TY - GEN
T1 - Aberration correction for biological acoustic impedance microscope
AU - Uemura, T.
AU - Suzuki, T.
AU - Hanai, K.
AU - Hozumi, N.
AU - Yoshida, S.
AU - Kobayashi, K.
AU - Yamamoto, S.
AU - Saijo, Y.
PY - 2009
Y1 - 2009
N2 - This report deals with the scanning acoustic microscope for imaging cross sectional characteristic acoustic impedance of biological soft tissues. A focused pulse wave is transmitted to the object placed on the "rear surface" of a plastic substrate. The reflected signals from the target and reference are interpreted into local acoustic impedance. Two-dimensional profile is obtained by scanning the transducer. This method, using a spherical transducer, produces a significant aberration, because the sound speed of the substrate is different from water that is used as a coupling medium. For this reason the spatial resolution is reduced. The spatial resolution was improved by using 3D deconvolution technique, considering the impulse response of the acoustic system. In addition, as the incidence is not vertical, not only longitudinal wave but also transversal wave is generated in the substrate. Calibration for acoustic impedance was carried out after the deconvolution process, considering the above mentioned oblique incidence.
AB - This report deals with the scanning acoustic microscope for imaging cross sectional characteristic acoustic impedance of biological soft tissues. A focused pulse wave is transmitted to the object placed on the "rear surface" of a plastic substrate. The reflected signals from the target and reference are interpreted into local acoustic impedance. Two-dimensional profile is obtained by scanning the transducer. This method, using a spherical transducer, produces a significant aberration, because the sound speed of the substrate is different from water that is used as a coupling medium. For this reason the spatial resolution is reduced. The spatial resolution was improved by using 3D deconvolution technique, considering the impulse response of the acoustic system. In addition, as the incidence is not vertical, not only longitudinal wave but also transversal wave is generated in the substrate. Calibration for acoustic impedance was carried out after the deconvolution process, considering the above mentioned oblique incidence.
KW - Aberration
KW - Acoustic impedanc
KW - Biological tissue
UR - http://www.scopus.com/inward/record.url?scp=77952816920&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=77952816920&partnerID=8YFLogxK
U2 - 10.1109/ULTSYM.2009.5441436
DO - 10.1109/ULTSYM.2009.5441436
M3 - Conference contribution
AN - SCOPUS:77952816920
SN - 9781424443895
T3 - Proceedings - IEEE Ultrasonics Symposium
SP - 1518
EP - 1521
BT - 2009 IEEE International Ultrasonics Symposium and Short Courses, IUS 2009
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2009 IEEE International Ultrasonics Symposium, IUS 2009
Y2 - 20 September 2009 through 23 September 2009
ER -