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Ultrasonic beam synthetic focusing parameter real-time algorithm and device thereof

A technology of real-time computing and computing device, applied in the field of medical ultrasound system, can solve the problems of inconvenient multi-beam receiving and focusing correction function, affecting startup and probe switching speed, large memory, etc., to achieve the effect of multi-beam correction

Active Publication Date: 2008-01-02
SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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Problems solved by technology

This is simple and fast, but firstly it requires a large memory, and secondly, it needs to reload a large number of parameters when changing the probe, which affects the startup and probe switching speed
[0006] The U.S. patent No. 6,123,671 (publication date: September 26, 2000) provides a real-time receiving aggregation and apodization parameter calculation method based on the CORDIC algorithm, which is applicable to various geometric probes, including two-dimensional probes, It can also be used for multi-beams. The method is simpler and quicker, and takes up less memory and hardware resources, but it is not convenient to realize the function of multi-beam receiving aggregation correction

Method used

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  • Ultrasonic beam synthetic focusing parameter real-time algorithm and device thereof
  • Ultrasonic beam synthetic focusing parameter real-time algorithm and device thereof
  • Ultrasonic beam synthetic focusing parameter real-time algorithm and device thereof

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Embodiment Construction

[0051] The present invention is applicable to channels such as 24, 48, 64, 128 and multi-beams. Dual-beam is a special case of multi-beam. The following mainly takes the 64-channel dual-beam system as an example for illustration.

[0052] Fig. 1 is a structural block diagram of a B-type medical ultrasound imaging system, and the technical solution of the present invention can be applied to two parts of a transmitting circuit and a beam forming part.

[0053] Fig. 2 is a schematic diagram of beam delay time calculation. The abscissa is the array element sequence of the transducer (probe), and the ordinate is the distance from the center of the array element to the focus position. To achieve the purpose of focusing, that is to make the beams of each array element arrive at the same time. The example in the figure shows the beamline between the outermost array element and several focal points.

[0054] First, take phased array dual-beam reception as an example. In fact, the ...

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Abstract

The invention relates to a kind of method and device to calculate synthesized focusing parameter of supersonic wave beam, and it sets the initial parameter, and adds 2*c2*n+2*tD*n to first intermediate variable sum to calculate the new value of first intermediate variable, and calculate the second intermediate variable sum_a: sum_a=sum-2*T-2*tD+1, and compares the absolute value of first intermediate variable sum and second intermediate variable sum_a, if |sum_a|<|sum|, it will iterative compute the focus matrix delay inequality tD, and the value of first intermediate variable sum is set to be the second intermediate variable sum_a, and the focus bite is 0 or 1 according to the comparing result and output. It just needs to load the limited initial parameter to obtain the ideal focusing parameters by the iterative computation. It fits for linear array, phased array and protrusion array. And it fits for multiple-beam, and supports the multiple-beam to receive the focusing calibration. It can realize in FPGA, and can be used in system with random channels and focuses.

Description

【Technical field】 [0001] The invention relates to a medical ultrasound system, in particular to a method for real-time calculation of focusing parameters of ultrasonic beam synthesis and a device for realizing the method. 【Background technique】 [0002] The medical ultrasound system synthesizes two-dimensional images through scanning lines (or beams), and each two-dimensional image is called a frame image. The total number of frame images formed per second is called the frame rate. The frame rate is a very important parameter. A high frame rate is the basic condition for the true reproduction of fast-moving tissues (such as heart valves). [0003] In order to increase the frame rate, the scanning density can be reduced, but this will sacrifice the spatial resolution of the image; multi-beams can also be used, that is, multiple receiving lines are formed in one transmission, but the distance between each receiving line and the array element is different, resulting in the arri...

Claims

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Application Information

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IPC IPC(8): G01S7/52G01S15/89G10K11/34
Inventor 胡勤军黄勇李勇康小刚程东彪
Owner SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD
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