Image acquisition device, image acquisition method, and image correction program

An image acquisition device comprising:

• a first X-ray source that applies X-rays having a first focal point size;
• a first detector that detects X-rays applied from the first X-ray source and having passed through a measured object, wherein the first X-ray source and the first detector are arranged to be fixed on a first straight line passing through the center of a mounting table on which the measured object is mounted;
• a first image generation means that generates a first X-ray CT image, based on the X-rays detected by the first detector;
• a second X-ray source that applies X-rays having a second focal point size smaller than the first focal point size;
• a second detector that detects the X-rays applied from the second X-ray source and having passed through the measured object, wherein the second X-ray source and the second detector are arranged to be fixed on a second straight line passing through the center of the mounting table and intersecting with the first straight line at a predetermined angle;
• a second image generation means that generates a second X-ray CT image, based on the X-rays detected by the second detector;
• and
• an image correction means that corrects the first X-ray CT image generated by the first image generation means, based on the second X-ray CT image generated by the second image generation means, and corrects at least one of the first X-ray CT image generated by the first image generation means and the second X-ray CT image generated by the second image generation means, based on the predetermined angle.

An image acquisition device comprising:

• a first X-ray source that applies X-rays having a first focal point size;
• a first detector that detects X-rays applied from the first X-ray source and having passed through a measured object;
• a first image generation means that generates a first X-ray CT image, based on the X-rays detected by the first detector;
• a second X-ray source that applies X-rays having a second focal point size smaller than the first focal point size;
• a second detector that detects the X-rays applied from the second X-ray source and having passed through the measured object, where the first detector and the second detector are a common detector;
• a mounting table detector moving means that moves a mounting table on which the measured object is mounted and the common detector between a first position where the X-rays applied from the first X-ray source reach and a second position where the X-rays applied from the second X-ray source reach;
• a second image generation means that generates a second X-ray CT image, based on the X-rays detected by the second detector;
• and
• an image correction means that corrects the first X-ray CT image generated by the first image generation means, based on the second X-ray CT image generated by the second image generation means.

An image acquisition method comprising:

• a first detection step of detecting X-rays applied from a first X-ray source, which applies X-rays having a first focal point size, and having passed through a measured object;
• a first image generation step of generating a first X-ray CT image, based on the X-rays detected in the first detection step;
• a second detection step of detecting X-rays applied from a second X-ray source, which applies X-rays having a second focal point size smaller than the first focal point size, and having passed through the measured object;
• a second image generation step of generating a second X-ray CT image, based on the X-rays detected in the second detection step;
• and
• an image correction step of correcting the first X-ray CT image generated in the first image generation step, based on the second X-ray CT image generated in the second image generation step, so that a difference between an edge of the first X-ray CT image generated in the first image generation step and an edge of the second X-ray CT image generated in the second image generation step falls within a predetermined range.