简介:摘要目的分析探讨胸部X线诊断纵膈气肿的临床价值。方法将2014年3月—2015年3月我院收治的68例纵膈气肿患者纳入本次研究,均进行胸部X线诊断,进一步分析评价诊断结果。结果经胸片X线检查,68例患者中,明确诊断为纵膈气肿共59例(86.76%),怀疑诊断8例(11.76%),漏诊1例(1.47%)。基于胸部正位片呈纵膈旁线条样透亮影表现,共18例;基于纵膈内表现为多发不规则条片状影24例,且于侧位胸片显示更加清晰。此外,有18例合并颈部或胸部皮下气肿,14例合并肋骨骨折、8例合并四肢骨折、7例合并肩胛骨骨折。结论胸部X线诊断纵膈气肿效果显著,能够清楚地判断可疑纵膈气肿及纵膈气肿的临床症状,进一步为临床医治方案的确立提供有效科学依据。
简介:Whitelight-emittingYVO_4:1mol.%Dy~(3+),xmol.%Eu~(3+)phosphorpowderswithordermorphologyandwellcrystallizationwerehydrothermallysynthesizedat180°C.Themicrostructure,white-lightemission,andlight-emittingmechanismofthepowderswerecarefullystudiedusingX-raydiffractometry,scanningelectronmicroscopyandphotoluminescencespectra.TheexcitationandemissionspectraofthephosphorpowdersindicatedthecoexistenceofefficientenergytransferfromEu~(3+)toDy~(3+)andinefficientenergytransferfromDy~(3+)toEu~(3+)besidestheenergytransferfromVO_4~(3–)toEu~(3+).IncreasingtheEu~(~(3+))concentrationinitiallyenhancedandthenweakenedtheluminescentintensityofDy~(3+).Thewhite-lightemissionsofYVO_4:1mol.%Dy~(3+),xmol.%Eu~(3+)phosphorpowderswerebothrelatedtotheenergytransferbetweenVO_4~(3–)andDy~(3+)/Eu~(3+),aswellasbetweenEu~(3+)andDy~(3+).TheinefficientenergytransferfromDy~(3+)toEu~(3+)wasfirstfound.
简介:Wehavedevelopedanewradiographysetupwithashort-pulselaser-drivenx-raysource.Usingaradiographyaxisperpendiculartobothlong-andshort-pulselasersallowedoptimizingtheincidentangleoftheshort-pulselaseronthex-raysourcetarget.Thesetuphasbeentestedwithvariousx-raysourcetargetmaterialsanddifferentlaserwavelengths.Signaltonoiseratiosarepresentedaswellasachievedspatialresolutions.ThehighqualityofourtechniqueisillustratedonaplasmaflowradiographobtainedduringalaboratoryastrophysicsexperimentonPOLARs.