Imaging system for imaging an object

An image generation device for generating an image of an object, the image generation device being provided with truncated projections comprising detection signals in at least three energy bins, the truncated projections being acquired from different directions by moving the object and a polychromatic radiation source for emitting polychromatic radiation relatively to each other, the detection signals being obtained depending on the radiation after passing through the object by an energy resolving radiation detector, wherein the image generation device comprises:

• a calculation unit for determining a k-edge component of at least of one of the object and a substance within the object from the truncated projections and for determining non-truncated projections from the determined k-edge component,
• a reconstruction unit for reconstructing the object using the non-truncated projections.

An image generation method for generating an image of an object, the image generating method being provided with truncated projections comprising energy-resolved detection signals in at least three energy bins, the truncated projections being acquired from different directions by moving the object and a polychromatic radiation source for emitting polychromatic radiation relatively to each other, the detection signals being obtained depending on the radiation after passing through the object by an energy resolving radiation detector, wherein the image generation method comprises the steps of:

• determining a k-edge component of at least of one of the object and a substance within the object from the truncated projections,
• determining non-truncated projections from the determined k-edge component by a calculation unit,
• reconstructing the object using the non-truncated projections by a reconstruction unit.