Abstract: The distribution of mechanical properties on subsurface of materials can be obtained with acoustic imaging technique,and so it has been an important research field in ultrasound medicine.In order to increase the spatial resolution of acoustic imaging,some near field imaging techniques,such as photoacoustic imaging,scanning electron acoustic microscopy(SEAM) and scanning probe acoustic microscopy(SPAM),have been developed recently.In this paper the applications of the near field acoustic imaging techniques in ultrasound medicine are introduced briefly with some experimental results.