Fig. 1

Malignant mass detected in a 47-year-old patient undergoing MRI to evaluate newly diagnosed cancer. a DCE post-contrast subtraction image demonstrates an additional 20-mm round mass with irregular margins in the posterior right breast 6 o’clock (arrow), assigned a BI-RADS category 4. DTI-derived parametric maps of b apparent diffusion coefficient (ADC), c fractional anisotropy, and eigenvalues d λ₁, e λ₂, and f λ₃ are shown for the lesion regions overlaid in color on the b = 800 s/mm² image. ADC, λ₁, λ₂, and λ₃ are in units of 10⁻³ (mm²/s). The mass demonstrated low ADC (mean ADC = 1.09 × 10⁻³ mm²/s) with FA = 0.18, λ₁ = 1.27 × 10⁻³ mm²/s, λ₂ = 1.11 × 10⁻³ mm²/s, and λ₃ = 0.87 × 10⁻³ mm²/s. Biopsy revealed a malignant grade 1 invasive ductal carcinoma