CAJ | 학술논문

目的探讨数字乳腺摄影机钼/钼(Mo/Mo)、钼/铑(Mo/Rh)、铑/铑(Rh/Rh)阳极靶滤过组合影像质量与辐射剂量的差异.方法用全数字乳腺X线摄影机的Mo/Mo、Mo/Rh、Rh/Rh阳极靶滤过组合对FLUKE NA 18-220乳腺模体进行摄影,摄影采用自动曝光模式,4名医师分别扫描3次,分别记录摄影条件和辐射剂量,计算平均值.所得图像在相同条件下进行阅读,并按照美国放射学院(ACR)的评分标准对模体中的钙化点、纤维组织、肿块灶进行评分,并计算平均值,并采用方差分析对评分进行比较.结果 Mo/Mo、Mo/Rh和Rh/Rh阳极靶滤过组合在自动曝光模式下,对模体影像中纤维组织的评分分别为(5.50±2.12)、(5.38±1.98)和(5.38±1.98)分,差异无统计学意义(F=4.56,P＞0.05)；对钙化点的评分分别为(4.50±1.85)、(4.25 ±1.56)和(4.38±1.68)分,差异也无统计学意义(F =4.32,P＞0.05)；对肿块灶的评分分别为(4.38±1.38)、(4.38±1.38)和(4.25±1.56)分,差异有统计学意义(F=36.65,P＜0.05).Rh/Rh的表面入射剂量和平均腺体剂量分别为(5.11±1.89)和(1.08 ±0.13)mGy,Mo/Mo分别为(6.66 ±2.33)和(1.29 ±0.38)mGy,Mo/Rh分别为(5.67±2.02)和(1.29±0.38) mGy,Rh/Rh较Mo/Mo及Mo/Rh的表面入射剂量和平均腺体剂量均低.Mo/Rh阳极靶滤过组合较Mo/Mo表面入射剂量低.结论 Rh/Rh和Mo/Rh靶滤过组合由于辐射剂量低且能清晰显示乳腺内的病变,因此适合大多数乳腺腺体进行摄影,Rh/Rh靶滤过组合的电压较高,穿透力较强,因此在腺体厚度较厚时首选Rh/Rh靶滤过组合.Mo/Mo靶滤过组合对肿块灶的显示较高,因此在需要高分辨率影像时选用Mo/Mo靶滤过组合.
목적 탐토수자유선섭영궤목/목(Mo/Mo)、목/로(Mo/Rh)、로/로(Rh/Rh)양겁파려과조합영상질량여복사제량적차이.방법 용전수자유선X선섭영궤적Mo/Mo、Mo/Rh、Rh/Rh양겁파려과조합대FLUKE NA 18-220유선모체진행섭영,섭영채용자동폭광모식,4명의사분별소묘3차,분별기록섭영조건화복사제량,계산평균치.소득도상재상동조건하진행열독,병안조미국방사학원(ACR)적평분표준대모체중적개화점、섬유조직、종괴조진행평분,병계산평균치,병채용방차분석대평분진행비교.결과 Mo/Mo、Mo/Rh화Rh/Rh양겁파려과조합재자동폭광모식하,대모체영상중섬유조직적평분분별위(5.50±2.12)、(5.38±1.98)화(5.38±1.98)분,차이무통계학의의(F=4.56,P＞0.05)；대개화점적평분분별위(4.50±1.85)、(4.25 ±1.56)화(4.38±1.68)분,차이야무통계학의의(F =4.32,P＞0.05)；대종괴조적평분분별위(4.38±1.38)、(4.38±1.38)화(4.25±1.56)분,차이유통계학의의(F=36.65,P＜0.05).Rh/Rh적표면입사제량화평균선체제량분별위(5.11±1.89)화(1.08 ±0.13)mGy,Mo/Mo분별위(6.66 ±2.33)화(1.29 ±0.38)mGy,Mo/Rh분별위(5.67±2.02)화(1.29±0.38) mGy,Rh/Rh교Mo/Mo급Mo/Rh적표면입사제량화평균선체제량균저.Mo/Rh양겁파려과조합교Mo/Mo표면입사제량저.결론 Rh/Rh화Mo/Rh파려과조합유우복사제량저차능청석현시유선내적병변,인차괄합대다수유선선체진행섭영,Rh/Rh파려과조합적전압교고,천투력교강,인차재선체후도교후시수선Rh/Rh파려과조합.Mo/Mo파려과조합대종괴조적현시교고,인차재수요고분변솔영상시선용Mo/Mo파려과조합.
Objective To compare imaging quality and radiation dose of different anode filter combination for full-field digital mammography.Methods The image of FLUKE NA 18-220 phantom were taken at full-field digital mammography (FFDM),system with Mo/Mo,Mo/Rh,Rh/Rh anode/filter combination by automatic exposure control,record the exposure factors and doses.The images on monitor with the best window width and window level were read by 4 independent radiologists,the images of specks groups,nylon fibers and masses was assessed by the 4 experienced readers at the criterion of American College of Radiology 1999 mammography quality control manual.Statistical analysis was performed using analysis of variance.Results The nylon fibers scores of Mo/Mo,Mo/Rh and Rh/Rh were 5.50 ± 2.12,4.50 ± 1.85 and 4.38 ± 1.38 ; the specks groups scores of Mo/Mo,Mo/Rh and Rh/Rh were 5.38 ± 1.98,4.25 ± 1.56 and 4.38 ± 1.38;the masses scores of Mo/Mo,Mo/Rh and Rh/Rh were 5.38 ± 1.98,4.38 ±1.68 and 4.25 ± 1.56,the detection of specks groups,nylon fibers was not statistically significant ( F =4.56 and 4.32,P ＞ 0.05 ),but the detection of masses was statistically significant ( F =36.65,P ＜ 0.05).The radiation doses were different,the entrance surface dose (ESD) and average glandular dose (AGD) of Rh/Rh were (5.11 ± 1.89) and ( 1.08 ± 0.13 ) mGy,the ESD and AGD of Mo/Mo were (6.66 ± 2.33 )and ( 1.29 ± 0.38 ) mGy,the ESD and AGD of Mo/Rh anode/filter combination were (5.67 ± 2.02) and ( 1.29 ± 0.38) mGy.Conclusions The radiation dose of Rh/Rh and Mo/Rh anode/filter combination of FFDM were lower,and the imaging was clear,so Rh/Rh and Mo/Rh anode/filter combination of FFDM prefer to mostly patients,especially when the thinkness is large,Rh/Rh anode/filter combination is preferred,because the kV values was higher,the penetration of X-ray was stronger.The Mo/Mo anode/filter combination was used when the needs of high-resolution,because the detection of masses of it was better.