Differentiating Breast Tissue Stiffness With Magnetic Resonance Elastography (MRE): A Focus on Fibroglandular and...

Area of Science:

• Biomedical Engineering
• Radiology
• Medical Imaging

Background:

• Breast density is a significant risk factor for breast cancer and impacts mammography sensitivity.
• Magnetic resonance imaging (MRI) is recommended for screening women with increased breast density.
• Mammography is the primary tool for assessing breast density, but its effectiveness can be limited.

Purpose of the Study:

• To evaluate magnetic resonance elastography (MRE) for distinguishing between fibroglandular and fatty breast tissues.
• To assess MRE's potential role in classifying breast density using MRI.
• To investigate MRE's ability to measure tissue stiffness in women with varying mammographic densities.

Main Methods:

• A prospective study included 43 women aged 40-79 with normal screening mammograms.
• MRE was performed using a 1.5-T MRI scanner with a noncontrast-enhanced breast MRI protocol.
• Stiffness values for fibroglandular and fatty tissues were measured using regions of interest (ROIs) in both breasts.

Main Results:

• Fibroglandular tissue demonstrated significantly higher stiffness than fatty tissue in both breasts (p < 0.001).
• No significant differences in tissue stiffness were observed between dense and nondense mammogram groups.
• MRE successfully differentiated breast tissue types based on shear stiffness.

Conclusions:

• MRE can distinguish fibroglandular from fatty breast tissue based on shear stiffness.
• This capability is independent of mammographic density, suggesting a potential role for MRE in breast density classification.
• Further research with larger cohorts, including cancer cases, is warranted to establish MRE's role in breast cancer screening.