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New breast MRI techniques, axially reformatted simultaneous multislice (AR-SMS) and readout-segmented (RS) echo-planar imaging, offer superior image quality and resolution compared to standard spin-echo (SE) echo-planar imaging for detecting breast cancer.

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Area of Science:

  • Medical Imaging
  • Radiology
  • Oncology

Background:

  • Standard spin-echo (SE) echo-planar diffusion-weighted imaging (DWI) for breast cancer detection has limitations in image quality and spatial resolution.
  • Readout-segmented (RS) echo-planar imaging and axially reformatted (AR)-simultaneous multislice (SMS) imaging are proposed as advanced alternatives.

Purpose of the Study:

  • To compare the image resolution and quality of standard SE echo-planar DWI with RS echo-planar and AR-SMS imaging techniques in breast imaging.

Main Methods:

  • A prospective study (2016-2018) evaluated three 5-minute DWI protocols (SE, RS, AR-SMS) at 3.0 T in women undergoing breast MRI.
  • A breast phantom was used for resolution assessment; three radiologists assessed lesion size, apparent diffusion coefficient (ADC) values, and image quality.
  • Image quality was rated on a five-point Likert scale, and data were analyzed using linear mixed-effects models.

Main Results:

  • The smallest feature (1 mm) was detectable only with AR-SMS DWI in the phantom.
  • AR-SMS imaging achieved the highest image quality scores, followed by RS echo-planar imaging, both significantly outperforming SE echo-planar imaging (P < .001).
  • Thirty lesions from 28 women were evaluated, with quantitative and qualitative improvements noted for the advanced techniques.

Conclusions:

  • The AR-SMS DWI protocol demonstrated the highest image quality, followed by RS echo-planar imaging.
  • Both advanced DWI techniques offer significant improvements over standard SE echo-planar imaging for breast MRI applications.
  • These findings support the clinical utility of AR-SMS and RS echo-planar imaging for enhanced breast cancer detection and monitoring.