Correlation calculation method of colorful blood flow frame

Abstract

The invention relates to a correlation calculation method of a colorful blood flow frame. The correlation calculation method comprises the following steps: calculating a frame correlation coefficient Coef, reading an energy/amplitude/velocity threshold value defined by a system and an attenuation correlation coefficient decaycoef and enabling the energy threshold value to be used for overall control and judgment; judging whether current point blood flow energy reaches the energy threshold value 1 or not; if the current point blood flow energy does not reach the energy threshold value 1, directly using previous frame results for current point output; otherwise, entering the processing step of judging a blood flow velocity direction by using the energy threshold value 2; judging whether a current frame position and a previous identical position are in the same direction or not through front and rear frame point multiplication; if the current frame position and the previous same position are in the same direction, same-direction processing; otherwise, reverse-direction processing. According to the relevant calculation method provided by the invention, not only can a corresponding frame correlation effect be realized, but also the data chaos caused in the processing process can not be caused; different correlation modes can be selected, so that the best diagnostic value is realized; through selecting identical-direction processing modes listed in the correlation calculation method, clinically-required effects can be furthest optimized.

Description

technical field [0001] The invention belongs to the technical field of ultrasonic imaging, and in particular relates to a color blood flow frame correlation calculation method. Background technique [0002] The color blood flow imaging technology is applied in the ultrasonic diagnostic system, which uses the Doppler effect to measure the movement state and parameters of the blood flow or tissue in the diagnosis object, including the movement direction, speed and energy of the blood flow. In clinical diagnosis, the blood flow moving towards the probe is usually marked in red and the opposite direction is indicated in blue. [0003] In traditional two-dimensional imaging, since the signals are all unsigned luminance signals, by using the data correlation of the front and rear frames and using a simple first-order IIR filter, the display enhancement of the diagnostic signal can be realized, and part of the noise can be filtered to enhance the doctor's diagnosis. confidence. ...

AI Technical Summary

Problems solved by technology

[0006] U.S. Patent USP2008 / 0298651A1 provides a method of reverse processing, by processing the reverse blood flow, so that the IIR is not affected by the reverse blood flow and keeps in a good state; USP2008 / 0298651A1 provides a Although this reverse processing method seems to solve the reverse problem and make the filter characteristics applicable in reverse, it actually only processes the first frame after reverse, and its reverse processing is very easy to produce in the second frame. greater chaos

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