Title:
METHOD FOR IMAGING STRUCTURE DEFECT, DEVICE FOR IMAGING STRUCTURE DEFECT, METHOD FOR IMAGING BUBBLE OR LESION, AND DEVICE FOR IMAGING BUBBLE OR LESION
Document Type and Number:
WIPO Patent Application WO/2010/007830
Kind Code:
A1
Abstract:
Provided is a method and device for imaging a structure defect with a high frequency resolution and a high spatial resolution and realizing an improved capability of discrimination between a closed crack and an open crack. Furthermore provided is a method and device for imaging a bubble or a lesion with a high frequency resolution and a high spatial resolution and realizing an improved capability of discrimination between a tissue and a bubble or a lesion.
The structure defect imaging device includes an ultrasonic transmitter and an array receiver arranged at first places. A burst ultrasonic wave is directed to a structure from the ultrasonic transmitter, a scattered wave from a defect is received by the array receiver, and a received signal is obtained. The received signal is made to pass through a band-pass filter passing a specific frequency component, and the resultant signal is shifted by different periods of time corresponding to the positions of the reception sensor elements of the array receiver. The shifted signals are added together, and thereby a processing signal is generated. From the processing signal, an image of the defect is obtained. Then the ultrasonic transmitter and the array receiver are rearranged at second places. A similar operation is conducted, and another image of the defect is obtained. The common part of the two images is extracted.
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Inventors:
YAMANAKA Kazushi (1-1 Katahira 2-chome, Aoba-k, Sendai-shi Miyagi 77, 〒9808577, JP)
山中一司 (〒77 宮城県仙台市青葉区片平二丁目１番１号 国立大学法人東北大学内 Miyagi, 〒9808577, JP)
OHARA Yoshikazu (1-1 Katahira 2-chome, Aoba-k, Sendai-shi Miyagi 77, 〒9808577, JP)
山中一司 (〒77 宮城県仙台市青葉区片平二丁目１番１号 国立大学法人東北大学内 Miyagi, 〒9808577, JP)
OHARA Yoshikazu (1-1 Katahira 2-chome, Aoba-k, Sendai-shi Miyagi 77, 〒9808577, JP)
Application Number:
JP2009/059212
Publication Date:
January 21, 2010
Filing Date:
May 19, 2009
Export Citation:
Assignee:
YAMANAKA Kazushi (1-1 Katahira 2-chome, Aoba-k, Sendai-shi Miyagi 77, 〒9808577, JP)
山中一司 (〒77 宮城県仙台市青葉区片平二丁目１番１号 国立大学法人東北大学内 Miyagi, 〒9808577, JP)
OHARA Yoshikazu (1-1 Katahira 2-chome, Aoba-k, Sendai-shi Miyagi 77, 〒9808577, JP)
小原良和 (〒77 宮城県仙台市青葉区片平二丁目１番１号 国立大学法人東北大学内 Miyagi, 〒9808577, JP)
山中一司 (〒77 宮城県仙台市青葉区片平二丁目１番１号 国立大学法人東北大学内 Miyagi, 〒9808577, JP)
OHARA Yoshikazu (1-1 Katahira 2-chome, Aoba-k, Sendai-shi Miyagi 77, 〒9808577, JP)
小原良和 (〒77 宮城県仙台市青葉区片平二丁目１番１号 国立大学法人東北大学内 Miyagi, 〒9808577, JP)
International Classes:
G01N29/44; A61B8/00; G01B17/06
Attorney, Agent or Firm:
SUDA Atsushi et al. (2-10-605, Nishikicho 1-chomeAoba-k, Sendai-shi Miyagi 12, 〒9800012, JP)
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