| 摘要 |
In a method for operating a computed tomography apparatus for scanning a subject, a characteristic value is determined only from the attenuation values of selected detector elements of a detector on which x-rays are incident that penetrated the examination region of the subject. An adjustment value for adjustment of the intensity of the x-ray radiation is calculated for the following projection from at least one such determined characteristic value. The intensity of the x-ray radiation is adjusted for a following projection dependent to the calculated adjustment value. The method prevents image artifacts (in particular over-exposed or under-exposed image regions) in a resulting image calculated from the attenuation values, such as in a calculated slice or volume image of an examination region.
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