Medical ultrasonic imaging system with three-state ultrasonic pulse and improved pulse generator
June 30, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMiniature implantable ultrasonic echosonometer Sonar compensation transformer Apparatus for generating ultrasonic oscillation Method and apparatus for transmit beamformer Second harmonic imaging transducers Ultrasonic imaging method and apparatus for generating pulse width modulated waveforms with reduced harmonic response Ultrasound front-end circuit combining the transmitter and automatic transmit/receive switch with agile power level control Transmit/receive ultrasound front end circuit providing automatic transmit/receive switching Patent #: 6074346 InventorsApplicationNo. 607806 filed on 06/30/2000US Classes:600/437UltrasonicExaminersPrimary: Jaworski, Francis J.Assistant: Imam, Ali M. International ClassA61B 008/00AbstractA three-state, pulse width modulated, bipolar waveform is constructed by summing a first component with an inverted, time-shifted version of the first component. By properly selecting the time interval for the time shift of the second component, frequency filtering benefits can be obtained. The three-state waveform is generated by a switched voltage source that provides a low, constant source impedance for all three voltage states.Other References
Field of SearchUltrasonicTissue attenuation or impedance measurement or compensation Anatomic image produced by reflective scanning Electronic array scanning Through-transmission (e.g., time-of-flight) imaging With means for cutting, scarifying, or vibrating (e.g., ultrasonic, etc.) tissue With signal analyzing or mathematical processing Acoustic holography Of signals to pass only echoes from within test body Having plural sonic type transmitter or receiver transducers Switched ACOUSTIC IMAGE CONVERSION With memory means With towing With beam forming, shaping, steering, or scanning Plural transducer array TRANSPONDERS Input circuit for mechanical output from piezoelectric element Input circuit for simultaneous electrical and mechanical output from piezoelectric element | |
