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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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Evaluation of malignant effusions using MR-based T1 mapping.

D Kuetting1, J Luetkens2, A Faron2

  • 1Department of Diagnostic and Interventional Radiology, University of Bonn, Venusberg Campus 1, 53105, Bonn, Germany. daniel.kuetting@ukbonn.de.

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|March 30, 2021
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Summary
This summary is machine-generated.

Rapid T1-mapping effectively differentiates malignant from non-malignant effusions ex vivo. This technique shows shorter T1 relaxation times in malignant fluids, aiding diagnosis.

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Area of Science:

  • Medical Imaging
  • Biophysics

Background:

  • Distinguishing malignant from non-malignant effusions is crucial for patient management.
  • Current diagnostic methods can be invasive and time-consuming.

Purpose of the Study:

  • To evaluate the diagnostic performance of rapid T1-mapping for differentiating malignant and non-malignant effusions ex vivo.
  • To compare two T1-mapping techniques: fast modified Look-Locker inversion-recovery (MOLLI) and a combined turbo spin-echo and inversion-recovery sequence (TMIX).

Main Methods:

  • T1-mapping was performed on 13 albumin solutions and 48 patient effusion samples (29 malignant, 19 non-malignant).
  • Samples were histologically classified.
  • Correlation with albumin content and receiver operating characteristic (ROC) analysis were conducted.

Main Results:

  • Both MOLLI and TMIX T1-mapping correlated strongly with albumin content in phantom studies.
  • MOLLI T1 relaxation times were significantly shorter in malignancy-positive effusions (2237 ± 137 ms) compared to malignancy-negative (2423 ± 357 ms) and non-malignant (2651 ± 139 ms) effusions.
  • ROC analysis yielded an area under the curve (AUC) of 0.89 for differentiating malignant from non-malignant effusions.

Conclusions:

  • Rapid T1-mapping, particularly MOLLI, demonstrates significant potential for non-invasively differentiating malignant from non-malignant effusions in an ex vivo setting.
  • This technique offers a promising adjunctive tool for effusion characterization.