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迭代重建技术在CT颈动脉入颅底段CT血管成像中的作用 被引量：10

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摘要 目的探讨256层混合迭代重建算法对改善颈动脉入颅段图像质量及辐射剂量的价值。方法对60例患者行256层头颈联合成像，其中30例行常规剂量扫描，分别采用滤波反投影（FP）重建生成图像（组）及迭代iDoe4重建生成图像（组），30例行低剂量扫描分别采用FP重建（组）及iDoe4重建（D组），并对四组图像的噪声、信噪比（N）、对比噪声比（N）、图像质量主观评分及有效辐射剂量进行评价。采用单因素方差分析比较各组间客观图像质量评价指标，采用等级资料的多个独立样本Kukl．耽脲检验比较各组间主观图像质量评分，采用配对检验比较常规剂量组和低剂量组的有效辐射剂量。结果4组图像噪声分别为8．21±0．88、7．31±0．33、11．17±2．02和6．50±0．49，N分另U为43．21±4．49、51．83±3．64、42．88±9．19和53．47±4．88，N分别为37．88±4．02、61．21±6．31、36．63±8．20和62．99±5．90，差异均有统计学意义（F值分别为112．786、97．041和86．098，P值均〈0．01）。除组和D组的图像噪声差异无统计学意义外，其余两组差异具有统计学意义（P值均〈0．01）；除组和组、组和D组的N和N差异无统计学意义外，其余两组差异具有统计学意义（P值均〈0．01）。图像质量评分分别为1、2、3分者，组分别为2、13和15例，组分别为0、7和23例，组分别为5、15和10例，D组分别为0、5和25例，各组图像质量评分差异有统计学意义（日值=22．575，P值〈0．01）。常规剂量组有效辐射剂量为（2．31±0．13）mv，低剂量组为（0．84±0．04）mv，差异有统计学意义（=60．682，P〈0．05）。结论迭代重建算法在颈动脉入颅段成像中，在辐射剂量降低50％以上的情况下仍能获得优良的诊断图像。 Ojeiveoexploeheoleof256ieiveeonuioninimpovingimgequliyndeduingdiiondoeofoideyinonilegmen.Mehodixypienundewenhedndnekon256nne.onvenionldoenningwpefomedin30pienuingfileedkpojeion（FP）eonuion（goup）ndieiveiDoe4eonuion（goup）.Lowdoenningwpefomedinheohe30pienuingFPeonuion（goup）ndiDoe4eonuion（goupD）.henoie,N,N,oeofimgequliyndeffeivediiondoeweeevluedinfougoup.One-wyNOVwuedonlyzeheimgequliyindexeweengoup.IndependenmpleofKukl-Wllieofnkeddwuedoompeimgequliyoeeweengoup.Piedewuedoompeheeffeivediiondoeeweenhelowdoegoupndonvenionldoegoup.eulheimgenoieoffougoupwee8.21±O.88,7.31±0.33,11.17±2.02nd6.50±0.49epeively.Nwee43.21±4.49,51.83±3.64,42.88±9.19nd53.47±4.88,epeively.Nwee37.88±4.02,61.21±6.31,36.63±8.20nd62.99±5.90,epeively.heeweeiidiffeene（F=112.786,97.041nd86.098,P〈0.01）.hediffeeneofimgenoieeweengoupndhdnoiiignifine,whihwiidiffeeneweengoupnd（P〈0.01）.ExephhediffeeneofNndNeweengoupnd,ndDhdnoiiignifine,hediffeeneeweenohewogouphdiiignifine（P〈0.O!）.Ineofimgequliyoeof1,2nd3,heewee2,13nd15pieningoup;0,7nd23pieningoup;5,15nd10pieningoup;nd0,5nd25pieningoupD.heewiidiffeeneofimgequliyoeeweenehgoup（H=22.575,P〈O.O1）.heeffeivediiondoew（2.31＋0.13）mvinonvenionldoegoupnd（0.84＋0.04）mvinlowdoegoup.heewiidiffeeneeweenhewogoup（=60.682,P〈O.05）.onluionomped^ihonvenionldoe,iDoe4ieiveeonuionlgoihmnoinexellenimgeoffooide^inohenilegmenwihmoehn50%diiondoedeee.
作者 汪芳 杨利莉 哈若水 赵艳红 吴金花
机构地区 宁夏人民医院放射科
出处 《中华放射学杂志》 CAS CSCD 北大核心 2013年第11期975-979,共5页 Chinese Journal of Radiology
基金 宁夏自然科学基金资助项目（NZl264）
关键词 体层摄影术x线计算机血管造影术辐射剂量 omogphy,X-yompued ngiogphy diiondoge
分类号 R816.2 [医药卫生—放射医学]
  • 相关文献

参考文献8

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二级参考文献17

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共引文献78

同被引文献74

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引证文献10

二级引证文献104

中华放射学杂志
2013年 第11期

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