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Medical B-ultrasound front-end excitation device and excitation method thereof

An excitation device and B-ultrasound technology, applied in the field of medical devices, can solve the problems of difficult spectral characteristics and probe characteristics, low emission energy efficiency, difficult to distinguish image details, etc., to improve the detection penetration rate, good work stability, low cost effect

Active Publication Date: 2009-12-16
SHANTOU INST OF UITRASONIC INSTR CO LTD
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AI Technical Summary

Problems solved by technology

Its main disadvantages include: the unipolar high-voltage excitation transmission waveform is a periodic square wave (can be one cycle or multiple cycles), its spectral characteristics are difficult to match with the probe characteristics, the efficiency of transmitting energy is not high, and the penetrating power is weak. The disadvantage that the image details are difficult to distinguish

Method used

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  • Medical B-ultrasound front-end excitation device and excitation method thereof
  • Medical B-ultrasound front-end excitation device and excitation method thereof
  • Medical B-ultrasound front-end excitation device and excitation method thereof

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Embodiment Construction

[0021] Such as Figure 1 ~ Figure 4 Shown, a kind of medical B super-front-end excitation device of the present invention comprises:

[0022] An FPGA (Field Programmable Gate Array (English: Field Programmable Gate Array))-based device used to realize the focus of the transmit beam, the generation of the transmit drive waveform, the control of the apodization of the transmit beam, the multi-channel high-voltage switch circuit and the level conversion and The transmit beam master control unit controlled by the high-voltage drive pulse circuit; among them, the XC3S1200E-4FG320C based on the high-performance SPARTAN 3E series FPGA of XILINX company is used as the master control unit of the entire transmit beam to realize the focus of the transmit beam, Generation of transmission drive waveform, control of transmission beam apodization, multi-channel high voltage switch logic control and level conversion, and control of high voltage drive pulse circuit using Supertex's MD1711FG ch...

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Abstract

The invention discloses a medical B-ultrasound front-end excitation device, comprising a FPGA-based transmitted beam main control unit, a multi-channel high-voltage switch circuit, a level conversion and high-voltage driving pulse circuit, a high-voltage excitation generating circuit, an isolation diode bridge and the control signal circuit thereof. In the invention, an apodization bipolar transmission circuit is adopted, thereby overcoming the characteristics of the beam and the limitation of the spectrum transmitted by the traditional B-ultrasound front-end system which uses unipolar high-voltage pulse. By using a energy distribution apodization excitation technology which is near Gaussian shape, the characteristics and side lobe suppression of the transmitted beam are effectively improved; thereby not only improving the utilization of transmission energy, but also effectively improving the detection penetration when the transmission high-pressure is unchanged. The excitation device can obtain obvious variable frequency effect, and improve the image resolution, so that the image is more uniform and finer, and the overall performance of the system is enhanced.

Description

technical field [0001] The invention belongs to the field of medical equipment, and in particular relates to a medical B-ultrasonic front-end excitation device and an excitation method. Background technique [0002] The traditional B-ultrasonic front-end system uses unipolar high-voltage excitation pulses, and the characteristics and spectrum of the transmitting beam are limited. Its main disadvantages include: the unipolar high-voltage excitation transmission waveform is a periodic square wave (can be one cycle or multiple cycles), its spectral characteristics are difficult to match with the probe characteristics, the efficiency of transmitting energy is not high, and the penetrating power is weak. The disadvantage that the image details are difficult to distinguish. Contents of the invention [0003] The object of the present invention is to address the above problems, provide a bipolar transmission circuit using apodization, and overcome the characteristics of the tran...

Claims

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Application Information

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IPC IPC(8): A61B8/14
Inventor 林武平李德来
Owner SHANTOU INST OF UITRASONIC INSTR CO LTD
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