Low-dose radiation in the hip digital tomosynthesis

Huizhao WU; Wenjuan WU; Yan Song; Junli LU; Zhe Guo; Zekun Zhang

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Low-dose radiation in the hip digital tomosynthesis

VernacularTitle:髋关节数字化断层融合摄影的低剂量研究
Author: Huizhao WU ; Wenjuan WU ; Yan SONG ; Junli LU ; Zhe GUO ; Zekun ZHANG
Publication Type:Journal Article
Keywords: Hip; Digital tomosynthesis; Radiation dose
From: Chinese Journal of Radiological Medicine and Protection 2015;35(2):153-156
CountryChina
Language:Chinese
Abstract: Objective To explore the optimal dose ratio set in the hip digital tomosynthesis (DTS),and to reduce patient's examination dose as low as possible.Methods Ninety patients who received hip DTS examination were randomly divided into 3 groups,with the dose ratio as 6,7 and 8,respectively.One-way ANOVA test was used to compare.the image quality and radiation dose among 3 groups.Results The values of entrance surface dose (ESD),dose-area product (DAP) and image quality score of 3 groups were [(3.76 ± 1.89) mGy,(18.41 ± 11.71) dGy·cm2,3.03 ± 0.24],[(5.24±2.76)mGy,(26.99±13.34)dGy·cm2),3.60±0.11],and [(6.39±1.75)mGy,(36.96± 22.49) dGy· cm2,3.64 ± 0.09],respectively.The difference among three groups was statistically significant (F =10.94,9.45,139.26,P ＜ 0.05).The S-N-K test showed that both ESD values and DAP values in 6,7,and 8 time-dose ratio group was from small to large.The image quality score of 6 time-dose ratio group was lower than that of the other groups with no significant difference.Conclusions Dose ratio is one of the important parameters to result in the radiation dose of DTS.Dose ration 7 is optimal in hip DTS,which could match the image quality and radiation dose best and finally protect patients from unnecessary radiation damage.