乳腺数字化放射成像中参数自动优化模式与影像质量的关系探讨

目的 探讨乳腺数字化放射成像(DR)中参数自动优化(AOP)模式与影像质量的关系,从而选取最优化的AOP模式.方法 运用3种AOP模式即剂量优先模式(DOSE)、标准曝光模式(STD)和对比度优先模式(CNT)分别对乳腺模体进行4次DR摄影,对12幅乳腺影像进行质量分析.运用3种AOP模式对180例受检者进行乳腺DR摄影,并对720幅乳腺影像进行质量分析,再对所有曝光数据和质量评估数据进行统计学分析.结果 DOSE曝光模式的平均腺体剂量(AGD)最低,STD、CNT曝光模式下的AGD值较之均有增加(P<0.05).3种AOP模式12幅模体图像评分均达合格标准,3种AOP模式720幅图像中,质量

Investigation on relationship between automatic optimization of parameter mode in DR mammography and image quality

Objective To investigation the relationship between automatic optimization of parameter(AOP)mode in mammary digital radiography(DR)and image quality for selecting the optimal AOP mode.Methods The mammary phantom was exposed digital radiology mammography four times with three AOP modes:DOSE mode,STD mode and CNT mode.The qualities of 12 mammary images were analyzed.The same methods were performed in 180 subjects and the qualities of 720 mammary images were analyzed.All exposure data and the quality evaluation data were statistically analyzed.Results In the mammary phantom or subject,the average glandular dose(AGD)in DOSE exposure mode was the lowest,AGD in STD and CNT exposure modes was increased(P<0.05).There was statistical significance awong the three AOP exposure modes data(P<0.05).The scores of 12 mammary phantom images were qualified.In the 720 mammary images in three modes,the quantity of the first and second class quality exceeded 98%.Conclusion In the three AOP modes,CNT mode should be used carefully because of the high AGD,DOSE and STD modes should be selected optimally because of the low AGD,low radiation dose,and their imaging qualities reach the diagnostic standard.