Frequency independence of ultrasound transit time spectroscopy
Wille, Marie-Luise & Langton, Christian M. (2015) Frequency independence of ultrasound transit time spectroscopy. In Toi, Vo Van & Phuong, Tran Ha Lien (Eds.) IFMBE Proceedings: 5th International Conference on Biomedical Engineering in Vietnam, Springer, Vietnam, pp. 39-42.
Recent studies have shown that ultrasound transit time spectroscopy (UTTS) is an alternative method to describe ultrasound wave propagation through complex samples as an array of parallel sonic rays. This technique has the potential to characterize bone properties including volume fraction and may be implemented in clinical systems to predict osteoporotic fracture risk. In contrast to broadband ultrasound attenuation, which is highly frequency dependent, we hypothesise that UTTS is frequency independent. This study measured 1 MHz and 5 MHz broadband ultrasound signals through a set of acrylic step-wedge samples. Digital deconvolution of the signals through water and each sample was applied to derive a transit time spectrum. The resulting spectra at both 1 MHz and 5 MHz were compared to the predicted transit time values. Linear regression analysis yields agreement (R2) of 99.23% and 99.74% at 1 MHz and 5 MHz respectively indicating frequency independence of transit time spectra.
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|Item Type:||Conference Paper|
|Keywords:||Deconvolution, Ultrasound, Transit Time Spectrum, Solid Volume Fraction|
|Subjects:||Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Medical Physics (029903)|
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2015 Springer International|
|Deposited On:||18 May 2015 23:46|
|Last Modified:||03 May 2016 10:44|
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