Radiation irradiating system and moving object tracking system

A radiation irradiating system comprising:

• a radiation irradiating device configured to generate a radiation;
• and
• two or more pairs of X-ray fluoroscopic devices including a first X-ray fluoroscopic device and a second X-ray fluoroscopic device and configured to capture fluoroscopic images of a tracking target, each pair including one X-ray measuring device and one X-ray generator;
• wherein the radiation irradiating device is controlled to detect a position of the tracking target from a first fluoroscopic image captured by the first X-ray fluoroscopic device and a second fluoroscopic image captured by the second X-ray fluoroscopic device,
• wherein values indicating an accuracy of detection of a plurality of candidates of a position of the tracking target from each of the first and second fluoroscopic images and values representing a correlation between the positions of the candidates in the first fluoroscopic image and the positions of the candidates in the second fluoroscopic image are calculated, wherein calculations are performed for a plurality of pairs of candidates from the first and second fluoroscopic images by applying weights to the values indicating the accuracy of detection of each candidate and to the values representing the correlation between the positions of the candidates to generate a plurality of results, wherein a pair of candidates is selected from the plurality of pairs of candidates based on the plurality of results and the position of the tracking target is detected from the selected pair of candidates, and the radiation is controlled to be irradiated onto the target based on the detected position of the tracking target, and
• wherein each of the values representing the correlation is a distance between two or more lines that do not intersect each other and that are connecting the positions on the X-ray measuring devices corresponding to the positions of the plurality of candidates on the first and second fluoroscopic images and the X-ray generators, the distance being on a common axis.

A moving object tracking system comprising:

• two or more pairs of X-ray fluoroscopic devices including a first X-ray fluoroscopic device and a second X-ray fluoroscopic device and configured to capture fluoroscopic images of a tracking target, each pair including one X-ray measuring device and one X-ray generator,
• wherein the moving object tracking system is configured to detect a position of the tracking target from a first fluoroscopic image photographed by the first X-ray fluoroscope device and a second fluoroscopic image photographed by the second X-ray fluoroscopic device, wherein
• the moving object tracking system is configured to acquire a value representing an accuracy of detection of a candidate for the position of the tracking target from each of the first and second fluoroscopic images and values representing a correlation of the positions of the plurality of candidates in the first fluoroscopic image and the positions of the plurality of candidates in the second fluoroscopic image respectively acquired by the two or more X-ray fluoroscopic devices, wherein calculations are performed for a plurality of pairs of candidates from the first and second fluoroscopic images by applying weights to the values indicating the accuracy of detection of each candidate and to the values representing the correlation between the positions of the candidates to generate a plurality of results, wherein a pair of candidates is selected from the plurality of pairs of candidates based on the plurality of results and the position of the tracking target is detected from the selected pair of candidates,
• wherein each of the values representing the correlation is a length of a common vertical line that corresponds to the shortest distance between at least two lines that do not intersect each other and that are connecting the positions on the X-ray measuring devices corresponding to the position of the plurality of candidates on the first and second fluoroscopic images to the X-ray generators.