Methods and apparatus for reconstructing an image of an object

A method for reconstructing an image of an object, said method comprising:

• generating a plurality of projection data;
• helically interpolating the projection data;
• rebinning a first set of original measured projections wherein an angular increment between at least two views is uniform;
• rebinning a first set of interpolated projections wherein the angular increment between at least two views is uniform;
• and
• combining the first set of original measured projections and the first set of interpolated projections to reconstruct an image of an object.

A method for reconstructing an image of an object, said method comprising:

• rebinning a first set of original measured projections wherein an angular increment between at least two views is uniform;
• rebinning a first set of interpolated projections wherein the angular increment between at least two views is uniform;
• and
• combining the first set of original measured projections and the first set of interpolated projections to reconstruct an image of an object.

A computed tomographic (CT) imaging system for reconstructing an image of an object, said CT system comprising:

• a radiation source;
• a detector array;
• and
• a computer coupled to said detector array and said radiation source, said computer is configured to:
• generate a plurality of projection data;
• helically interpolate the projection data;
• rebin the helically interpolated projection data from a fan-beam format to a parallel-beam format;
• and
• reconstruct an image of the object using the parallel-beam format projection data.

A computed tomographic (CT) imaging system for reconstructing an image of an object, said CT system comprising:

• a radiation source;
• a detector array;
• and
• a computer coupled to said detector array and said radiation source, said computer configured to:
• generate a plurality of projection data;
• helically interpolate the projection data;
• rebin a first set of original measured projections wherein an angular increment between at least two views is uniform;
• rebin a first set of interpolated projections wherein the angular increment between at least two views is uniform;
• and
• combine the first set of original measured projections and the first set of interpolated projections to reconstruct an image of an object.

A computer readable medium encoded with a program executable by a computer for reconstructing an image of an object, said program configured to instruct the computer to:

• generate a plurality of projection data;
• helically interpolate the projection data;
• rebin the helically interpolated projection data from a fan-beam format to a parallel-beam format;
• and
• reconstruct an image of the object using the parallel-beam format projection data.

A computer readable medium encoded with a program executable by a computer for reconstructing an image of an object, said program configured to instruct the computer to:

• generate a plurality of projection data;
• helically interpolate the projection data;
• rebin a first set of original measured projections wherein an angular increment between at least two views is uniform;
• rebin a first set of interpolated projections wherein the angular increment between at least two views is uniform;
• and
• combine the first set of original measured projections and the first set of interpolated projections to reconstruct an image of an object.

A method for reconstructing an image of an object, said method comprising:

• generating a plurality of projection data;
• rebinning the projection data from a fan-beam format to a parallel-beam format, wherein said rebinning comprises:
• interpolating the projection data in a view direction β, wherein said interpolating in the view direction β comprises separating the interpolation in a view direction β into a fractional weighting operation and a shifting operation;
• and
• interpolating the projection data in a detector channel direction γ.