| 摘要 |
<heading lvl="0">Abstract of Disclosure</heading> In a method and the arrangement for determining projection data for a projection of a spatially variable area, change data are determined in a first computing unit, where the change data describe a change in the spatially variable area from a starting state to an end state. The change data are transmitted to a second computing unit and to a third computing unit, which are each connected to the first computing unit. First current projection data for a first projection of the spatially variable area are determined in the second computing unit using the change data and first previously stored projection data. Second current projection data for a second projection of the spatially variable area are determined in the third computing unit using the change data and second previously stored projection data.
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