| 摘要 |
The invention relates to a device for adjusting imaging parameters of an X-ray apparatus ( 1 ), whereby a user pre-defines on a preliminary image an image region of interest (ROI) and a value of the contrast-to-noise ratio (CNR<SUB>ref</SUB>) desired for this image region. Based on the current contrast-to-noise ratio (CNR<SUB>m</SUB>), new imaging parameters (I, V, L, f, Q<SUB>0</SUB>) are then calculated for a generator-control module ( 7 ) to control the X-ray apparatus ( 1 ) during an image. By means of the method, the X-ray dose may be reduced to a minimum, while at the same time the desired visibility of a region of interest is ensured.
|
