Patent ID: 9230322
Filing Date: 2016-01-05
CPC Classification: A61N,G06T

Claim Text:
1. An image processor comprising processing circuitry configured to at least: acquire a plurality of first perspective images, which have been captured from a target in at least two mutually different directions; generate from volume data of the target a plurality of second perspective images in the at least two mutually different directions; acquire a first plurality of points in one of the first perspective images and the second perspective images; detect a second plurality of points in the second perspective images corresponding to the first plurality of points if the first plurality of points is present in the first perspective images, and detect a second plurality of points in the first perspective images corresponding to the first plurality of points if the first plurality of points is present in the second perspective images; calculate based on at least the first plurality of points and the second plurality of points, a difference in position of the target between when the first perspective images were captured and when the second perspective images were generated; and determine whether or not the difference is in a range, wherein the processing circuitry is configured to, if the difference is not in the range, generate updated ones of the second perspective images from an updated one of the volume data, which is different by the difference from a previous one of the volume data, wherein the processing circuitry is configured to, if the difference is not in the range, detect an updated one of the second plurality of points in one of the first perspective images and the updated ones of the second perspective images, and wherein the processing circuitry is configured to, if the difference is not in the range, calculate the difference based on at least the first plurality of points and the updated one of the second plurality of points.