Ultrasonic super-resolution imaging device based on compressed sensing

Abstract

The invention discloses an ultrasonic super-resolution imaging device based on compressed sensing. According to the device, a signal controller and an ultrasonic transmitting array driving circuit areused for controlling an ultrasonic transmitting array, parallel simultaneous transmitting of ultrasonic waves is achieved according to a binary switch matrix, multiple times of spatial modulation areconducted on an ultrasonic sound field, and the modulated sound field penetrates through a target object to be measured; the single ultrasonic receiver receives a measurement signal and uses a high-speed acquisition module to acquire the measurement signal; a computer reconstructs an image by combining a sound field theory with a compressed sensing algorithm, high-resolution imaging can be achieved at a low sampling rate, the resolution limit of a traditional imaging method is broken through, and the resolution of a restored image can far exceed the resolution of an ultrasonic emission arrayfor emission.

Description

technical field [0001] The invention relates to the field of ultrasonic imaging, in particular to an ultrasonic super-resolution imaging device, which can realize ultrasonic super-resolution imaging based on compressed sensing theory. Background technique [0002] Ultrasonic imaging technology is a technology that has important applications in medicine and industrial testing. The technology refers to a series of physical methods that use ultrasonic waves to detect objects to obtain target information. Since ultrasonic waves can penetrate many opaque objects, ultrasonic waves can be used to obtain information on the acoustic properties of the internal structures of these objects. Ultrasonic imaging technology turns these information into images visible to the human eye. The image directly formed by the sound wave is called the sound image. Due to physiological limitations, the human eye cannot directly perceive the sound image. It must be converted into an image or graphic v...

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Problems solved by technology

However, in reality, the aperture of the array cannot be infinitely large. The increase of the aperture will not only impose higher requirements on the manufacturing process, but also limit the application scenarios. At the same time, more signal channels will be generated, which will greatly affect the data processing. pressure

In recent years, some optimization methods have been reported. Although these methods can improve the resolution to varying degrees, they also have certain limitations, that is, the resolution is limited by the aperture of the array, and it is impossible to distinguish Multiple targets within the same beam

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