Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Patent
1994-03-24
1996-02-06
Porta, David P.
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
25036302, 2503701, 250371, G01T 120
Patent
active
054897823
ABSTRACT:
The invention relates to forming an image from a random particle flux. Particles of the flux are detected by a discrete-cell detector having a cell size finer than conventionally used. Preferably, the cell size is sufficiently small that almost all cells of the detector count at most one particle during the image acquisition time. The count data are filtered through a band-limiting filter whose bandwidth lies between a bandwidth corresponding to the detector cell size and the flux bandwidth of interest. Outliers may be flattened before filtering. Neighborhoods around each cell are evaluated to differentiate stationary regions (where neighboring data are relatively similar) from edge regions (where neighboring data are relatively dissimilar). In stationary regions, a revised estimate for a cell is computed as an average over a relatively large neighborhood around the cell. In edge regions, a revised estimate is computed as an average over a relatively small neighborhood. For cells lying in an edge region but near a stationary/edge boundary, a revised estimate is computed by extrapolating from data in the nearby stationary region.
REFERENCES:
patent: 4860205 (1989-08-01), Jatteau
patent: 5107122 (1992-04-01), Barkan et al.
patent: 5293044 (1994-03-01), Klingenbeck-Regn et al.
Robinson, D. R. T., "Maximum Entrophy With Poisson Statistics", in Maximum Entrophy and Bayesian Methods, 337-341, 1991.
King et al., "Fast Count-Dependent Digital Filtering of Nuclear Medicine Images: Concise Communication", Journal of Nuclear Medicine, 24:1039-1045, 1983.
Pratt, William K., "Image Sampling and Reconstruction", Ch. 4 of Digital Image Processing, 93-121, 1991.
Rollo et al., "Factors Affecting Image Formation", Ch. 10 of Nuclear Medicine Physics, Instrumentation, and Agents, 387-435, 1977.
Bruce David Vernon
Imaging Laboratory, Inc.
Porta David P.
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