Zuhua Z Mao

6368277, Apr 9, 2002

Apr 5, 2000

09/543030

Zuhua Mao - Issaquah WA
Peng Jiang - Issaquah WA
Patrick L. Von Behren - Bellevue WA
David E. Gustafson - North Bend WA

Siemens Medical Solutions USA, Inc. - Iselin NJ

A61B 800

600441

A method of dynamically measuring parameters within a series of images using image processing is disclosed. A sequence of ultrasound images is generated by means of an ultrasound system. A user determines at least one region of interest within a first image. Then, at least one parameter for each region of interest is evaluated, e. g. the number of pixels exceeding a pre-defined intensity are counted. A new region of interest within a sequential image is searched within a search area around the predefined region of interest which best matches the region of interest. This is done for all images of a sequence whereby the new region of interest which best matches the region of interest of the previous image is used as a region of interest for the following image.

6960169, Nov 1, 2005

May 19, 2003

10/441325

Zuhua Mao - Issaquah WA, US
Hui Jiang - Issaquah WA, US
Patrick Von Behren - Bellevue WA, US

Siemens Medical Solutions USA, Inc. - Malvern PA

A61B008/14

600458

Contrast agent imaging uses spread spectrum coding. The contrast-to-tissue ratio and signal-to-noise ratio for contrast agent imaging is improved by transmitting a waveform with pulses at two or more frequencies. In one embodiment, signals received at an intermodulation frequency responsive to the two transmitted frequencies are isolated and used for imaging. As a result of the differences in responses of contrast agent and tissue to the frequency transitions between pulses, information from contrast agent with minimal influence from tissue is identified. In another embodiment, two waveforms with pulses at two or more frequencies are sequentially transmitted.

7356172, Apr 8, 2008

Sep 26, 2002

10/259350

Liexiang Fan - Issaquah WA, US
Patrick L. Von Behren - Bellevue WA, US
Arun P. Tirumalai - Issaquah WA, US
Zuhua Mao - Issaquah WA, US

Siemens Medical Solutions USA, Inc. - Malvern PA

G06K 9/00
G06K 9/36
A61B 5/00

382128, 382107, 382131, 382132, 600407

Systems and methods are described for tracking motion in a medical imaging system. The methods use landmark sets including hard landmarks and soft landmarks. The systems can include means for generating a landmark set, means for constructing a landmark set spatial relationship, means for computing a context similarity measurement, means for cost function construction, and means for cost function minimization and motion estimation. The invention provides advantages because, among other reasons, the use of a cost function of two or more variables, where the cost function is defined over members of the landmark set collection, and the cost function subject to at least two constraints and the landmark set stability in terms of context similarity measurements and spatial relationship provide effective and robust motion tracking.

8137278, Mar 20, 2012

Sep 12, 2007

11/854373

Andrew K. Lundberg - Woodinville WA, US
Mitchell Kaplan - Lake Forest Park WA, US
Robert E. Stone - Seattle WA, US
Ramachandra Pailoor - Woodinville WA, US
Clinton T. Siedenburg - Everett WA, US
Zuhua Mao - Issaquah WA, US

Sonosite, Inc. - Bothell WA

A61B 8/00

600443, 600447

The present invention is directed to a system and method which makes a phased array look like a curved array for purposes of performing spatial compounding calculations. In one embodiment, the phased array is treated as though it were a curved array by creating both a virtual apex and a virtual radius of curvature. Based on this transformation, standard spatial-compounding resampling tables can be used just as they are with curved arrays. In one embodiment, after the data is compounded to form the target image, certain data is removed prior to the actual display. This removed data represents data generated by virtual rays the prior to the physical skin line of the phased array.

20030069504, Apr 10, 2003

Jul 16, 2002

10/197289

Wilko Wilkening - Bochum, DE
Helmut Ermert - Roettenbach, DE
Bernhard Brendel - Bochum, DE
Zuhua Mao - Issaquah WA, US
Hui Jiang - Issaquah WA, US

Siemens Medical Solutions USA, Inc.

A61B008/00

600/443000

Receive information for multiple pulse sequences are aligned as a function of phase shifts, amplitude weightings or other differences to account at least in part for inaccuracies in the transmit pulses, noise, focusing or other differences. Separate receive filters for each of the echo signals responsive to different transmit pulses provide frequency dependent amplitude weightings or phase shifts. The frequency dependent amplitude weightings or phase shifts compensate for imperfections in the transmit pulse prior to combining the echo signals. The filter may include a various number of taps or inputs, such as two or more taps, providing different spectral characteristics for different echo signals responses to the different transmit pulses. For example, N different linear receive filters are provided for echo signals responsive to each of N different transmit pulses, respectively. Any weightings for canceling information due to combination are applied to the corrected echo signals, and the weighted echo signals are combined to discriminate between nonlinear and linear information or different types of media (e.g. tissue, contrast agent, fluid, . . . ).

58763414, Mar 2, 1999

Jun 30, 1997

8/885075

Hong Wang - Bellevue WA
John Klepper - Seattle WA
Zuhua Mao - Issaquah WA

Siemens Medical Systems, Inc. - Iselin NJ

A61B 806

600441

A BcD mode ultrasound imaging system including a Doppler processor which is configured to receive a Doppler signal having components that are corrupted by residue from color mode interleaving. The Doppler processor is configured to analyze the residue effect and compensate for the residue by filtering the received Doppler signal.

20140336513, Nov 13, 2014

Jul 28, 2014

14/444836

- Shenzhen, CN
Zuhua Mao - Issaquah WA, US
Tinglan Ji - Sammamish WA, US

A61B 8/08

600443

Method and device for performing ultrasonic imaging on a region of interest are disclosed. The method comprises: emitting a first ultrasonic pulse and receiving a first ultrasonic echo signal; emitting a second ultrasonic pulse and receiving a second ultrasonic echo signal; emitting a third ultrasonic pulse and receiving a third ultrasonic echo signal; extracting echo signal components from the first ultrasonic echo signal, the second ultrasonic echo signal and the third ultrasonic echo signal; and producing an ultrasonic image of the region of interest according to the echo signal component; wherein, amplitude weighting of the third ultrasonic pulse is equal to the sum of amplitude weightings of the first ultrasonic pulse and the second ultrasonic pulse in magnitude. The method processes and modulates the plurality of ultrasonic echo signals, so as to separate nonlinear components and linear components in the ultrasonic echo signals.