Co-track ultrasonic image dynamic comparing device

The utility model discloses a co-track ultrasonic image dynamic comparing device which comprises an ultrasonic information acquisition unit, a storage unit and an ultrasonic information replay unit, wherein the ultrasonic information acquisition unit comprises an ultrasonic image acquisition module, a space positioning module, a pressure sensing module, a radio acquisition module, a data compression module and a first communication module; and the ultrasonic information replay unit comprises a second communication module, a data decompression module, a digital signal processor, a display module and a voice play module. According to the co-track ultrasonic image dynamic comparing device, primary ultrasonic examination information is acquired by using the ultrasonic information acquisition unit and stored in the storage unit; when the ultrasonic examination is carried out on the same patient for a second time, the primary ultrasonic examination information is called from the storage unit through the ultrasonic