Adaptive bowtie x-ray filter for changing local intensity of x-ray radiation, has pump unit that controls amount of liquid in such manner that geometric form of absorbed volume of bowtie x-ray filter is adjustable

The adaptive bowtie x-ray filter (9) has multiple chambers (12) which are arranged perpendicularly over one another for directing the x-ray radiation. The chambers are filled with liquid independent of one another by a pump unit. The liquid absorbs the x-ray radiation. The pump unit controls the amount of the liquid in such a manner that the geometric form of an absorbed volume of the bowtie x-ray filter is adjustable. Openings (11) are formed in the chamber, through which the inflow and outflow of the liquid is allowed. An independent claim is included for a method for changing the local intensity of the x-ray radiation. Die Erfindung beansprucht ein adaptives Bow-Tie-Röntgenfilter (9) mit einer eine Röntgenstrahlung (2) absorbierenden Flüssigkeit zur Veränderung der lokalen Intensität der Röntgenstrahlung (2). Das adaptive Bow-Tie-Röntgenfilter (9) umfasst mindestens eine Pumpeinheit, durch die die Menge der Flüssigkeit derart steuerbar ist, dass die geometrische Form eines absorbierenden Volumens (12, 13) des adaptiven Bow-Tie-Röntgenfilters (9) einstellbar ist. Die Erfindung bietet den Vorteil, dass das Strahlungsfeld der Röntgenstrahlung (2) einfach, präzise und schnell moduliert werden kann.