Signal data processing apparatus

1. A signal data processing apparatus comprising processing circuitry,

the processing circuitry comprising:

obtaining first signal data of a plurality of frames that are in time series;

selecting a processing target frame and a reference frame that is similar to the processing target frame from among the plurality of frames; and

inputting first signal data of the processing target frame and first signal data of the reference frame to a machine learning model, and outputting second signal data in which a deficient part of the first signal data corresponding to the processing target frame is reduced.

2. The signal data processing apparatus according to claim 1 , wherein the processing circuitry is configured to select, as the reference frame, a frame that satisfies a predetermined criterion of similarity with respect to the processing target frame.

3. The signal data processing apparatus according to claim 1 , wherein the processing circuitry is configured to:

calculate a difference value of a feature amount of first signal data between the processing target frame and each other frame that is different from the processing target frame; and

select a frame in which the difference value is below a threshold as the reference frame.

4. The signal data processing apparatus according to claim 1 , wherein the processing circuitry is configured to:

obtain output value data of measuring equipment that measures body motion of a subject regarding each of the plurality of frames;

calculate a difference value of a feature amount of the output value data of the measuring equipment between the processing target frame and each other frame that is different from the processing target frame; and

select a frame in which the difference value is below a threshold as the reference frame.

5. The signal data processing apparatus according to claim 1 , further comprising a buffer that stores the obtained first signal data in order for each frame, wherein the processing circuitry is configured to select first signal data of the reference frame from among the first signal data stored in the buffer.

6. The signal data processing apparatus according to claim 1 , further comprising a plurality of buffers that are classified in accordance with a value of a feature amount of the plurality of frames, wherein the processing circuitry is configured to:

store first signal data of each of the plurality of frames in a buffer to which the feature amount of the frame corresponds among the plurality of buffers; and

select the reference frame from among the frames stored in a buffer that matches a buffer in which the processing target frame is stored.

7. The signal data processing apparatus according to claim 1 , wherein the first signal data is medical signal data acquired by a medical image diagnostic apparatus.

8. The signal data processing apparatus according to claim 1 , wherein

the first signal data includes first k-space data that is acquired by a magnetic resonance imaging apparatus, and a first image based on the first k-space data, and

the processing circuitry selects as the reference frame other frames in which the first image is similar to the processing target frame.

9. The signal data processing apparatus according to claim 8 , wherein the processing circuitry is configured to:

input the first k-space data or the first image of the processing target frame, and the first k-space data or the first image of the reference frame to the machine learning model, and output second k-space data or a second image of the processing target frame; or

input the first k-space data of the processing target frame and the first k-space data of the reference frame to the machine learning model, and output the second image of the processing target frame.

10. The signal data processing apparatus according to claim 1 , wherein the processing circuitry is configured to input the first signal data of the processing target frame, the first signal data of the reference frame, and similarity of the reference frame with respect to the processing target frame to the machine learning model, and output second signal data of the processing target frame.

11. The signal data processing apparatus according claim 1 , wherein the processing circuitry is configured to input the first signal data of the processing target frame, the first signal data of the reference frame, and an acquisition time difference between the processing target frame and the reference frame to the machine learning model, and output second signal data of the processing target frame.