1. A method for imaging an object, the method comprising: acquiring a first projection image of the object using a source and a detector, the first projection image comprising a primary image of the object and a scatter image of the object; positioning a scatter rejection plate between the object and the detector; acquiring a second projection image of the object with the scatter rejection plate disposed between the object and the detector, the second projection image comprising the primary image of the object; generating a scatter image of the object based on the first projection image and the second projection image; and storing the scatter image of the object for subsequent imaging.