Ultrasonic imaging method and device, and storage medium

1. An ultrasonic imaging method, comprising:

acquiring an ultrasonic echo signal;

segmenting the ultrasonic echo signal into five sub-echo signals according to scan depths, with scan depth ranges corresponding to the sub-echo signals being 0-2.5 cm, 2.5 cm-7.5 cm, 7.5 cm-12.5 cm, 12.5 cm-17.5 cm and 17.5 cm-20 cm respectively;

performing amplitude apodization on each of the sub-echo signals with a predetermined window function to obtain processed sub-echo signals; and

completing ultrasonic imaging according to the processed sub-echo signals,

wherein, at least one of the sub-echo signals is subjected to follow processing:

segmenting the at least one of the sub-echo signals into a second predetermined number of unit echo signals according to the scan depths, and assigning weighting coefficients to each of the unit echo signals;

performing amplitude apodization on each of the unit echo signals with the predetermined window function corresponding to the at least one of the sub-echo signals, and weighting the unit echo signals with the weighting coefficients corresponding to the unit echo signals to obtain processed unit echo signals; and

forming the processed sub-echo signal from the second predetermined number of processed unit echo signals.

2. The method of claim 1 , further comprising:

outputting an ultrasonic imaging result.

3. The method of claim 2 , wherein the predetermined window function comprises at least one of a Blackman window function, a Hanning window function, a cosine window function and a rectangular window function.

4. The method of claim 1 , wherein the predetermined window function comprises at least one of a Blackman window function, a Hanning window function, a cosine window function and a rectangular window function.

5. The method of claim 4 , wherein,

the Blackman window function corresponds to the scan depth of 2.5 cm, the Hanning window function corresponds to the scan depth of 7.5 cm, the cosine window function corresponds to the scan depth of 12.5 cm, and the rectangular window function corresponds to the scan depth of 17.5 cm; and

performing amplitude apodization on each of the sub-echo signals with the predetermined window function comprises:

performing amplitude apodization on the sub-echo signal having the scan depth range of 0-2.5 cm with the Blackman window function;

performing amplitude apodization on the sub-echo signal having the scan depth range of 2.5 cm-7.5 cm with the Blackman window function and the Hanning window function;

performing amplitude apodization on the sub-echo signal having the scan depth range of 7.5 cm-12.5 cm with the Hanning window function and the cosine window function;

performing amplitude apodization on the sub-echo signal having the scan depth range of 12.5 cm-17.5 cm with the cosine window function and the rectangular window function; and

performing amplitude apodization on the sub-echo signal having the scan depth range of 17.5 cm-20 cm with the rectangular window function.

6. The method of claim 1 , wherein the second predetermined number is any integer from 8 to 12.

7. The method of claim 6 , wherein assigning the weighting coefficients to each of the unit echo signals comprises: assigning two sets of weighting coefficients to the unit echo signals, with the two sets of weighting coefficients being a set of weighting coefficients in ascending order of value and a set of weighting coefficients in descending order of value respectively; and

performing amplitude apodization on each of the unit echo signals with the predetermined window function corresponding to the at least one of the sub-echo signals, and weighting the unit echo signals with the weighting coefficients corresponding to the unit echo signals to obtain the processed unit echo signals comprises:

performing amplitude apodization on each of the unit echo signals with two corresponding predetermined window functions to obtain two sets of processing results;

weighting the two sets of processing results with the two sets of weighting coefficients respectively to obtain two sets of weighted processing results; and

obtaining the processed unit echo signal according to the two sets of weighted processing results.

8. The method of claim 7 , wherein segmenting the at least one of the sub-echo signals into the second predetermined number of unit echo signals according to the scan depths comprises:

segmenting each of the least one of the sub-echo signals into 11 unit echo signals according to the scan depths; wherein the sub-echo signal is a sub-echo signal corresponding to the scan depth range of 2.5 cm-7.5 cm, 7.5 cm-12.5 cm or 12.5 cm-17.5 cm, a difference between a maximum scan depth and a minimum scan depth of the scan depth range of each of the first unit echo signal and the last unit echo signal among the 11 unit echo signals is 0.25 cm, and each of the scan depth ranges of the second unit echo signal to the tenth unit echo signal among the 11 unit echo signals has a span of 0.5 cm; and

the weighting coefficients in ascending order of value are integers from 0 to 10, and the weighting coefficients in descending order of value are integers from 10 to 0.

