Title :
Computational evaluation of the thermal resolution on ultrasonic thermometry using an improved spectral analysis of echo-signal patterns modeled ad-hoc
Author :
Bazán, I. ; Ramos, A. ; Ramirez, A. ; Castellanos, L.
Author_Institution :
Res. & Postgrade Dept., Inst. Tecnol. de Orizaba, Veracruz, Mexico
Abstract :
This work provides a quantitative specific evaluation of the spectral analysis performance when applied to ultrasonic multiecho-signals, in order to extract information from them, for non-invasive temperature estimation purposes, inside a biological tissue. This specific evaluation was oriented to assess the thermal resolution provided by the application of resolution improvements in this tool. Simulated signals, based on a numerical model of an ultrasonic echo-trace acquired from biological media, were used to perform tests considering several parameters under a controlled situation. One of the most important parameters to be controlled, in calculations for this simulated approach, was the minimum temperature rise considered for evaluation: 0.05°C. Results about harmonics behavior in the here obtained High-Resolution Power Spectral Densities (HR-PSD) are shown and compared with the theoretically expected shift calculations. Commitments between ultrasonic parameters, biological tissues characteristics and signal processing requirements, are discussed for a real experiment, and some conclusions about results are presented.
Keywords :
biological tissues; biomedical ultrasonics; biothermics; echo; medical signal processing; spectral analysis; HR-PSD; High-Resolution Power Spectral Densities; ad-hoc modeling; biological tissue; computational evaluation; echo-signal patterns; harmonics behavior; improved spectral analysis; noninvasive temperature estimation; thermal resolution; ultrasonic multiecho-signals; ultrasonic thermometry; Biological system modeling; Biological tissues; Biology computing; Data mining; Numerical models; Performance evaluation; Signal resolution; Spectral analysis; Temperature; Testing; Thermal resolution; echo-signals; non invasive temperature estimation; spectral analysis;
Conference_Titel :
Health Care Exchange (PAHCE), 2010 Pan American
Conference_Location :
Lima
Print_ISBN :
978-1-4244-6291-9
DOI :
10.1109/PAHCE.2010.5474582