An Acoustic Gray Scale for Scanning Acoustic Microscopy and Diagnostic Ultrasound
- 1 January 1979
- journal article
- research article
- Published by SAGE Publications in Ultrasonic Imaging
- Vol. 1 (1) , 89-100
- https://doi.org/10.1177/016173467900100107
Abstract
The 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. The performance of the first implementation designed for 375 MHz operation is described and the implications of its use are discussed in detail. The application of the principle to diagnostic ultrasound is also treated.Keywords
This publication has 7 references indexed in Scilit:
- Characteristic material signatures by acoustic microscopyElectronics Letters, 1978
- Image resolution of the scanning acoustic microscopeApplied Physics Letters, 1977
- Phase imaging in reflection with the acoustic microscopeApplied Physics Letters, 1977
- Ultrasound grey scale display on storage oscilloscope systemUltrasonics, 1977
- Acoustic properties of sputtered glass at microwave frequenciesApplied Physics Letters, 1976
- Principles and classification of soft tissues by grey scale echographyUltrasound in Medicine & Biology, 1976
- Development of a Broadband Reflective Array 10,000:1 Pulse Compression FilterPublished by Institute of Electrical and Electronics Engineers (IEEE) ,1974