X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1997-07-03
1999-12-07
Bruce, David Vernon
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378901, A61B 603
Patent
active
059995874
ABSTRACT:
A method of and system for the 3-D reconstruction of an image from 2-D cone-beam tomography projections is disclosed in which a circle-plus-arc data acquisition geometry is utilized to provide a complete set of data so that an exact 3-D reconstruction is obtained. A volume CT scanner which uses a cone-beam x-ray source and a 2-D detector is utilized in which one set of cone-beam projections is acquired while rotating the x-ray tube and detector on the CT gantry and then another set of projections is acquired while tilting the gantry by a small angle. The projection data is preweighted and the partial derivatives of the preweighted projection data are calculated. Those calculated partial derivatives are rebinned to the first derivative of the Radon transform, for both the circular orbit data and the arc orbit data. The second partial derivative of the Radon transform is then calculated and then the reconstructed 3-D images are obtained by backprojecting using the inverse Radon transform.
REFERENCES:
patent: 5170439 (1992-12-01), Zeng et al.
patent: 5257183 (1993-10-01), Tam
patent: 5278884 (1994-01-01), Eberhard et al.
patent: 5365560 (1994-11-01), Tam
patent: 5390226 (1995-02-01), Tam
patent: 5400255 (1995-03-01), Hu
patent: 5461650 (1995-10-01), Tam
patent: 5517602 (1996-05-01), Natarajan
Smith, Bruce D., "Image Reconstruction from Cone-Beam Projections: Necessary and Sufficient Conditions and Reconstruction Methods", IEEE Transactions on Medical Imaging, vol. MI-4, No. 1, pp. 14-25, Mar. 1985.
P. Grangeat, "Mathematical Framework of Cone Beam 3D Reconstruction via the First Derivative of the radon Transform", Mathematical Methods in Tomography, Herman, Lewis, Natterer (eds.) Lecture Notes in Mathematics, No. 1497, pp. 66-97, Spring Verlag (1990).
L. A. Feldkamp et al., "Practical cone-beam algorithm", J. Opt. Soc. Am. A/vol. 1, No. 6, Jun. 1984 pp. 612-619.
Y. Weng et al., "A Reconstruction Algorithm for Helical Cone-Beam SPECT", IEEE Transactions on Nuclear Science, vol. 40, No. 4, Aug. 1993, pp. 1092-1101.
B. Smith, "Cone-beam tomography: recent advances and a tutorial review", Optical Engineering, vol. 29, No. 5, May 1990, pp. 524-534.
H. Tuy, "An inversion formula for cone-beam reconstruction", SIAM J. Appl. Math, vol. 43, No. 3, Jun. 1983, pp. 546-552.
Ning Ruola
Wang Xiao-hui
Bruce David Vernon
University of Rochester
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