Image generating apparatus, imaging system including image generating apparatus and operating method of imaging system

An imaging system comprising:

• a light illuminator configured to illuminate light onto a subject from a light source;
• an optical detector configured to acquire a two-dimensional projection image on the subject;
• and
• an image generation device configured to generate a three-dimensional volume image on the subject on a basis of the projection image,
• wherein the image generation device comprises:
• a projection matrix generation module configured to generate a first projection matrix between three-dimensional coordinates of the subject and two-dimensional coordinates of the projection image;
• a volume image generation module configured to generate a three-dimensional first volume image on the subject on a basis of the first projection matrix and the projection image;
• a DRR generation module configured to generate a two-dimensional DRR on the subject from the first volume image;
• and
• a projection matrix updating module configured to match the projection image and the DRR, and update the first projection matrix on a basis of a matched result to generate a second projection matrix,
• wherein the volume image generation module further generates a three-dimensional second volume image on the subject on a basis of the second projection matrix and the projection image.

An image generation device, which generates a three-dimensional volume image on a subject from a two-dimensional projection image acquired by illuminating light onto the subject, the image generation device comprising:

• a processor;
• and
• a memory connected to the processor,
• wherein the memory stores commands, and when the commands are executed by the processor, the commands cause the processor to:
• generate a first projection matrix between three-dimensional coordinates of the subject and two-dimensional coordinates of the projection image;
• generate a three-dimensional first volume image on the subject on a basis of the first projection matrix and the projection image;
• generate a two-dimensional DRR on the subject from the first volume image;
• match the projection image and the DRR, and update the first projection matrix on a basis of a matched result to generate a second projection matrix;
• and
• generate a three-dimensional second volume image on the subject on a basis of the second projection matrix and the projection image.