Larry Y Mo

US Patent:

20020169378, Nov 14, 2002

Filed:

Jun 11, 2002

Appl. No.:

10/167606

Inventors:

Larry Mo - San Ramon CA, US
Ching-Hua Chou - Fremont CA, US
Ting-Lan Ji - San Jose CA, US
Glen McLaughlin - Saratoga CA, US

International Classification:

A61B008/00

US Classification:

600/437000

Abstract:

An adaptive clutter filtering for ultrasound color flow imaging is provided including an iterative algorithm that is used to select the best clutter filter for each packet of color flow data. If significant clutter motion is present, a high pass filter cutoff frequency is automatically set to suppress the clutter and associated flash artifacts. The cutoff frequency is chosen according to the frequency of the clutter—the lower the clutter frequency, the lower the cutoff frequency can be. If clutter frequencies are low, lower filter cutoffs allow for maximum low flow detection. In this manner, the filter cutoff frequency can be optimized based on the data for each pixel in the color flow image.

US Patent:

20040199078, Oct 7, 2004

Filed:

Apr 16, 2004

Appl. No.:

10/825719

Inventors:

Larry Mo - San Ramon CA, US
Ching-Hua Chou - Fremont CA, US
Ting-Lan Ji - San Jose CA, US
Glen McLaughlin - Saratoga CA, US

International Classification:

A61B008/00

US Classification:

600/437000

Abstract:

A system and method for adaptive clutter filtering in ultrasound color flow imaging is provided including an iterative algorithm that is used to select the best clutter filter for each packet of color flow data. If significant clutter motion is present, a high pass filter cutoff frequency is automatically set to suppress the clutter and associated flash artifacts. The cutoff frequency is chosen according to the frequency of the clutter - the lower the clutter frequency, the lower the cutoff frequency can be. If clutter frequencies are low, lower filter cutoffs allow for maximum low flow detection. In this manner, the filter cutoff frequency can be optimized based on the data for each pixel in the color flow image.

US Patent:

20040219884, Nov 4, 2004

Filed:

Feb 6, 2004

Appl. No.:

10/774116

Inventors:

Larry Mo - San Ramon CA, US
Akira Yamanaka - Union City CA, US

International Classification:

H04B001/38

US Classification:

455/067110, 455/073000

Abstract:

Aspects for measuring receiver mixer IQ mismatch in a transceiver are described. The measuring includes providing a training signal for a receiver mixer, the training signal having periodic, uncorrelated I and Q signals. A phase mismatch in the receiver mixer is determined from IQ correlation over a unit period. A gain mismatch in the receiver mixer is determined from a power estimate of both I and Q signal for the unit period.

US Patent:

20050131296, Jun 16, 2005

Filed:

Jan 31, 2005

Appl. No.:

11/048288

Inventors:

Ching-Hua Chou - Fremont CA, US
Glen McLaughlin - Saratoga CA, US
Larry Mo - San Ramon CA, US
Ting-Lan Ji - San Jose CA, US

International Classification:

A61B008/00

US Classification:

600443000

Abstract:

Methods for processing ultrasound signals are provided. Processing of ultrasound signals comprises identifying qualified reconstruction channels in a receive aperture, grouping qualified reconstruction channels in the aperture, and preprocessing of selected echo signals using the grouped qualified reconstruction channels to produce reconstruction signals. Additional methodologies comprise comparing a number of channels in a receive aperture with a number of reconstruction channels to determine a number of reconstruction signals and grouping qualified channels in the receive aperture such that the number of reconstruction data signals is not less than the number of reconstruction channels. An ultrasound reconstruction unit comprising a receive aperture control engine configured to use selected echo signals to adaptively determine a set of reconstruction signals is also provided.

