TY - GEN
T1 - Signed echo imaging with high axial resolution
AU - Umemura, Shin Ichiro
AU - Azuma, Takashi
PY - 2007/12/1
Y1 - 2007/12/1
N2 - A new method is proposed to detect whether the sign of acoustic impedance change in space is positive or negative. Ultrasonic signed echoes were obtained by two times of transmission/reception at a center frequency ratio of N: N+1 (N: a natural number), calculating the (N+1)-th power of the received echo signal at a center frequency of Nf0, and the N-th power of the received echo signal at a center frequency of (N+1)f0, and then performing phase-sensitive detection between the resulting two signals at N(N+1)f 0. An ultrasonic signed echo image of human carotid arterial walls was taken at 5 and 10 MHz with a healthy volunteer. The high axial resolution of the echo image was maintained so that the layer structure of the arterial walls can be observed in the signed echo image as well as in the corresponding conventional B-mode image.
AB - A new method is proposed to detect whether the sign of acoustic impedance change in space is positive or negative. Ultrasonic signed echoes were obtained by two times of transmission/reception at a center frequency ratio of N: N+1 (N: a natural number), calculating the (N+1)-th power of the received echo signal at a center frequency of Nf0, and the N-th power of the received echo signal at a center frequency of (N+1)f0, and then performing phase-sensitive detection between the resulting two signals at N(N+1)f 0. An ultrasonic signed echo image of human carotid arterial walls was taken at 5 and 10 MHz with a healthy volunteer. The high axial resolution of the echo image was maintained so that the layer structure of the arterial walls can be observed in the signed echo image as well as in the corresponding conventional B-mode image.
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U2 - 10.1109/ULTSYM.2007.443
DO - 10.1109/ULTSYM.2007.443
M3 - Conference contribution
AN - SCOPUS:48149109222
SN - 1424413834
SN - 9781424413836
T3 - Proceedings - IEEE Ultrasonics Symposium
SP - 1760
EP - 1763
BT - 2007 IEEE Ultrasonics Symposium Proceedings, IUS
T2 - 2007 IEEE Ultrasonics Symposium, IUS
Y2 - 28 October 2007 through 31 October 2007
ER -