Motion free ct sampling with electron beam scanning and time delay integration detector
AssigneeWashington University
InventorsTiezhi Zhang, Qinghao Chen, Shuang Zhou, Yuewen Tan
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Abstract
A CT scanning method compensates gantry motion blurring in projection measurement based on synchronized focal spot movement and detector data shifting. Tube power is increased by moving the focal on the target and reducing focal spot dwell duration. The CT scanning method is used on helical CT and cone beam with a rotating anode source and CBCT and TBCT with a linear array x-ray source.
Claims20
A computed tomography (CT) system an x-ray source;
- a 2D detector that performs projection measurement while focal spots move in a same speed and an opposite direction of a gantry rotation;
- and
- a time-delay-integration detector configured to shift data in the same speed and the opposite direction of the gantry rotation.
A linear array x-ray source for a computed tomography (CT) system comprising:
- a fixed anode;
- and
- focal spots that are moving repeatedly relative to an array direction.
A method for performing computed tomography (CT) producing x-ray photons with an x-ray source;
- moving focal spots in a same speed and an opposite direction of a gantry rotation;
- performing projection measurement with a 2D detector while the focal spots move in a same speed and an opposite direction of a gantry rotation;
- and
- shifting data in the same speed and the opposite direction of the gantry rotation using a time-delay-integration detector.
Dependencies are inferred from the claim text.