Vorrichtung und Verfahren zum Steuern der Empfindlichkeit von Wandlern

Apparatus and methods for controlling electrostrictive transducer sensitivity in a pulse-echo medical ultrasound system. Certain characteristics of each transducer element are tested after manufacture and recorded on a storage medium. The stored data is then used, along with certain model relations,...

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Bibliographische Detailangaben
Hauptverfasser:	ADAMS, DARWIN P, GURURAJA, TURUVEKERE R, PRATER, DAVID M, HERRICK, BENJAMIN M
Format:	Patent
Sprache:	ger
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES DEAF-AID SETS DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES DIAGNOSIS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FOR PERFORMING MECHANICAL WORK IN GENERAL GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL HUMAN NECESSITIES HYGIENE IDENTIFICATION LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING MEDICAL OR VETERINARY SCIENCE METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY PERFORMING OPERATIONS PHYSICS PUBLIC ADDRESS SYSTEMS RADIO DIRECTION-FINDING RADIO NAVIGATION SURGERY TESTING TRANSPORTING
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Beschreibung
Zusammenfassung:	Apparatus and methods for controlling electrostrictive transducer sensitivity in a pulse-echo medical ultrasound system. Certain characteristics of each transducer element are tested after manufacture and recorded on a storage medium. The stored data is then used, along with certain model relations, for monitoring certain operational parameters of the transducer during use, and feedback compensation applied for maintaining the transducer sensitivity substantailly constant. The parameters to be monitored may include the temperature, acoustic pressure, input power, and a figure of merit determined from the dielectric constant and coupling coefficient.