Optical Determination of the Cross Talk of CT Detection Systems

One of the most crucial properties of a CT scanner is its spatial resolution. The cross talk is one of the main parameters to influence this property. In this study we use an optical system to characterize CT detectors and photodiode arrays which are employed in such detectors. The PDA response is m...

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Bibliographic Details
Published in2006 IEEE Nuclear Science Symposium Conference Record Vol. 5; pp. 3115 - 3118
Main Authors Buchinsky, O., Gregorian, L., Uman, I., Wainer, N.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2006
Subjects
Computed tomography
Detectors
Laser beams
Manufacturing
Optical arrays
Optical crosstalk
Particle separators
Photodiodes
Sensor arrays
Spatial resolution
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Summary:One of the most crucial properties of a CT scanner is its spatial resolution. The cross talk is one of the main parameters to influence this property. In this study we use an optical system to characterize CT detectors and photodiode arrays which are employed in such detectors. The PDA response is measured at each pixel as a function of X, Z, and the location within the array, for photodiode arrays made by several different manufacturers. In addition, the contributions due to the optical cross talk through the optical glue and due to the light penetrating the separators between the scintillator pixels are studied. The overall cross-talk results obtained are then compared to the actual cross talk measured on the CT scanner, yielding valuable information at an early stage of the scanner development.
ISBN:9781424405602
1424405602
ISSN:1082-3654
2577-0829
DOI:10.1109/NSSMIC.2006.356534