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Nearfield Scanning Acoustic Microscopy
1993The resolution of a Scanning Acoustic Microscope is directly related to the used wavelength. The practical limit at room temperature is situated around 2 GHz. The main limitation comes from the excessive attenuation in coupling water, which is proportional to f 2, where f is the working frequency. Furthermore, scattering and attenuation in the material
A. Kulik, J. Attal, G. Gremaud
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Measurements of cells in culture by scanning acoustic microscopy
Journal of Microscopy, 1990SUMMARYA novel method allowing the determination of thickness, attenuation and impedance of both living and fixed cells in culture using a single image recorded with a scanning acoustic microscope is described. The method is based on the recording of the image data locating the surface of the cell far below the geometric focus.
J, Litniewski, J, Bereiter-Hahn
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Scanning Laser Acoustic Microscopy
SPIE Proceedings, 1985Following the suggestion of S.Y. Sokolov ( USSR ), a method and equipment has been developed whereby shortwavelength acoustic energy is used to produce magnified views of optically opaque samples non-destructively. The objective of this presentation is to acquaint the audience at this conference with the principle of operation and the application ...
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Acoustic properties of aortic aneurysm obtained with scanning acoustic microscopy
Ultrasonics, 2004In aortic aneurysm tissues, macrophages and their secretion of matrix metalloproteinases (MMPs) are playing important role for tissue degeneration. Some studies have shown that weakening of the mechanical properties of the degenerated tissues may progress the expansion of the aneurysm.
Yoshifumi, Saijo +4 more
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Scanning Nearfield Acoustic Microscopy
1990Scanning Nearfield Acoustic Microscopy (SNAM) is a new method for imaging the topography of non-conducting surfaces using a vibrating tip of high Q as distance sensor. A 32 kHz quartz tuning fork is used as an oscillator driven at resonance by a feedback loop. The feedback signal is used both to excite and to detect the oscillation.
P. Guethner +3 more
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Phase singularities in scanning acoustical microscopy
The Journal of the Acoustical Society of America, 1995Phase sensitive techniques in scanning acoustical microscopy (SAM) yield information on surface height, film thickness, and other sample attributes that is not easily obtained from amplitude imaging alone. The process of unwrapping to obtain the spatial dependence of the attribute from a phase image breaks down in the vicinity of singular points where ...
A. G. Every +4 more
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Scanning acoustic microscopy: a review
Journal of Microscopy, 1983SUMMARYThe main features of the scanning acoustic microscope are reviewed with particular reference to applications in biology and non‐destructive evaluation. Recent developments on imaging the interior of solids are discussed. Proper interpretation of recorded images can lead to maps of velocity and density via the V(z) response.
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An Acoustic Gray Scale for Scanning Acoustic Microscopy and Diagnostic Ultrasound
Ultrasonic Imaging, 1979The principle of a true acoustic gray scale standard is presented and experimentally applied to the Scanning Acoustic Microscope (SAM). The implementation is based on the impedance matching property of a quarter wave impedance transformer through which precise changes in reflection coefficient may be produced in a single material.
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Simulated Scanning for Efficient Scanning Acoustic Microscopy
Pan Pacific Symposium, 2000ABSTRACT One of the drawbacks of Scanning Acoustic Microscopy (SAM) is the amount of time it can take to initially determine the exact gating position within the acoustic waveform (A-scan) necessary to image and inspect a particular interface.
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Scanning Electron Acoustic Microscopy
1988Publisher Summary This chapter introduces complications in the field of scanning electron acoustic microscopy (SEAM) signal interpretation. Any property of the primary electron beam itself or of any of its other interaction products that may cause a mechanical deformation of the sample can cause an SEAM signal.
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