Ultrasound diagnosis apparatus operable in doppler mode

1. An ultrasound diagnosis apparatus, comprising:

a probe configured to perform an alternating scan along a raster in each of plural Doppler groups of ultrasound beam directions so as to acquire first and second Doppler-mode image frames;

a controller coupled to the probe and configured to control the probe to treat a last group of the ultrasound beam directions for the first Doppler-mode image frame and an initial group of the ultrasound beam directions for the second Doppler-mode image frame as one Doppler group of the ultrasound beam directions;

a processor coupled to the probe and configured to detect a Doppler-mode signal based on the alternating scan along a raster so as to prepare the first and second Doppler-mode image frames; and

an output unit coupled to the processor and configured to output the prepared first and second Doppler-mode image frames.

2. The apparatus according to claim 1 , wherein the second Doppler-mode image frame is acquired next to the first Doppler-mode image frame.

3. The apparatus according to claim 1 , wherein the output unit is a display unit configured to display the first and second Doppler-mode image frames.

4. The apparatus according to claim 1 , wherein the output unit transmits the first and second Doppler-mode image frames through network.

5. The apparatus according to claim 1 , wherein the output unit stores the first and second Doppler-mode image frames in a memory medium.

6. The apparatus according to claim 1 , wherein the processor is further configured to prepare a processed Doppler-mode image frame based on at least the first and second Doppler-mode image frames, and the output unit outputs the processed Doppler-mode image frame as the prepared first Doppler-mode image frame.

7. The apparatus according to claim 6 , wherein the processor prepares the processed Doppler-mode image frame by averaging at least the first and second Doppler-mode image frames.

8. The apparatus according to claim 6 , wherein the processor prepares the processed Doppler-mode image frame by weighting at least the first and second Doppler-mode image frames.

9. The apparatus according to claim 1 , wherein the processor is further configured to perform a B-mode scan in an interval between the alternating scan along a raster in a first Doppler group of the ultrasound beam directions and the alternating scan along a raster in a second Doppler group of the ultrasound beam directions.

10. The apparatus according to claim 1 , wherein the probe is further configured to perform B-mode groups of B-mode scan with at least one ultrasound beam so as to acquire first and second B-mode image frames, the B-mode groups being performed in at least two intervals between the Doppler groups for each of the first and second B-mode image frames; the processor is further configured to detect a B-mode signal based on the B-mode scan so as to prepare the first and second B-mode image frames; the controller is further configured to control the probe so that a first boundary position in the first B-mode image frame originating from one and a next B-mode groups of the B-mode scan differs from a second boundary position in the second B-mode image frame originating from one and a next B-mode groups of the B-mode scan; and the output unit is further configured to output the prepared first and second B-mode image frames.

11. The apparatus according to claim 10 , wherein the second B-mode image frame is acquired next to the first B-mode image frame.

12. The apparatus according to claim 10 , wherein the controller treats a last group of the B-mode scan for the first B-mode image frame and an initial group of the B-mode scan for the second B-mode image frame as one B-mode group of the B-mode scan.

13. The apparatus according to claim 10 , wherein a number of the ultrasound beams in an initial B-mode group of the B-mode scan for the second B-mode image frame is fewer than a number of the ultrasound beams in a next B-mode group of the B-mode scan for the second B-mode image frame.

14. The apparatus according to claim 13 , wherein the probe stops scanning for a period corresponding to a difference between the numbers of the ultrasound beams in the initial B-mode group and the next B-mode group after the B-mode scan for the first B-mode image frame.

15. The apparatus according to claim 13 , wherein the probe scans in a field other than the second B-mode image frame for a period corresponding to a difference between the numbers of the ultrasound beams in the initial B-mode group and the next B-mode group after the B-mode scan for the first B-mode image frame.

16. The apparatus according to claim 10 , wherein the processor is further configured to prepare a processed B-mode image frame based on at least the first and second B-mode image frames, and the output unit outputs the processed B-mode image frame as the prepared first B-mode image frame.

17. The apparatus according to claim 16 , wherein the processor prepares the processed B-mode image frame by averaging at least the first and second B-mode image frames.

18. The apparatus according to claim 16 , wherein the processor prepares the processed B-mode image frame by weighting at least the first and second B-mode image frames.

