Impact of additive noise on system performance of a digital X-ray imaging system.

Impact of additive noise on system performance of a digital X-ray imaging system. Research Abstract Details 

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Impact of additive noise on system performance of a digital X-ray imaging system. Abstract Text:

Da Zhang,John Rong,Wei R Chen,Feng Gao,Kexin Xu,Xizeng Wu,Hong Liu,

The impact of additive noise on the performance of a digital X-ray imaging system was investigated. The X-ray system is uniquely designed for small animal studies with a focal spot of 20 microm and an adjustable source-to-object distance for radiography. The noise power spectrum and the detective quantum efficiency of this system were measured. The additive noise increased rapidly when the exposure time exceeded a certain range, since the charge-coupled devices of the detector had no cooling system. The noise power spectrum for the additive noise and the noise of the entire imaging system were studied and compared at different exposure times. The detective quantum efficiency was also measured at different exposure times. It was observed that for exposure times less than 10 s, the detective quantum efficiency ((DQE)(0)) is approximately 0.26, dropping to 0.13 at 4 lp/mm and to 0.026 at 8 lp/mm. However, when the exposure exceeds a certain limit (10 s in this study), the rapidly increased additive noise caused the system to be no longer quantum noise limited, resulting in a decreased detective quantum efficiency and a degraded system performance. For example, at an exposure of 20 s, the DQE(O) is approximately 0.22, dropping to 0.11 at 3 lp/mm and to 0.022 at 8 lp/mm.

Impact of additive noise on system performance of a digital X-ray imaging system. Publishing Authors By Initials

D Zhang,J Rong,WR Chen,F Gao,K Xu,X Wu,H Liu,

For similar investigative techniques: epidemiologic methods: statistics as topic: sensitivity and specificity research abstracts see: investigative techniques: epidemiologic methods: statistics as topic: sensitivity and specificity research

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Impact of additive noise on system performance of a digital X-ray imaging system. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: IEEE transactions on bio-medical engineering

VOLUME: 54

Page Numbers: 69-73

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ISSN: 0018-9294

DAY: 3

MONTH: Jan

YEAR: 2007

Impact of additive noise on system performance of a digital X-ray imaging system. Information

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LANGUAGE: eng

NlmUniqueID: 12737

Impact of additive noise on system performance of a digital X-ray imaging system. Keywords Mesh Terms:

KEYWORDS: Sensitivity and Specificity

MESH TERMS: methods

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Grant and Affiliation Information for Impact of additive noise on system performance of a digital X-ray imaging system.

AFFILIATION: Center for Bioengineering, School of Electrical and Computer Engineering, University of Oklahoma, Norman, OK 73019, USA.

Country: United States

AGENCY: United States NIBIB

GRANT: R01 EB-002604

ACRONYM: EB

MEDLINETA: IEEE Trans Biomed Eng

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