Acuson Corporation

Cordance Medical Inc.

Daniel E Need

Bhaskar S Ramamurthy

Stuart L Carp

Stirling S Dodd

Charles E Bradley

David J Hedberg

Samuel H Maslak

Danhua Zhao

Ken Sawatari

Samual H Maslak

John Alexander Hossack

Kutay F Ustuner

Sean Murphy

John Douglas Marshall

Mallika Keralapura

David M Hedberg

Jonathan B Hofius

An ultrasound transducer assembly is connectable to an ultrasound system and comprises one or more ultrasound transducer elements supported by a cap. The ultrasound transducer elements are operable to direct ultrasound energy toward brain tissue of a subject and/or to receive echo ultrasound energy when the ultrasound transducer assembly is mounted on the head of the subject. Some embodiments include a fillable jacket coupled to the inner surface of the cap and in acoustic contact with the one or more transducer elements.

Ultrasound transducer assembly

A medical imaging system provides increased detectability of targets such as membranes, tendons, muscle fibers and biopsy needles that have strong directional responses. This improved result is achieved by compounding multiple images generated by using only one or two transducer firings per ultrasound line. Speckle variance is also reduced as the result of spatial compounding, and this reduction improves the detectability of soft-tissue lesions.

Medical ultrasonic imaging method and system for spatial compounding

A medical diagnostic ultrasonic imaging method and system subdivide the transmit aperture into two or more subapertures, each subaperture having at least four adjacent transducer elements. The subapertures are phased differently with respect to one another to selectively reduce either fundamental components or harmonic components of echoes from tissue. These techniques can be used to improve contrast agent harmonic imaging as well as tissue harmonic imaging, depending upon the phase shift selected.

Medical ultrasonic diagnostic imaging method and apparatus

An improvement to the method for harmonic imaging including the steps of (a) transmitting ultrasonic energy at a fundamental frequency and (b) receiving reflected ultrasonic energy at a harmonic of the fundamental frequency is provided. The transmitting step includes the step of: applying the plurality of waveforms to a respective plurality of transducer elements, a first waveform of the plurality of waveforms characterized by a first value of a harmonic power ratio, waveforms transmitted from the transducer elements and corresponding to the plurality of waveforms summing as an acoustic waveform substantially at the point, the acoustic waveform characterized by a second value of the harmonic power ratio less than the first value. The imaging method can also include a step for subdividing the transmit aperture into two or more subapertures, each subaperture having at least four adjacent transducer elements. The subapertures are phased differently with respect to one another to selectively reduce either fundamental components or harmonic components of echoes from tissue. These techniques can be used to improve contrast agent harmonic imaging as well as tissue harmonic imaging, depending upon the phase shift selected.

An improvement to the method for harmonic imaging including the steps of (a) transmitting ultrasonic energy at a fundamental frequency and (b) receiving reflected ultrasonic energy at a harmonic of the fundamental frequency is provided. For the improvement, the transmitting step includes the step of transmitting a uni-polar waveform or a waveform characterized by an amplitude change rate of 8 or fewer times pre carrier cycle, said waveform comprising an envelope shape rising gradually to a respective maximum value and falling gradually from the respective maximum value.

Ultrasound imaging method and system for transmit signal generation for

An improvement to the method for harmonic imaging including the steps of (a) transmitting ultrasonic energy at a fundamental frequency and (b) receiving reflected ultrasonic energy at a harmonic of the fundamental frequency is provided. The transmitting step includes the step of transmitting a waveform comprising at least a sequence of at least a first and second pulse characterized by first and second pulse durations, respectively, where the second pulse duration is different than the first duration. This arrangement can reduce harmonic energy in the waveform.

Ultrasonic imaging method and apparatus for generating pulse width

By using a structured vocabulary where subsets of a total large vocabulary are used for speech recognition to control an ultrasound machine, recognition performance is improved. Where the subsets of voice commands are selected to fit the state of the ultrasound machine so as to afford complete control of the machine, little or no degradation of the control of the machine will result. A two-way communication link between the voice control system and the ultrasound machine permits the monitoring of the state of the ultrasound machine so that subsets of the total vocabulary may be made active. From knowledge of the state of the ultrasound machine, dynamic macros may be implemented for streamlined control of the ultrasound machine. A two-way communication link between the voice control system and the ultrasound machine permits simultaneous control by means of, but not limited to, voice control, keyboard and foot-switch.

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Mountain View, CA, United States of America

Daniel E Need