Small Lesions Evaluation Based on Unsupervised Cluster Analysis of Signal-Intensity Time Courses in Dynamic Breast MRI

Figure 4

Variance of the minimal and maximal percentage of the initial signal increase 𝑠𝑎_𝑖 for 20 runs in function of the initial steps size 𝛼 varied from 0.1 to 1. As an optimal value, we obtain 𝛼=0.3.