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Related Concept Videos

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...
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...

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Modeling Brain Metastases Through Intracranial Injection and Magnetic Resonance Imaging
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Advanced imaging techniques in brain tumors.

Meng Law1

  • 1USC Medical Center and LA County Hospitals, Keck School of Medicine, 1500 San Pablo Street, Los Angeles, CA 90033, USA. meng.law@usc.edu

Cancer Imaging : the Official Publication of the International Cancer Imaging Society
|December 8, 2009
PubMed
Summary
This summary is machine-generated.

Magnetic resonance spectroscopy (MRS) and dynamic susceptibility contrast (DSC) perfusion imaging offer valuable clinical insights but have limitations. Combining these advanced MRI techniques in a multi-parametric approach enhances diagnostic accuracy and confidence.

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Area of Science:

  • Radiology and Medical Imaging
  • Neuroimaging
  • Biomedical Engineering

Background:

  • Perfusion, permeability, and magnetic resonance spectroscopy (MRS) are established research and clinical tools.
  • Current clinical applications involve qualitative, semi-quantitative, and quantitative analysis of imaging data.
  • Existing methods face challenges, including low sensitivity in MRS metabolite ratios and artifacts in DSC perfusion imaging.

Purpose of the Study:

  • To review the limitations of current perfusion, permeability, and MRS techniques in clinical practice.
  • To discuss potential solutions for identified shortcomings, such as leakage correction in DSC imaging.
  • To highlight the benefits of integrating multiple imaging parameters for improved diagnostic performance.

Main Methods:

  • Review of existing literature on perfusion, permeability, and MRS techniques.
  • Analysis of common pitfalls and limitations in qualitative, semi-quantitative, and quantitative approaches.
  • Discussion of correction and normalization strategies for dynamic susceptibility contrast (DSC) magnetic resonance (MR) perfusion imaging.

Main Results:

  • Identified limitations include the low sensitivity of metabolite ratios in MRS.
  • Leakage effects can alter the appearance of color-coded maps in DSC MR perfusion imaging.
  • Correction and normalization methods can mitigate some of these imaging artifacts.

Conclusions:

  • Integrating diverse imaging techniques like MRS and DSC perfusion into a multi-parametric algorithmic approach is crucial.
  • This combined strategy significantly enhances diagnostic specificity and confidence in clinical settings.
  • Addressing the inherent limitations of individual techniques is key to maximizing their clinical utility.