Ultrasound emitting system for high frequency ultrasonic diagnostic equipment

Abstract

The invention discloses an ultrasound emitting system for high frequency ultrasonic diagnostic equipment, and belongs to the technical field of medical ultrasonic diagnosis technology. The ultrasound emitting system comprises a high frequency array ultrasonic transducer, a high voltage matrix switching circuit, an emitting driving circuit and a field programmable gate array (FPGA) control circuit, wherein the high voltage matrix switching circuit connects array elements of the high frequency array ultrasonic transducer with various emitting channels of the emitting driving circuit, and performs circular switching according to the scanning sequence of ultrasonic beams during ultrasonic imaging; the emitting driving circuit generates high voltage pulses to act on the high frequency array ultrasonic transducer to generate ultrasound; and the FPGA control circuit controls the switching between the high frequency array ultrasonic transducer and the various emitting channels of the emitting driving circuit to generate trigger pulses of the emitting driving circuit. The circuit volume of the whole ultrasound emitting system is reduced, the number of used components is greatly decreased and the hardware cost is effectively controlled.

Description

technical field [0001] The invention relates to the technical field of medical ultrasonic diagnosis, in particular to an ultrasonic emission system used in all-digital portable high-frequency ultrasonic diagnostic equipment. Background technique [0002] In medical ultrasound imaging equipment, the quality of the ultrasound waveform entering the human tissue directly affects the quality of the echo information downstream of the signal chain and the clarity of the final image. In clinical application, the ultrasonic transmission system needs to timely adjust the ultrasonic frequency, peak-to-peak value, duty cycle and pulse number and other parameters according to the depth change of the measured tissue, the switching of scanning mode and the needs of color Doppler blood flow imaging. Make adjustments. [0003] In the ultrasonic imaging system in the prior art, each transmitting channel needs to independently drive two FETs in a FET pair, and the number of FET pairs is the s...

AI Technical Summary

Problems solved by technology

Therefore, the number of transmitting circuit components formed in the traditional way is large, resulting in high manufacturing cost, volume and power consumption, which is not conducive to the development of portable ultrasonic diagnostic equipment; at the same time, because the two outputs of the FET driver are not completely synchronized, it may The two field effect transistors are turned on at the same time, so that the high voltage power supply connected to the field effect transistor driver and the ground are short-circuited, which will cause the risk of circuit damage and poor reliability

Especially when the detection frequency reaches the high-frequency range of 10-20MHz, the narrow trigger pulse will reduce the emission energy, the echo information will be easily overwhelmed by noise, the signal-to-noise ratio will decrease, and the detection depth will decrease

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