| abstract |
The present invention relates to an indirect radiation detector for detecting radiation (X), e.g. for medical imaging systems. The detector has an array of pixels (P 1 -P 6 ), each pixel (P) being sub-divided into at least a first and a second sub-pixel (PE 1 , PE 2 ). Each sub-pixel has a cross-sectional area (A 1 , A 2 ) parallel to a surface plane ( 60 ) of the array. The cross-sectional area (A 1 ) of the first sub-pixel (PE 1 ) is different, e.g. smaller, from the cross-sectional area (A 2 ) of the second sub-pixel (PE 2 ) to provide a dynamic range of detectable flux densities. Additionally, the first sub-pixel (PE 1 ) has a photosensitive device (PS 1 ) arranged on a side of the sub-pixel, said side being substantially orthogonal to said surface plane of the array of pixels to provide a good optical coupling. The detector allows high-flux photon counting with a relatively simple detector design. |