中国CT和MRI杂志
中國CT和MRI雜誌
중국CT화MRI잡지
CHINESE JOURNAL OF CT AND MRI
2015年
6期
111-114
,共4页
薛水培%万素珍%沈比先%姜梅%汪春荣%张大波%保莲
薛水培%萬素珍%瀋比先%薑梅%汪春榮%張大波%保蓮
설수배%만소진%침비선%강매%왕춘영%장대파%보련
双源CT%管电压%动态管电流%调节%CT血管造影%辐射剂量
雙源CT%管電壓%動態管電流%調節%CT血管造影%輻射劑量
쌍원CT%관전압%동태관전류%조절%CT혈관조영%복사제량
Dual Source CT%Tube Voltage%CARE DOSE 4D%Computed Tomography Angiography%Radiation Dose
目的:探讨双源CT动态管电流调节技术补偿低电压扫描在下肢CTA降低辐射剂量的价值;方法回顾性的分析双源CT下肢CTA患者64例,根据不同的扫描条件分常规组和实验组各32例,应用统计学软件分析两组病例图像质量、CTDIvol、DLP、ED、SNR、CNR是否有统计学意义;结果两组病例图像质量、CTDIvol、DLP、ED、SNR、CNR常规组分别为:2.75±0.44、4.30±0.21、483.53±35.73、8.10±0.54、27.43±4.81、23.38±4.61;实验组分别为:2.72±0.46、2.15±0.11、237.09±13.88、3.56±0.21、28.34±4.96、24.14±4.76。两组图像评分、SNR、CNR均无统计学意义(P>0.05);CTDIvol、DLP、ED均有的统计学意义(P<0.01),实验组小于常规组约50%;结论双源CT动态管电流调节技术管电流补偿低电压扫描在下肢CTA中降低辐射剂量效果明显,是一个值得推广的方法。
目的:探討雙源CT動態管電流調節技術補償低電壓掃描在下肢CTA降低輻射劑量的價值;方法迴顧性的分析雙源CT下肢CTA患者64例,根據不同的掃描條件分常規組和實驗組各32例,應用統計學軟件分析兩組病例圖像質量、CTDIvol、DLP、ED、SNR、CNR是否有統計學意義;結果兩組病例圖像質量、CTDIvol、DLP、ED、SNR、CNR常規組分彆為:2.75±0.44、4.30±0.21、483.53±35.73、8.10±0.54、27.43±4.81、23.38±4.61;實驗組分彆為:2.72±0.46、2.15±0.11、237.09±13.88、3.56±0.21、28.34±4.96、24.14±4.76。兩組圖像評分、SNR、CNR均無統計學意義(P>0.05);CTDIvol、DLP、ED均有的統計學意義(P<0.01),實驗組小于常規組約50%;結論雙源CT動態管電流調節技術管電流補償低電壓掃描在下肢CTA中降低輻射劑量效果明顯,是一箇值得推廣的方法。
목적:탐토쌍원CT동태관전류조절기술보상저전압소묘재하지CTA강저복사제량적개치;방법회고성적분석쌍원CT하지CTA환자64례,근거불동적소묘조건분상규조화실험조각32례,응용통계학연건분석량조병례도상질량、CTDIvol、DLP、ED、SNR、CNR시부유통계학의의;결과량조병례도상질량、CTDIvol、DLP、ED、SNR、CNR상규조분별위:2.75±0.44、4.30±0.21、483.53±35.73、8.10±0.54、27.43±4.81、23.38±4.61;실험조분별위:2.72±0.46、2.15±0.11、237.09±13.88、3.56±0.21、28.34±4.96、24.14±4.76。량조도상평분、SNR、CNR균무통계학의의(P>0.05);CTDIvol、DLP、ED균유적통계학의의(P<0.01),실험조소우상규조약50%;결론쌍원CT동태관전류조절기술관전류보상저전압소묘재하지CTA중강저복사제량효과명현,시일개치득추엄적방법。
Objective To investigate the dual-source CT Lower Extremities CTA using tube current auto Compensatory Low voltage scan to reduce radiation dose.Methods A retrospective analysis of 64 cases of dual-source CT Lower Extremities CTA imaging data. According to the different points of the scanning conditions we divided routine group and experimental group 32 cases each. We applied statistical software to analysis two groups of cases the image quality,CTDIvol, DLP, ED, NR, CNR whether statistical significance. Results The routine group respectively:2.75±0.44、4.30±0.21、483.53±35.73、8.10±0.54、27.43±4.81、23.38±4.61;The experimental group respectively: 2.72±0.46、2.15±0.11、237.09±13.88、3.56±0.21、28.34±4.96、24.14±4.76; Two sets of image quality, SNR, CNR had no statistical significance (P>0.05); Differences between the two groups CTDIvol, DLP, ED values are statistically significant (P<0.01), the experimental group were decreased by approximately 50% compared to the routine group.Conclusion The Dual-source CT Lower Extremities CTA using tube current auto Compensatory Low voltage scan to reduce radiation dose effect is obvious.It is a good method worthy of popularizing.