Design of Intravascular Ultrasound-enhanced Thrombolysis Excitation System Based on FPGA / 中国医疗器械杂志
Chinese Journal of Medical Instrumentation
;
(6): 210-215, 2020.
Artigo
em Chinês
| WPRIM
| ID: wpr-942729
ABSTRACT
An intravascular ultrasound-enhanced thrombolysis excitation system with adjustable frequency, amplitude and duty cycle was designed based on FPGA (ZYNQ-7Z020). Firstly, the FPGA generated waveform amplitude binary data based on direct digital frequency synthesis (DDS) technology, and then the data was converted into burst signal through an external daughter card, which included D/A conversion circuit, active low-pass filter, power amplifier circuit and impedance matching circuit. The test results demonstrated that the output waveform reached the target with advantages of simple implementation and flexible control, the peak negative pressure generated from ultrasound transducer was doubled by means of an electrical impedance matching network. In vitro thrombus models were applied to verify the excitation system, it turned out that ultrasound cavitation effect generated could accelerate the penetration of urokinase and increase the thrombolysis rate by about 20%.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Terapia Trombolítica
/
Ultrassonografia
/
Impedância Elétrica
/
Ultrassonografia de Intervenção
/
Amplificadores Eletrônicos
Tipo de estudo:
Estudo diagnóstico
Idioma:
Chinês
Revista:
Chinese Journal of Medical Instrumentation
Ano de publicação:
2020
Tipo de documento:
Artigo
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