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| Number | Title | Issue Date |
| 6691387 | Method of using a two-dimensional transducer array A method of manufacturing a two-dimensional ultrasound transducer array is provided in which the transducer array is formed by a plurality of transducer elements sequentially arranged in the azimuth direction and each transducer element has a non-uniform ... | 02/17/2004 |
| 6030345 | Method and system for ultrasound enhanced-resolution spectral Doppler A method and system for generating data for a spectral Doppler strip in an ultrasound system includes a beamformer that provides Doppler data to a signal processor. The signal processor applies an autoregressive model and determines autoregressive paramet... | 02/29/2000 |
| 5957852 | Ultrasonic harmonic imaging system and method The system described ultrasonically images a target with energy spreading transmissions. Generally, ultrasonic energy corresponding to a line focus is transmitted into a target at a fundamental center frequency. The target may or may not include contrast ... | 09/28/1999 |
| 5891037 | Ultrasonic Doppler imaging system with frequency dependent focus A method for measuring Doppler ultrasound information transmits a transmit beam having a frequency dependent focus in which low-frequency components of the transmit beam are focused at long ranges and progressively higher frequency components of the trans... | 04/06/1999 |
| 5871447 | Doppler energy-related parameters in an ultrasound imaging system A method and apparatus for ultrasound imaging of Doppler energy-related parameters is described. An ultrasound imaging system includes a transducer for transmitting an ultrasound signal into a body and receiving a reflected ultrasound signal. The system d... | 02/16/1999 |
| 5860930 | Energy weighted parameter spatial/temporal filter In an ultrasound imaging system, the mean velocity of a fluid flow, variance of velocity of the fluid flow and energy value of Doppler ultrasound signals from the flow in response to transmitted ultrasound are first estimated from autocorrelation values o... | 01/19/1999 |
| 5769079 | Method and apparatus for determining quantitative measures of flow parameters A method for making Doppler ultrasound measurements utilizes an ultrasound probe having two transducer arrays oriented at right angles to one another and spaced apart from one another. The first array is used to measure multiple apparent Doppler parameter... | 06/23/1998 |
| 5617862 | Method and apparatus for beamformer system with variable aperture An ultrasonic scanner imaging system includes connections to one or more transducer arrays of at least M elements each, a transmit beamformer with N processors, and a receive beamformer with N processors. Separate transmit and receive multiplexers permit ... | 04/08/1997 |
| 5562096 | Ultrasonic transducer probe with axisymmetric lens According to the present invention, an ultrasonic transducer probe is provided having an array of ultrasonic transducers rotatably mounted about an axis within the ultrasonic transducer probe, a lens mounted to the array, and a housing encasing the array ... | 10/08/1996 |
| 5549111 | Method and apparatus for adjustable frequency scanning in ultrasound imaging Method for scanning a field of view using a scan format, wherein the carrier frequency of the imaging pulse is higher in the center of the field of view than at the edges. The frequency variation can be accomplished on transmit by modulating appropriately... | 08/27/1996 |
