... strictly under the national standards GB 10152-1997 about “B-type Ultrasonic Diagnostic Device” GB 9706.1-2007 about ... -Gray scale: 256 levels;-Cine Loop: 64 frames;-Imaging mode: B, B/B, B/M; -Image invert: horizontally invertible;-Time Gain Compensation (TGC): ... Patient data: name, gender, age, image, cine;-Measurement and calculation: B mode: distance, circumstance, area; M mode: heart rate, time, ...