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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...

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Tracking the Mammary Architectural Features and Detecting Breast Cancer with Magnetic Resonance Diffusion Tensor Imaging
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Dynamic breast MRI: does lower temporal resolution negatively affect clinical kinetic analysis?

Robert L Gutierrez1, Roberta M Strigel, Savannah C Partridge

  • 1Department of Radiology, Group Health, Tacoma Medical Center, Tacoma, WA 98405, USA. gutierrez.rl@ghc.org

AJR. American Journal of Roentgenology
|August 24, 2012
PubMed
Summary

A 180-second temporal resolution in breast MRI captures higher initial peak enhancement for benign and invasive cancers. This method offers better spatial resolution without losing crucial delayed-phase kinetic information for lesion assessment.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Oncology

Background:

  • Breast MRI lesion characterization relies on kinetic analysis.
  • Temporal resolution impacts the accuracy of kinetic assessments.
  • Comparing different temporal resolutions is crucial for optimizing breast MRI protocols.

Purpose of the Study:

  • To compare kinetic assessments of breast MRI lesions using higher (90-second) and lower (180-second) temporal resolutions.
  • To evaluate the impact of temporal resolution on the detection and characterization of benign and malignant breast lesions.

Main Methods:

  • Retrospective analysis of 993 pathologically confirmed breast lesions (BI-RADS 4, 5, 6).
  • Comparison of MRI data acquired with 90-second and 180-second temporal resolution dynamic contrast-enhanced protocols.
  • Analysis of initial-phase peak enhancement and delayed-phase kinetics using a computer-aided evaluation system.

Main Results:

  • The 180-second protocol showed significantly higher peak enhancement for benign lesions (p=0.01) and invasive cancers (p=0.0008).
  • Peak enhancement for ductal carcinoma in situ (DCIS) was similar between protocols (p=0.88).
  • Delayed-phase kinetics (predominant and worst curve type) were comparable across both temporal resolutions for all lesion types.

Conclusions:

  • A 180-second acquisition, despite lower temporal resolution, is preferable for breast MRI.
  • This protocol allows for higher spatial resolution and improved initial-phase peak enhancement capture.
  • Delayed-phase kinetic information is preserved, ensuring comprehensive lesion assessment.