scholarly journals VISUALIZATION OF ACOUSTIC PROPERTIES OF BIOLOGICAL TISSUES BY SCANNING ACOUSTIC MICROSCOPY

1994 ◽  
Vol 14 (Supplement2) ◽  
pp. 189-192
Author(s):  
Yoshifumi SAIJO ◽  
Motonao TANAKA
Keyword(s):  
Biological Tissues ◽  
Acoustic Microscopy ◽  
Acoustic Properties ◽  
Scanning Acoustic Microscopy

Effects of the Cooling Rate on the Acoustic Properties of Pb-10Sn Solder

2012 ◽  
Vol 729 ◽  
pp. 356-360
Author(s):  
Endre Harkai ◽  
Tamás Hurtony ◽  
Péter Gordon
Keyword(s):  
Sound Velocity ◽  
Cooling Rate ◽  
Acoustic Microscopy ◽  
Acoustic Properties ◽  
Scanning Acoustic Microscopy ◽  
Cooling Rates ◽  
Reliability Parameters ◽  
Microscopy Characterization ◽  
The Given

Microhardness and sound velocity were measured in case of differently prepared solder samples. The used Pb-10Sn solder samples were melted then cooled down applying different cooling rates. These procedures caused variant microstructure thus different microhardness and sound velocity values. The sound velocity was measured by means of scanning acoustic microscopy. Characterization of solder materials by acoustic microscopy gives the possibility to non-destructively estimate mechanical and reliability parameters of the given material.

Evaluation of acoustic properties of the live human smooth-muscle cell using scanning acoustic microscopy

1998 ◽  
Vol 24 (9) ◽  
pp. 1397-1405 ◽  
Author(s):  
Aki Kinoshita ◽  
Shoichi Senda ◽  
Katsufumi Mizushige ◽  
Hisashi Masugata ◽  
Seiji Sakamoto ◽  
...  
Keyword(s):  
Smooth Muscle ◽  
Smooth Muscle Cell ◽  
Muscle Cell ◽  
Acoustic Microscopy ◽  
Acoustic Properties ◽  
Scanning Acoustic Microscopy ◽  
Human Smooth Muscle Cell

MATERIAL PROPERTIES OF THE SUPRASPINATUS TENDON AT ITS INSERTION — A MEASUREMENT WITH THE SCANNING ACOUSTIC MICROSCOPY

2004 ◽  
Vol 08 (01) ◽  
pp. 29-34 ◽  
Author(s):  
Hirotaka Sano ◽  
Yoshifumi Saijo ◽  
Shoichi Kokubun
Keyword(s):  
Material Properties ◽  
Sound Speed ◽  
Insertion Site ◽  
Type Ii Collagen ◽  
Supraspinatus Tendon ◽  
Acoustic Microscopy ◽  
Acoustic Properties ◽  
Scanning Acoustic Microscopy ◽  
Type Ii ◽  
Attenuation Constant

The acoustic properties of the supraspinatus tendon insertions of three adult Japanese white rabbits (male, 3.2–3.5 kg) were measured by scanning acoustic microscopy (SAM). After cutting parallel to the supraspinatus tendon fibers, specimens were fixed with 10% neutralized formalin, embedded in paraffin and sectioned at 5 μm thickness. The sound speed and the attenuation constant along the articular surface of the tendon from the insertion site to the musculotendinous junction were measured by SAM. The two-dimensional distribution of the acoustic properties was displayed with color-coded scales and was compared to the histologic structure. Toluidine-blue staining and immunohistochemical staining against type II collagen were performed to determine the presence of fibrocartilage besides a standard Elastica–Masson staining to assess the overall histologic structure. The distribution of the sound speed and the attenuation constant showed an almost identical pattern. Both parameters were lower in the non-mineralized fibrocartilage than those in the tendon proper. The area indicating low sound speed corresponded well to the area of metachromasia and type II collagen. The non-mineralized fibrocartilage indicated softer material properties than the tendon proper, which could be interpreted as an adaptation for the various biomechanical stresses at the insertion site.

scholarly journals Acoustic properties of dialysed kidney by scanning acoustic microscopy

