Method for determination of the direction of introduction and for controlling the introduction path of biopsy needles

摘要

With a method for determination of the direction of introduction (4) and for controlling the introduction path of biopsy needles, probes and similar in organisms (2) by using an ultrasound imaging machine, a scanning unit (1) of the ultrasound is placed onto the introduction range of the organism (2) in order to display an image (3a) according to a sectional plane (3) in which or along which the directional axis (4) of the introduction path runs and the biopsy needle or similar is controlled during its actual introduction in the corresponding image display (3a, 6). ;For improvement of the accuracy of introduction and for an easier procedure a larger volume range (3) of the organism (2) is scanned by using a 3D-imaging and with a contingent interim storage of the derived signals by a volume storage the sectional plane (3a) to be displayed is selected according to predeterminable criteria from the volume (3), after which selection the intended introduction path (4) is virtually displayed in this image and an e.g. prismatic or cylindrical part of the total volume is selected especially within predeterminable limits (5) being parallel to the axis of the introduction path within that image (3a), the partial volume being displayed in a 3D-image (6), in which the biopsy needle or similar can be observed during its later actual introduction.