Xiaoyu Guo

US Patent:

20140024928, Jan 23, 2014

Filed:

Jul 16, 2013

Appl. No.:

13/943649

Inventors:

Xiaoyu Guo - Baltimore MD, US
Ralph Etienne-Cummings - Baltimore MD, US

International Classification:

A61B 8/08
A61B 5/00
A61M 25/00
A61B 1/00
A61B 18/00
A61B 8/00
A61B 8/14

US Classification:

600424, 600459, 600439

Abstract:

A closed-loop ultrasound system includes an ultrasound receiver, an ultrasound transmitter at least one of integral with or at a predetermined position relative to the ultrasound receiver, and a trigger circuit configured to receive detection signals from the ultrasound receiver and to provide trigger signals to the ultrasound transmitter in response to received detection signals. The ultrasound transmitter is configured to transmit ultrasound energy in response to the trigger signals.

US Patent:

20220401025, Dec 22, 2022

Filed:

Aug 22, 2022

Appl. No.:

17/821433

Inventors:

- Cupertino CA, US
Thomas J. SULLIVAN - San Jose CA, US
Xiaoyu GUO - Santa Clara CA, US
Paras SAMSUKHA - San Jose CA, US
Anirban CHATTERJEE - San Jose CA, US

International Classification:

A61B 5/00
A61B 5/24

Abstract:

Detecting user contact with one or more electrodes of a physiological signal sensor can be used to ensure physiological signals measured by the physiological signal sensor meet waveform characteristics (e.g., of a clinically accurate physiological signal). In some examples, a mobile and/or wearable device can comprise sensing circuitry, stimulation circuitry, and processing circuitry. The stimulation circuit can drive one or more stimulation signals on one or more electrodes, the resulting signal(s) can be measured (e.g., by the sensing circuitry), and the processing circuitry can determine whether a user is in contact with the electrode(s). Additionally or alternatively, in some examples, mobile and/or wearable device can comprise saturation detection circuitry, and the processing circuitry can determine whether the sensing circuitry is saturated.

US Patent:

20220319212, Oct 6, 2022

Filed:

Jun 22, 2022

Appl. No.:

17/808157

Inventors:

- Dulles VA, US
Xiaoyu GUO - Sunnyvale CA, US

International Classification:

G06V 30/148
G06N 20/00
G06F 16/332
G06V 30/414
G06F 16/338

Abstract:

Disclosed are systems and methods for generating search result data based on machine-encoded text generated by computer vision optical character recognition machine learning techniques performed on digital media. The disclosed systems and methods provide a novel framework for performing machine learning visual search or machine learning text extraction techniques on digital media in order to extract and analyze the data therein and further conduct search queries based on the extracted and analyzed data. The disclosed framework may leverage the aforementioned computer vision machine learning techniques in order to provide a user with relevant search results regarding objects and text detect in digital media captured on a user device.

US Patent:

20230126412, Apr 27, 2023

Filed:

Dec 23, 2022

Appl. No.:

18/146024

Inventors:

- Dulles VA, US
Xiaoyu GUO - Sunnyvale CA, US

International Classification:

G06V 30/148
G06F 16/332
G06F 16/338
G06N 20/00
G06V 30/414

Abstract:

Disclosed are systems and methods for generating search result data based on machine-encoded text generated by computer vision optical character recognition machine learning techniques performed on digital media. The disclosed systems and methods provide a novel framework for performing machine learning visual search or machine learning text extraction techniques on digital media in order to extract and analyze the data therein and further conduct search queries based on the extracted and analyzed data. The disclosed framework may leverage the aforementioned computer vision machine learning techniques in order to provide a user with relevant search results regarding objects and text detect in digital media captured on a user device.

