Method for automatically generating a background mask for images with noisy background areas, applications to that end and a nuclear magnetic resonance tomography apparatus for carrying out the method

摘要

A method is disclosed for the generation of a background mask from an intensity-value-coded image with a noisy background area. The method includes generating an intensity value histogram of the image; fitting a model curve to a subarea of the intensity value histogram; calculating a threshold value in the intensity value histogram from the fit parameters of the model curve; and generating the background mask starting from at least one defined image area that belongs to the background noise by adding all the pixels whose intensities are below the threshold value to the background mask when connected to the image area via pixels whose intensities are also below the threshold value.