Patent ID: 7570736

Claim:
An imaging system comprising: a radiographic energy source configured to emit a flux of x-rays that exceeds a first saturation threshold; a detector comprising: a stacked arrangement of a first direct conversion layer and a second direct conversion layer; the first direct conversion layer having a first array of electrical contacts and constructed to directly convert radiographic energy to electrical signals representative of energy sensitive radiographic data, and having a saturation threshold; and the second direct conversion layer having a second array of electrical contacts and constructed to directly convert radiographic energy to electrical signals representative of energy sensitive radiographic data, and having a saturation threshold different from the saturation threshold of the first direct conversion layer; wherein the first direct conversion layer is situated between the radiographic energy source and the second direct conversion layer; and a controller configured to correct saturated data in one of the first and second direct conversion layers using unsaturated data acquired from the other of the first and second direct conversion layer.