Size-specific dose estimates in pediatric brain CT in relation to age and weight

被引：8

作者：

Fujii, Kaoru ^{[1
]}

Inoue, Yusuke ^{[1
]}

Itoh, Hiroyasu ^{[2
]}

Sasa, Ryosuke ^{[2
]}

Hata, Hirofumi ^{[2
]}

Mitsui, Kohei ^{[1
]}

机构：

[1] Kitasato Univ, Sch Med, Dept Diagnost Radiol, Sagamihara, Kanagawa 2520374, Japan

[2] Kitasato Univ Hosp, Dept Radiol, Sagamihara, Kanagawa 2520329, Japan

来源：

RADIATION PROTECTION DOSIMETRY | 2023年 / 199卷 / 10期

关键词：

AUTOMATIC EXPOSURE CONTROL; TUBE CURRENT MODULATION; COMPUTED-TOMOGRAPHY; MULTIDETECTOR CT; DIRECTION;

D O I：

10.1093/rpd/ncad133

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The size-specific dose estimate (SSDE) is used for radiation dose management in computed tomography (CT) and represents patient's absorbed dose more accurately than volume CT dose index. The relationship between SSDE and age or weight was investigated using 980 pediatric brain CT scans. Monolinear, power, and bilinear functions were fitted to the plots of SSDE against age or weight, and SSDE was estimated using the obtained functions. SSDE showed a biphasic increase with increasing age and weight: a rapid initial increase and subsequent a slow increase. Bilinear and power functions were successfully fitted to the plots, and mean estimation errors were close to 0, irrespective of the age or weight group. The standard SSDE values estimated from the obtained functions agreed well with the median values for each age or weight group. The curve-fitting method is expected to aid radiation dose management for pediatric brain CT using SSDE.

引用

页码：1075 / 1081

页数：7

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