A method and apparatus are disclosed for performing an ultrasound scan on a body part and specifically for a portable instrument which directly attaches to the surface of the body. This apparatus provides very high resolution images and greatly increased depth of imaging for high resolution ultrasound of targeted subsurface body tissues with ultrasound image resolution far superior to that of known state of the art ultrasound instruments. Targeted tissues could include but not be limited to joints, ocular structures, and internal organs.The method and apparatus disclosed are also directed towards providing an ultrasound imaging system that can produce high image resolution (down to about 100 μm) at depths approaching about 50 mm to about 60 mm. The method and apparatus can stabilize and provide accurate determination of the position of the body part relative to the ultrasound probe.