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The measured accuracy of the X-ray attenuation curves depends on the variations of the tube voltage, the tube current and the exposure time, so that the accurate measurement of this curve is very diff...icult. The measuring method was improved to minimize the error coming from these variations by employing a transmission ionization chamber which was used to estimate the incident dose. The authors took the ratio of the attenuated dose to the incident dose measured at the same time, in consequence, the measured accuracy increased effectively. The present method also made it possible to obtain the attenuation curve of a short exposure time.続きを見る
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Mendeley出力
KJ00000075094-00001