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. Author manuscript; available in PMC: 2014 Apr 7.
Published in final edited form as: Lab Chip. 2013 Apr 7;13(7):1282–1288. doi: 10.1039/c3lc41408f

Figure 6.

Figure 6

Automated WBC density measurement accuracy of our cell-phone based blood analyzer. (A) Comparison of cell-phone based WBC counting results with the standard test results obtained from SysmexKN21 for 30 different blood samples. A linear regression of the experimental data (n = 30; red line) with WBC concentrations ranging from ~ 3,000/μL to 12,000/μL demonstrates a good agreement between the two modalities with a correlation coefficient of ~ 0.98. The cell-phone based blood analyzer provides an absolute counting error that is less than 7%. (B) The Bland-Altman analysis results, evaluating the accuracy of the cell-phone blood analyzer for WBC concentration measurements vs. the standard hematology analyzer. The black solid lines show a bias of 230 cells/μL and 95%limits of agreement: 955 cells/μL (upper limit) and −495 cells/μL (lower limit).