Experimental study of transmission of a pulsed focused beam through a skull phantom in nonlinear regime

Articles you may be interested in An MR-compatible phantom for evaluating the propagation of high intensity focused ultrasound through the skull AIP Conf. Experimental and numerical investigation of ultrasonic transmission through the skull bone and associated temperature rise Focusing of therapeutic ultrasound through a human skull: A numerical study Linearity of sound transmission through the human skull in vivo Abstract. In the paper the use of receiving and radiating system, which allows to determine the parameters of bone by nonlinear pulse-echo technique and to image of brain structures through the skull bones, was proposed. Accuracy of the skull bone characterization is due to higher measured harmonic and is significantly better than in linear case. In the experimental part focused piezoelectric transducer with diameter 100 mm, focal distance 100 mm, the frequency of 1.092 MHz was used. It was shown that skull bone profiling can be performed with the use of 3rd harmonic since 1st harmonic can be used for visualization of the underlying objects. The use of wideband systems for both skull profiling and brain visualization is restricted by skull attenuation and resulting low effective sensitivity.