Method and apparatus for reconstructing SPECT image by utilizing

Details Method and apparatus for reconstructing SPECT image by utilizing Method and apparatus for reconstructing SPECT image by utilizing

1994-03-24

1995-07-18

Fields, Carolyn E.

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

25036304, 36441321, A61B 600, G06F 1900, G01T 1166

Patent

active

054344166

ABSTRACT:
A method and an apparatus for reconstructing SPECT image capable of improving the SPECT image resolution. The apparatus includes: a detector, including a fan-beam collimator, for detecting gamma (.gamma.) rays emitted from a radio isotope injected into a biological body; a rotation unit for effecting relative rotation between the biological body and the detector about a center of rotation to thereby acquire projection data from a different direction; a first reconstructing unit for convoluting the projection data obtained from the detector, by a first convolution function, and for back-projecting the convoluted projection data to a specific region which lies in a sufficiently close vicinity of the detector; a second reconstructing unit for convoluting the projection data by a second convolution function, and for back-projecting the secondly convoluted projection data to another specific region; and display means for displaying thereon a distribution image reconstructed by the first and second reconstructing units.

REFERENCES:
patent: 4729100 (1988-03-01), Tsujii
patent: 5324946 (1994-06-01), Ichihara et al.
G. T. Herman, et al., Convolution Reconstruction Techniques For Divergent Beams, Compt. Biol, Med, 1976, vol. 6, pp. 259-271.

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