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- W2405455244 abstract "Because the exposure dose in X-ray computed tomography examinations is sometimes difficult to determine, it is important to be able to estimate the dose for these examinations. The effective energy of the X-ray CT scanner is required to estimate exposure dose. Although the half-value-layer (HVL) method has been used to calculate effective energy, it is not an easy method. This paper proposes a technique by which effective energy can be easily calculated. Certain details were found to cause change in effective energy, and the ratio (inner-metal center-air ratio: IMCAR) between air dose and dose in fixing the metallic pipe in the isocenter of an X-ray CT scanner was necessary. The IMCAR from a different X-ray CT scanner was required, and, when effective energy was calculated, it showed an error of less than 0.7% for the half-value-layer method. The effect of this error on dose estimation was slight (0.4%). This technique is useful, because effective energy can easily be calculated with a high degree of accuracy." @default.
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- W2405455244 date "2005-01-01" @default.
- W2405455244 modified "2023-09-24" @default.
- W2405455244 title "New Method of Estimating Effective Energy for X-ray CT Scanners" @default.
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- W2405455244 doi "https://doi.org/10.6009/jjrt.kj00003326699" @default.
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