Antinuclear antibody image analysis system, antinuclear antibody image analysis method, and antinuclear antibody image analysis program

1. An antinuclear antibody image analysis system comprising:

a hardware including a processor

a luminance calculation unit, implemented at least by the hardware, which calculates luminance of a cell nucleus extracted from an antinuclear antibody image of a designated dilution ratio; and

a titer prediction unit, implemented at least by the hardware, which predicts an antinuclear antibody titer, using a staining pattern specified from a staining form of the cell nucleus and the luminance at at least one dilution ratio, and

wherein the titer prediction unit predicts the antinuclear antibody titer for each of one or more staining patterns specified from one antinuclear antibody image.

2. The antinuclear antibody image analysis system according to claim 1 , wherein the titer prediction unit predicts the antinuclear antibody titer by calculating, based on the specified staining pattern and the calculated luminance at a specific dilution ratio, a titer prediction curve representing a relationship between each dilution ratio and luminance, and specifying, from the titer prediction curve, a dilution ratio at which luminance is below a threshold preset depending on the staining pattern.

3. The antinuclear antibody image analysis system according to claim 2 , wherein the titer prediction unit predicts, as the antinuclear antibody titer, a maximum dilution ratio from among all dilution ratios that are lower than the specified dilution ratio and are used to determine the titer.

4. The antinuclear antibody image analysis system according to claim 1 , wherein the luminance calculation unit calculates an average value of a predetermined color from each cell nucleus, and sets, as the luminance, an average value of the color of the whole image calculated using the calculated average value of each cell nucleus.

5. An antinuclear antibody image analysis method comprising:

calculating luminance of a cell nucleus extracted from an antinuclear antibody image of a designated dilution ratio;

predicting an antinuclear antibody titer, using a staining pattern specified from a staining form of the cell nucleus and the luminance at at least one dilution ratio; and

predicting the antinuclear antibody titer for each of one or more staining patterns specified from one antinuclear antibody image.

6. The antinuclear antibody image analysis method according to claim 5 , wherein the antinuclear antibody titer is predicted by calculating, based on the specified staining pattern and the calculated luminance at a specific dilution ratio, a titer prediction curve representing a relationship between each dilution ratio and luminance, and specifying, from the titer prediction curve, a dilution ratio at which luminance is below a threshold preset depending on the staining pattern.

7. A non-transitory computer readable information recording medium storing an antinuclear antibody image analysis program, when executed by a processor, that performs a method for:

calculating luminance of a cell nucleus extracted from an antinuclear antibody image of a designated dilution ratio;

predicting an antinuclear antibody titer, using a staining pattern specified from a staining form of the cell nucleus and the luminance at at least one dilution ratio; and

predicting the antinuclear antibody titer for each of one or more staining patterns specified from one antinuclear antibody image.

8. The non-transitory computer readable information recording medium according to claim 7 , the antinuclear antibody titer is predicted by calculating, based on the specified staining pattern and the calculated luminance at a specific dilution ratio, a titer prediction curve representing a relationship between each dilution ratio and luminance, and specifying, from the titer prediction curve, a dilution ratio at which luminance is below a threshold preset depending on the staining pattern.