Lung: feasibility of a method for changing tube current during low-dose helical CT.
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.
Itoh
Shigeki
S
Department of Technical Radiology, Nagoya University School of Medicine, Tsumai-cho 65, Showa-ku, Japan. shigeito@met.nagoya-u.ac.jp
Ikeda
Mitsuru
M
Mori
Yoshine
Y
Suzuki
Koujiro
K
Sawaki
Akiko
A
Iwano
Shingo
S
Satake
Hiroko
H
Arahata
Shoji
S
Isomura
Takayuki
T
Ozaki
Masahiro
M
Ishigaki
Takeo
T
D006801:Humans; D008168:Lung / Q000000981:diagnostic imaging*; D008175:Lung Neoplasms / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed / Q000379:methods*