Performance of the digital cell morphology analyzer MC-100i in a multicenter study in tertiary hospitals in China

Background: This study investigated the performance of the MC -100i, a pre -commercial digital morphology analyzer utilizing a convolutional neural network algorithm, in a multicentric setting involving up to 11 tertiary hospitals in China. Methods: Blood smears were analyzed by MC -100i, verified by morphologists, and manually differentiated. The classification performance on WBCs and RBCs was evaluated by comparing the classification results using different methods. The PLT and PLT clump counting performance was also assessed. The total assay time including hands-on time was evaluated. Results: The agreements between pre- and post -classification were high for normal WBCs (kappa > 0.96) and lower for overall abnormal WBCs (kappa = 0.90). The post -classification results correlated well with manual differentials for both normal and abnormal WBCs (r > 0.93), except for basophils (r = 0.8480) and atypical lymphocytes (r = 0.8211). The clinical sensitivity and specificity of each RBC abnormality after verification were above 90 % using microscopy reviews as the reference. The PLTs counted by the MC -100i before and after verification correlated well with those measured by the PLT-O mode (r = 0.98). Moreover, PLT clumps were successfully classified by the analyzer in EDTA-dependent pseudothrombocytopenia blood samples. Conclusions: The MC -100i is an accurate and reliable digital cell morphology analyzer, offering another intelligent option for hematology laboratories.