全数字乳腺X线摄影内外斜位投照角度对图像质量的影响  

Effects of projection angle of mediolateral obliqde on image quality of mammography

作　　者：张洪营[1] 张连连[1] 柳杰[1] 胡从依[1] 刘佩芳[1] 

机构地区：[1]天津医科大学肿瘤医院乳腺影像诊断科国家肿瘤临床医学研究中心天津市"肿瘤防治"重点实验室乳腺癌防治教育部重点实验室,天津300060

出　　处：《中国医学影像技术》2016年第6期957-960,共4页Chinese Journal of Medical Imaging Technology

基　　金：天津市卫生局科技基金(2014KZ083);天津市抗癌重大科技专项(12ZCDZSY16000);乳腺癌预防策略及个体化治疗模式研究(2013BAI09B08)

摘　　要：目的探讨全数字化乳腺X线摄影技术中内外斜位（MLO）的投照角度对图像质量的影响。方法收集接受乳腺X线摄影检查的受检者1 000例,根据MLO位投照角度是否固定分为3个实验组（A、B、C组,MLO位分别以30°、45°、60°的固定角度进行投照）和对照组（D组,MLO位在30°~60°间以平行于胸大肌角度投照）,每组250例。对4组图像质量分别进行评价,并进行统计学分析。结果A、B、C组甲级片分别占84.00%、91.40%、85.60%,乙级片分别占14.00%、7.40%、13.20%,丙级片分别占2.00%、1.20%、1.20%。D组甲级片占92.20%,乙级片占6.80%,丙级片占1.00%。A组和C组质量略低于D组,且各级图像例数均与D组差异有统计学意义（P均〈0.05）。B组各级图像例数与D组差异无统计学意义（P=0.89）。结论采用45°进行MLO位投照,既不会影响图像质量,又可提高检查效率。Objective To explore the effects of projection angle of mediolateral obliqde（MLO）on image quality of mammography.Methods Totally 1 000 subjects were involved and were divided to 3experimental groups（group A,B,C,each n=250）and control group（group D,n=250）.The projection angle of group A,B and C were 30°,45°and 60°respectively.MLO in group D located between 30°— 60°,and the projection angle was parallel to pectoralis muscle.Image quality in 4groups were evaluated and analyzed statistically.Results The ratio of gradeⅠimage in group A,B,C were84.00%,91.40%,85.60%,gradeⅡimage were 14.00%,7.40%,13.20%,and gradeⅢimage were 2.00%,1.20%,1.20%,respectively.The ratio of gradeⅠimage in group D was 92.20%,gradeⅡimage was 6.80%,and gradeⅢimage was 1.00%,respectively.The image quality in group A and B was lower than group D,and compared to group D,the difference of different grade image number had significant statistically（both P〈0.05）.Compared to group D,the difference of different grade image number in group B had not significant statistically（P=0.89）.Conclusion It can not affect the image quality,but also can improve the efficiency of inspection with 45°MLO projection.

关 键 词：乳房X线摄影术 内外斜位 角度 图像质量 

分 类 号：R737.9[医药卫生—肿瘤] R814.4[医药卫生—临床医学]