A method and an apparatus for three-dimensional ultrasound imaging of a needle-like instrument, such as a biopsy needle, inserted in a human body. The instrument is visualized by transmitting ultrasound beams toward the instrument and then detecting the echo signals using a linear array of transducer...http://www.google.de/patents/US6048312?utm_source=gb-gplus-sharePatent US6048312 - Method and apparatus for three-dimensional ultrasound imaging of biopsy needle
