... keyboard·18 inch large LCD and touch screenSpecification: -Monitor: 18.5 inch touch LCD screen -Angle scanning: ... Image processing: Pre-processing, after-processing, dynamic range, frame rate, line average, edge; enhancement, Black/White inversion; Gray ... , volume, angle, ratio, stenosis, profile, histogram; M mode: heart rate, time, distance, slope and stenosis; Gynecology measurement: Uterus, cervix, ...