Figure 3. Dynamic breast MRI.(a) Sagittal pre-contrast three-dimensional T₁ weighted fast low-angle shot (FLASH) sequence showing a low intensity, oval, well-defined mass (arrow). (b) Axial T₂ weighted fast spin-echo image showing a high intensity mass (arrow). (c) Subtraction of the post-contrast from the pre-contrast image displays a homogeneously enhancing lesion. (d) The signal-to-time curve in this enhanced mass reveals a strong initial signal intensity increase of more than 100% in the first 3 min, followed by a gradual enhancement in the next few minutes (Type 1 curve).