“…Employing the principle of interferometric imaging, QPI measures the phase retardation induced by a sample, from which 2D phase delay maps or 3D refractive index (RI) tomograms of the sample can be retrieved. Due to its non-destructive, label-free, and quantitative imaging capability [3], QPI has been widely used for study in various biological and medical fields, including hematology [4,5], immunology [6], neuroscience [7][8][9], cell biology [10,11], microbiology [12], histopathology [13,14], and nanotechnology [15][16][17].…”