Method for artifact reduction using monoenergetic data in computed tomography

A method for artifact correction in computed tomography, the method comprising:

• (1) acquiring a plurality of data sets (D1, D2, D3 . . . Dn) associated with at least one low X-ray energy, and at least one high X-ray energy;
• (2) generating a plurality of preliminary images (I1, I2, I3 . . . In) from the plurality of data sets acquired in Step (1);
• (3) identifying sources of an artifact source image (ASI), wherein ASI=f(I1, I2, I3 . . . In);
• (4) forward projecting the artifact source image (ASI) to produce artifact source data (ASD), wherein ASD=fp(ASI);
• (5) selecting and combining the plurality of data sets (D1, D2, D3 . . . Dn) acquired with at least one low X-ray energy and at least one high X-ray energy in order to produce a new subset of data associated with the artifact, whereby to produce artifact reduced data (ARD), wherein ARD=f(ASD, D1, D2, D3 . . . Dn);
• (6) generating a repaired data set (RpD) to keep data sets associated with the low X-ray energy in artifact-free data and to introduce data sets associated with the high X-ray energy in regions impacted by an artifact, wherein RpD=f(ARD, D1, D2, D3 . . . Dn);
• and
• (7) generating a final reduced artifact image (RAI) from the repaired data set, wherein RAI=bp(RpD), and further wherein the function bp is any function which generates an image from data.