Delay parameter computation method for multi-channel scanning and device thereof

Abstract

The invention provides a delay parameter computation method for a multi-channel scanning, which unifies delay computational formulas of three probes such as a linear array, a convex array and a phased array, and the formulas are applicable to non-deflection scanning and deflection scanning; and scanning lines with different densities can be calculated only by changing location variables of the scanning lines. In the invention, only an array element position, a scanning starting point position and relative focus parameters need to be stored, thus having small quantity of stored data; real-timecomputation can realize accurate delay without a large quantity of the stored data; delay in various situations for the probes, the density and deflection is calculated using a unified circuit to greatly simplify a circuit structure; and delay of each scanning line is independently controlled to conveniently realize arbitrary density scanning, for if no integral multiple relationship exists between spacing among the scanning lines and spacing among array elements of the probes, different scanning lines have different delay data. In the invention, the scanning lines are independently controlled, thus achieving arbitrary density scanning.

Description

technical field [0001] The present invention provides a method and device for real-time and precise control of multi-channel scanning delay parameters of an ultrasonic system, realizes accurate focusing of ultrasonic transmitting scans and receiving scans, improves the consistency of ultrasonic waves in each channel, and thereby improves the quality of ultrasonic imaging. Background technique [0002] In order to achieve accurate focusing during the transmission and scanning of the ultrasound system, each array element has a different sequence of transmission and reception according to the relative position of the space relative to the focal point. In the ultrasonic diagnostic system, whether it is B-type, C-type or D-type imaging, scanning focus is required to superimpose the transmission signals or echo signals of each channel in the same phase, improve the signal-to-noise ratio to increase the dynamic range of the signal, and The spatial resolution of the imaging is great...

AI Technical Summary

Problems solved by technology

[0003] Due to different types of probes, such as linear array, convex array, and phased array; different scanning methods, such as non-deflected scanning, deflected scanning, extended imaging (T-type) scanning, phased array scanning, and spatial compounding; different scanning densities , such as high, medium and low density scanning, the delay calculation method is more complicated

The traditional method is to download the delay parameters to the hardware memory, and take these parameters out of the memory during scanning to control the focus. On the one hand, it is necessary to update the memory area parameters when switching between different probes and scanning methods, which brings switching Transient; on the other hand, due to the large amount of data, especially the receiving scan in the case of T-scan, phased array scan, space composite, etc., the original delay data may have hundreds of Mbits. Or the unnecessary waiting time of mode switching is unacceptable in terms of storage area space. Some approximate processing of data is required to reduce storage and transmission time, which leads to loss of precision and increase in complexity of circuit implementation.

There are also some systems that provide array element coordinates, focus coordinates, deflection angles, etc. to the logic, and the logic calculates the delay parameters in real time through some algorithms, but these methods are relatively complicated, and the logic needs to deal with the complex geometric relationship of the probe, which is difficult to implement. certain degree of difficulty

[0004] As described in the previous section, the existing technologies either have a large amount of data or inaccurate delays, or the logic implementation is more complicated

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