Spatial distribution of radiation dose field from mobile CT head scanning

VernacularTitle:移动CT头部扫描辐射剂量场的空间分布
Author: Jinge ZHANG ; Wanlin PENG ; Zhenlin LI ; Chunchao XIA ; Jin PU
Keywords: Mobile CT; Head scanning; Radiation dose field
From: Chinese Journal of Radiological Medicine and Protection 2017;37(4):302-305
CountryChina
Language:Chinese
Abstract: Objective To identify the spatial distribution of stray radiation from mobile CT head scanning for the purpose of radiation protection.Methods The head series of CareTom mobile CT were scanned and the radiation dose was measured using TLD (LiF:Mg,Cu,P).The isodose maps of radiation dose field were plotted using Matlab software.Results Radiation dose in the front of the mobile CT was slightly higher than that in the back.The maximum value of 0.255 mGy was found to be at 0.5 m from the scanning hole center.Conclusions The stray radiation dose from mobile CT head scanning was relatively low.However in order to avoid the damage to the operators and other medical workers from long-term low dose exposure,it should keep 2 m away from mobile CT,beside or behind,when in operation.