钼铑双靶乳腺X线摄影剂量优先模式与标准模式对照研究  

The comparison between the dose mode and the standard mode in molybdenum-rhodium target X-ray mammography

作　　者：王海阔[1] 周剑[1] 张妍[1] 杨蓉[1] 房丽蕊 

机构地区：[1]首都医科大学附属北京天坛医院放射科,北京100050

出　　处：《实用放射学杂志》2015年第1期43-45,共3页Journal of Practical Radiology

摘　　要：目的：探讨钼铑双靶剂量优先模式在乳腺低辐射剂量检查中的价值。方法利用钼铑双靶乳腺机,对40例乳腺癌患者双侧乳腺分别进行头尾位（CC）和内外斜位（MLO）位标准模式和剂量优先模式摄影,对比分析160幅乳腺图像质量,分别记录平均腺体剂量（AGD）值和皮肤入射剂量（ESE）值。结果2种乳腺摄影模式均获得良好的图像质量,经检验两者间无显著性差异（χ2=0.427,P 〉0.05）。与标准模式相比,剂量优先模式摄影 CC 位 AGD 值降低约28.63%,ESE 值降低约28.28%,两者间具有显著性差异（t AGD =12.928,PM〈0.05,t ESE =8.850,P 〈0.05）；MLO 位 AGD 值降低约26.33%,ESE 值降低约29.43%,两者间具有显著性差异（t AGD =11.006,P〈0.05,t ESE =8.400,P 〈0.05）。结论在获取同等乳腺图像质量的情况下,钼铑双靶乳腺 X 射线摄影检查中剂量优先模式较标准模式能够有效降低受检者的辐射剂量。Objective To investigate the value of the dose mode （giving priority to dose reduction）of molybdenum-rhodium tar-get X-ray photography in mammary gland low-dose examination.Methods Fourty patients with breast cancer were recruited,and their bilateral mammographic images were respectively acquired by the standard modes and the dose modes in both CC and MLO po-sition using molybdenum-rhodium target X-ray machine.The total of 1 60 mammograms were obtained and analyzed in order to as-sess the images quality.The values of average glandular dose （AGD）and entrance skin exposure （ESE）on each patient were detec-ted and recorded respectively.Results The higher quality of images were guaranteed in both the standard modes and the dose modes.There was no significant difference in two mammographic modes （χ2 =0.427,P 〉0.05）.Compared with the standard mode, X-ray exposure such as AGD and ESE values were reduced by 28.63% and 28.28% in CC position,and 26.33% and 29.43% in MLO position respectively for the dose mode.The paired t-test results showed that the differences of radiation exposure in AGD and ESE between the dose mode and the standard mode were all statistically significant （P〈0.05 ）.Conclusion For the condition of achieving equivalent quality of mammograms,the dose mode may decrease radiation exposure compared to the standard mode in molybdenum-rhodium target mammography.

关 键 词：乳腺 X线摄影术 钼铑双靶 X射线 乳腺癌 低剂量 

分 类 号：R814.41[医药卫生—影像医学与核医学] R737.9[医药卫生—放射医学]