Patent · US Active

Beam filter, particularly for x-rays

US8031840B2 · kind B2 · utility

2Cited by

3References

20Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Axel Thran · Hamburg, DE
Jens-Peter Schlomka · Hamburg, DE

Key dates

Filing date	Nov 30, 2007
Grant date	Oct 4, 2011
Priority date	—
Expiry date	Jan 25, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG21K1/10
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.