Abstract: A method and apparatus of comparing the results of medical imaging by, for example, PET scanning dispenses with the need for intensity normalization. The relationships between features extracted from relevant regions of interest in the image are studied. In one example, mean intensities in the principle brain lobes are compared to each other and a short image ID is constructed and used to derive population statistics and diagnosis. The population statistics are compared with ‘reference’ statistics in order to assess abnormality. Comparison by a number of methods is possible, and the invention further provides concerns a novel voting mechanism which derives abnormality scores for each region.

Abstract: A method of processing a radiographic image obtained with a slot-scanning radiographic system to compensate for scattering of the illuminating beam in the tissue being imaged. A conventional circularly symmetric scatter mask, for example a point spread function, is adjusted to take account of the shape of the detector and time delay integration used in the slot scanning system, the presence of an air gap between the detector and the bottom of the tissue being imaged, and the collimation of the radiation beam. The result is a sharpened and shortened point spread function.

Abstract: A method of comparing the results of medical imaging by (e.g.) PET scanning is disclosed which dispenses with the need for intensity normalization. The relationships between features extracted from relevant regions of interest in the image are studied. In one example, mean intensities in the principle brain lobes are compared to each other and a short image ID is constructed and used to derive population statistics and diagnosis. The population statistics can be compared with ‘reference’ statistics in order to assess abnormality. Comparison by a number of methods is possible and a further feature of the invention concerns a novel voting mechanism which derives abnormality scores for each region.

Abstract: Comparing first and second images taken on different imaging systems and under different exposure conditions is achieved by the steps of: applying a model to the data representing the first image, which model simulates at least one process step in the creation of said first image, to derive a representation of the first image at a level of processing common to the creation of the second image; and applying a further model to said representation, which model simulates at least one process step in the creation of said second image, to derive a further representation of the first image which corresponds to the same level of processing as said second image.

Abstract: A method of processing a radiographic image obtained with a slot-scanning radiographic system to compensate for scattering of the illuminating beam in the tissue being imaged. A conventional circularly symmetric scatter mask, for example a point spread function, is adjusted to take account of the shape of the detector and 1o time delay integration used in the slot scanning system, the presence of an air gap between the detector and the bottom of the tissue being imaged, and the collimation of the radiation beam. The result is a sharpened and shortened point spread function.

Abstract: Comparing first and second images taken on different imaging systems and under different exposure conditions is achieved by the steps of: