CAJ | 학술논문

目的探讨不同管电压下对比度细节体模(CDRAD2.0)及职业性接尘者数字化X线胸片(DR)的图像质量.方法对CDRAD2.0体模进行高仟伏及不同管电压的DR成像,由3位阅片者对其图像进行分析,计算并比较影像质量因子(IQF);同时选择136例粉尘作业人员,拍摄高仟伏X线胸片和不同管电压下的DR片,参照高仟伏胸片分别对DR片的10个解剖部位进行评分,比较DR与高仟伏图像间的差异.结果在CDRAD2.0体模中,3位阅片者DR图像的IQF值均在120 kV条件下达到最小,平均IQF值为22.25.经随机效应模型的方差分析,不同管电压下的DR图像的平均IQF值的差异有统计学意义(F=13.775,P＜0.01).120 kV的DR图像与高仟伏图像IQF均值的差异无统计学意义(t=-0.58,P=0.979).在接尘者中,120 kV投照条件下的DR图像对解剖情况的显示最接近高仟伏模拟图像,均值与0(基本等同于高仟伏片)的差异无统计学意义(P＞0.05).结论在CDRAD2.0体模或接尘者中,120kV管电压下的DR图像质量基本等同于高仟伏片.
목적 탐토불동관전압하대비도세절체모(CDRAD2.0)급직업성접진자수자화X선흉편(DR)적도상질량.방법 대CDRAD2.0체모진행고천복급불동관전압적DR성상,유3위열편자대기도상진행분석,계산병비교영상질량인자(IQF);동시선택136례분진작업인원,박섭고천복X선흉편화불동관전압하적DR편,삼조고천복흉편분별대DR편적10개해부부위진행평분,비교DR여고천복도상간적차이.결과 재CDRAD2.0체모중,3위열편자DR도상적IQF치균재120 kV조건하체도최소,평균IQF치위22.25.경수궤효응모형적방차분석,불동관전압하적DR도상적평균IQF치적차이유통계학의의(F=13.775,P＜0.01).120 kV적DR도상여고천복도상IQF균치적차이무통계학의의(t=-0.58,P=0.979).재접진자중,120 kV투조조건하적DR도상대해부정황적현시최접근고천복모의도상,균치여0(기본등동우고천복편)적차이무통계학의의(P＞0.05).결론 재CDRAD2.0체모혹접진자중,120kV관전압하적DR도상질량기본등동우고천복편.
Objective To explore the image quality of different tube voltage on digital chest radiograph for contrast detail phantom (CDRAD2.0) and occupational exposed workers.Methods The CDRAD2.0 phantom DR images of high KV and different tube voltages were analyzed by 3 readers,image quality figure (IQF) were calculated and compared ;at the same time 136 exposed workers were examined with high-kV and DR chest radiograph of different tube voltages.Contrast to high-KV images,10 anatomic sites were scored.The image differences were compared between DR and high-kV.Results On CDRAD2.0 phantom,the IQF value of DR images in 3 readers were minimum in the condition of 120 kV,average value was 22.25.The analysis of variance in model with random effects,the mean IQF value of different tube voltage DR image had a significant difference (F=13.775,P＜0.01) ;By Dunnett t-tests analysis,the mean IQF value of DR image in 120 kV and high kilovoltage had no difference (t=-0.58,P=0.979); On clinical cases,the DR image of 120 kV showed the closest anatomy to the high KV,the mean had no significant difference with 0 (P＞0.05) with single sample t test.Conclusion On the CDRAD2.0 phantom or clinical exposed workers,the DR image quality of 120 kV tube voltage equals to high-KV basically.