Methods and apparatus for adaptive interpolation reduced view CT scan
AssigneeGeneral Electric Company
InventorJiang Hsieh
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Abstract
In one aspect, the present invention is a method for computerized tomographic (CT) imaging of an object, the method including steps of scanning an object with a CT imaging system to acquire views including projection samples of an object; interpolating the views nonuniformly within a selected view range to produce nonuniformly interpolated views; weighting the views, including weighting the acquired views and the nonuniformly interpolated views, to compensate for the nonuniform interpolation; and filtering and backprojecting the views to generate an image of the object. Improved CT imaging is thus provided by reducing view aliasing artifacts without simultaneously reducing spatial resolution to clinically unacceptable levels.
Claims22
A method for computerized tomographic (CT) imaging of an object, said method comprising:
- scanning an object with a CT imaging system to acquire views comprising projection samples of an object;
- interpolating the views nonuniformly within a selected view range to produce nonuniformly interpolated views;
- weighting the views, including weighting the acquired views and the nonuniformly interpolated views, to compensate for the nonuniform interpolation;
- and
- filtering and backprojecting the views to generate an image of the object.
A computerized tomographic (CT) imaging system configured to:
- scan an object to acquire views comprising projection samples of the object;
- interpolate the views nonuniformly within a selected view range to obtain nonuniformly interpolated views;
- weight the views, including the nonuniformly interpolated views and the acquired views, to compensate for the nonuniform interpolation;
- and
- filter and backproject the views to generate an image of the object.
Dependencies are inferred from the claim text.