9. The method of claim 8 , further comprising:

performing amplitude apodization on the sub-echo signal having the scan depth range of 0-2.5 cm with the Blackman window function to obtain a processing result, and then multiplying the processing result by a weighting coefficient of 10; and

performing amplitude apodization on the sub-echo signal having the scan depth range of 17.5 cm-20 cm with the rectangular window function to obtain a processing result, and then multiplying the processing result by a weighting coefficient of 10.

10. A non-transitory computer-readable storage medium having computer instructions stored therein, wherein, the computer instructions cause, when executed by a processor, a computer to perform the method of claim 1 .

11. An ultrasonic imaging device, comprising:

an acquisition unit configured to acquire an ultrasonic echo signal; and

a processing unit configured to:

segment the ultrasonic echo signal into five sub-echo signals according to scan depths, with scan depth ranges corresponding to the sub-echo signals being 0-2.5 cm, 2.5 cm-7.5 cm, 7.5 cm-12.5 cm, 12.5 cm-17.5 cm and 17.5 cm-20 cm respectively;

perform amplitude apodization on each of the sub-echo signals with a predetermined window function to obtain processed sub-echo signals; and

complete ultrasonic imaging according to the processed sub-echo signals,

wherein, the processing unit is further configured to:

segment at least one of the sub-echo signals into a second predetermined number of unit echo signals according to scan depths, and assign weighting coefficients to each of the unit echo signals;

perform amplitude apodization on each of the unit echo signals with the predetermined window function corresponding to the at least one of the sub-echo signals, and weight the unit echo signals with the weighting coefficients corresponding to the unit echo signals to obtain processed unit echo signals; and

form the processed sub-echo signal from the second predetermined number of processed unit echo signals.

12. The device of claim 11 , further comprising:

an output unit configured to output an ultrasonic imaging result.

13. The device of claim 11 , wherein the predetermined window function comprises at least one of a Blackman window function, a Hanning window function, a cosine window function and a rectangular window function.

14. The device of claim 13 , wherein,

the Blackman window function corresponds to the scan depth of 2.5 cm, the Hanning window function corresponds to the scan depth of 7.5 cm, the cosine window function corresponds to the scan depth of 12.5 cm, and the rectangular window function corresponds to the scan depth of 17.5 cm; and

the processing unit is further configured to:

perform amplitude apodization on the sub-echo signal having the scan depth range of 0-2.5 cm with the Blackman window function;

perform amplitude apodization on the sub-echo signal having the scan depth range of 2.5 cm-7.5 cm with the Blackman window function and the Hanning window function;

perform amplitude apodization on the sub-echo signal having the scan depth range of 7.5 cm-12.5 cm with the Hanning window function and the cosine window function;

perform amplitude apodization on the sub-echo signal having the scan depth range of 12.5 cm-17.5 cm with the cosine window function and the rectangular window function; and

perform amplitude apodization on the sub-echo signal having the scan depth range of 17.5 cm-20 cm with the rectangular window function.

15. The device of claim 14 , wherein the processing unit is further configured to:

assign two sets of weighting coefficients to the unit echo signals, with the two sets of weighting coefficients being a set of weighting coefficients in ascending order of value and a set of weighting coefficients in descending order of value respectively;

perform amplitude apodization on each of the unit echo signals with two corresponding predetermined window functions to obtain two sets of processing results;

weight the two sets of processing results with the two sets of weighting coefficients to obtain two sets of weighted processing results; and

obtain the processed unit echo signal according to the two sets of weighted processing results.

16. The device of claim 15 , wherein the processing unit is further configured to:

segment each of the at least one sub-echo signal into 11 unit echo signals according to the scan depths; wherein the sub-echo signal is the sub-echo signal corresponding to the scan depth range of 2.5 cm-7.5 cm, 7.5 cm-12.5 cm or 12.5 cm-17.5 cm, a difference between a maximum scan depth and a minimum scan depth of the scan depth range of each of the first unit echo signal and the last unit echo signal among the 11 unit echo signals is 0.25 cm, and each of the scan depth ranges of the second unit echo signal to the tenth unit echo signal among the 11 unit echo signals has a span of 0.5 cm; and

the weighting coefficients in ascending order of value are integers from 0 to 10, and the weighting coefficients in descending order of value are integers from 10 to 0.

17. The device of claim 15 , wherein the processing unit is further configured to:

perform amplitude apodization on the sub-echo signal having the scan depth range of 0-2.5 cm with the Blackman window function to obtain a processing result, and then multiply the processing result by a weighting coefficient of 10; and

perform amplitude apodization on the sub-echo signal having the scan depth range of 17.5 cm-20 cm with the rectangular window function to obtain a processing result, and then multiply the processing result by a weighting coefficient of 10.