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| Number | Title | Issue Date |
| 6023968 | Real-time two-dimensional resistance and pulsatility mapping A method and apparatus for determining resistance and pulsatility indices of a flow of material, such as the flow of blood in the human body. This may be implemented, for example, in a color flow module in an ultrasonic imaging system for display of the p... | 02/15/2000 |
| 5957138 | Method and apparatus for three-dimensional flow lumen imaging A method and apparatus for generating three-dimensional (3D) images of flow structures and their flow lumen using ultrasound techniques. According to one aspect of the invention, a border between a flow region and a non-flow region is used to render a thr... | 09/28/1999 |
| 5482044 | Direct demodulation in ultrasound instruments A direct digital demodulator for demodulating ultrasound signals. The demodulator includes a baseband demodulator, a magnitude and differential phase generator, and a Doppler preprocessor. The demodulator further includes an interface for receiving a sign... | 01/09/1996 |
| 5446800 | Method and apparatus for displaying angiographic data in a topographic format A method and apparatus for displaying an image representing the flow of a substance in a scanned area. An Angio scanner scans a region of tissue and generates Ultrasound Angio data representing the flow of blood in the region of tissue. Relatively small b... | 08/29/1995 |
| 5437281 | Direct demodulation in ultrasound instruments A direct digital modulator for demodulating ultrasound signals. The demodulator includes a baseband demodulator, a magnitude and differential phase generator, and a Doppler preprocessor. The demodulator further includes an interface for receiving a signal... | 08/01/1995 |
| 5413105 | Median temporal filtering of ultrasonic data A method and apparatus of processing signals in an ultrasonic imaging system for imaging a living subject. The ultrasonic imaging system including an ultrasonic emitter, receptor and display. N temporally-spaced signals from ultrasound produced by a plura... | 05/09/1995 |
| 5394874 | Angiography using ultrasound Method and apparatus for performing angiography of a subject under examination in an ultrasonic imaging apparatus. A set of ultrasonic reference pulses along each of a series of parallel vectors is emitted into the subject under examination, echoes are re... | 03/07/1995 |
| 5379642 | Method and apparatus for performing imaging An ultrasound imaging system for performing dynamic focusing of ultrasonic waves during transmit and receive. The present invention includes a method and a means for transmitting ultrasonic waves to a multiple depths within a body. The present invention o... | 01/10/1995 |
| 5357580 | Temporal filtering of color doppler signal data An apparatus for temporal filtering in an ultrasonic imaging system. The apparatus has a means for storing previous imaging information from a previous time period and a means for storing current imaging information from a current time period. Means for d... | 10/18/1994 |