19. An ultrasound diagnosis apparatus for obtaining first and second Doppler-mode image frames, the apparatus comprising:

a probe configured to perform an interleaving scan for each of the first and second Doppler-mode image frames, each of the first and second Doppler-mode image frames being divided into a plurality of interleaving scan groups;

a controller configured to control the probe so that a last group of the interleaving scan groups in the first Doppler-mode image frame has a smaller size than another one of the interleaving scan groups in the first Doppler-mode image frame; an initial group of the interleaving scan groups in the second Doppler-mode image frame has a smaller size than another one of the interleaving scan groups in the second Doppler-mode image frame; and a combined size of the last and initial interleaving scan groups is similar to a size of the another one of the interleaving scan groups in one of the first and second Doppler-mode image frames;

a processor coupled to the probe and configured to detect a Doppler-mode signal based on the interleaving scan so as to prepare the first and second Doppler-mode image frames; and

an output unit coupled to the processor and configured to output the prepared first and second Doppler-mode image frames.

20. An ultrasound diagnosis apparatus, comprising:

a probe configured to perform an interleaving scan in Doppler groups of ultrasound beam directions so as to acquire first and second Doppler-mode image frames;

a controller coupled to the probe and configured to control the probe to perform the interleaving scan for an initial group of the second Doppler-mode image frame after the interleaving scan for a last group of the first Doppler-mode image frame, wherein the initial group includes fewer ultrasound beam directions than a next group of the ultrasound beam directions for the second Doppler-mode image frame;

a processor coupled to the probe and configured to detect a Doppler-mode signal based on the interleaving scan so as to prepare the first and second Doppler-mode image frames; and

an output unit coupled to the processor and configured to output the prepared first and second Doppler-mode image frames.

21. The apparatus according to claim 20 , wherein the probe stops scanning for a period corresponding to a difference between the numbers of the ultrasound beams in the initial group and the next group after the interleaving scan for the last group of the first Doppler-mode image frame.

22. The apparatus according to claim 20 , wherein the probe scans in a field other than the second Doppler-mode image frame for a period corresponding to a difference between the numbers of the ultrasound beams in the initial group and the next group after the interleaving scan for the last group of the first Doppler-mode image frame.

23. The apparatus according to claim 20 , wherein the second Doppler-mode image frame is acquired next to the first Doppler-mode image frame.

24. The apparatus according to claim 20 , wherein the output unit is a display unit configured to display the first and second Doppler-mode image frames.

25. The apparatus according to claim 20 , wherein the output unit transmits the first and second Doppler-mode image frames through network.

26. The apparatus according to claim 20 , wherein the output unit stores the first and second Doppler-mode image frames in a memory medium.

27. The apparatus according to claim 20 , wherein the processor is further configured to prepare a processed Doppler-mode image frame based on at least the first and second Doppler-mode image frames, and the output unit outputs the processed Doppler-mode image frame as the prepared first Doppler-mode image frame.

28. The apparatus according to claim 27 , wherein the processor prepares the processed Doppler-mode image frame by averaging at least the first and second Doppler-mode image frames.

29. The apparatus according to claim 27 , wherein the processor prepares the processed Doppler-mode image frame by weighting at least the first and second Doppler-mode image frames.

30. The apparatus according to claim 20 , wherein the processor is further configured to perform a B-mode scan in an interval between the interleaving scan in a first Doppler group of the ultrasound beam directions and the interleaving scan in a second Doppler group of the ultrasound beam directions.

31. The apparatus according to claim 20 , wherein the probe is further configured to perform B-mode groups of B-mode scan with at least one ultrasound beam so as to acquire first and second B-mode image frames, the B-mode groups being performed in at least two intervals between the Doppler groups for each of the first and second B-mode image frames; the processor is further configured to detect a B-mode signal based on the B-mode scan so as to prepare the first and second B-mode image frames; the controller is further configured to control the probe so that a first boundary position in the first B-mode image frame originating from one and a next B-mode groups of the B-mode scan differs from a second boundary position in the second B-mode image frame originating from one and a next B-mode groups of the B-mode scan; and the output unit is further configured to output the prepared first and second B-mode image frames.

32. The apparatus according to claim 31 , wherein the second B-mode image frame is acquired next to the first B-mode image frame.

