Beam filter, particularly for x-rays
AssigneeKoninklijke Philips Electronics N. V.
InventorsAxel Thran, Jens-Peter Schlomka
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Abstract
The invention relates to a beam filter (10) that can particularly be used in spectral CT-applications for producing a desired intensity profile of a radiation beam without changing its spectral composition. In a preferred embodiment, the beam filter (10) comprises a stack of absorbing sheets (111) that are separated by wedge-shaped spaces (112) and focused to a radiation source (1). Furthermore, the absorbing sheets have a varying width in direct ion of the radiation. Different fractions of the radiation source (1) area are therefore masked by the beam filter (10) at different points (A, B) on a detector area (2). The absorbing sheets preferably comprise a material that is highly absorbing for the radiation to be filtered.
Claims10
A beam filter for insertion between a radiation source, particularly an X-ray source, and a detection area, comprising at least one absorbing body that masks in its working position different fractions of the radiation emitting area of the radiation source at different points of the detection area.
Dependencies are inferred from the claim text.