Comparison of integrated backscatter values obtained with acoustic densitometry with values derived from spectral analysis of digitized signals from a clinical imaging system

Mark R. Holland, Christopher S. Hall, Stephen H. Lewis, Scott M. Handley, Ann E. Finch-Johnston, Alwyn P. D'Sa, Julio E. Perez, James G. Miller

Research output: Contribution to journalArticle

11 Scopus citations

Abstract

Time-domain-based integrated backscatter values obtained with the use of acoustic densitometry (AD) were compared with values determined from a spectral-based analysis of the radio-frequency (RF) signals with a modified Hewlett-Packard Sonos 1500 imaging system. Integrated backscatter images of five specimens of bovine tendon were acquired in the AD acquisition mode, and the corresponding signals related to the backscattered RF were digitized for each angle of insonification as the specimens were rotated in 10-degree increments. The integrated backscatter images were analyzed with the AD analysis package, and the corresponding values determined from the RF power spectra were obtained from the digitized ultrasonic signals. Good agreement was found between the two methods over the entire range of measured values. The mean anisotropy in the measured integrated backscatter (mean ± standard error) was found to be 27 ± 2 dB for time-domain-based analysis and 25 ± 2 dB for RF spectral-based analysis.

Original languageEnglish
Pages (from-to)511-517
Number of pages7
JournalJournal of the American Society of Echocardiography
Volume10
Issue number5
DOIs
StatePublished - Jan 1 1997
Externally publishedYes

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