Simuladores para medição de fluxo de liquidos por efeito doppler para controle de qualidade de equipamentos de ultra-sonografia / Doppler phantoms for flow measurement of liquids for ultrasond equipment quality control
AUTOR(ES)
Olívia Campos Coiado
DATA DE PUBLICAÇÃO
2008
RESUMO
In this work it is proposed the development of phantoms to allow de quality control of ultrasounds equipments functioning on the Doppler mode with national technology and accessible cost. The device consists of a hydraulic circuit with a peristaltic pump, mixture simulating human tissue, tubes simulating arteries and blood-mimicking fluid. The peristaltic digital pump made it possible the simulation of cardiac beats, operating with flow rates of 45 to 150 ml/min and pulse rates of 60 to 200 beats/min. The blood-mimicking fluid simulated the human red cells as particles of PVC powder with approximately 64 µm diameter, distilled water, glycerin, detergent and dextran. The tubes simulated arteries, one with 3 mm of internal diameter and 1.5 mm of wall thickness and another with 4 mm of diameter and 1.5 mm thickness wall. For the device assembly of the mimicking tissue a mixture was used containing graphite powder, 45-90 µm diameter glass micro spheres and paraffin with 0.834 g/ml of density for which it was obtained 1450 m/s for the speed wave propagation. Another mixture for mimicking tissue it was used agar, distilled water, glycerin and graphite powder for which it was obtained 1560 m/s for the speed wave propagation. The tests were carried out with an ultrasonic image equipment using a linear transducer operating at 8 MHz and have shown that it can be used for quality control tests of ultrasound imaging equipment
ASSUNTO(S)
ultrasound doppler ultrasonography doppler controle de qualidade phantom ultra-som quality control ultra-sonografia
ACESSO AO ARTIGO
http://libdigi.unicamp.br/document/?code=000432063Documentos Relacionados
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