A focused ultrasonic transducer navigation system attaches to a patient and includes a housing that contains an ultrasonic device. The neck finish includes an inwardly oriented stepped area adjacent the opening. The cylindrical body includes a longitudinal bore therethrough that is sized for passage of a bone drill. 125 seconds in a frequency range from 16 Hz to 4000 Hz, with 11. The structures of bone are useful for providing living cells and tissues as well as biologically active molecules to subjects.