Figure 7.
Automated RBC counting accuracy of our cell-phone based blood analyzer. (A) Comparison of cell-phone based RBC counting results with the standard test results obtained from Sysmex KN21 for 12 different blood samples. A linear regression of the experimental data (n= 12; red line) with RBC concentrations ranging from ~ 3 × 106/μL to 5.5 × 106/μL demonstrates a good agreement between the two modalities with a correlation coefficient of ~ 0.98. The cell-phone blood analyzer counting provides an absolute counting error of less than 5%. (B) The Bland-Altman analysis results, evaluating the accuracy of the cell-phone blood analyzer for RBC concentration measurements vs. the standard hematology analyzer. The black solid lines show a bias of −2.9×104 cells/μL and the 95% limits of agreement of: ~2.5×105 cells/μL (upper limit) and −3.2×105 cells/μL (lower limit).