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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...
Radiological Investigation II: MRI and Ventilation Perfusion Scan01:30

Radiological Investigation II: MRI and Ventilation Perfusion Scan

Description
Magnetic Resonance Imaging (MRI) and Ventilation Perfusion Scans are two radiological investigations that offer detailed diagnostic images of the body, particularly lung structures.
MRI
MRI uses magnetic fields and radiofrequency signals to distinguish between normal and abnormal tissues. This technology provides a more detailed diagnostic image than CT scans, enabling it to characterize pulmonary nodules, stage bronchogenic carcinoma, and evaluate inflammatory activity in...

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Updated: Jun 22, 2026

Quantitative Magnetic Resonance Imaging of Skeletal Muscle Disease
09:30

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Published on: December 18, 2016

On MRI turbulence quantification.

Petter Dyverfeldt1, Roland Gårdhagen, Andreas Sigfridsson

  • 1Division of Cardiovascular Medicine, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden. petter.dyverfeldt@liu.se

Magnetic Resonance Imaging
|June 16, 2009
PubMed
Summary
This summary is machine-generated.

Magnetic resonance imaging (MRI) can quantify turbulent flow, crucial for cardiovascular disease research. Proper parameter selection minimizes noise and errors, ensuring accurate turbulence measurements in various applications.

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Area of Science:

  • Biomedical Engineering
  • Medical Imaging
  • Fluid Dynamics

Background:

  • Turbulent flow is linked to cardiovascular diseases and their hemodynamic effects.
  • Magnetic resonance imaging (MRI) is increasingly used to study turbulence.
  • Quantitative MRI turbulence measurements show promise for clinical and engineering applications.

Purpose of the Study:

  • To investigate potential errors and pitfalls in MRI-based turbulence measurements.
  • To outline optimal data acquisition strategies for accurate turbulence quantification.
  • To assess the impact of noise and acquisition parameters on measurement reliability.

Main Methods:

  • Theoretical analysis of MRI signal behavior under turbulent flow conditions.
  • Numerical simulations to evaluate error sources and data acquisition strategies.
  • Investigation of the influence of intravoxel velocity variations and noise.

Main Results:

  • MRI turbulence measurements are largely insensitive to intravoxel mean velocity variations.
  • Measurement noise can significantly degrade turbulence estimates if parameters are set incorrectly.
  • Scan time allocation strategies impact the dynamic range and uncertainty of turbulence quantification.

Conclusions:

  • Careful selection of turbulence encoding parameters is crucial for accurate MRI measurements.
  • Optimized data acquisition strategies can improve the reliability of in vitro and in vivo turbulence quantification.
  • This work provides valuable insights for researchers using MRI for turbulence analysis in cardiovascular and engineering flows.