Abstract: In an ultrasonic tool-guidance system, an imaging module in a housing includes modules for image and beam processing and beamforming. A transmitter and a receiver connect via a switch to a multi-transducer probe. The housing includes a display for providing real-time ultrasound images. The probe includes a tool-guiding channel through which a tool can be inserted into the body of a patient. The transducers are arranged at an angle laterally around the tool-guiding channel. The angled transducers provide overlapping beams that result in a better quality enhanced image of the center area. The probe is rotatably attached to the housing to allow for easy viewing of the ultrasound images during a procedure. The tool-guiding channel is maintained at a fixed angle with respect to the transducers and the probe to assure that the tool remains in the illuminated area throughout the procedure.