Ultrasonic diagnostic apparatus and probe pressurization/depressurization information display method

1. An ultrasonic diagnostic apparatus, comprising:

an ultrasonic probe;

transmission/reception circuitry configured to transmit an ultrasonic wave to an object and receive a reflected wave from the object as an echo signal via the ultrasonic probe;

velocity distribution information generation circuitry configured to generate, based on the echo signal, velocity distribution information of a tissue in the object in accordance with an operation of pressurization or depressurization using the ultrasonic probe by an operator;

index information generation circuitry configured to generate state information representing a cycle of the pressurization or the depressurization of the operation and target information representing a target cycle of the pressurization or the depressurization of the operation, based on the velocity distribution information; and

a display configured to display the cycle in the form of a length of a second side in a predetermined graphic pattern representing the state information and the target information, the graphic pattern including a first side and the second side, display the state information and the target information as the graphic pattern, and display the graphic pattern upon changing the length of the second side of the graphic pattern in accordance with a change in the cycle of the pressurization or the depressurization in the state information.

2. The ultrasonic diagnostic apparatus of claim 1 , wherein the index information generation circuitry is further configured to generate the state information, which further includes information indicating a degree of the pressurization or the depressurization of the operation, and generate the target information, which further includes information indicating a target degree that is a target value of the degree of the pressurization or the depressurization, and

the display displays the degree in the form of a length of the first side, displays the state information and the target information in the graphic pattern, and displays the graphic pattern upon changing the length of the first side of the graphic pattern in accordance with a change in the degree of the pressurization or the depressurization in the state information.

3. The ultrasonic diagnostic apparatus of claim 2 , wherein the predetermined graphic pattern comprises a rectangle including the first side and the second side.

4. The ultrasonic diagnostic apparatus of claim 3 , wherein the degree in the state information and the degree in the target information are determined from a displacement, a velocity, a strain, or a strain ratio of the tissue.

5. The ultrasonic diagnostic apparatus of claim 3 , wherein the display displays the degree in the state information in the form of the length of the first side of the rectangle, and

displays the cycle in the state information in the form of the length of the second side of the rectangle, which is perpendicular to the first side.

6. The ultrasonic diagnostic apparatus of claim 3 , wherein the display displays the rectangle upon changing unit length scales of two sides of the rectangle that are perpendicular to each other, in accordance with a type of the ultrasonic probe or a diagnosis target region in the object.

7. The ultrasonic diagnostic apparatus of claim 2 , further comprising image generation circuitry configured to generate an image based on the echo signal,

wherein when a mode of displaying a plurality of images belonging to a predetermined period including a generation time point of the image is set, the index information generation circuitry is further configured to generate the state information based on the velocity distribution information in the predetermined period.

8. The ultrasonic diagnostic apparatus of claim 2 , wherein the display displays the state information and the target information as the graphic pattern or as numerical values to be compared with each other.

9. The ultrasonic diagnostic apparatus of claim 2 , further comprising waveform generation circuitry configured to generate a waveform representing a temporal change in the degree in the state information based on the velocity distribution information,

wherein the display further displays the waveform.

10. The ultrasonic diagnostic apparatus of claim 2 , wherein the index information generation circuitry is further configured to determine whether the degree and the cycle in the state information are proper by comparing the state information with the target information, and

the display displays a determination result obtained by the index information generation circuitry.

11. The ultrasonic diagnostic apparatus of claim 2 , wherein the index information generation circuitry is further configured to generate cycle instruction information for bringing the cycle in the state information close to the cycle in the target information, based on a difference value between the cycle in the state information and the cycle in the target information, and generate degree instruction information for bringing the degree in the state information close to the degree in the target information, based on a difference value between the degree in the state information and the degree in the target information, and

the display displays character strings concerning the cycle instruction information and the degree instruction information as one sentence in a display area different from the display areas of an image concerning the echo signal and the graphic pattern.