Abstract
Phosphor materials are used in medical imaging combined with radiographic film or other photodetectors. A parameter for choosing a phosphor material is the number of light photons produced per absorbed X-ray energy E, i.e. phosphor gain. Traditionally, a parameter for choosing the best photodetector for a phosphor material is the spectral matching factor, which denotes the percentage of the optical photons detected by the photodetector. However, this factor does not account for the phosphor gain neither in terms of signal strength nor in terms of noise. In this paper a new factor is introduced which evaluates phosphor-photodetector combinations in terms of optical gain signal-to-noise ratio matching. The proposed factor was implemented to some phosphor-photodetector combinations. It was found that for the narrow band emitting phosphors studied the results of the new factor and the matching factor were numerically the same. However, when not narrow bandwidth emitting phosphors were considered the results were numerically different. Additionally, for the case of CsI:Na phosphor different results were obtained in combinations ranking.
Similar content being viewed by others
References
R. Nishikawa, M.J. Yaffe: Med. Phys. 17, 894 (1990)
N. Kalivas, I. Kandarakis, D. Cavouras, L. Costaridou, C.D. Nomicos, G. Panayiotakis: Nucl. Instrum. Methods Phys. Res., Sect. A 430, 559 (1999)
R.C. Alig, S. Bloom: J. Electrochem. Soc. 124, 1136 (1977)
G. Blasse: J. Lumin. 60–61, 930 (1994)
R. Nishikawa, M. Yaffe: Med. Phys. 17, 887 (1990)
N. Kalivas, L. Costaridou, I. Kandarakis, D. Cavouras, C.D. Nomicos, G. Panayiotakis: Appl. Phys. A 69, 337 (1999)
G.E. Giakoumakis: Appl. Phys. A 52, 7 (1991)
G. Panayiotakis, D. Cavouras, I. Kandarakis, C. Nomicos: Appl. Phys. A 62, 483 (1996)
I. Kandarakis, D. Cavouras: Nucl. Instrum. Methods Phys. Res., Sect. A 460, 412 (2001)
E. Kreyszig: Introductory Mathematical Statistics (Wiley, New York 1970)
A. Papoulis: Probability Random Variables and Stochastic Processes (McGraw-Hill, New York 1965)
R.H. Bartram, A. Lempicki: J. Lumin. 68, 225 (1996)
I. Kandarakis, D. Cavouras, G. Panayiotakis, C.D. Nomicos: Phys. Med. Biol. 42, 1351 (1997)
D. Cavouras, I. Kandarakis, G. Panayiotakis, E.K. Evangelou, C.D. Nomicos: Med. Phys. 23, 1965 (1996)
I. Kandarakis, D. Cavouras: Eur. Radiol. 11, 1083 (2001)
A.M. Gurvich: Rad. Meas. 24, 325 (1995)
S.L. Issler, C.C. Torardi: J. Alloys Compd. 229, 54 (1995)
Nucl. Instrum. Methods Phys. Res., Sect. A 417, 86 (1998)
I. Kandarakis, D. Cavouras: Appl. Radiat. Isot. 54, 821 (2001)
I. Kandarakis, D. Cavouras, G. Panayiotakis, C.D. Nomicos: Appl. Phys. B 72, 887 (2001)
I. Kandarakis, D Cavouras, P Prassopoulos, E. Kanellopoulos, C.D. Nomicos, G. Panayiotakis: Appl. Phys. A 67, 521 (1998)
R. Birch, M. Marshal, G.M. Asdran: Catalogue of Spectral Data for Diagnostic X-rays, HPA Scientific Report Series 30 (Hospital Physicists Association, London, U.K. 1979)
Author information
Authors and Affiliations
Corresponding author
Additional information
PACS
78.65; 42.80
Rights and permissions
About this article
Cite this article
Kalivas, N., Costaridou, L., Kandarakis, I. et al. Optical gain signal-to-noise ratio transfer efficiency as an index for ranking of phosphor- photodetector combinations used in X-ray medical imaging. Appl. Phys. A 78, 915–919 (2004). https://doi.org/10.1007/s00339-003-2089-5
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00339-003-2089-5