EVALUATION OF ORGAN DOSE BASED ON PATIENT DATA IN EAST ASIAN DESCENT PEDIATRIC HEAD CT EXAMINATIONS. Issue 3 (17th December 2020)

• Record Type: Journal Article
• Authors: Kawamoto, Keishin; Fukushima, Yasuhiro; Matsuda, Akira; Nakata, Manabu
• Is Part Of: Radiation protection dosimetry. Volume 192:Issue 3(2020)
• Page Start: 335
• Page End: 340
• Publication Date: 2020-12-17
• Subjects: Radiation dosimetry -- Periodicals; Radiation -- Safety measures -- Periodicals; 363.1799
• DOI: 10.1093/rpd/ncaa200
• Languages: English
• ISSNs: 0144-8420

Abstract

Abstract: The purpose of this study was to investigate other indices estimating absorbed dose for eye lens and brain, using clinical images of East Asian pediatric patients. We simulated head computed tomography (CT ) examinations in 104 pediatric patients. Effective diameter ( d eff ) and water equivalent diameter ( dw ) were measured on clinical images. Various size metrics and age were compared with absorbed dose normalised by CTDIvol (nD). The nD was estimated for eye and brain. The nD tended to decrease with advancing age. R 2 between age and nD were 0.38 and 0.31 for eye and brain, respectively. Increasing head diameters decreased each nD. R 2 between d eff and dw, and nD were 0.20–0.24 and 0.51–0.53 for eye and brain, respectively. Head sizes allowed us to estimate absorbed dose in brain CT on East Asian pediatric patients. Scanning parameters for pediatric head CT may need to be based on individual patient information.