X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1991-12-11
1994-07-26
Dzierzynski, Paul M.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378 14, 378901, 36441315, 36441316, 36441317, G01N 23083
Patent
active
053331648
ABSTRACT:
An improved method and apparatus is disclosed for retaining only necessary cone beam projection data acquired along a three dimensional scanning trajectory in order to ensure more computationally efficient processing of Radon data for computerized tomographic image reconstruction consistent with the overall shape of an object irradiated by a cone beam source. If the scanning trajectory is such that an otherwise complete see of Radon data is acquired the image so reconstructed will also be exact. The invention is directed to restricting image reconstruction processing to only that region of support in Radon space actually occupied by the object itself; therefore, computational approximations consistent with the overall shape of the object can be applied to improve image reconstruction efficiency.
REFERENCES:
patent: 4375696 (1983-03-01), Wagner
patent: 4504909 (1985-05-01), Acharya et al.
patent: 5047931 (1991-09-01), Lin
patent: 5068882 (1991-11-01), Eberhard
patent: 5073910 (1991-12-01), Eberhard et al.
patent: 5136660 (1992-08-01), Flickner et al.
patent: 5170439 (1982-12-01), Zeng et al.
patent: 5187659 (1993-02-01), Eberhard et al.
patent: 5218534 (1993-06-01), Trousset et al.
patent: 5253171 (1993-10-01), Hsiao et al.
Convolutional Reconstruction From Cone-Beam Projection Data, Gerald N. Minerbo, IEEE Transactions on Nuclear Science, vol. NS-26, No. 2, Apr. 1979, pp. 2682-2684.
Practical Cone-Beam Algorithm, L. A. Feldkamp, L. C. Davis, and J. W. Kress, J. Opt. Soc. Am. A, vol. 1, No. 6, Jun. 1984, pp. 612-619.
P. Grangeat, "Analysis of a 3D Imaging System by Reconstruction from X-Radiographies in Conical Geometry," Ph.D. Thesis, National College of Telecommunications (l'Ecole Nationale Superieure des Telecommuncations), France (1987) [translateion enclosed].
Cone-Beam Tomography: Recent Advances and a Tutorial Review, Bruce D. Smith, Optical Engineering, May 1990, vol. 29, No. 5, pp. 524-534.
Image Reconstruction From Cone-Beam Projection: Necessary and Sufficient Conditions and Reconstruction Methods, Bruce D. Smith, IEEE Transactions on Medical Imaging, Mar. 1985, vol. MI-4, No. 1, pp. 14-25.
An Inversion Formula for Cone-Beam Reconstruction, Heang K. Tuy, Siam J. Appl. Math., Jun. 1983, vol. 43, No. 3, pp. 546-552.
Bruce David V.
Dzierzynski Paul M.
General Electric Company
Webb II Paul R.
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