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