X线数字断层融合成像与常规DR成像放射剂量比较

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1、万方数据。皇璺：!b剑曼i迨董!x线数字断层融合成像与常规DR成像放射剂量比较郭勇，王庆军，张君，赵书臣，韩静慧【摘要】目的：比较断层融合成像(DTS)与常规DR的放射剂量。方法：将进行X线检查的连续就诊患者随机分入常规DR组和DTS组，选择14个常规检查部位，每个部位、每组各10人。常规DR及DTS均采用GEVolmneRAD．根据成像质量需要及尽可能减少放射剂量的要求选择主要成像参数。结果：各检查部位DTS放射剂量明显高于常规DR(P<0．001)，是常规DR的3．73～12．84倍，平均7．71倍。其中胸椎、腰椎、颅骨、骨盆等部位放射剂量较大．明显高于其他部位(P<0

2、．001)。胸椎、腰椎侧位放射剂量明显高于正位(P<0．001)，分别是正位的2．35倍和1．44倍。结论：DTS平均放射剂量明显高于常规DR，因此在不影响诊断和病变显示的情况下，应选择合理的成像参数、选择体厚小的投照方向．以尽可能降低放射剂量。[关键词】断层融合术；放射摄影术；体层摄影术[中国图书资料分类号]R318．6；R445【文献标志码]A[文章编号]1003—8868(2014)01—0098—03DOI：10．7687／J．ISSNl003—8868．2014．01．098ComparativeStudyofDigitalTomosynthesisandRadi

3、ographyforRadiationDoseGUOYong。，WANGQing-junl，ZHANGJunl，ZHAOShu—chenl，HANJing—hui2(1．DepartmentofRadiology，NavyGeneralHospital，Beijing100048，China；2．GEHeahhcareChina，Beijing100176，China)AbstractⅨ咖曲eTodetectandcomparetheentrancesurfacedoseofdigitaltomosynthesis(DTs)andradiographyinbodyimagi

4、ng．MaIj¨。Totally14partsofthebodywereselectedforbothDTSandradiographyimaging．Therewere10patientsincludedineachpartofthebodyforeachexamination．DTSandradiographywereperformedbyusingaunitofVolumeRAD(GEHeahhcare)．DTSandradiographyparameterswereselectedtoensureagoodimagequalityandalowradiationdo

5、se．PamlltThemeanradiationdosesofDTSineachpansofthebodyweremarkedlvhigherthanthatofradiography(P<0．0011．generally3．73to12．84timesoraveragely7．7ltimesofthelatter．ThemeanradiationdosesofDTSinthoracicvertebrae，lumbarvertebrae，skull，pelviswerenotablyhigherthanthoseinotherpartsofthebody(P<0．001)

6、．Themeanradiationdosesoflateralprojectionweremarkedlyhigherthanthatofanterior—posteriorprojectioninthoracicvertebrae(2．35timesofthatofanterior—posteriorprojectionlandlumbarvertebrae(1．44timesofthatofanterior—posteriorprojection)．C：0-dh蛔ThemeanradiationdoseofDTSismarkedlyhigherthanthatofrad

7、iography．Inordertoreducetheradiationdoseandkeepgoodimagequalitysimultaneously，reasonableDTSparametersandprojectivedirectionshouldbeselected．[ChineseMedicalEquipmentJournal，2014，35(1)：98—99，102]Keywordstomosynthesis；radiography；tomography0引言数字断层融合技术(digitaltomo