Abstract:
The invention relates to a device comprising two table-like supporting plates, which serve as operating and functional units. The supporting plates each have a longitudinal and transversal extension, are arranged parallel to one another in a frame that can be immobilized in a fixed manner, and are each mounted so that they can spatially move with three-dimensional degrees of freedom that are independent of one another. In addition, a motor-operated drive is provided that can set the supporting plates in oscillatory motion at least in a one-dimensional direction and independent of one another.
Abstract:
There is provided an ultrasonic probe including a plurality of ultrasonic transducers (11), a flexible printed wiring board (17) including a plurality of first wiring portions, on the upper surface of a base member (170), each of which has a width smaller than the width of each ultrasonic transducer in the array direction, and a lining layer (14) provided on the second surface of the base member (170). In a cutting step for ultrasonic transducers (11), cutting is performed such that a blade passes through between the adjacent first wiring portions, and the lining layer (14) is cut halfway.
Abstract:
For the purpose of reducing the size and power consumption of a power source in an ultrasonic diagnostic apparatus, charge pump circuits (50 and 60) are connected to a transmitter power source (14). A regulator in the transmitter power source (14) drives the charge pump circuit (50) to generate a positive bias voltage +HV2 higher than a positive voltage +HV1 generated by the transmitter power source (14). The regulator in the transmitter power source (14) also drives the charge pump circuit (60) to generate a negative bias voltage -HV2 lower than a negative voltage -HV1 generated by the transmitter power source (14).
Abstract:
For the purpose of reducing the size and power consumption of a power source in an ultrasonic diagnostic apparatus, charge pump circuits (50 and 60) are connected to a transmitter power source (14). A regulator in the transmitter power source (14) drives the charge pump circuit (50) to generate a positive bias voltage +HV2 higher than a positive voltage +HV1 generated by the transmitter power source (14). The regulator in the transmitter power source (14) also drives the charge pump circuit (60) to generate a negative bias voltage -HV2 lower than a negative voltage -HV1 generated by the transmitter power source (14).
Abstract:
An ultrasonic surgical system utilizes a digital control system to generate ultrasonic drive current for transducers (36) that are located in a hand piece (30) and are attached to a surgical scalpel or blade (32) in the hand piece so as to vibrate the blade in response to the current. The digital control includes a digital signal processor (DSP) or microprocessor (60); a direct digital synthesis (DDS) device; a phase detection logic scheme, a control algorithm for seeking and maintaining resonance frequency; and design scheme that allows to regulate current, voltage, and power delivered to an ultrasonic thereby a device. Such system allows the power versus load output curve to be tailored to a specific hand piece, which improves efficiency and reduces heat. Further, the components of the digital system are much less sensitive to temperature variations, thereby allowing it to operate with narrow as needed frequency range around the desired resonance in order to avoid excitation of other resonances. Also, the digital system provides increased flexibility in locating the resonance frequency of the blade and running diagnostic tests. The start of a user initiated diagnostic test that requires movement of the blade is caused by operating two of the system switches, which guards against accidental operation of the blade which could be harmful if in contact with tissue and also generate false diagnostic results. In addition, the system has interlock with an Electrosurgical unit so that it is not effected by the electromagnetic interference generated by that unit.
Abstract:
An ultrasound catheter is disclosed for providing substantially real-time images of small cavities. The ultrasound catheter is characterized by separate and distinct materials for backing the transducers and for carrying the electronics components. The separate materials comprise an electronics carrier meeting the requirements for holding the integrated circuitry of the ultrasound device and a backing material displaying superior characteristics relating to reducing ringing and minimizing the effect of other sources of signal degradation in the transducer assembly. Also, in accordance with the present invention, a technique is described for connecting the conductor lines of the separate transducer assembly and electronics body.
Abstract:
An ultrasound catheter (10) is disclosed for providing substantially real-time images of small cavities. The ultrasound catheter (10) is characterized by separate and distinct materials for backing the transducers (22) and for carrying the electronics components (18). The separate materials comprise an electronics carrier (20) meeting the requirements for holding the integrated circuitry (18) of the ultrasound device and a backing material (24) displaying superior characteristics relating to reducing ringing and minimizing the effect of other sources of signal degradation in the transducer assembly. Also, in accordance with the present invention, a technique is described for connecting the conductor lines of the separate transducer assembly and electronics body.
Abstract:
L'invention concerne un instrument de façonnage par ultrasons comportant:
une armature (10), une sonotrode (14) montée élastiquement sur l'armature (10), un outil (16) fixé à la sonotrode (14) pour effectuer les opérations de façonnage, et un organe de commande (12) pour commander et alimenter la sonotrode (14).
L'instrument est dimensionné de manière à ce que l'ensemble formé de la sonotrode (14) et de l'outil (16) présente une fréquence ultrasonore fo de résonance, dans un mode choisi parmi la traction-compression et la torsion, susceptible de varier entre une limite inférieure fomin et une limite supérieure fomax, et qu'il ne présente pas, lui-même, d'autre fréquence de résonance dans une plage comprise entre une fréquence fpmin et une fréquence fpmax > fomax.
Abstract:
A double-sided flexible circuit (22) is used to provide interconnection to a piezoelectric ultrasonic transducer array. The ultrasonic crystal (12) is covered with first and second electrode layers (8, 20) having an insulation gap (6, 17) provided therebetween. The flexible circuit material (22) is then bonded to the first and second electrode layers (18, 20) so that one side of the double sided flexible circuit (8) makes contact to one set of transducer electrodes (18) and the other side of the flexible circuit (28) makes contact to the second set of transducer electrodes (20). The ultrasonic transducer desirably includes a concave acoustic lens (34) having an acoustic velocity greater than water.
Abstract:
The start up performance of an ultrasonic system under zero load conditions is improved by setting a phase set point in a frequency control loop such that, at start up under zero load conditions, the phase set point intersects a point on a phase-frequency response curve which has a low positive slope. This intersection point on the phase-frequency response curve changes as the load is increased and the system Q is decreased. The controller "seeks" a target 0° impedance phase angle. The frequency of the ultrasonic generator is set to an off-resonance frequency which is lower than the resonance of any known hand piece/blade combination. In order for the drive voltage to not exceed the physical limit of the system, the drive current is set to a low level. The drive frequency is then smoothly increased in steps until the target 0° impedance phase delta is located.