Evaluation of an Automated Differential Leukocyte Counting System: I. Instrument Description and Reproducibility Studies
Thomas F. Dutcher, John E. Benzel, John J. Egan, Donald J. Hart, Elizabeth A. Christopher · American Journal of Clinical Pathology · 1974
An automated differential counter (Hematrak) is described. The instrument was evaluated in three reproducibility studies, and in each case it performed at least as well as technologists, with no evidence of day-to-day variation in cell recognition.