Document Type

Patent

Publication Date

12-10-2013

Abstract

A method for measuring a mechanical property of a subject includes using an ultrasound transducer to apply ultrasonic vibration pulses to a location in a subject in order to induce shear waves at multiple prescribed orthogonal frequencies in the subject. The ultrasound transducer is directed by an excitation signal that is composed of multiple orthogonal basis functions, each having a given frequency component corresponding to the prescribed orthogonal frequencies. The power level of each orthogonal basis function is independently adjustable. The excitation signal can be sparsely sampled, or portions of the excitation signal can be removed in order to improve tissue vibration and to provide for the interleaving ultrasonic vibration and detection pulses. Ultrasonic detection pulses are applied to at least one motion detection point, from which echo signals are received. From the received echo signals, a motion signal is determined, from which mechanical properties of the subject are calculated.

Patent No.: US 8,602,994

Date of Patent: Dec 20, 2013

Filed: Mar 9, 2010

Int. Cl.: A61B 8/00 (2006.01); G01H 1/00 (2006.01)

U.S. Cl.: 600/438; 73/579

CPC Cl.: G01S 7/52022 (2013.01); A61B 8/485 (2013.01); G01S 15/8952 (2013.01); G01S 7/52036 (2013.01)

Field of Search: ;600/437,443 ;702/19,22 ;382/260 ;345/441,501,552 ;73/574,579,587,609

Comments

Also online at US 8602994.

Share

COinS
 
 

To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.