Biopsy probe mechanism having multiple echogenic features

摘要

A biopsy probe mechanism (14) includes an elongate sample receiving member (38) having a longitudinal axis and having a sample receiving notch (52). An elongate sample receiving member and a cutting cannula (40) are movable relative to one another along a longitudinal axis between a first relative position (62) and a second relative position (64). A first echogenic feature (68,70,72) is established on the elongate sample receiving member and a second echogenic feature (74,76,78) is established on the cutting cannula. The first echogenic feature is in longitudinal alignment with the second echogenic feature when the elongate sample receiving member and the cutting cannula are in the first relative position. The first echogenic feature is out of longitudinal alignment with the second echogenic feature when the elongate sample receiving member and the cutting cannula are in the second relative position.