In:
The Journal of the Acoustical Society of America, Acoustical Society of America (ASA), Vol. 123, No. 5_Supplement ( 2008-05-01), p. 2998-2998
Kurzfassung:
Dramatic shortening of the calculation time provided by the recent progress of the computer technology has made biomedical researchers possible to assess nonlinear acoustic phenomena in soft materials which had been assumed as acting linearly. Besides, the spread of Windows-based personal computer and peripheral devices enabled easier and cheaper configuration of the whole acoustic microscope system such as pulse generation, analogue/digital conversion, mechanical scanning and image processing. According to these progresses, conventional acoustic microscopy with only C-mode imaging has widened its data acquisition mode to B-mode, C-mode, surface acoustic impedance mode, and three-dimensional (3D) imaging. The base of our acoustic microscope system was consisted of (1) PVDF transducer with the central frequency of 100 MHz, (2) ultrasonic pulser made of high speed semiconductor switching, (3) mechanical scanner using two linear servo motors, (4) high speed PCI card digitizer with the sampling frequency of 2 GHz, and (5) personal computer controlling the whole system. For skin imaging, 3D imaging of the fingerprint was reconstructed by consecutive B-mode imaging. Surface acoustic impedance imaging of the fingerprint can be obtained by just putting a finger on a thin plastic plate of the transducer. Conventional C-mode imaging of thinly sliced skin sample presented quantitative values of thickness, attenuation and sound speed of the tissue.
Materialart:
Online-Ressource
ISSN:
0001-4966
,
1520-8524
Sprache:
Englisch
Verlag:
Acoustical Society of America (ASA)
Publikationsdatum:
2008
ZDB Id:
1461063-2
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