Beam unitized real-time computing technique for receiving apodized parameters and the device thereof

Abstract

The invention relates to a beam composition realtime computation method and device receiving apodization parameter, wherein the device which is connected to the signal input end of the beam composition receiving module of an ultrasonic imaging system as an independent accessory comprises a first, second and third multipliers, a first, second, third and fourth adders, a subtracter, a divider, an extraction ratio memory, a receiving aperture memory, an extraction starting point memory, a preset apodization curve memory, an apodization depth counter, a channel counter, a coefficient selector, a data selector, an address processor and a timing control module. The realtime computation of apodization parameter comprises the following procedures: an apodization reference curve with the length being N is preset inside the system; the preset apodization reference curve is extracted at different start and extraction ratio according to depth with the extraction results being used as apodization curves of different depth of each signal receiving and processing channel. Adopting the technical proposal of the invention can save memory resource of the system and obtains faster parameter loading speed during switching prove of the system.

Description

technical field [0001] The present invention relates to the synthesis of digital beams in a medical ultrasonic diagnostic system, in particular to a real-time calculation method and device for beam synthesis apodization parameters in the receiving process aimed at saving system memory resources. Background technique [0002] In ultrasound imaging equipment, the apodization coefficient is an indispensable parameter for beamforming. For most ultrasound imaging systems, the apodization parameters are calculated in advance and stored in the hardware memory. Since the apodization coefficient is a quantity that changes with the depth of the receiving beam, for linear trapezoidal scanning and phased array scanning, the apodization coefficient is also related to the position of the receiving line, so the total amount of these apodization coefficients may be tens of Mbits ,even more. This will inevitably lead to the addition of additional memory to the system, which will increase t...

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Problems solved by technology

This will inevitably lead to the addition of additional memory to the system, which will increase the cost. In addition, it will take a long time to load new parameters when switching probes, which is inconvenient to use.

[0003] U.S. Patent No. 6,123,671 discloses how different array elements can read corresponding strain trace values ​​from pre-stored apodization parameters, but does not involve real-time calculation of apodization parameters. Because the stored apodization parameters are related to depth, U.S. Patent No. 6,123,671 The solution still consumes a large amount of storage space. Judging from the content of the patent, it is only suitable for vertical emission of convex arrays and linear arrays. Therefore, the applicable surface of the US 6,123,671 patent method is subject to certain restrictions.

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