Development of a non-linear weighted hybrid cone-beam CT reconstruction for circular trajectories

We investigated an image reconstruction algorithm to reduce cone-beam artifacts in cone-beam CT. Our new algorithm to reduce such artifacts features: (1) a change in weighting with respect to projection data obtained at different projection angles; (2) distribution of correction coefficients so that they are larger near the center of the detector, while taking individual channel data for the detector into account, and smaller near the edges; (3) three-dimensional back-projection of corrected projection data. These findings confirmed that this algorithm reduces cone-beam artifacts and generates high-quality reconstruction images.

[1]  K. Taguchi,et al.  Algorithm for image reconstruction in multi-slice helical CT. , 1998, Medical physics.

[2]  Alexander Katsevich,et al.  Theoretically Exact Filtered Backprojection-Type Inversion Algorithm for Spiral CT , 2002, SIAM J. Appl. Math..

[3]  Michael W. Vannier,et al.  The effect of pitch in multislice spiral/helical CT , 1999 .

[4]  M. Defrise,et al.  Single-slice rebinning method for helical cone-beam CT. , 1999, Physics in medicine and biology.

[5]  C A Carlsson,et al.  Imaging modalities in x-ray computerized tomography and in selected volume tomography , 1999, Physics in medicine and biology.

[6]  J T Ennis,et al.  Benign versus malignant breast disease: comparison of contrast-enhanced MR imaging and Tc-99m tetrofosmin scintimammography. , 1997, Radiology.

[7]  M. Defrise,et al.  Cone-beam filtered-backprojection algorithm for truncated helical data. , 1998, Physics in medicine and biology.

[8]  H Hu,et al.  Multi-slice helical CT: scan and reconstruction. , 1999, Medical physics.

[9]  L. Feldkamp,et al.  Practical cone-beam algorithm , 1984 .

[10]  S. Samarasekera,et al.  Exact cone beam CT with a spiral scan. , 1998, Physics in medicine and biology.

[11]  G. Wang,et al.  A general cone-beam reconstruction algorithm , 1993, IEEE Trans. Medical Imaging.

[12]  Henrik Turbell,et al.  Cone-Beam Reconstruction Using Filtered Backprojection , 2001 .

[13]  K J Klose,et al.  Multiplanar reconstructions and three-dimensional imaging (computed rotational osteography) of complex fractures by using a C-arm system: initial results. , 2001, Radiology.

[14]  Ekkehard Euler,et al.  Three-dimensional CT with a modified C-arm image intensifier: feasibility. , 2002, Radiology.

[15]  M. Defrise,et al.  Approximate short-scan filtered-backprojection for helical CB reconstruction , 1998, 1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255).

[16]  Y. Trousset,et al.  3D angiography. Clinical interest. First applications in interventional neuroradiology. , 1998, Journal of neuroradiology. Journal de neuroradiologie.

[17]  Bruce D. Smith.  Image Reconstruction from Cone-Beam Projections: Necessary and Sufficient Conditions and Reconstruction Methods , 1985, IEEE Transactions on Medical Imaging.

[18]  M. Grass,et al.  3D cone-beam CT reconstruction for circular trajectories. , 2000, Physics in medicine and biology.

[19]  M D Silver,et al.  High-helical-pitch, cone-beam computed tomography. , 1998, Physics in medicine and biology.

[20]  H. Tuy.  AN INVERSION FORMULA FOR CONE-BEAM RECONSTRUCTION* , 1983 .