Method for image reconstruction through selection of object regi

Details Method for image reconstruction through selection of object regi Method for image reconstruction through selection of object regi

1989-01-25

1991-01-08

Fleming, Michael R.

Boots, shoes, and leggings

36441315, G06F 1542

Patent

active

049841602

ABSTRACT:
The fact that a vascular tree occupies a very small portion of the surrounding space is profitably employed for reducing the number of reconstruction calculations and improving the quality of this reconstruction without thereby making restrictive geometrical hypotheses. A support region of the object is determined. An estimation of the object to be reconstructed is then carried out on the support region by means of an algebraic method. Determination of the object support involves a statistical evaluation of the detected observations and a comparison of this evaluation with a measurement of the intrinsic noise of the measurement chain. Noise problems are overcome by means of the statistical study. By utilizing a second estimation stage, and taking the support into account, one avoids a restrictive implicit assumption on a convex shape of the objects to be studied.

REFERENCES:
patent: 4751643 (1988-06-01), Lorensen et al.
patent: 4791567 (1988-12-01), Cline et al.
patent: 4821213 (1989-04-01), Cline et al.
Journal of Computer Assisted Tomography, vol. 3, No. 4, Aug. 1979, pp. 439-446, Raven Press, New York, U.S.; L. D. Harris et al.: "Display and Visualization of Three-Dimensional Reconstructed Anatomic Morphology: Coronary Vasculature of Dogs"-*Summary; pp. 441-443*.
Physics in Medicine & Biology, vol. 29, No. 4, Apr. 1984, pp. 329-339, The Institute of Physics, Bristol, GB; K. Faulkner et al.: "Noise and Contrast Detection in Computed Tomography Images", *Summary, p. 333-p. 334; pp. 338, 339*.
Proceedings of Melecon'85, Madrid, Oct. 8-10, 1985, vol. 2: "Digital Signal Processing", pp. 221-225, IEEE, New York, U.S.; I. E. Magnin et al.: "Three Dimensional Reconstruction in Coded-Source Imaging".

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