实用放射学杂志
實用放射學雜誌
실용방사학잡지
JOURNAL OF PRACTICAL RADIOLOGY
2013年
5期
810-814
,共5页
曾宪春%何波%康绍磊%谢晓洁%韩丹
曾憲春%何波%康紹磊%謝曉潔%韓丹
증헌춘%하파%강소뢰%사효길%한단
Safire重建%噪声,眼眶%计算机体层成像
Safire重建%譟聲,眼眶%計算機體層成像
Safire중건%조성,안광%계산궤체층성상
目的 通过对眼外伤CT扫描数据行FBP(filtered back projection)和Safire(sinogram affirmed interative reconstruction)重建图像对比的研究,探讨Safire技术在眼部外伤CT扫描中的价值.方法 眼部外伤50例行眼眶CT平扫,分别用FBP和Safire(Strength 1~5级)重建,对6组重建图像测其平均CT值、噪声、信号噪声比(SNR)、对比噪声比(CNR)、主观评分及病变检出情况对比分析.结果 与FBP重建相比,Safire(Strength 1~5级)重建后,噪声分别降低15.7%,27.4%,36.2%,41.8%,53.9%;SNR分别提高18.6%,37.5%,55.7%,69.6%,118.1%;CNR分别提高21.6%,32.9%,56.4%,83.9%,104.4%.差异有统计学意义(P<0.05).图像主观评分Safire 2~4高于FBP重建,Safire-3评分最高,Safire-1和Safire-5图像评分低于FBP,但6种重建图像的病变检出率一致.结论 Safire重建技术能有效降低图像噪声及提高图像质量,在眼部外伤扫描中具有潜在降低扫描剂量的作用.
目的 通過對眼外傷CT掃描數據行FBP(filtered back projection)和Safire(sinogram affirmed interative reconstruction)重建圖像對比的研究,探討Safire技術在眼部外傷CT掃描中的價值.方法 眼部外傷50例行眼眶CT平掃,分彆用FBP和Safire(Strength 1~5級)重建,對6組重建圖像測其平均CT值、譟聲、信號譟聲比(SNR)、對比譟聲比(CNR)、主觀評分及病變檢齣情況對比分析.結果 與FBP重建相比,Safire(Strength 1~5級)重建後,譟聲分彆降低15.7%,27.4%,36.2%,41.8%,53.9%;SNR分彆提高18.6%,37.5%,55.7%,69.6%,118.1%;CNR分彆提高21.6%,32.9%,56.4%,83.9%,104.4%.差異有統計學意義(P<0.05).圖像主觀評分Safire 2~4高于FBP重建,Safire-3評分最高,Safire-1和Safire-5圖像評分低于FBP,但6種重建圖像的病變檢齣率一緻.結論 Safire重建技術能有效降低圖像譟聲及提高圖像質量,在眼部外傷掃描中具有潛在降低掃描劑量的作用.
목적 통과대안외상CT소묘수거행FBP(filtered back projection)화Safire(sinogram affirmed interative reconstruction)중건도상대비적연구,탐토Safire기술재안부외상CT소묘중적개치.방법 안부외상50례행안광CT평소,분별용FBP화Safire(Strength 1~5급)중건,대6조중건도상측기평균CT치、조성、신호조성비(SNR)、대비조성비(CNR)、주관평분급병변검출정황대비분석.결과 여FBP중건상비,Safire(Strength 1~5급)중건후,조성분별강저15.7%,27.4%,36.2%,41.8%,53.9%;SNR분별제고18.6%,37.5%,55.7%,69.6%,118.1%;CNR분별제고21.6%,32.9%,56.4%,83.9%,104.4%.차이유통계학의의(P<0.05).도상주관평분Safire 2~4고우FBP중건,Safire-3평분최고,Safire-1화Safire-5도상평분저우FBP,단6충중건도상적병변검출솔일치.결론 Safire중건기술능유효강저도상조성급제고도상질량,재안부외상소묘중구유잠재강저소묘제량적작용.