33. The apparatus according to claim 32 , wherein the controller treats a last group of the B-mode scan for the first B-mode image frame and an initial group of the B-mode scan for the second B-mode image frame as one B-mode group of the B-mode scan.

34. The apparatus according to claim 31 , wherein a number of the ultrasound beams in an initial group of the B-mode scan for the second B-mode image frame is fewer than a number of the ultrasound beams in a next group of the B-mode scan for the second B-mode image frame.

35. The apparatus according to claim 34 , wherein the probe stops scanning for a period corresponding to a difference between the numbers of the ultrasound beams in the initial group of the B-mode scan and the next group of the B-mode scan after the B-mode scan for the first B-mode image frame.

36. The apparatus according to claim 34 , wherein the probe scans in a field other than the second B-mode image frame for a period corresponding to a difference between the numbers of the ultrasound beams in the initial group of the B-mode scan and the next group of the B-mode scan after the B-mode scan for the first B-mode image frame.

37. The apparatus according to claim 31 , wherein the processor is further configured to prepare a processed B-mode image frame based on at least the first and second B-mode image frames, and the output unit outputs the processed B-mode image frame as the prepared first B-mode image frame.

38. The apparatus according to claim 37 , wherein the processor prepares the processed B-mode image frame by averaging at least the first and second B-mode image frames.

39. The apparatus according to claim 37 , wherein the processor prepares the processed B-mode image frame by weighting at least the first and second B-mode image frames.

40. An ultrasound diagnosis apparatus, comprising:

a probe configured to perform an alternating scan along a raster in each of plural groups of ultrasound beam directions so as to acquire first and second Doppler-mode image frames;

a controller coupled to the probe and configured to control the probe to perform the alternating scan along a raster for a last group of the ultrasound beam directions for the first Doppler-mode image frame before the alternating scan along a raster for an initial group of the ultrasound beam directions for the second Doppler-mode image frame, wherein the last group includes fewer ultrasound beam directions than a previous group of the ultrasound beam directions for the first Doppler-mode image frame;

a processor coupled to the probe and configured to detect a Doppler-mode signal based on the alternating scan along a raster so as to prepare the first and second Doppler-mode image frames; and

an output unit coupled to the processor and configured to output the prepared first and second Doppler-mode image frames.

41. The apparatus according to claim 40 , wherein the probe stops scanning for a period corresponding to a difference between the numbers of the ultrasound beams in the last group and the previous group before the alternating scan along a raster for the initial group.

42. The apparatus according to claim 40 , wherein the probe scans in a field other than the first Doppler-mode image frame for a period corresponding to a difference between the numbers of the ultrasound beams in the last group and the previous group before the alternating scan along a raster for the initial group.

43. An ultrasound diagnosis apparatus for obtaining first and second Doppler-mode image frames, the apparatus comprising:

an ultrasound generator configured to generate a plurality of ultrasound beams in different directions for each of the first and second Doppler-mode image frames;

a controller coupled to the ultrasound generator and configured to divide the plurality of ultrasound beams into groups, each of a second group to one before a last group of the groups including a first predetermined number N (N≧2) of the ultrasound beams, the last group for the first Doppler-mode image frame including a second predetermined number M (1≦M≦N−1) of the ultrasound beams, an initial group of the groups for the second Doppler-mode image frame including a third predetermined number N−M of the ultrasound beams, wherein the controller is further configured to control the ultrasound generator to repeat the N ultrasound beams more than once in every one of the second group to the one before the last group and in the last and initial groups as one group;

a processor coupled to the ultrasound generator and configured to detect a Doppler-mode signal based on echo signals resulting from the ultrasound beams and to prepare the first and second Doppler-mode image frames based on the detected Doppler-mode signal; and

an output unit coupled to the processor and configured to output the prepared first and second Doppler-mode image frames.

44. A method of ultrasound scanning, comprising:

alternating scanning along a raster in groups of ultrasound beam directions so as to acquire first and second Doppler-mode image frames;

controlling the alternating scanning along a raster to treat a last group of the ultrasound beam directions for the first Doppler-mode image frame and an initial group of the ultrasound beam directions for the second Doppler-mode image frame as one group of the ultrasound beam directions;

detecting a Doppler-mode signal based on the alternating scanning along a raster;

preparing the first and second Doppler-mode image frames based on the detected Doppler-mode signal; and

outputting the prepared first and second Doppler-mode image frames.