Ultrasound diagnosis apparatus

1. An ultrasound diagnosis apparatus comprising:

Doppler processing circuitry configured to filter a data sequence of reflected-wave data at same positions across a plurality of frames to collect blood flow information in a predetermined region of interest; and

processing circuitry configured to

determine a first transmission and reception time required to transmit and receive ultrasound for a scanning line in an ultrasound scan performed to acquire the reflected-wave data in the predetermined region of interest,

receive a first instruction to change a range of flow rate values to be displayed, in display of the blood flow information,

determine a second transmission and reception time for the scanning line based on the range of flow rate values changed by the first instruction,

receive a second instruction to change a setting related to the predetermined region of interest,

when receiving the first instruction, change the range of flow rate values in response to the first instruction,

when receiving the second instruction, perform a comparison of the first transmission and reception time for the scanning line with the second transmission and reception time for the scanning line, the first transmission and reception time being based on scan conditions other than the range of flow rate values changed by the first instruction, and

perform, based on a result of the comparison, an adjustment of at least one parameter included in the scan conditions for maintaining the range of flow rate values changed by the first instruction, even if the second instruction is an instruction to increase the range of flow rate values.

2. The ultrasound diagnosis apparatus according to claim 1 , wherein

the processing circuitry maintains parameters other than transmission and reception time included in the scan conditions when the second transmission and reception time is larger than the first transmission and reception time and reduces a number of scanning lines when the second transmission and reception time is smaller than the first transmission and reception time, and the number of scanning lines is a parameter included in the scan conditions, and

the Doppler processing circuitry collects the blood flow information under the scan conditions adjusted by the processing circuitry.

3. The ultrasound diagnosis apparatus according to claim 2 , wherein the processing circuitry maintains a length of the predetermined region of interest in an azimuthal direction for collecting the blood flow information and reduces the number of scanning lines when the second transmission and reception time is smaller than the first transmission and reception time.

4. The ultrasound diagnosis apparatus according to claim 2 , wherein the processing circuitry shortens a length of the predetermined region of interest in an azimuthal direction for collecting the blood flow information and reduces the number of scanning lines when the second transmission and reception time is smaller than the first transmission and reception time.

5. The ultrasound diagnosis apparatus according to claim 2 , wherein the processing circuitry reduces the number of scanning lines when the second transmission and reception time is smaller than the first transmission and reception time and gives a warning when the reduced number of scanning lines is equal to or less than a predetermined number.

6. An ultrasound diagnosis apparatus comprising:

Doppler processing circuitry configured to filter a data sequence of reflected-wave data at same positions across a plurality of frames to collect blood flow information; and

processing circuitry configured to

determine a first transmission and reception time required to transmit and receive ultrasound for a scanning line in an ultrasound scan performed to acquire the reflected-wave data,

receive a first instruction to change a range of flow rate values to be displayed, in display of the blood flow information,

determine a second transmission and reception time for the scanning line based on the range of flow rate values changed by the first instruction,

receive a second instruction to change a parameter included in conditions for collecting the blood flow information,

give a warning when the first instruction is an instruction to increase an upper limit of the range of flow rate values,

lower the upper limit of the range of flow rate values when the first instruction is an instruction to lower the upper limit of the range of flow rate values,

when receiving the second instruction, perform a comparison of the first transmission and reception time for the scanning line with the second transmission and reception time for the scanning line, the first transmission and reception time being based on scan conditions other than the range of flow rate values changed by the first instruction, and

perform, based on a result of the comparison, an adjustment of at least one parameter included in the scan conditions for maintaining the range of flow rate values having the upper limit lowered by the first instruction, even if the second instruction is an instruction to increase the range of flow rate values.

7. The ultrasound diagnosis apparatus according to claim 6 , wherein

the Doppler processing circuitry collects the blood flow information in a predetermined region of interest, and

the processing circuitry receives, as the second instruction, an instruction to change a setting related to the predetermined region of interest.