Abstract: An assembly is provided for seeking an area of interest within a body. The assembly includes an elongated directable member having a distal end for insertion into the body. The distal end includes a tip portion. The assembly also includes a deflector coupled to the directable member for deflecting the distal end of the directable member to direct the directable member within the body. The assembly further includes a sensor located in close proximity to the top portion of the directable member for sensing an area of interest within the body. The sensor generates an indicator signal upon detection of the area of interest. The assembly still further includes a control unit coupled to the deflector for controlling deflection of the distal end of the directable member by the deflector. The control unit generates a control signal to drive the deflector.

Abstract: A flow rate controlled angiographic injection system is provided with an overspeed injection protection means. The injection system includes a motor driven syringe injector and a flow rate controller responsive to the overspeed protection means to drive the motor to inject a contrast medium from the syringe into a blood vessel at a desired flow rate when the actual flow rate from the syringe is less than or equal to the predetermined flow rate, and to disable the motor otherwise. The overspeed injection protection means includes a means for generating a signal representative of the actual flow rate of a contrast medium from the syringe by detecting the back emf induced in the motor armature, compensation being made for the resistive voltage drop in the armature windings and brushes.