Radiant energy – Invisible radiant energy responsive electric signalling – With or including a luminophor
Reexamination Certificate
2011-03-08
2011-03-08
Porta, David P (Department: 2884)
Radiant energy
Invisible radiant energy responsive electric signalling
With or including a luminophor
Reexamination Certificate
active
07902511
ABSTRACT:
The method calculates a scatter estimate for scatter correction of detection data from a subject in a positron emission tomographic scanner. The detection data represent the scattered events and unscattered events of annihilation photons emitted in the subject. The method uses the following steps:determine an estimate of the unscattered events;determine a simulation of the scattered events;determine a value of a scaling factor by fitting the sum of the estimate of the unscattered events and a product of the scaling factor and the simulation of the scattered events to the detection data; anddetermine the scatter estimate as the product of the scaling factor having said value and the simulation of the scattered events.
REFERENCES:
Accorsi, R. et. al. “Implementation of a single scatter simulation algorithm for 3D PET: application to emission and transmission scanning” 2002 IEEE Nuclear Science symposium conf. record Norfold V, Nov. 10-16, 2002, vol. 2, pp. 816-820.
Holdsworth, CH.H., et. al. “Performance analysis of an improved 3-D PET Monte Carlo simulation and scatter correction” IEEE transactions on Nuclear Science, New York, vol. 49, No. 1, Feb. 2002.
PCT/GB2007/004874 ISRWO dated Dec. 2007.
Heukensfeldt Jansen Floribertus P. M.
Thielemans Kris Filip Johan Jules
Tsoumpas Charalampos Panos
Chisholm Robert F.
Gaworecki Mark R
General Electric Company
Hammersmith Imanet Ltd.
Porta David P
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