30 May 2001 Pulse-echo attenuation imaging
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Abstract
Frequency dependent attenuation is a pronounced feature of ultrasound propagation in human tissues. A new technique for calculating that parameter from backscattered echoes is demonstrated, and it is shown how the information may be incorporated into a gray scale image. Analysis of the noisy nature of attenuation estimates from conventional backscattered echo signals suggests a new technique for producing less erratic estimates, by manipulating zeroes in the complex frequency domain. No signal averaging is needed, and the method lends itself to analysis of short data segments, thereby providing suitable input for attenuation imaging. Rf data is required. The new method is found to considerably reduce the variance of the attenuation estimates from short data segments. It is found that attenuation-weighted B-mode images are an informative way to show results. The method of zero manipulation, presented here, for producing less noisy pulse-echo attenuation estimates represents a powerful approach towards the problem.
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Sidney Leeman, Sidney Leeman, Andrew J. Healey, Andrew J. Healey, Eduardo Tavares Costa, Eduardo Tavares Costa, Hayram Nicacio, Hayram Nicacio, Sayed I. Shah, Sayed I. Shah, } "Pulse-echo attenuation imaging", Proc. SPIE 4325, Medical Imaging 2001: Ultrasonic Imaging and Signal Processing, (30 May 2001); doi: 10.1117/12.428212; https://doi.org/10.1117/12.428212
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