| 摘要 |
In a dose modulation method, transmission tomographic imaging data of an associated imaging subject are acquired using a radiation source ( 14 ) revolving around the associated imaging subject. During the tomographic imaging, an estimated attenuation of radiation is determined for an upcoming position or angular bin ( 721, 82 ) of the revolving radiation source based on attenuations determined at previously acquired positions or angular bins ( 701, 84, 90 ) of the radiation source. Prior to acquiring tomographic imaging data at the upcoming position or angular bin, a level of radiation produced by the radiation source is adjusted based on the estimated attenuation of radiation.
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