Patent ID: 8433036
Filing Date: 2013-04-30
Classification: G01V

Abstract:
1. A scanning method for scanning an object moving in a first direction comprising: irradiating the object with radiation having a peak energy of at least 900 keV; providing a first detector region having a thickness of at least 2 mm and a second detector region having a thickness of at least 5 mm wherein the second detector region is arranged to receive radiation that has passed through the first detector region; detecting the radiation after it has interacted with or passed through the object in order to provide information relating to the object; wherein detecting the radiation comprises: wherein at the first detector region, the second detector region, or both, detecting the radiation comprises capturing a plurality of sets of detection data using different groups of detection elements; each detection element being arranged to provide information relating to a corresponding portion of the object; each set of detection data being captured at a different time such that each group of detection elements is arranged to provide information on the same region of the object; and wherein the corresponding portions covered by each group are overlapped in a second direction having a component normal to the first direction.