MD4400: L/C Probe, 2Socket, 128 Elements, 14inch Monitor L= Linear. C= Convex Features Scientific matchingScientific matching to avoid waste of ultrasound energy effectively, improve detecting performance of probe greatly and assure the definition of image. CDA & CDF Adopt CDA & CDF to improve distinguishing rate of image and detecting depth. 2 Degree Image Process Pretreatment: Dynamic wave-filter, Gain compensation and adjustment.Postprocessing treatment: The speed of scan, correlative frame, Y Parameter, correlative line and choice of window curve.