?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=The+first+large-area%2C+high-X-ray+energy+phase+contrast+prototype+for+enhanced+detection+of+threat+objects+in+baggage+screening&rft.creator=Astolfo%2C+A&rft.creator=Endrizzi%2C+M&rft.creator=Price%2C+B&rft.creator=Haig%2C+I&rft.creator=Olivo%2C+A&rft.description=X-ray+imaging+is+the+most+commonly+used+method+in+baggage+screening.+Conventional+x-ray+attenuation+(usually+in+dual-energy+mode)+is+exploited+to+discriminate+threat+and+non-threat+materials%3A+this+is+essentially%2C+a+method+that+has+seen+little+changes+in+decades.+Our+goal+is+to+demonstrate+that+x-rays+can+be+used+in+a+different+way+to+achieve+improved+detection+of+weapons+and+explosives.+Our+approach+involves+the+use+of+x-ray+phase+contrast+and+it+a)+allows+much+higher+sensitivity+in+the+detection+of+object+edges+and+b)+can+be+made+sensitive+to+the+sample%E2%80%99s+microstructure.+We+believe+that+these+additional+channels+of+information%2C+alongside+conventional+attenuation+which+would+still+be+available%2C+have+the+potential+to+significantly+increase+both+sensitivity+and+specificity+in+baggage+scanning.+We+obtained+preliminary+data+demonstrating+the+above+enhanced+detection%2C+and+we+built+a+scanner+(currently+in+commissioning)+to+scale+the+concept+up+and+test+it+on+real+baggage.+In+particular%2C+while+previous+X-ray+phase+contrast+imaging+systems+were+limited+in+terms+of+both+field+of+view+(FOV)+and+maximum+x-ray+energy%2C+this+scanner+overcomes+both+those+limitations+and+provides+FOVs+up+to+20+to+50+cm2+with+x-ray+energies+up+to+100+keV.&rft.subject=security%2C+baggage+screening%2C+x-ray+phase+contrast%2C+edge-illumination%2C+dark-field+imaging%2C+multimodal+imaging&rft.publisher=Society+of+Photo+Optical+Instrumentation+Engineers+(SPIE)&rft.contributor=Burgess%2C+D&rft.contributor=Owen%2C+G&rft.contributor=Bouma%2C+H&rft.contributor=Carlysle-Davies%2C+F&rft.contributor=Stokes%2C+RJ&rft.contributor=Yitzhaky%2C+Y&rft.date=2016-09-26&rft.type=Proceedings+paper&rft.publisher=Optics+and+Photonics+for+Counterterrorism%2C+Crime+Fighting%2C+and+Defence+XII&rft.language=eng&rft.source=+++++In%3A+Burgess%2C+D+and+Owen%2C+G+and+Bouma%2C+H+and+Carlysle-Davies%2C+F+and+Stokes%2C+RJ+and+Yitzhaky%2C+Y%2C+(eds.)+Proceedings+of+SPIE+9995.++++Society+of+Photo+Optical+Instrumentation+Engineers+(SPIE)%3A+Edinburgh%2C+UK.+(2016)+++++&rft.format=text&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1524245%2F9%2FOlivo_Astolfo_ProcSPIE_PUBLISHED.pdf&rft.identifier=https%3A%2F%2Fdiscovery.ucl.ac.uk%2Fid%2Feprint%2F1524245%2F&rft.rights=open