US Patent:

20210290159, Sep 23, 2021

Filed:

Jun 7, 2021

Appl. No.:

17/340257

Inventors:

- Cupertino CA, US
Erno H. Klaassen - Los Altos CA, US
Paras Samsukha - San Jose CA, US
Xiaoyu Guo - Santa Clara CA, US

International Classification:

A61B 5/00
A61B 5/282
A61B 5/304
A61B 5/316
A61B 5/332

Abstract:

Disclosed herein are devices and methods of using a mobile or wearable device for the acquisition and spatial filtering of ECG signals from an electrode array. One variation of a mobile or wearable device comprises an array of electrodes, one or more reference electrodes, and a controller in communication with the electrodes. In one example, the one or more reference electrodes are located on a wrist-worn device (e.g., a watch), and the electrode array is located on an accessory device that may be contacted with a fingertip. One variation of a spatial filtering method comprises identifying the electrodes that have high levels of noise and excluding the ECG signals from those electrodes from further analyses. In another variation, a method of spatial filtering comprises identifying electrodes with low levels of noise and including only the ECG signals from those electrodes in further analyses.

US Patent:

20200077954, Mar 12, 2020

Filed:

Sep 9, 2019

Appl. No.:

16/565090

Inventors:

- Cupertino CA, US
Thomas J. SULLIVAN - San Jose CA, US
Xiaoyu GUO - Santa Clara CA, US
Paras SAMSUKHA - San Jose CA, US
Anirban CHATTERJEE - San Jose CA, US

International Classification:

A61B 5/00

Abstract:

Detecting user contact with one or more electrodes of a physiological signal sensor can be used to ensure physiological signals measured by the physiological signal sensor meet waveform characteristics (e.g., of a clinically accurate physiological signal). In some examples, a mobile and/or wearable device can comprise sensing circuitry, stimulation circuitry, and processing circuitry. The stimulation circuit can drive one or more stimulation signals on one or more electrodes, the resulting signal(s) can be measured (e.g., by the sensing circuitry), and the processing circuitry can determine whether a user is in contact with the electrode(s). Additionally or alternatively, in some examples, mobile and/or wearable device can comprise saturation detection circuitry, and the processing circuitry can determine whether the sensing circuitry is saturated.

US Patent:

20170188991, Jul 6, 2017

Filed:

Mar 17, 2017

Appl. No.:

15/462616

Inventors:

- Baltimore MD, US
Xiaoyu Guo - Baltimore MD, US
Ralph Etienne-Cummings - Baltimore MD, US
Pezhman Foroughi - Baltimore MD, US

Assignee:

The Johns Hopkins University - Baltimore MD

International Classification:

A61B 8/08
A61B 10/02
A61B 18/14
A61B 17/43
A61B 8/14
A61B 5/00

Abstract:

A closed-loop ultrasound system includes an ultrasound receiver, an ultrasound transmitter at least one of integral with or at a predetermined position relative to the ultrasound receiver, and a trigger circuit configured to receive detection signals from the ultrasound receiver and to provide trigger signals to the ultrasound transmitter in response to received detection signals. The ultrasound transmitter is configured to transmit ultrasound energy in response to the trigger signals.

US Patent:

20160235046, Aug 18, 2016

Filed:

Jan 29, 2016

Appl. No.:

15/009920

Inventors:

- Baltimore MD, US
Emad Boctor - Baltimore MD, US
Xiaoyu Guo - Baltimore MD, US

International Classification:

A01K 85/01
A01K 99/00
G01S 7/00
G01S 7/56
G01S 15/96
G01S 15/89

Abstract:

An underwater imaging system is disclosed. A boat sonar transducer is configured to transmit and receive sonar signals and generate an image of water and surfaces using received sonar signals. An active echo system is configured to be positioned within the water to remotely communicate with the boat sonar transducer. The active echo system includes an ultrasound transducer configured to detect sonar signals transmitted by the boat sonar transducer and transmit an active echo pulse, or a series of active echo pulses, back to the boat sonar transducer. A microprocessor is configured to drive the ultrasound transducer to transmit the active echo pulse, or series of active echo pulses, back to the boat sonar transducer in response to the ultrasound transducer detecting sonar signals transmitted by the boat sonar transducer.