The device for detection of reference of the invention comprises several detectors r.. R. it comprises, in addition, the filters reproducing the objects which are the most common point of view of the attenuation of the x-rays. each sensor reference (r.. R) is associated with one of these filters. A value of reference, at a time gives, is obtained by a combination of the values was found at the same time on the various detectors of reference. / p & & p & the invention applies, in particular, to ct multidetector.
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