title: Effect of tube current modulation for dose estimation using a simulation tool on body CT examination.
abstract: The purpose of this study was to evaluate the effect of tube current modulation for dose estimation of a body computed tomography (CT) examination using a simulation tool. The authors also compared longitudinal variations in tube current values between iterative reconstruction (IR) and filtered back-projection (FBP) reconstruction algorithms. One hundred patients underwent body CT examinations. The tube current values around 10 organ regions were recorded longitudinally from tube current information. The organ and effective doses were simulated by average tube current values and longitudinal modulated tube current values. The organ doses for the bladder and breast estimated by longitudinal modulated tube current values were 20 % higher and 25 % lower than those estimated using the average tube current values, respectively. The differences in effective doses were small (mean, 0.7 mSv). The longitudinal variations in tube current values were almost the same for the IR and FBP algorithms.
authors.affiliation: Department of Radiology, Toyota Memorial Hospital, Aichi 471-0821, Japan Department of Radiological Technology, Graduate School of Medicine, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan hanamaru0918@gmail.com.
authors.forename: Ai
authors.initials: A
authors.lastname: Kawaguchi
authors.affiliation: Department of Radiological Technology, Graduate School of Medicine, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan Department of Imaging, Nagoya Kyoritsu Hospital, 1-1 Heiwa-cho, Toyota, Aichi 454-0933, Japan.
authors.forename: Yuta
authors.initials: Y
authors.lastname: Matsunaga
authors.affiliation: Department of Radiology, Fujita Health University Hospital, Aichi 470-1192, Japan.
authors.forename: Masanao
authors.initials: M
authors.lastname: Kobayashi
authors.affiliation: School of Health Sciences, Fujita Health University, Aichi 470-1192, Japan.
authors.forename: Shoichi
authors.initials: S
authors.lastname: Suzuki
authors.affiliation: Faculty of Health Sciences, Department of Quantum Medical Technology, Kanazawa University, Kanazawa, Ishikawa 920-1192, Japan.
authors.forename: Kosuke
authors.initials: K
authors.lastname: Matsubara
authors.affiliation: Department of Radiological Technology, Graduate School of Medicine, Tohoku University, 2-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi 980-8575, Japan.
authors.forename: Koichi
authors.initials: K
authors.lastname: Chida
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000465:Algorithms; D001943:Breast Neoplasms / Q000000981:diagnostic imaging*; D003198:Computer Simulation; D005260:Female; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008137:Longitudinal Studies; D008875:Middle Aged; D011829:Radiation Dosage; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D014057:Tomography, X-Ray Computed; D001749:Urinary Bladder Neoplasms / Q000000981:diagnostic imaging*; D051598:Whole Body Imaging