An image processing apparatus including a processing unit configured to processes projection data in which X-ray detection data representing a detection result of parallel beams output from anX-ray source has been converted by projection is provided to form an X-rays image based on the X-Ray detection data.
PROBLEM TO BE SOLVED: To provide an image processing apparatus, an image processing method, and an image processing system, which can achieve a higher quality X-ray image while further reducing the calculation costs for forming an X-ray image.SOLUTION: There is provided an image processing apparatus including a processing unit configured to processes projection data in which X-ray detection data representing a detection result of parallel beams output from an X-ray source has been converted by projection, and form an X-ray image based on the X-ray detection data.