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Lung: feasibility of a method for changing tube current during low-dose helical CT
Shigeki Itoh1, Mitsuru Ikeda, Yoshine Mori
1Department of Technical Radiology, Nagoya University School of Medicine, Tsumai-cho 65, Showa-ku, Japan. shigeito@met.nagoya-u.ac.jp
Radiology
|August 31, 2002
Abstract:
A method for changing the tube current during helical scanning was applied to low-dose computed tomography (CT) in the lung. The changing method resulted in significant equalization of image noise in various lung sections compared with that at scanning with constant tube current. Detectability of nodules was equivalent between 60 mA and the changing method, whereas degradation occurred at 20 mA. This method seems feasible for the low-dose CT of lung cancer screening.