ULTRASONIC VELOCITY SPATIAL DISTRIBUTION ANALYSIS OF BIOLOGICAL MATERIALS WITH THE SCANNING LASER ACOUSTIC MICROSCOPE.

P. M. Embree, S. G. Foster, G. Bright, W. D. O'Brien

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this work, the Scanning Laser Acoustic Microscope (SLAM) is used to measure the spatial variation of the speed of sound in tissue, thereby providing a quantitative ultrasonic parameter for tissue characterization. The SLAM provides three different television type images. A laser scans the lower surface of the coverslip in order to detect mechanical disturbances induced by the 100 MHz ultrasonic energy which has passed through the specimen from below. The optical (laser scan) transmission image allows the operator to position the sample in the center of the 2 mm multiplied by 3 mm field of view. The acoustic image shows the amount of ultrasound energy passing through the sample. This signal is proportional to the envelope of the laser detector output. In this image, dark areas correspond to high areas of ultrasonic attenuation and light areas to low attenuation areas. The third image, the interference image, is produced by electronically mixing the laser detector output with a 100 MHz reference signal. 5 refs.

Original languageEnglish (US)
Title of host publicationAcoustical Imaging
Subtitle of host publicationProceedings of the International Symposium
EditorsM. Kaveh, R.K. Mueller, J.F. Greenleaf
PublisherPlenum Press
Pages203-216
Number of pages14
ISBN (Print)0306417170
StatePublished - Dec 1 1984

Publication series

NameAcoustical Imaging: Proceedings of the International Symposium
Volume13
ISSN (Print)0270-5117

ASJC Scopus subject areas

  • Engineering(all)

Fingerprint

Dive into the research topics of 'ULTRASONIC VELOCITY SPATIAL DISTRIBUTION ANALYSIS OF BIOLOGICAL MATERIALS WITH THE SCANNING LASER ACOUSTIC MICROSCOPE.'. Together they form a unique fingerprint.

Cite this