Low Exposure X-ray Transmission Measurements for Contrast Media Detection with Filtered X-rays

Kanno, Ikuo; Maetaki, Satoshi; Aoki, Hideto; Nomiya, Seiichiro; Onabe, Hideaki

doi:10.1080/18811248.2003.9715380

Cited by 8 publications

(1 citation statement)

References 6 publications

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“…The advantages of measuring the energy of X-rays and the use of the energy subtraction (ES) method for the reduction of exposure doses in radiography, especially in the detection of contrast media such as iodine, have been presented. [1][2][3][4] When the ES method was applied to computed tomography (CT), beam-hardening artifacts were eliminated. With the conventional current X-ray measurement method, CT values for contrast media became lower with higher X-ray tube voltages and with thicker subjects.…”

Section: Introductionmentioning

confidence: 99%

Simulation Study on Unfolding Methods for Diagnostic X-rays and Mixed Gamma Rays

Hashimoto

Ohtaka

Ara

et al. 2009

J. Nucl. Sci. Technol.

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A photon detector operating in current mode that can sense X-ray energy distribution has been reported. This detector consists of a row of several segment detectors. The energy distribution is derived using an unfolding technique. In this paper, comparisons of the unfolding techniques among error reduction, spectrum surveillance, and neural network methods are discussed through simulation studies on the detection of diagnostic X-rays and gamma rays emitted by a mixture of 137 Cs and 60 Co. For diagnostic X-ray measurement, the spectrum surveillance and neural network methods appeared promising, while the error reduction method yielded poor results. However, in the case of measuring mixtures of gamma rays, the error reduction method was both sufficient and effective.

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Section: Introductionmentioning

confidence: 99%