Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1759720 | Ultrasonics | 2009 | 14 Pages |
Abstract
The maximum signal-to-noise ratio obtained in a uniformly elastic phantom is 20Â dB for both a 1.26Â Hz and a 2Â Hz compression frequency when the radiofrequency echo acquisition is at least 12Â Hz and 20Â Hz respectively. However, for compression frequencies of 2.8Â Hz and 4Â Hz the maximum signal-to-noise ratio obtained is around 16Â dB even for a 40Â Hz frame rate. Our results indicate that unbiased estimation of displacements and strain require ultrasound frame rates greater than ten times the compression frequency, although a frame rate of about two times the compression frequency is sufficient to estimate the compression frequency imparted to the tissue-mimicking phantom. In vivo results derived from short-axis views of the heart acquired from normal human volunteers also demonstrate this frame rate requirement for elastography.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Acoustics and Ultrasonics
Authors
Hao Chen, Tomy Varghese, Peter S. Rahko, J.A. Zagzebski,