TY - JOUR
T1 - Acoustically Stimulated Electromagnetic Response in Biomedical Tissues
AU - Ikushima, Kenji
AU - Yamada, Hisato
AU - Niimi, Nobuo
AU - Kojima, Yoshitsugu
AU - Yabe, Yutaka
AU - Hagiwara, Yoshihiro
PY - 2018/1/1
Y1 - 2018/1/1
N2 - Ultrasonic irradiation induces alternating electromagnetic polarization through electro- or magneto-mechanical coupling. It follows that electromagnetic fields are generated from a variety of materials when they are acoustically stimulated. In this paper, the acoustically stimulated electromagnetic response is investigated in biomedical tissues that consist of piezoelectric collagen. The response signal is detected through a capacitive resonant antenna tuned to an ultrasonic frequency of 9.0 MHz. First, we have measured an artificial oriented and unoriented collagen. The response signal is definitely observed in thin collagen sheets with a thickness of 300 μm. The signal amplitude in the oriented collagen sheet is several times as large as that in the unoriented one. Next, we have investigated the response signal in bone (rat femur). The ASEM signal is definitely observed even when the bone is decalcified, indicating that the origin of the signal is attributed to collagen. These findings may pave the way for noninvasive medical inspection to evaluate fibrosis or collagen degradation in biomedical tissues.
AB - Ultrasonic irradiation induces alternating electromagnetic polarization through electro- or magneto-mechanical coupling. It follows that electromagnetic fields are generated from a variety of materials when they are acoustically stimulated. In this paper, the acoustically stimulated electromagnetic response is investigated in biomedical tissues that consist of piezoelectric collagen. The response signal is detected through a capacitive resonant antenna tuned to an ultrasonic frequency of 9.0 MHz. First, we have measured an artificial oriented and unoriented collagen. The response signal is definitely observed in thin collagen sheets with a thickness of 300 μm. The signal amplitude in the oriented collagen sheet is several times as large as that in the unoriented one. Next, we have investigated the response signal in bone (rat femur). The ASEM signal is definitely observed even when the bone is decalcified, indicating that the origin of the signal is attributed to collagen. These findings may pave the way for noninvasive medical inspection to evaluate fibrosis or collagen degradation in biomedical tissues.
KW - Electromagnetic response
KW - Ultrasonic
KW - bone
KW - collagen
UR - http://www.scopus.com/inward/record.url?scp=85062485404&partnerID=8YFLogxK
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U2 - 10.1109/ULTSYM.2018.8579666
DO - 10.1109/ULTSYM.2018.8579666
M3 - Conference article
AN - SCOPUS:85062485404
VL - 2018-January
JO - IEEE International Ultrasonics Symposium, IUS
JF - IEEE International Ultrasonics Symposium, IUS
SN - 1948-5719
M1 - 8579666
T2 - 2018 IEEE International Ultrasonics Symposium, IUS 2018
Y2 - 22 October 2018 through 25 October 2018
ER -