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Tracking the Mammary Architectural Features and Detecting Breast Cancer with Magnetic Resonance Diffusion Tensor Imaging
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High-resolution, three-dimensional diffusion-weighted breast imaging using DESS.

Kristin L Granlund1, Ernesto Staroswiecki1, Marcus T Alley2

  • 1Radiology, Stanford University, Stanford, CA 94305; Electrical Engineering, Stanford University, Stanford, CA 94305.

Magnetic Resonance Imaging
|February 12, 2014
PubMed
Summary
This summary is machine-generated.

The double-echo steady-state (DESS) sequence provides high-resolution breast MRI images with diffusion and T2 weighting. This advanced imaging technique offers improved resolution and reduced distortion for better lesion assessment.

Keywords:
3DBreastDESSDWIDiffusionT2

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Area of Science:

  • Magnetic Resonance Imaging (MRI)
  • Medical Imaging Technology
  • Radiology

Background:

  • Conventional breast MRI sequences can be limited by scan time and image resolution.
  • Diffusion-weighted imaging (DWI) and T2-weighted imaging are crucial for lesion characterization.
  • There is a need for advanced MRI techniques that combine high resolution with both diffusion and T2 weighting.

Purpose of the Study:

  • To evaluate the efficacy of the double-echo steady-state (DESS) sequence for high-resolution breast MRI.
  • To assess the DESS sequence's capability for simultaneous diffusion and T2 weighting.
  • To determine if DESS can improve image quality and lesion assessment in breast imaging.

Main Methods:

  • Phantom studies were conducted to confirm T2 and diffusion weighting of the DESS sequence.
  • Volunteer scans compared DESS images with conventional diffusion-weighted images (DWI) and spoiled gradient-echo images to evaluate distortion.
  • The DESS sequence was integrated into a clinical protocol to assess image quality and lesion contrast in patients.

Main Results:

  • Diffusion weighting in the DESS sequence is adjustable via spoiler gradient area and flip angle.
  • Radiologists reported DESS images exhibited superior resolution and less distortion compared to conventional DWI.
  • Strong correlations were observed between DWI and DESS (R=0.83) and T2-weighted fast spin-echo and DESS (R=0.80) for lesion-to-tissue contrast ratios.

Conclusions:

  • The DESS sequence efficiently acquires high-resolution 3D diffusion- and T2-weighted breast images.
  • The DESS sequence achieves this in reduced scan times, enhancing morphological assessment of lesions.
  • DESS imaging represents a promising advancement for breast MRI, offering improved diagnostic potential.