

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Area of Science:

  • Medical Imaging
  • Quantitative MRI
  • Texture Analysis

Background:

  • Magnetic Resonance Imaging (MRI) is a vital in vivo diagnostic tool.
  • Clinical variations in MRI acquisition protocols can impact diagnostic information.
  • Optimizing quantitative MRI techniques, particularly texture analysis, is essential for maximizing diagnostic yield.

Purpose of the Study:

  • To discuss advancements in quantitative MRI, focusing on texture analysis.
  • To highlight the importance of optimal MRI data collection strategies for texture analysis.
  • To emphasize the need for standardized texture phantoms for reliable MRI texture assessment.

Main Methods:

  • Investigating the impact of different MRI measuring techniques (spin echo, gradient echo, echo planar) and parameters on texture patterns.
  • Utilizing texture phantoms designed to simulate tissue-like textures and MR relaxation properties.
  • Assessing phantom stability, uniformity, and utility across various MRI sequences and scanners.

Main Results:

  • Different MRI acquisition parameters and techniques significantly alter image texture.
  • Texture phantoms are essential for understanding the relationship between tissue structure and MRI texture.
  • Standardized phantoms are vital for evaluating the reliability and accuracy of MRI texture analysis methods.

Conclusions:

  • Optimizing MRI data acquisition strategies is critical for robust texture analysis.
  • The development and validation of reliable texture phantoms are necessary for advancing quantitative MRI.
  • Standardized texture phantoms will enable consistent and comparable texture analysis across diverse clinical settings.