Abstract: The invention relates to a method for automatically processing at least one image slice of a given part of at least one lung of a patient suffering from a pathology that causes a bronchial infection by diffuse dilatation of the bronchial tubes of the lungs, the method comprising steps of segmenting (102) the at least one image slice of the given part of the lung, in order to produce a histogram characterising the pulmonary density of the given part of the lunch, by means of the voxels of the at least one image slice, each voxel being assocaited with a given pulmonary density; calculating (104) a threshold, from the histogram, corresponding to a threshold pulmonary density, based on at least one characteristic of the histogram, a first characteristic being the mode of the histogram; determining (106) from the at least one image slice of the given part of the lung, a pulmonary volume having a pulmonnar density higher or lower than the calculatedd threshold, corresponding to the sum of the voxels having a pulmon

Abstract: A method is provided for calculating a region of interest in a second image using an initial region of interest in a first image. The first and second images are linked by a spatial transformation function. The method includes steps of (i) generating a first polygonal mesh enclosing the initial region of interest in the first image; (ii) computing a second polygonal mesh in the second image by applying the spatial transformation function to the first polygonal mesh, and (iii) identifying image elements within the second image, that belong to the area enclosed by the second polygonal mesh. Also provided are a computer program and a system.