1997 ◽  
Vol 12 (10) ◽  
pp. 2151-2154 ◽  
Author(s):  
H. Sasaki ◽  
Y. Saijo ◽  
M. Tanaka ◽  
S. Nitta ◽  
Y. Terasawa ◽  
...  
Keyword(s):  
Acoustic Microscopy ◽  
Acoustic Properties ◽  
Scanning Acoustic Microscopy

scholarly journals Quantifying Micro-mechanical Properties of Soft Biological Tissues with Scanning Acoustic Microscopy

2011 ◽  
Vol 1301 ◽  
Author(s):  
Xuegen Zhao ◽  
Steven Wilkinson ◽  
Riaz Akhtar ◽  
Michael J Sherratt ◽  
Rachel E B Watson ◽  
...  
Keyword(s):  
Acoustic Wave ◽  
Acoustic Waves ◽  
Wave Attenuation ◽  
Substrate Surface ◽  
Biological Tissues ◽  
Acoustic Microscopy ◽  
Scanning Acoustic Microscopy ◽  
Phase Information ◽  
Soft Biological Tissues ◽  
Acoustic Lens

ABSTRACTIn this study we have established a new approach to more accurately map acoustic wave speed (which is a measure of stiffness) within soft biological tissues at micrometer length scales using scanning acoustic microscopy. By using thin (5 μm thick) histological sections of human skin and porcine cartilage, this method exploits the phase information preserved in the interference between acoustic waves reflected from the substrate surface as well as internal reflections from the acoustic lens. A stack of images were taken with the focus point of acoustic lens positioned at or above the substrate surface, and processed pixel by pixel using custom software developed with LABVIEW and IMAQ (National Instruments) to extract phase information. Scanning parameters, such as acoustic wave frequency and gate position were optimized to get reasonable phase and lateral resolution. The contribution from substrate inclination or uneven scanning surface was removed prior to further processing. The wave attenuation was also obtained from these images.

Acoustic properties of aortic aneurysm obtained with scanning acoustic microscopy

Ultrasonics ◽  
2004 ◽  
Vol 42 (1-9) ◽  
pp. 695-698 ◽  
Author(s):  
Yoshifumi Saijo ◽  
Toshifumi Miyakawa ◽  
Hidehiko Sasaki ◽  
Motonao Tanaka ◽  
Shin-ichi Nitta
Keyword(s):  
Aortic Aneurysm ◽  
Acoustic Microscopy ◽  
Acoustic Properties ◽  
Scanning Acoustic Microscopy

scholarly journals Mapping the Micromechanical Properties of Cryo-sectioned Aortic Tissue with Scanning Acoustic Microscopy

2008 ◽  
Vol 1132 ◽  
Author(s):  
Riaz Akhtar ◽  
Michael J. Sherratt ◽  
Rachel E.B. Watson ◽  
Tribikram Kundu ◽  
Brian Derby
Keyword(s):  
Mechanical Properties ◽  
Acoustic Wave ◽  
Wave Speed ◽  
Biological Tissues ◽  
Elastic Fibre ◽  
Acoustic Microscopy ◽  
Aortic Tissue ◽  
Scanning Acoustic Microscopy ◽  
Frequency Scanning ◽  
Adventitial Layer

ABSTRACTAlthough the gross mechanical properties of ageing tissues have been extensively documented, biological tissues are highly heterogeneous and little is known concerning the variation of micro-mechanical properties within tissues. Here, we use Scanning Acoustic Microscopy (SAM) to map the acoustic wave speed (a measure of stiffness) as a function of distance from the outer adventitial layer of cryo-sectioned ferret aorta. With a 400 MHz lens, the images of the aorta samples matched those obtained following chemical fixation and staining of sections which were viewed with fluorescence microscopy. Quantitative analysis was conducted with a frequency scanning or V(f) technique by imaging the tissue from 960 MHz to 1.1 GHz. Undulating acoustic wave speed (stiffness) distributions corresponded with elastic fibre locations in the tissue; there was a decrease in wave speed of around 40 ms-1 from the adventitia (outer layer) to the intima (innermost).

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