Device for determining the radiation absorption distribution in a three-dimensional examination zone

In a device for determining a radiation absorption distribution in a three-dimensional examination zone comprising:

• radiation sources which are situated in one plane and which irradiate the examination zone from different directions;
• detectors which detect the radiation which has passed through the examination zone and supply sets of output signals which are characteristic of the absorption of the radiation;
• and an arithmetic device which reconstructs the radiation absorption distribution on the basis of the output signals, the improvement wherein the radiation sources are arranged in a radiation source plane which is equidistant from an axis of rotation, the axis of rotation extending transversely to a first plane and a second plane, situated at a distance from and parallel to each other, the radiation sources being adjacently situated parallel to and rotatable around the axis of rotation and the detectors comprise at least two detector arrays which extend transversely to the axis of rotation and which consist of separate, adjacently situated detectors, said detector arrays being arranged in the said two planes, diametrically opposite the radiation sources with respect to the axis of rotation.