Physics
Scientific paper
Apr 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996spie.2708..116f&link_type=abstract
Proc. SPIE Vol. 2708, p. 116-127, Medical Imaging 1996: Physics of Medical Imaging, Richard L. Van Metter; Jacob Beutel; Eds.
Physics
Scientific paper
Digital x-ray imaging detectors for soft x-rays (1 to 50 keV) are significant for medical mammography, dental radiography, microradiography, x-ray diffraction, and x-ray telescope applications. For systems in which a scintillator is optically coupled to a photodetector, a small number of electrons are produced for each interaction in the scintillator (more than 10 e- in well designed systems). However, x-rays interacting directly in the photodetector produce a large charge for each detected event (about 4,700 e- for a 17 keV x-ray absorbed in silicon. These direct interactions can significantly increase image noise even when their interaction probability and contribution to image signal are low. In this paper we report on analytic investigations of the direct and indirect contributions to noise for a system consisting of a CsI scintillator, fiber optic coupler, and CCD photo-detector. The fiber optic coupler is shown to be essential to shield the CCD detector from direct interactions. A 3 mm thick fiber optic coupler is sufficient to eliminate most of the events that can noticeably increase noise.
Ciarelli James J.
Flynn Michael J.
Hames Sean M.
No associations
LandOfFree
Effect of direct x-ray interaction in the photodetector on image noise for a CCD/scintillator system does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effect of direct x-ray interaction in the photodetector on image noise for a CCD/scintillator system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effect of direct x-ray interaction in the photodetector on image noise for a CCD/scintillator system will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1108968