Patent ID: 9675818
Date: 2017-06-13
CPC Classifications: A61B,A61N

Claim:
1. An apparatus for medical image-based radiotherapy planning, comprising: a processor; and a memory configured to store processor-executable instructions which, when executed by the processor, cause the processor to at least: receive a first perspective image and a second perspective image, obtained by photographing an object from different directions; acquire positional information of a specified point on the first perspective image; search, in a searching range including an epipolar line on the second perspective image, for a candidate point based on a Haar-like characteristic amount, the candidate point corresponding to the specified point, the epipolar line corresponding to the specified point; calculate the Haar-like characteristic amount of a given point in the searching range by rotating a Haar-like characteristic calculation window having a center at a given position in accordance with an inclination of the epipolar line; and generate a first enlarged image by enlarging a part of the first perspective image neighboring the specified point, a second enlarged image by enlarging a part of the second perspective image neighboring the candidate point, and a differential image indicating differences between luminance values of pixels in the first enlarged image and luminance values of pixels in the second enlarged image.