DocumentCode :
2184425
Title :
Depth-of-interaction effects in columnar phosphors for exponential X-ray absorption
Author :
Badano, A. ; Gagne, R.M. ; Jennings, R.J.
Author_Institution :
Center for Devices & Radiol. Health, US Food & Drug Adm., Rockville, MD, USA
fYear :
2002
fDate :
2002
Firstpage :
557
Lastpage :
560
Abstract :
The depth-dependent blur of phosphor screens have been studied using analytical and numerical methods by a number of investigators. We present an analysis of the effect of depth-of-interaction on the modulation transfer function of columnar phosphor screens. We extend our previously reported results of single X-ray interactions to the study of X-ray beams that exponentially deposit energy in the phosphor. We show that depth, dependence of the signal is significant also in columnar phosphors. However, the modulation of high frequencies remains high due to the sharpness of the line-spread function caused by waveguiding of light within the columns.
Keywords :
X-ray absorption; X-ray detection; biomedical equipment; diagnostic radiography; phosphors; columnar phosphors; depth-dependent blur; depth-of-interaction effects; exponential X-ray absorption; high frequencies modulation; instrumentation; medical diagnostic imaging; medical instrumentation; phosphor screens; Electromagnetic wave absorption; Optical detectors; Optical refraction; Optical scattering; Optical sensors; Optoelectronic and photonic sensors; Phosphors; Sensor arrays; X-ray detection; X-ray imaging;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Biomedical Imaging, 2002. Proceedings. 2002 IEEE International Symposium on
Print_ISBN :
0-7803-7584-X
Type :
conf
DOI :
10.1109/ISBI.2002.1029318
Filename :
1029318
Link To Document :
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