MEDICAL IMAGE DIAGNOSIS APPARATUS, MEDICAL IMAGE PROCESSING APPARATUS AND MEDICAL IMAGE PROCESSING METHOD
A medical image diagnosis apparatus according to an embodiment includes processing circuitry configured to acquire signals from a subject over time, calculate a first similarity representing a similarity of the signals between frames with respect to each of a plurality of frames and a plurality of positions and calculate a second similarity representing a similarity of change of the first similarity over time between the positions, and output the second similarity.
1 . A medical image diagnosis apparatus comprising processing circuitry configured to
acquire signals from a subject over time,
calculate a first similarity representing a similarity of the signals between frames with respect to each of a plurality of frames and a plurality of positions and calculate a second similarity representing a similarity of change of the first similarity over time between the positions, and
output the second similarity.
2 . The medical image diagnosis apparatus according to claim 1 , wherein the processing circuitry is configured to generate a correlation curve representing a change of the first similarity in a frame direction as the change of the first similarity over time and calculates a similarity to the correlation curve of a different position as the second similarity.
3 . The medical image diagnosis apparatus according to claim 1 , wherein the processing circuitry is configured to calculate, as the second similarity, a similarity between the change of the first similarity over time that is calculated with respect to a first position and the change of the first similarity over time that is calculated with respect to a second position that is contained in a given area neighboring to the first position.
4 . The medical image diagnosis apparatus according to claim 3 , wherein the processing circuitry is configured to perform control such that the given area is changeable according to a subject to be analyzed.
5 . The medical image diagnosis apparatus according to claim 1 , wherein the processing circuitry is configured to set an analysis region on which the first similarity is calculated and calculate the first similarity with respect to a position that is contained in the analysis region.
6 . The medical image diagnosis apparatus according to claim 5 , wherein the processing circuitry is configured to perform control such that the analysis region is changeable according to a subject to be analyzed.
7 . The medical image diagnosis apparatus according to claim 1 , wherein the processing circuitry is configured to calculate the first similarity by setting a comparison region corresponding to a plurality of pixels in a corresponding position in each of the frames and comparing the pixels in the comparison region between frames.
8 . The medical image diagnosis apparatus according to claim 7 , wherein the processing circuitry is configured to perform control such that the comparison region is changeable.
9 . The medical image diagnosis apparatus according to claim 1 , wherein the processing circuitry is configured to
calculate the second similarity with respect to each of a plurality of positions and
generate an image representing a distribution of the second similarities and output the image.
10 . The medical image diagnosis apparatus according to claim 1 , wherein the processing circuitry is configured to
calculate the second similarity with respect to each of a plurality of positions and a plurality of frames and
generate an image representing a distribution of the second similarities with respect to each of the frames and output the images.
11 . The medical image diagnosis apparatus according to claim 1 , wherein the processing circuitry is configured to calculate the first similarity with respect to a new frame every time the signals are acquired and calculate the second similarity based on the first similarities that are calculated with respect to a given number of frames from the new frame.
12 . The medical image diagnosis apparatus according to claim 1 , wherein the processing circuitry is configured to calculate the first similarity with respect to a new frame every time the signals are acquired and, every time the first similarities are calculated with respect to a given number of frames, calculate the second similarity based on the first similarities that are calculated with respect to the given number of frames.
13 . The medical image diagnosis apparatus according to claim 11 , wherein the processing circuitry is configured to perform control such that the given number of frames is changeable according to a subject to be analyzed.
14 . A medical image processing apparatus comprising a processing circuitry configured to
calculate a first similarity representing a similarity of signals that are acquired from a subject over time between frames with respect to each of a plurality of frames and a plurality of positions and calculate a second similarity representing a similarity of change of the first similarity over time between the positions, and
output the second similarity.
15 . A medical image processing method comprising:
calculating a first similarity representing a similarity of signals that are acquired from a subject over time between frames with respect to each of a plurality of frames and a plurality of positions and calculate a second similarity representing a similarity of change of the first similarity over time between the positions; and
outputting the second similarity.