An apparatus and method of automated
blood cell analysis uses technologies from other systems to create a new, robust, improved type of automated
microscope, which uses electronic motors and a
closed loop control system to minimize ambient factors, such as jarring and temperature changes. Pre-stained
blood smear slides are first coated with a thin film of oil and are loaded into a carousel from which they can individually be analyzed. The slides are moved under a low
magnification microscope; an optimal area of examination is determined; a focal
plane map is calculated for that area, and the positions of
white blood cell candidates are computed. The slide is then moved under a high power
microscope where a refined focal
plane map is computed and the individual
white blood cell candidates are imaged. The cells are preclassified and the images are made available for analysis by the
technician. Additionally, samples of red blood cells, equivalent to what the
technician would do manually, are imaged and presented to the
technician for evaluation. The technician may make notes on those cells, both red and white blood cells and archive them.