US Patent:

20060079778, Apr 13, 2006

Filed:

Oct 7, 2004

Appl. No.:

10/961709

Inventors:

Larry Mo - San Ramon CA, US
Glen McLaughlin - Saratoga CA, US
Brian DeBusschere - Orinda CA, US
Ting-Lan Ji - San Jose CA, US
Ching-Hua Chou - Mountain View CA, US
David Napolitano - Pleasanton CA, US
Kathy Jedrzejewicz - Austin TX, US
Thomas Jedrzejewicz - Austin TX, US
Kurt Sandstrom - San Jose CA, US
Feng Yin - Palo Alto CA, US
Scott Smith - Oak Creek WI, US
Wenkang Qi - Cupertino CA, US
Robert Stanson - LaSalle, CA

Assignee:

Zonare Medical Systems, Inc. - Mountain View CA

International Classification:

A61B 8/06

US Classification:

600447000

Abstract:

An ultrasound scanner is equipped with one or more fuzzy control units that can perform adaptive system parameter optimization anywhere in the system. In one embodiment, an ultrasound system comprises a plurality of ultrasound image generating subsystems configured to generate an ultrasound image, the plurality of ultrasound image generating subsystems including a transmitter subsystem, a receiver subsystem, and an image processing subsystem; and a fuzzy logic controller communicatively coupled with at least one of the plurality of ultrasound imaging generating subsystems. The fuzzy logic controller is configured to receive, from at least one of the plurality of ultrasound imaging generating subsystems, input data including at least one of pixel image data and data for generating pixel image data; to process the input data using a set of inference rules to produce fuzzy output; and to convert the fuzzy output into numerical values or system states for controlling at least one of the transmit subsystem and the receiver subsystem that generate the pixel image data.

US Patent:

20060100520, May 11, 2006

Filed:

Dec 19, 2005

Appl. No.:

11/311949

Inventors:

Larry Mo - San Ramon CA, US
Ching-Hua Chou - Fremont CA, US
Ting-Lan Ji - San Jose CA, US
Glen McLaughlin - Saratoga CA, US

International Classification:

A61B 8/14

US Classification:

600457000

Abstract:

Disclosed herein is the iterative selection of an optimal high pass filter for progressive, ordered filtering of clutter from ultrasound color flow imaging data wherein a criterion for selecting the optimal high pass filter is if a mean frequency of filtered signal data is less than a clutter frequency threshold wherein if the mean frequency is less than the clutter frequency threshold is determined by whether an absolute value of an imaginary part of a first order autocorrelation of the filtered signal data is less than a constant times a real part of the autocorrelation, where the constant is determined by the clutter frequency threshold, wherein a high pass filter input for each iterative selection is the original ultrasound color flow imaging data.

US Patent:

20070038102, Feb 15, 2007

Filed:

Jun 13, 2006

Appl. No.:

11/453336

Inventors:

Ching-Hua Chou - Fremont CA, US
Glen McLaughlin - Saratoga CA, US
Larry Mo - San Ramon CA, US
Ting-Lan Ji - San Jose CA, US

International Classification:

A61B 8/00

US Classification:

600443000

Abstract:

An ultrasound reconstruction unit is provided. In one embodiment, a receive aperture control engine for the unit adaptively determines a set of reconstruction signals based on at least a series of selected echo signals and compares the size of a receive aperture with a predetermined number of reconstruction channels at each imaging point. The unit passes the selected echo signals from selected receive channels of one or more transducer elements to a reconstruction processor if the size of the receive aperture is not greater than the number of reconstruction channels. In another embodiment, the control engine compares the size of the receive aperture with a predetermined number of reconstruction channels at each imaging point and preprocess the selected echo signals to produce reconstructions signals that are equal in number to the number of reconstruction channels if the size of the receive aperture is greater than the number of reconstruction channels. The engine then outputs the reconstruction signals for further processing by a reconstruction processor.

US Patent:

20070123188, May 31, 2007

Filed:

Jan 30, 2007

Appl. No.:

11/668943

Inventors:

Larry Mo - San Ramon CA, US
Akira Yamanaka - Union City CA, US

International Classification:

H04B 1/18
H04B 1/10

US Classification:

455302000, 455285000

Abstract:

Aspects for measuring receiver mixer IQ mismatch in a transceiver are described. The measuring includes providing a training signal for a receiver mixer, the training signal having periodic, uncorrelated I and Q signals. A phase mismatch in the receiver mixer is determined from IQ correlation over a unit period. A gain mismatch in the receiver mixer is determined from a power estimate of both I and Q signal for the unit period.