Method and device for measuring pulmonary nodule volume using dual-energy substraction image

A device for measuring a pulmonary nodule volume using a dual-energy subtraction image, the device comprising:

• a dual-energy subtraction image obtaining unit obtaining a dual-energy subtraction image of a chest;
• a specific region setting unit setting a specific region comprising a pulmonary nodule region in the obtained dual-energy subtraction image;
• a pulmonary nodule region interpolating unit interpolating a gray level trend of a region surrounding the pulmonary nodule region in the specific region into the pulmonary nodule region using a fitting function;
• and
• an interpolation result subtraction and pulmonary nodule volume measurement unit measuring a pulmonary nodule volume by subtracting the interpolation result from gray level data of the pulmonary nodule region,
• wherein the pulmonary module region interpolating unit:
• finds the borders of the pulmonary nodule region in the specific region;
• selects the fitting function for interpolating the gray level trend of the region surrounding the pulmonary nodule region into the pulmonary nodule region and fitting the gray level data;
• and
• corrects the border according to the deviation of the fitting result at the border from the gray level,
• wherein, in correcting the border, when the deviation of the fitting result at the bordering point from the gray level is greater than a first predetermined value, the bordering point moves away from the center of the pulmonary nodule by one or more pixels, and when the deviation is less than a second predetermined value, the bordering point moves toward the center of the pulmonary nodule by one or more pixels.