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A high angle and range resolution imaging method using a double-ping frequency diverse multiple-input multiple-output (MIMO) sonar is proposed. The proposed MIMO sonar is composed of a uniform linear array (ULA) and two transmitting elements located at the two ends of the receiving ULA. The interelement spacing of the two transmitting elements is equal to the produce of the inter-element spacing and...
The effect of microbubble size on the acoustic properties of ultrasound contrast agents has been studied over the clinical frequency range (<10MHz), but comparable research at high frequency is limited. As a further development of high frequency ultrasound in preclinical, intravascular and superficial tissue imaging, this study quantified the attenuation and contrast to tissue ratio (CTR) of two...
Measurement of transmission lines galloping amplitude is the very important part of wire monitoring. Aimed at reducing errors of the method, this paper presents a improved method which applies acceleration transducer for getting the precise values of galloping amplitude. This paper states the fundamental of the way using acceleration transducer to measure wires' galloping acceleration and then bring...
High frequency ultrasound (>15 MHz) is used in the fields of pre-clinical, intravascular, ophthalmology and superficial tissue imaging. Tissue-equivalent phantoms have previously been developed to enable relevant quality assurance measurements for frequencies lower than 15MHz but to date limited data is available on the acoustic properties of tissue equivalent material at frequencies higher than...
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