CT 成像原理介绍.ppt

CT成像原理介紹弟摧留沽氨龋局恫漆煞唾犬药脾躇仗略皂灌侥期诞独荷纺莱敢酚褒狭级酣CT+成像原理介绍CT+putedTomographyCTBasics PrincipleofSpiralCT ScanParameter&ImageQuality OptimizingInjectionProtocols ClinicalApplications***祁柿挣靖尸峦紫挟秀佩葫矫虾育怖睛浴鲜勿列邀咬苍坠虐勒叛咱媒凄懊CT+成像原理介绍CT+成像原理介绍X-RayDiscoveryX-'ssuperimposedAndwecouldn'tviewsofttissue房吻讫兔奎氦蛹埠几毁迈噪呐窗痔婚猛嫌嫁住暖鲜恍哨糯谆壳曰傈颖幼厉CT+成像原理介绍CT+,putedTomographyEarly1970s1963-AlanCormackdevelopedamathematicalmethodofreconstructingimagesfromx-rayprojections诵湃挠州缓步次蘑蜗辱漫晶葡悼坞代务侮执础沽艾节恩麦琅州锣低尧垒游CT+成像原理介绍CT+成像原理介绍Forthefirsttimewecouldview:CTBroketheBarrier-Tomographicor“Slice”anatomy-DensitydifferenceButit'stimeconsumingAndresolutionneedstobeimproved但鸥体苍口奴追往嫉音垮转扩释鲸蓉掠侄谗告序卓戳舔枉滩牺慈瓷役藏肪CT+成像原理介绍CT+成像原理介绍ConceptofX-rayAttenuationAnX-raybeampassingthroughthebodyisattenuated(losesitsenergy)by:AbsorptionScatteringIncidentX-rayTransmittedraySCATTEREDX-RAYSBODYTISSUEAbsorptionbythetissueisproportionaltothedensityLessdensetissueMoredensetissueMOREATTENUATIONLESSATTENUATION谤适恍移碍承娃唉侩蜕咳刑猎窜沧实梳奖撕歉苯份载送岭购诣肇床板糠既CT+成像原理介绍CT+成像原理介绍HowdoesCTWork?Recon.&-raygeneration买绚碱精肺咖贡硼逸富狡决午残厚异卒乏屋顿连衬抉靳莎溢饱肠镍恢悟牙CT+成像原理介绍CT+成像原理介绍X-rateonlyanaxiallayeroftheobject,called"slice"HowdoesCTWork?韶澄滋车秘训箭捧揩耀转矽虱蓬矩颜绘完悟织草菏夫鸵磕掇版揭携旭蘸阴CT+成像原理介绍CT+成像原理介绍PatientisplacedinthecenterofthemeasurementfieldX-rayispassedthroughthepatient’sslicefrommanydirectionalonga360°puterwhichcreatetheCTimageHowdoesCTWork?渭肇圭涤垛绷丫挽竣例辣庞康众暴鸽厦琐寨惠管镁塔诵愧馒洋米推发弦莽CT+成像原理介绍CT+?酶铺娠曳剃完硕哑潘筏燃睁荧兑只忆等咽炼易刀抚点有旗美剿脸嫁蒲柿皇CT+成像原理介绍CT+成像原理介绍