中华放射学杂志
中華放射學雜誌
중화방사학잡지
Chinese Journal of Radiology
2010年
10期
1069-1072
,共4页
孙建忠%王志康%章伟敏%蔡劲松
孫建忠%王誌康%章偉敏%蔡勁鬆
손건충%왕지강%장위민%채경송
放射摄影术%胸部%图像质量
放射攝影術%胸部%圖像質量
방사섭영술%흉부%도상질량
Radiography%Tthoracic%Image quality
目的 探讨DR胸部摄影的适宜检查参数.方法 选择73、90、125 kV分别代表低、亚高、高kV,分别选择感度200、400、800以及各级感度±4微调,使用自动曝光控制(AEC)模式对内嵌有CDRAD 2.0的胸部体模曝光,记录每次曝光的剂量面积值(DAP).应用CDRAD 2.0配套分析软件Artinis CDRAD Analyzer 1.1自动分析每次曝光的图像质量(IQFinv)值.选择10名志愿者进行73 kV,S800-2;90 kV,S800+2;125 kV,S400+2,3种组合曝光,由2名医师进行评分,记录其DAP值,所得数据应用SPSS12.0软件进行单因素方差分析.结果 (1)3种组合志愿者曝光图像质量评分73、90、125 kV分别为(2.7±0.5)、(2.9±0.3)、(2.8±0.4)分,差异无统计学意义(F=0.587,P＞0.05).73、90、125 kV的DAP分别为(29.1±7.9)、(30.5±4.5)、(40.4±7.6)mGy·cm2,差异有统计学意义(F=9.803,P＜0.01).(2)3种kV体模曝光DAP值随着感度的增高而下降.每级感度间,DAP值相差11%;相同感度等级,DAP值73 kV＞90 kV＞125 kV.(3)3种kV体模曝光IQFinv 值均随着感度的增高而下降,相同曝光剂量下,IQFinv值73 kV＞90 kV＞125 kV.结论 90 kV与感度S800+2～S800+4组合是DR胸部X线摄影较为适宜的检查参数.
目的 探討DR胸部攝影的適宜檢查參數.方法 選擇73、90、125 kV分彆代錶低、亞高、高kV,分彆選擇感度200、400、800以及各級感度±4微調,使用自動曝光控製(AEC)模式對內嵌有CDRAD 2.0的胸部體模曝光,記錄每次曝光的劑量麵積值(DAP).應用CDRAD 2.0配套分析軟件Artinis CDRAD Analyzer 1.1自動分析每次曝光的圖像質量(IQFinv)值.選擇10名誌願者進行73 kV,S800-2;90 kV,S800+2;125 kV,S400+2,3種組閤曝光,由2名醫師進行評分,記錄其DAP值,所得數據應用SPSS12.0軟件進行單因素方差分析.結果 (1)3種組閤誌願者曝光圖像質量評分73、90、125 kV分彆為(2.7±0.5)、(2.9±0.3)、(2.8±0.4)分,差異無統計學意義(F=0.587,P＞0.05).73、90、125 kV的DAP分彆為(29.1±7.9)、(30.5±4.5)、(40.4±7.6)mGy·cm2,差異有統計學意義(F=9.803,P＜0.01).(2)3種kV體模曝光DAP值隨著感度的增高而下降.每級感度間,DAP值相差11%;相同感度等級,DAP值73 kV＞90 kV＞125 kV.(3)3種kV體模曝光IQFinv 值均隨著感度的增高而下降,相同曝光劑量下,IQFinv值73 kV＞90 kV＞125 kV.結論 90 kV與感度S800+2～S800+4組閤是DR胸部X線攝影較為適宜的檢查參數.
목적 탐토DR흉부섭영적괄의검사삼수.방법 선택73、90、125 kV분별대표저、아고、고kV,분별선택감도200、400、800이급각급감도±4미조,사용자동폭광공제(AEC)모식대내감유CDRAD 2.0적흉부체모폭광,기록매차폭광적제량면적치(DAP).응용CDRAD 2.0배투분석연건Artinis CDRAD Analyzer 1.1자동분석매차폭광적도상질량(IQFinv)치.선택10명지원자진행73 kV,S800-2;90 kV,S800+2;125 kV,S400+2,3충조합폭광,유2명의사진행평분,기록기DAP치,소득수거응용SPSS12.0연건진행단인소방차분석.결과 (1)3충조합지원자폭광도상질량평분73、90、125 kV분별위(2.7±0.5)、(2.9±0.3)、(2.8±0.4)분,차이무통계학의의(F=0.587,P＞0.05).73、90、125 kV적DAP분별위(29.1±7.9)、(30.5±4.5)、(40.4±7.6)mGy·cm2,차이유통계학의의(F=9.803,P＜0.01).(2)3충kV체모폭광DAP치수착감도적증고이하강.매급감도간,DAP치상차11%;상동감도등급,DAP치73 kV＞90 kV＞125 kV.(3)3충kV체모폭광IQFinv 치균수착감도적증고이하강,상동폭광제량하,IQFinv치73 kV＞90 kV＞125 kV.결론 90 kV여감도S800+2～S800+4조합시DR흉부X선섭영교위괄의적검사삼수.
Objective To explore the optimum exposure factors in digital chest radiography.Methods Chest phantom was exposed under auto exposure control model with 73, 90, 125kV and S200,400,800 plus or minor 4 micro-adjust for each sensitivity grade. Meanwhile dose area product (DAP) was recorded and the value of IQFinv was analyzed automatically by Artinis CDRAD Analyzer 1.1. Ten volunteers were exposed with 73 kV, S800 - 2; 90 kV, S800 + 2 and 125 kV, S400 + 2. Two radiologists evaluated and scored image quality. Statistical analysis was performed using one way ANOVA test by SPSS 12. 0. Results ( 1 ) The quality scores of volunteers' images obtained with three combinations of exposure factors were 2. 7 ± 0. 5 for 73 kV group, 2. 9 ± 0. 3 for 90 kV group and 2. 8 ± 0. 4 for 125 kV group. The difference among them was not statistically significant ( F = 0. 587, P ＞ 0. 05 ). Whereas the DAP values were (29. 1 ± 7.9) mGy · cm2 for 73 kV group, ( 30. 5 ± 4. 5 ) mGy ·cm2 for 90 kV group and (40. 4 ±7.6) mGy · cm2 for 125 kV group, with statistically significant difference among them ( F = 9. 803, P ＜0. 01 ). (2) In all three kV conditions, DAP value of phantom declined when sensitivity increased. There was a difference of DAP value by 11％ between two successive sensitivity grades. Under the condition of same sensitivity, DAP value changed with kV in the following order: 73 kV ＞90 kV ＞ 125 kV. (3) The value of IQFinv decreased when sensitivity increased. Under the condition of same sensitivity, IQFinv changed with kV as follow: 73 kV ＞90 kV ＞ 125 kV. Conclusion The combination of exposure factors of 90 kV and S800 + 2-S800 +4 is optimum for digital chest radiography.
