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Abstract

Properties of a medium of food or feed, such as the fat content of meat, are determined by the use of dual X-ray absorptiometry with dual energy levels. Substantially, the entire medium is scanned by X-ray beams, and the X-rays passing through the medium are detected for a plurality of areas (pixels) of the medium. For each area, values A.sub.low and A.sub.high, representing absorption in the area of the medium at low and high energy levels are calculated. A plurality of values being products of the type A.sub.low.sup.n *A.sub.high.sup.m are generated and used for predicting the properties of the medium in this area. Thereby the accuracy of the property determination is improved considerably.

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First Claim