ULTRASOUND DIAGNOSTIC DEVICE

1 . An ultrasound diagnostic device, comprising processing circuitry configured to

acquire reflection ultrasound data from a mobile object;

extract velocity information of the mobile object by applying a first filter to the reflection ultrasound data;

determine a probability that the mobile object is a blood flow based on the reflection ultrasound data and output probability information; and

generate a blood flow image based on the extracted velocity information of the mobile object and the outputted probability information.

2 . The ultrasound diagnostic device according to claim 1 , wherein

the processing circuitry is further configured to

extract intensity information of the mobile object by applying a second filter to the reflection ultrasound data; and

determine a probability that the mobile object is the blood flow based on the intensity information.

3 . The ultrasound diagnostic device according to claim 2 , wherein

the processing circuitry is further configured to determine that the higher the intensity indicated by the intensity information is, the higher the probability of being the blood flow is.

4 . The ultrasound diagnostic device according to claim 1 , wherein

the processing circuitry is further configured to generate the blood flow image so that the higher the probability of being the blood flow is, the higher the brightness is, and the lower the probability of being the blood flow is, the lower the brightness is.

5 . The ultrasound diagnostic device according to claim 4 , wherein

the processing circuitry is further configured not to express a difference in velocity in the velocity information of the mobile object in terms of a difference in brightness.

6 . The ultrasound diagnostic device according to claim 5 , wherein

the processing circuitry is further configured to generate the blood flow image using a color map in which a first axis indicates the probability of being the blood flow and a second axis indicates the velocity of the mobile object.

7 . The ultrasound diagnostic device according to claim 6 , wherein

the processing circuitry is further configured to extract direction information in addition to the velocity information of the mobile object by applying the first filter to the reflection ultrasound data.

8 . The ultrasound diagnostic device according to claim 7 , wherein

in the color map, a first color is assigned to the mobile object moving in a direction approaching an ultrasound probe, a second color is assigned to the mobile object moving in a direction receding from the ultrasound probe, a third color is assigned to the mobile object of which a velocity of movement is zero, and a color scheme is adopted such that the first color, the second color, and the third color gradually change based on a probability of being a blood flow and the velocity of the mobile object.

9 . The ultrasound diagnostic device according to claim 7 , wherein

in the color map, the first color is assigned to the mobile object of which a velocity of movement is zero, the second color is respectively assigned to maximum values on the color map related to the velocity of the mobile object moving in a direction approaching an ultrasound probe and the velocity of the mobile object moving in a direction receding from the ultrasound probe, and a color scheme is adopted such that a color changes to the second color via the third color as the velocity of the mobile object increases in the direction approaching the ultrasound probe and a color changes to the second color via a fourth color as the velocity of the mobile object increases in the direction receding from the ultrasound probe.

10 . The ultrasound diagnostic device according to claim 2 , wherein

the first filter is a fixed-length wall filter in a Doppler frequency space, and

the second filter is an eigenvalue expansion-type wall filter.