Method and system for image analysis

摘要

A computer-implemented method for analyzing a sample comprising a first material and a second material of generally different densities and having a junction therebetween. The method comprises: defining automatically a plurality of regions of interest within an image of the sample, each of said regions of interest having a width of one or more voxels or pixels; determining respective density, intensity or attenuation profiles within the regions of interest; determining a location of said junction including defining a first reference point within one of said first and second materials and employing the first reference point as current reference point, and (i) determining a closest point to said current reference point that is on said respective profile and in the other of said first and second materials to that of the current reference point; (ii) locating a greatest difference in values of the respective profile between an adjacent peak and trough in a segment of the respective profile between said current reference point and said closest point; and (iii) locating a point of inflexion in said segment.

主权项

1. A computer-implemented method for analysing a sample comprising a first material and a second material of generally different densities and having a junction therebetween, the method comprising:
defining automatically at least one region of interest within an image of the sample, said region of interest having a width of one or more voxels or pixels; determining a density, intensity or attenuation profile within the region of interest; determining a location of said junction within the image including defining a first reference point in the density, intensity or attenuation profile corresponding to said first material and employing the first reference point as a current reference point, and
(i) determining a closest point to said current reference point that is in said density, intensity or attenuation profile and corresponding to the other of said first and second materials to that of the current reference point;(ii) determining for each peak in a segment of the density, intensity or attenuation profile between the current reference point and the closest point a difference between the value of the peak and a trough adjacent to the peak;(iii) determining a greatest of said differences; and(iv) locating a point of inflexion in the density, intensity or attenuation profile between the peak and the trough between which is said greatest of said differences.