Title:
超音波撮像システム
Document Type and Number:
Japanese Patent JP4903271
Kind Code:
B2
Abstract:
An ultrasonic imaging system is provided that, when a deviation occurs between a predicted tissue moving direction and a displacement searching direction, can decrease an error caused by the deviation and thereby improve the accuracy of an elasticity image. An elastographic image in which a deviation in a displacement direction is corrected is created based on an RF displacement relating to an ultrasonic wave propagation direction that is calculated based on a cross-correlation between RF signals, and an ultrasonic wave propagation direction component map of applied pressure that uses a correction angle map determined based on a vector displacement map obtained by performing block matching between two-dimensional video images. According to this method, an image of an elasticity ratio can be acquired without a decrease in accuracy even if a tissue displacement vector deviates from the orientation of a normal line vector of a wave transmitting surface of an ultrasonic probe.
Inventors:
Azumatakashi
Application Number:
JP2009541068A
Publication Date:
March 28, 2012
Filing Date:
September 24, 2008
Export Citation:
Assignee:
Hitachi Medical Co., Ltd.
International Classes:
A61B8/08
Domestic Patent References:
| JP2007282932A | 2007-11-01 | |||
| JP2004261198A | 2004-09-24 | |||
| JP2004089362A | 2004-03-25 |
Foreign References:
| WO2007083745A1 | 2007-07-26 | |||
| WO2007046271A1 | 2007-04-26 | |||
| WO2005025425A1 | 2005-03-24 |
Attorney, Agent or Firm:
Yusuke Hiraki
Toshiaki Watanabe
Toshiaki Watanabe