Estimation of effective dose to examined adult patients during digital tomosynthesis
10.3760/cma.j.issn.0254-5098.2018.06.011
- VernacularTitle:成年受检者数字断层融合扫描有效剂量估算
- Author:
Lin ZHANG
1
;
Jianguo ZHU
;
Changcai LIU
;
Gang SONG
;
Wei LIU
;
Yusheng LI
;
Fang LIU
;
Yue CHEN
;
Huahui BIAN
;
Yulong LIU
Author Information
1. 山东省医学科学院放射医学研究所
- Keywords:
Digital Tomosynthesis;
Phantom;
Tissue weighting factor;
Effective dose
- From:
Chinese Journal of Radiological Medicine and Protection
2018;38(6):451-455
- CountryChina
- Language:Chinese
-
Abstract:
Objective To estimate the absorbed dose and effective dose to the examined adult patients during digital tomosynthesis and to provide reference data for radiation dosimetry.Methods The phantom experiments were grouped according to the examined site(main beam scanned site),and the data displayed in real time during digital tomosynthesis are used as conditions for the phantom experiments.The effective doses to the examined patients were estimated on the basis of phantom scanning and tissue-absorbed dose calculation.Results During digital tomosynthesis,the effective doses to the examined patients of various groups were 0.524 mSv for head,0.736 mSv for cervical spine,2.719 mSv for thoracic vertebra,1.810 mSv for chest,1.240 mSv for lumbar spine,2.317 mSv for abdomen and 2.316 mSv for pelvis,respectively.Conclusions During digital tomography,the highest value of effective doses was estimated to be 2.719 mSv in thoracic vertebra group,followed by abdominal group 2.317 mSv and pelvic group 2.316 mS,with the lowest 0.524 mSv in head group.The main factors influencing the effective dose include tube voltage,total mAs,irradiation field size,main beam irradiation range,and the number of tissues or organs in scanned range.
