Patent ID: 9045097
Filing Date: 2015-06-02
Classification: A61B,B60K,B60R,B60W,B60Y,G01T,G06T,Y02T

Abstract:
1. A two-dimensional position map correcting method used when detecting radiation with radiation detectors each formed of a plurality of scintillator elements arranged in one dimension, two dimensions or three dimensions, and a light sensor optically coupled thereto, for preparing a look-up table from a two-dimensional position map presenting, in two dimensions, signal strengths obtained with the light sensor as corresponding to incident positions of the radiation incident on the scintillator elements, the two-dimensional position map correcting method comprising: a histogram preparing step for acquiring a histogram by preparing the histogram with a vertical axis representing signal strengths of the two-dimensional position map and with a horizontal axis being in a coordinate axis direction of the two-dimensional position map; and a map determining step for applying a map determination condition using amounts of characteristic extracted from grid shapes delimited vertically and horizontally on the two-dimensional position map, to areas delimited by delimiting points based on the histogram acquired in the histogram preparing step, the map determining step being repeated until the map determination condition is satisfied, by changing the areas delimited by the delimiting points, wherein the map determining step is repeated by applying the map determination condition to the areas delimited by the delimiting points, and changing the areas delimited by the delimiting points in the order of large total of the signal strengths until the map determination condition is satisfied.