Scanning systems
First Claim
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1. A scanning method for scanning an object moving in a first direction comprising:
- irradiating the object with radiation;
providing a first detector region and a second detector region 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 capturing a plurality of sets of detection data using different groups of detection elements for providing information relating to a corresponding portion of the object, andwherein each set of detection data is captured at a different time such that each group of detection elements is arranged to provide information on the same portion 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.
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Abstract
The invention provides methods, systems and detector arrangements for scanning an object moving in a first direction that includes the steps of 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 where the second detector region is arranged to receive radiation that has passed through the first detector region, and detecting the radiation after it has interacted with or passed through the object in order to provide information relating to the object.
173 Citations
20 Claims
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1. A scanning method for scanning an object moving in a first direction comprising:
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irradiating the object with radiation; providing a first detector region and a second detector region 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 capturing a plurality of sets of detection data using different groups of detection elements for providing information relating to a corresponding portion of the object, and wherein each set of detection data is captured at a different time such that each group of detection elements is arranged to provide information on the same portion 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A detector arrangement for use in a scanning system, the system comprising
a radiation source arranged to irradiate an object to be scanned with radiation moving in a first direction, wherein the detector arrangement is arranged to detect radiation after it has interacted with or passed through the object in order to scan the object; -
wherein the detector arrangement comprises a first detector region and a second detector region, wherein the first detector region, the second detector region, or both comprise a detector array comprising a plurality of groups of detection elements; wherein each detection element arranged to capture detection data relating to a corresponding portion of the object, each group being arranged to capture a set of detection data at a different time such that each set of detection data covers the same region of the object; and wherein at least two of the sets of portions are overlapped in a second direction having a component normal to the first direction. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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Specification