Patent ID: 6718195
Filing Date: 2004-04-06
Classification: A61B,G01N

Abstract:
A method of localizing a deviant region in a turbid medium that is represented by a set of volume elements, which method includesa first measuring step (1) in which the turbid medium is irradiated by means of light comprising radiation of mainly a first wavelength and in which intensities of a part of the light comprising radiation of mainly the first wavelength that is transported along a plurality of light paths through the turbid medium are measured, and an imaging step (4) for reconstructing an image (9) of the turbid medium from the measured intensities, characterized in that the method also includes at least a second measuring step (2) in which the turbid medium is irradiated by means of light comprising radiation of mainly a second wavelength which is not equal to the first wavelength, and in which intensities of a part of the light comprising radiation of mainly the second wavelength that is transported along a plurality of light paths through the turbid medium are measured, and that the imaging step (4) includes the following steps: a first calculation step (6) in which a value is assigned to at least a first parameter in dependence on the intensities measured for a volume element in the measuring steps, said first parameter representing a property of the turbid medium, a second calculation step (7) in which a significance value is assigned to the volume element in dependence on the value of at least the first parameter, a display step (8) for displaying in the image of the turbid medium (9) for a point in the image that corresponds to one of the volume elements, the significance value (10) of the corresponding volume element.