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NTIS 바로가기Journal of computer assisted tomography, v.33 no.6, 2009년, pp.973 - 977
Funama, Yoshinori (From the Departments of *Radiological Sciences, School of Health Sciences, †Diagnostic Radiology, Graduate School of Medical Sciences, and ‡Radiology, Kumamoto University, Kumamoto, Japan) , Taguchi, Katsuyuki (and §The Russell H. Morgan Department of Radiology and Radiological Science, The Johns Hopkins University School of Medicine.) , Awai, Kazuo , Sakabe, Daisuke , Shimamura, Masamichi , Yamashita, Yasuyuki
We describe the effect of the off-center position, the bowtie filter type, and the direction of scan projection radiograph on the radiation dose and image noise of 64-detector computed tomographic scans using the automatic tube current modulation technique. On anteroposterior scan projection radiographs, the tube current ratio increased, with an increase in the off-center position of the phantom irrespective of the filter size. On lateral scan projection radiographs, it remained constant with each bowtie filter type regardless of the off-center phantom position.
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