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Comparison of the efficiencies of Fourier and wavelet expansions in passive acoustic thermal tomography

机译:被动声热层析成像中傅立叶和小波展开效率的比较

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A comparison of the accuracy achieved in temperature-distribution reconstruction by the Fourier and wavelet expansions in passive acoustic tomography is carried out. Since the use of focused ultrasound in hyperthermia leads to local heating of the tissue, the wavelet representation of such temperature distributions with local fluctuations is more compact than their Fourier representation. It is demonstrated that the compactness of the wavelet representation provides an opportunity to reduce considerably the number of unknown quantities in solving the inverse problem of acoustic thermal tomography and to increase the accuracy of the temperature-distribution reconstruction in comparison with the case of using the Fourier representation. A method for choosing a compact wavelet basis for temperature distributions obtained in the hyperthermia process is proposed. (c) 2005 Pleiades Publishing, Inc.
机译:比较了被动声层析成像中傅里叶和小波展开在温度分布重建中获得的精度。由于在热疗中使用聚焦超声会导致组织局部发热,因此这种具有局部波动的温度分布的小波表示比其傅立叶表示更紧凑。结果表明,与使用傅立叶的情况相比,小波表示的紧凑性提供了一个机会,可以大大减少未知量的数量,从而解决声学热层析成像的逆问题,并提高温度分布重构的准确性。表示。提出了一种选择高热过程中温度分布的紧凑小波基的方法。 (c)2005年Pleiades Publishing,Inc.

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