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|Type:||Artigo de evento|
|Title:||Design And Construction Of Transmission And Reception Circuits For Ultrasound Multi-element Transducers|
|Author:||Salinet Jr. J.L.|
|Abstract:||Ultrasound in medicine has gone through great evolution in the last few decades and has occupied important position as a tool in therapy and diagnosis. This is due to the ultrasound be a non-ionizing radiation, the equipment be of relatively low cost, provides a non-invasive imaging method and the images are created and seen in real time. It is very common the use of transducer arrays in order to generate this kind of image. There is a recent effort in Brazil towards the development of electronic circuits, imaging software and transducers for the manufacturing of ultrasound equipment. Our research group is deeply involved in this effort and we intend to show here the desing, construction and first results of the circuitry of a muti-purpose 4-channel pulser/receiver module able to fire multi-element ultrasound piezoelectric transducers and to receive echo signals in the range 0.5-20MHz. The system has transmission and reception circuits with protection against high voltage. The firing transducer element, echo amplification, gain control, and beam forming are controlled by FPGA with hardware and software specially designed to connect the system to a microcomputer. We have tested the electrical characteristics of the pulser/receiver and its use in firing a 1MHz 20-element PZT home made transducer. © 2009 Springer-Verlag.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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