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SYSTEM FOR DETECTION AND QUANTIFICATION OF IMAGE MOTION IN IMAGES WITH CARDIAC PULSATIONS

IP.com Disclosure Number: IPCOM000030784D
Publication Date: 2004-Aug-26
Document File: 4 page(s) / 755K

Publishing Venue

The IP.com Prior Art Database

Related People

Lei Sui: INVENTOR [+2]

Abstract

Object motion in the time domain 2D ultrasound images can be transformed into the frequency domain where it reveals the motion frequencies, magnitudes and phases of the frequencies, and frequencies at a certain time. That frequency information can be used to describe the motion quantitatively. In 2D ultrasound imaging aligning with some timing or gating methods, real time motion analysis in the frequency domain is possible. This invention is to bring echo phase imaging (EPI), a frequency domain parametric imaging method, or other similar methods into real time application.

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Page 1 of 4

Our Docket No.: 2004J12144

Title: SYSTEM FOR DETECTION AND QUANTIFICATION OF IMAGE MOTION IN IMAGES WITH CARDIAC PULSATIONS
Inventor(s): Lei Sui, Pat Von Behren

Page 2 of 4

1. Abstract/General purpose of the Invention.

Object motion in the time domain 2D ultrasound images can be transformed into the frequency domain where it reveals the motion frequencies, magnitudes and phases of the frequencies, and frequencies at a certain time. That frequency information can be used to describe the motion quantitatively. In 2D ultrasound imaging aligning with some timing or gating methods, real time motion analysis in the frequency domain is possible. This invention is to bring echo phase imaging (EPI), a frequency domain parametric imaging method, or other similar methods into real time application.

2. Old Methods.

No real time processing of EPI or similar methods in ultrasound is available.

3. Detailed Description/Construction.

A gating or time method such as ECG signal is attached to the 2D ultrasound imaging. 2D ultrasound cardiac images in the four chamber apical view, two chamber apical view, long axis view or short axis view are collected. When the timing signal comes, the collected images are applied with frequency transforms. Certain frequency components are color encoded and displayed. In EPI, it is phase and magnitude of the first harmonic.

Real lime processing can be applied to the color encoded display to remove unwanted signals. In EPI, the ratio of the magnitude of the first harmonic to the magnitudes of all non-zero frequencies at each pixel location is computed and an adaptive thresholding method masks out the blood pools, which usually have the low ratios.

If regions of interest are given, the average frequency component changes can be displayed over time during image acquisition. The EPI functional images of amplitude and phase may be updated and displayed to the operator for each and every R-R interval. Similarly, other parametric v...