Jin Dan Zhang

US Patent:

8615118, Dec 24, 2013

Filed:

May 31, 2011

Appl. No.:

13/149171

Inventors:

Byong Yong Yi - Ellicott City MD, US
Xinsheng Cedric Yu - Clarksville MD, US
Jin Zhang - Catonsville MD, US
Giovanni Lasio - Towson MD, US

Assignee:

The University of Maryland, Baltimore - Baltimore MD

International Classification:

G06K 9/00

US Classification:

382128, 382131, 382132

Abstract:

Techniques for background subtraction in computed tomography include determining voxels in a slice of interest in a three dimensional computed tomography scan of the interior of a body based on a first set of measurements of radiation transmitted through the body. Based on the first set of measurements, a first background image for radiation transmitted through the body in a first direction is determined without the effects of the voxels in the slice of interest. A current image is determined based on a different current measurement of radiation transmitted through the body in the first direction. A first difference is determined between the current image and the first background image. The result is a high contrast image in the slice of interest even from a single current projection image.

US Patent:

20200249351, Aug 6, 2020

Filed:

Aug 16, 2018

Appl. No.:

16/104129

Inventors:

Wei Chen - Ellicott City MD, US
Shan Zhong - Clarksville MD, US
Jin Zhang - Ellicott City MD, US
Zhonghua Zhu - Clarksville MD, US
Lei Wu - Pleasanton CA, US

International Classification:

G01S 17/36
G01S 7/4912
G01S 7/4911
G01S 17/58

Abstract:

The present disclosure relates to a FMCW Light Detection and Ranging system, a wave train of carrier frequency is modulated in narrow-band sequence, an delay interferometer with in-phase and quadrature outputs extracts the phase of this frequency modulation, and a coherent receiver with in-phase and quadrature outputs detects the phase of reflected light from a remote object, the ratio between two phases determines the distance of the remote object.

US Patent:

20200041426, Feb 6, 2020

Filed:

Jul 30, 2019

Appl. No.:

16/526858

Inventors:

- Fremont CA, US
- Gaithersburg MD, US
Daniel F. Sunday - Gaithersburg MD, US
Wenli Wu - Rockville MD, US
Osman Sorkhabi - Danville CA, US
Jin Zhang - Fremont CA, US
Xiaoshu Chen - Fremont CA, US

International Classification:

G01N 23/201

Abstract:

Provided herein are methods and apparatus for characterizing high aspect ratio (HAR) structures of fabricated or partially fabricated semiconductor devices. The methods involve using small angle X-ray scattering (SAXS) to determine average parameters of an array of HAR structures. In some implementations, SAXS is used to analyze symmetry of HAR structures in a sample and may be referred to as tilted structural symmetry analysis-SAXS (TSSA-SAXS) or TSSA. Analysis of parameters such as tilt, sidewall angle, bowing, and the presence of multiple tilts in HAR structures may be performed.

US Patent:

20180192898, Jul 12, 2018

Filed:

Jan 11, 2017

Appl. No.:

15/403184

Inventors:

Jin Zhang - Ellicott City MD, US
Shan Zhong - Clarksville MD, US
Wei Chen - Ellicott City MD, US
Zhonghua Zhu - Clarksville MD, US
Lei Wu - Pleasanton CA, US

Assignee:

OmniSensing Photonics, LLC - Columbia MD

International Classification:

A61B 5/024
A61B 5/00
A61B 5/021
A61B 7/04

Abstract:

The object of the present invention is to disclose a novel optical miniaturized handheld medical device for convenient monitoring and/or data collection of detailed signals on human cardiovascular function. The implementation consists of a number of advanced technologies, including interferometric detection, phase controlled focusing beam steering, auto-tracking scheme and algorism, and integrated optical chip assembly to enhance the device's performance and miniaturization. Briefly, this handheld medical device directs a single or dual output laser beam(s) onto certain skin surface to detect the surface vibration velocity at the point where the laser hits the surface. The skin surface vibrates in response to cardiovascular signals, such as blood pressure pulses, turbulent blood flow through narrowed arteries, pumping actions of the heart, or the closure of the heart valves etc. The miniaturized apparatus thus is capable of detecting these signals for the assessment of cardiovascular functions in both healthy and disease conditions.

US Patent:

20160360978, Dec 15, 2016

Filed:

May 4, 2016

Appl. No.:

15/146354

Inventors:

- Columbia MD, US
Jin Zhang - Ellicott City MD, US
Shan Zhong - Clarksville MD, US
Zhonghua Zhu - Clarksville MD, US

Assignee:

Omnisensing Photonics LLC - Columbia MD

International Classification:

A61B 5/026
A61B 5/00
A61B 5/021

Abstract:

This application discloses a potable, easy-to-use miniature cardiovascular sensor that is capable of monitoring heart rate, blood flow and blood pressure 24/7, using optical non-invasive method. It utilizes interferometric detection to improve signal to noise ratio. It also utilizes phase controlled focusing beam to reduce the optical power needed and therefore minimizing the power consumption, making it practical for continuous monitoring. The integrated optical chip assembly shrinks the total sensor size and makes it suitable for wearable devices, hence, this device will be portable and removable.

US Patent:

20150309141, Oct 29, 2015

Filed:

Apr 27, 2015

Appl. No.:

14/696951

Inventors:

- New York NY, US
Jin Zhang - Union City NJ, US

International Classification:

G01R 33/56
A61B 5/055
G01R 33/32

Abstract:

In another exemplary embodiment of the present disclosure is an exemplary system, method and computer-accessible for determining a characteristic(s) of a tissue(s), that can include, for example, receiving magnetic resonance imaging information regarding the tissue(s) including a time-intensity curve(s) of the tissue(s) based on a contrast agent(s) concentration, actively encoding a part of the time-intensity curve(s) with a magnetic resonance relaxation property(s) of the tissue(s) by varying a magnetic resonance imaging scan parameter(s) to generate encoded data during magnetic resonance data acquisition, and determining the tissue characteristic(s) based on the encoded data.