Predicting of Ki-67 Expression Level Using Diffusion-Weighted and Synthetic Magnetic Resonance Imaging in Invasive Ductal Breast Cancer

Figure 2

47-year-old female with invasive ductal carcinoma (IDC) of the left breast. Ki-67 expression was 20%. Axial contrast enhanced T1-weighted image (T1WI) showed an irregular homogeneous enhancing mass with circumscribed margin (a) The quantitative parameters were measured on SyMRI-T1WI before ((b) pre-T1 = 1495 ms, pre-T2 = 77 ms, and pre-PD = 80.8 pu) and after ((c) post-T1 = 683 ms, post-T2 = 69 ms, and post-PD = 67.4 pu) administration of the contrast medium. Similar images are shown for the mass on precontrast ((d) T1 mapping, (e) T2 mapping, and (f) PD mapping) and postcontrast ((g) T1 mapping, (h) T2 mapping, and (i) PD mapping) enhanced mapping images. The apparent diffusion coefficient (ADC) value was 0.936 × 10⁻³ mm²/s on the ADC map image (j).

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