TY - GEN
T1 - Time-averaged high contrast ultrasound imaging with motion correction
AU - Yoshikawa, Hideki
AU - Azuma, Takashi
AU - Sasaki, Kazuaki
AU - Kawabata, Ken Ichi
AU - Umemura, Shin Ichiro
PY - 2005/12/1
Y1 - 2005/12/1
N2 - We investigated a high-contrast ultrasound imaging method by averaging multiple frames with motion correction. The purpose of this study is to visualize the vascularity of peripheral vessels filled with contrast agents by using an averaging method which cannot be imaged clearly in conventional contrast image because of low density of the agent. To average signals from the same region of multiple frames accurately, tissue motion must be measured and corrected when averaging. Our approach for measurement is to divide an image into extremely small regions so that loss of correlation caused by tissue motion can be decreased. In vivo results on rabbit kidney revealed that the vascularity, including peripheral vessels, could be clearly imaged without any motion artifact by averaging 100 frames. Moreover, vessels that could not be imaged in the conventional contrast image were clearly imaged as a line structure, which was produced by a slight tissue motion in the slice direction. We also applied this time-averaging method to B-mode images of a human carotid artery. By averaging 30 frames, speckle signals were reduced and vessel, thyroid and the other structures were clearly imaged, because of compounding multiple frames obtained from various angles in the slice direction.
AB - We investigated a high-contrast ultrasound imaging method by averaging multiple frames with motion correction. The purpose of this study is to visualize the vascularity of peripheral vessels filled with contrast agents by using an averaging method which cannot be imaged clearly in conventional contrast image because of low density of the agent. To average signals from the same region of multiple frames accurately, tissue motion must be measured and corrected when averaging. Our approach for measurement is to divide an image into extremely small regions so that loss of correlation caused by tissue motion can be decreased. In vivo results on rabbit kidney revealed that the vascularity, including peripheral vessels, could be clearly imaged without any motion artifact by averaging 100 frames. Moreover, vessels that could not be imaged in the conventional contrast image were clearly imaged as a line structure, which was produced by a slight tissue motion in the slice direction. We also applied this time-averaging method to B-mode images of a human carotid artery. By averaging 30 frames, speckle signals were reduced and vessel, thyroid and the other structures were clearly imaged, because of compounding multiple frames obtained from various angles in the slice direction.
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U2 - 10.1109/ULTSYM.2005.1602906
DO - 10.1109/ULTSYM.2005.1602906
M3 - Conference contribution
AN - SCOPUS:33847119907
SN - 0780393821
SN - 9780780393820
T3 - Proceedings - IEEE Ultrasonics Symposium
SP - 524
EP - 527
BT - 2005 IEEE Ultrasonics Symposium
T2 - 2005 IEEE Ultrasonics Symposium
Y2 - 18 September 2005 through 21 September 2005
ER -