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Dual focusing beam forming method and device based on virtual array elements

A virtual array element and beamforming technology, which is applied in the directions of acoustic wave diagnosis, infrasound wave diagnosis, ultrasonic/sonic wave/infrasound wave diagnosis, etc., and can solve the problem that virtual array element technology is rarely used

Active Publication Date: 2012-10-17
CHONG QING BORN FUKE MEDICAL EQUIP CO LTD
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Problems solved by technology

However, currently in the field of domestic ultrasound imaging, virtual array element technology is rarely applied

Method used

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  • Dual focusing beam forming method and device based on virtual array elements
  • Dual focusing beam forming method and device based on virtual array elements
  • Dual focusing beam forming method and device based on virtual array elements

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Embodiment Construction

[0071] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings; it should be understood that the preferred embodiments are only for illustrating the present invention, rather than limiting the protection scope of the present invention.

[0072] figure 1 It is the comparison chart of traditional focused emission sound field and virtual array element sound field, (1a) traditional emission focus, (1b) sound field of one VE, (1c) sound field of two VEs, VE means virtual array element; figure 2 It is the principle block diagram of dual-focus beamforming DFB based on virtual array elements; image 3 Schematic diagram of scanning line formation and delay parameter calculation for BF1, 3(3a) scanning line diagram, image 3 (3b) Provides a schematic diagram of the calculation of the time delay parameter τ for forming the nth scan line, as shown in the figure: a double-focus beamforming method based on virtual ...

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Abstract

The invention discloses a dual focusing beam forming method and device based on virtual array elements. The method comprises the following steps of: performing primary focusing by using a single fixed focus; calculating a delay parameter of secondary focusing by using the concept of the virtual array elements; and performing secondary focusing according to the principle of delay-and-sum (DAS) beam forming and the dynamic focusing technology to acquire finally imaged scanning line data. Dual focusing beam forming ultrasonic imaging is realized by introducing the virtual array element technology to an ultrasonic imaging system, using a DAS beam synthesis method and performing DAS twice. The method is characterized in that related valid information of a plurality of superposed sound fields is extracted by performing DAS twice, so that information quantity and energy of sound wave signals are increased, and the imaging effect is greatly improved. According to the method, two beam formers BF1 and BF2 and a first in first outlet (FIFO) buffer are used and DAS is performed twice, so that a large quantity of low-resolution echo data is not required to be stored.

Description

technical field [0001] The invention relates to the field of medical ultrasound imaging, in particular to a method and device for combining double-focus beams based on virtual array elements. Background technique [0002] In the field of medical ultrasound imaging, synthetic aperture focusing (SAF) methods based on sound field stacking or image stacking have been widely used. Compared with the traditional time-lapse stacking beamforming method, synthetic aperture focusing imaging is a more potential ultrasonic imaging method, which can significantly improve the resolution of the image, but this method requires sampling and storing the entire echo of each aperture point Signal, that is, full-wave sampling, its reconstruction theory is more complex, and the imaging resolution has a great dependence on the imaging depth, both software and hardware requirements are relatively high; The signal-to-noise ratio (SNR) of the wave signal is very low, and it has a high level of side l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/00
Inventor 王平蒋辉唐英勇赵久明
Owner CHONG QING BORN FUKE MEDICAL EQUIP CO LTD
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