A touchscreen-controlled compact ultrasound generator for neuro-stimulation research(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2021年第6期
- Page:
- 764-769
- Research Field:
- 医学信号处理与医学仪器
- Publishing date:
Info
- Title:
- A touchscreen-controlled compact ultrasound generator for neuro-stimulation research
- Author(s):
- DING Xiaoyu; WANG Tingting; LU Xinyi; ZHENG Zheng
- School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
- Keywords:
- Keywords: ultrasound neuro-stimulation ultrasound generator class E power amplifier
- PACS:
- R318.6
- DOI:
- DOI:10.3969/j.issn.1005-202X.2021.06.019
- Abstract:
- Abstract: Ultrasound generator is an important tool for studying ultrasound stimulation, but so far, there is no special equipment to choose from. The ultrasound generator currently used in laboratories is usually built with multiple general-purpose instruments, and it is large in size and complicated in operations. Herein a compact ultrasound generator is designed for neuro-stimulation research. Using touchscreen as control interface is convenient for the input and modification of stimulation parameters. The independent class E final stage power amplifier is very small and can be placed close to the transducer, and moreover, the reactance parameters of the transducer is incorporated into the power amplifier, thus eliminating the need for matching circuits and further reducing the size of the whole machine. The pulsed square wave is generated by the built-in field programmable gate array, and the MOSFET in class E power amplifier can be controlled through a special drive circuit. The test results reveal that the ultrasound generator designed in the study can produce accurate waveforms, with a maximum frequency of 2 MHz. Equipped with a home-made 500 kHz transducer, the proposed ultrasound generator has a output power of 6.23 W and a maximum sound pressure of 168.3 kPa under 30 V power supply voltage, which can also be increased if needed. The proposed generator which is small in size, easy to operate and simple in circuit design is suitable for the research on ultrasound neuro-stimulation.
Last Update: 2021-06-29