Depth-of-interaction normalization of signals for improved posit

Details Depth-of-interaction normalization of signals for improved posit Depth-of-interaction normalization of signals for improved posit

1994-04-19

1996-11-19

Hannaher, Constantine

Radiant energy

Invisible radiant energy responsive electric signalling

With or including a luminophor

25036307, G01T 1164

Patent

active

055765467

ABSTRACT:
In addition to the traditionally calculated photodetector sum signal or energy value, and X, Y position values, the second order moment of the photodetector signals is calculated from photodetector signals to obtain a value proportional to light spread out in the scintillation camera giving an indication of the depth of interaction "DOI". A position correction vector is selected according to the initially calculated position values and the second order moment value and is added to the initial position values to obtain more accurate scintillation event position values. The correction values can be calculated by interpolation using empirically determined or simulation determined values contained in a table. The method of correction using the second order value proportional to DOI can also be used to correct the first order moment value or energy value.

REFERENCES:
patent: 5285072 (1994-02-01), Klingenbeck-Regn et al.

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