Patent ID: 6021173
Filing Date: 2000-02-01
Classification: H01L

Abstract:
An x-ray detector for detecting an incident x-ray image produced in an x-ray examination apparatus, the x-ray detector comprising:a planar scatter grid including a regular array of x-ray attenuating partitions,a plurality of sensor elements arranged in a planar matrix, the scatter grid being positioned over the sensor matrix for substantially blocking scattered x-rays from reaching the sensor elements, the sensor elements further comprisinga continuous x-ray sensitive layer for converting incident x-rays into electric charges, anda plurality of switching elements for deriving an image signal from the electric charges, andwherein the x-ray sensitive layer causes sufficient lateral spreading of the electric charges to reduce the spatial resolution of the sensor matrix such that the size of the smallest detectable detail in an x-ray image is larger than the distance between adjacent partitions in the scatter grid,whereby Moire-like perturbations due to the scatter grid are substantially avoided.