摘要
目的:了解数字乳腺摄影中辐射剂量水平及影响因素。方法:收集60例受检者的乳腺摄影参数,包括管电压、受压腺体厚度、压力、曝光量、平均腺体剂量(average gland dose,AGD)等,然后统计分析单幅图像辐射剂量水平及影响因素。结果:受检者乳腺单幅图像的AGD为(1.06±0.39)mGy,与国际电离辐射防护和辐射源安全基本标准(IBSS)规定的投照剂量指导水平(3mGy)相比较低(P<0.05)。影响辐射剂量的因素主要包括曝光量、管电压和腺体厚度,其中曝光量及受压腺体厚度与辐射剂量成正相关,管电压与辐射剂量成负相关。结论:在确保图像质量的前提下,适当降低曝光量、受压腺体厚度和增加管电压,有利于降低受检者辐射剂量。
Objective： To investigate the level and influencing factors of radiation dose with digital mammography. Methods ： The mammography parameters from 60 patients including tube voltage, gland thickness with compression, pressure, exposure and average gland dose（AGD） were collected. And the data were analyzed statistically. Results： The AGD of single image of breast was （ 1.06 ＋ 0. 39） mGy, which was lower than the instruction radiation dose level（ 3mGy ）formulated by IBSS（ P 〈 0. 05 ）. The influencing fac- tors of radiation dose included exposure, tube voltage and gland thickness with compression, among which, exposure and gland thick- ness with compression were positively correlation with radiation dose; tube voltage was negatively correlated with radiation dose. Con- clusion： Reducing exposure, gland thickness with compression and increasing tube voltage properly are helpful for reducing radiation dose on the premise of ensuring image quality.
出处
《肿瘤预防与治疗》
2012年第1期35-37,共3页
Journal of Cancer Control And Treatment
关键词
数字摄影
乳腺
辐射剂量
影响因素
Digital Mammography
Breast
Radiation Dose
Influencing Factors
